Engineering Manual. EZ Series VP & EZ Series VR (DR. VTAC option)

Transcription

1 EZ Series VP & EZ Series VR (DR. VTAC option) Perfect fit for Replacing Existing GE 8500 & 7500 Series and for New Construction Projects Engineering Manual MANUFACTURER OF QUALITY AIR CONDITIONING AND HEATING PRODUCTS Rev. A

2 Table of Contents INTRODUCTION...1 APPLICATIONS New Construction...2 Retrofit/Replacement...2 Application Considerations...3 Guaranteed Quality...3 Indoor Air Quality Dr. VTAC...3 PRODUCT OVERVIEW Quiet Operation...4 Durable Construction...4 Seacoast Construction...4 PRODUCT FEATURES AND BENEFITS...5,6 Identification...6 Slide Out Chassis...6 Wall Sleeve...6 Exterior Louver/Grilles...6 Removable Front Panel...6 Discharge Grille...6 Tangential Blower Wheel...7 Slinger Fan...7 Venturi Shroud...7 Return Air Filters...7 Fresh Air Vent...7 DATA & SPECIFICATIONS Model Nomenclature EZVP...8 Replacement Guide EZVP...8 Performance Data EZVP...9 Model Nomenclature EZVR...10 Performance Data EZVR...11 Product Information EZVR...12 Dimensional Drawings...11,12 OPTIONS AND ACCESSORIES...12 Hardwire Kit...12 Power Cord...12 Optional Two-Stage Heater...12 Lateral Duct...12 INSTALLATION INSTRUCTIONS Clearances and Projections...13 Selecting a Location...13 Preparing the Wall Opening...13,14 Front Grille...15 Installation Condensate Drain Kit...20 Stamped Rear Grille...21,22 Architectural Rear Grille Chassis Installation Measurements...23 INFORMATION FOR HEAT PUMP UNITS.24 ELECTRICAL INSTALLATION Wire Harness Kit...25 Voltage Measurements...25 LCDI Power Cord...25 Hardwire Kit...25 Wiring Diagram-Standard Model SYSTEM CONTROLS AND MANAGEMENT User Interfaces Digital Control Panel...28 Remote Control...28 Wall Thermostats...28 Front Desk Controls...28 System Management Software Fan Cycle Control...29 Room Freeze Prevention...29 High Temperature Compressor Protection...29 Low Temperature Compressor Protection...29 Diagnostic Software...29 Custom Operation and Continual Room Temperature Monitoring...29 Features and Operating Guidelines...30 Remote Wall Mounted Thermostats...31 Remote Thermostat interface...32 Control Board...33 Performance Specifications Unit Warranty...39 Islandaire reserves the right to make changes in design and construction at any time without notice.

3 Our Company Islandaire is the fastest growing specialty air conditioning and heating manufacturer in the country. Founded in 1992 by Robert Hansen, it has grown into a multi-million dollar company in just a few short years. Islandaire builds a full complement of high quality thru-the-wall replacement air conditioners and heat pumps, water source heat pumps, and gas units in East Setauket, New York. Each model fits perfectly into the existing original wall sleeve assembly, thereby saving both time and money during installations. Our Engineering, Production, Sales and Customer Service departments have been fully integrated to provide the maximum degree of user satisfaction. We at Islandaire feel that this team approach to manufacturing produces a superior overall product and assures a larger degree of flexibility in design and production scheduling to meet tight prototyping or construction timetables. The Perfect Fit Thru-wall air conditioners were developed in the late 1950's. Over the next forty years many companies engineered, manufactured and installed a variety of different units throughout the United States and Canada. Today, a number of these companies are no longer in business or have discontinued their line of thru-wall air conditioners and no longer carry replacement parts. Islandaire offers replacement air conditioners and heat pumps that are interchangeable with units no longer available from the original manufacturer. Our units are engineered to fit perfectly within the existing wall sleeve, thereby reducing installation time and expense. They are manufactured at our modern 75,000 square foot plant on Long Island in New York. Thank you for considering our products, The Islandaire Team 1

4 Applications The EZ Series VP & VR units are designed and manufactured for new construction or the replacement of packaged terminal air conditioning (VTAC) units in an existing building. Our packaged terminal air conditioning (VTAC) units provide year-round comfort control for hotels, motels, apartments, dormitories, shops, nursing homes, assisted living centers, satellite offices, room additions and other applications that require economical heating and cooling The product is designed for individually zoned comfort controlled heating and cooling. We offer our cooling chassis to operate with cooling only or electric heat. The design standards, heavy duty construction and the focus on indoor noise reduction has created our unit as the premier unit of the future. Individually controlled VTAC units are ideal for rooms that are not occupied during vacancies, holidays, weekends or nights. Individual units allow tenants to choose the degree of comfort and operating economy. Thermostat and fan settings are controlled via wall thermostat control. In addition, all units have the flexibility of working with controls that integrate with an energy management system. Whether you are designing a new structure or replacing VTAC units in an existing building, Islandaire will meet your needs. New Construction The Islandaire EZVP Vertical Terminal Air Conditioner (VTAC) unit is designed to meet the needs of the architect, engineer, and contractor. For unit installation, Islandaire s expert support network will assist in all applicable aspects of the construction project, from preparing a budget to start-up. ADVANTAGES FOR NEW CONSTRUCTION Design Flexibility For The Architect Engineer Super-quiet performance, indoors and out No bulky duct system No separate equipment room No water towers or additional cooling equipment Optional architectural grille to permit custom exterior appearance Lower Operating Costs & Reliable Comfort for the Occupant Islandaire helps lower utility costs with energy efficient units that exceed industry standards. Energy savings are achieved in both heating and cooling environments through efficient mechanical design and onboard electronic logic. Separate indoor and outdoor fans provide lower operating costs. Energy management software is built into the unit s standard digital controls. These units may also qualify for electrical power company rebates. (Consult your local utility provider for rebate opportunities.) Retrofit/ Replacement Islandaire VTAC units are engineered to fit perfectly within existing GE wall sleeves, thereby reducing installation time and expense. There is no time wasted on redesigning an existing wall opening or removing an old wall sleeve. Just slide the old chassis out and replace with a new one from Islandaire. EZ Quick slide-out chassis eases installation into the wall sleeve. Rapid servicing reduces downtime: complete chassis can be replaced in minutes without disrupting other occupants. 2

5 Applications (Cont.) Application Considerations It is important for air conditioning systems to be properly sized for each application in order to achieve desired temperature and humidity levels. It is strongly recommended that a professional engineer match the VTAC units with the building structure and climate. The following application considerations are all important in choosing the proper VTAC system for the building structure. UNDERSIZING If a VTAC unit is undersized (cooling capacity is less than required capacity for an application), the unit will not be able to cool the space down to the desired temperature during very hot days, causing excessive power consumption. OVERSIZING If a VTAC unit is oversized (cooling capacity is greater than required capacity for the specific application), the unit will cool the space down to the desired temperature too quickly creating a cool, yet excessively humid, space. AIR INFILTRATION Excessive air infiltration can intensify problems associated with undersizing or oversizing a VTAC unit. This can be the cause of insufficient cooling, dehumidification, or heating. Sources of air infiltration include vents, gaps around windows and doors, and improperly sealed floors, ceiling or wall joints. Guaranteed Quality Each Islandaire unit is designed to operate quietly and efficiently and is backed by the best warranty program available. Standard warranty is one year parts and labor including five year compressor part only warranty or two year parts only including five year compressor part only warranty. Whether it is an exact replacement unit or a new construction project, Islandaire is the smart choice for all your air conditioning and heating needs. Indoor Air Quality - DR. VTAC In addition to an already quiet unit, we have developed an indoor air quality option called Dr.VTAC. Dr. VTAC is a two stage system. The primary stage conditions room air and tempers the air to acceptable air quality levels. The secondary stage brings in conditioned outside air at a rate of up to 55 CFM, to compensate for toilet exhaust and room occupancy, and continuously pressurizes the room. The secondary stage is initiated by an outdoor humidistat that allows the unit to condition the incoming fresh air to about 55% RH. The system can be calibrated to run at higher outdoor RH levels, but the recommended maximum set point 55% outdoor RH. When outdoor RH levels are above the set point, the secondary compressor is initiated and conditions make up air below the set point. The secondary fan continuously runs allowing fresh, conditioned, make-up air at a rate of up to 55 CFM (leaving coil cfm) to enter the room. The unit is manufactured in accordance to ARI, UL, CSA standards for the primary side and AHAM and UL standards for the secondary side. 3

6 Product Overview (EZVP & VR) Quiet Operation The EZVP units provide whisper quiet operation while delivering maximum airflow required for proper air circulation. Separate indoor and outdoor fan motors further reduce operating sound levels and costs. The heavy gauge construction of the chassis and cabinet minimizes vibration for quieter operation. Vibration isolators on the rotary compressor keep it running smoothly and quietly. The unit bulkhead is fully insulated to decrease outdoor sound transmission. All Units Have Seacoast Construction Application of air conditioning equipment in a corrosive environment requires special consideration. The corrosive nature of salt water vapor, chlorine and acid vapor, demands a unit that can withstand these environments. Any metal portion that is exposed to a corrosive vapor must be specially treated. All Islandaire VTAC units have special corrosion protection that can help dramatically extend the life of the unit. Listed below are just some of the components that feature corrosion protections: Durable Construction Islandaire EZVP/EZVR units are built with durable, quality components designed for continuous operation in all environments. Our wall sleeves are constructed of thick 18 - gauge galvanized steel for maximum durability. The outdoor fan motor is totally enclosed, preventing damage from moisture and debris introduced by extreme weather conditions. Both indoor and outdoor fan motors are permanently lubricated for extended life. Electrical components are located on the indoor side of the wall protecting them from driving rain and humidity. The compressor is a reliable, high efficiency design rotary compressor. It is hermetically sealed and designed for continuous operation. Wall Sleeve The entire wall sleeve is constructed of 18-gauge galvanized steel. Base Pan Base pan has a corrosion resistant coating to protect it from the elements. Condenser Coil Protective coating applied to the coil to prevent corrosion and weathering. Condenser Fan Blade Constructed of strong engineered plastic that has excellent flameresistance and dimensional stability over a wide range of service temperatures. Condenser Fan Motor Specially coated by the manufacturer to resist corrosion. Compressor Protective coating applied by the manufacturer on the exterior to enhance equipment life and performance. Outdoor Louver Made of aluminum, etched and anodized for maximum corrosion protection. Available in stamped or architectural styles. Can be painted in a wide choice of colors. Standard on All Models: Corrosion protection treatment shields the EZVP unit from corrosive environments and extends the life of the unit especially in coastal locations. 4

7 Product Features and Benefits Slide Out Chassis Slide-out chassis makes installation simple All components are readily accessible to service personnel On-board diagnostic software and display help diagnose potential problems Designed to replace older units with minimal modification Isolated rotary compressor design for continuous efficient, reliable and quiet operation See page for chassis installation instructions Wall Plenum Thick insulation on the top and sides to reduce noise and increase efficiency Heavy-gauge (18 ga. ) steel with powder paint coating for maximum scratch, dent and corrosion resistance. See pages 13 for wall sleeve installation instructions Exterior Louver/Grilles Architectural extruded aluminum grille Custom colors available (Ask for our color chart sheet) Recessed available Stamped Grille See pages 21 and 22 for exterior grille installation instructions Removable Front Panel Made from tough metal material that won t rust, resists scratches and is easy to clean Quick removal ensures shorter installation time and faster service calls Easy access to removable filters 5

8 Ordering Data Model Nomenclature Please review the nomenclature/model number breakdown below for the EZ Series VP options. Units are available in four cooling BTUH sizes: 9,000; 12,000; 15,000; 18,000 Voltage options are: 208/230V, and 277V. Control choices include a unit mounted digital control; multiple wired wall mounted heating/cooling thermostats and a wireless wall thermostat, with occupancy sensor control. COMPONENT EZ - Cooling Chassis MODEL TYPE VP - Islandaire 24 X 24 EZ VP 12 A 2 C 1 N 4 5 A A FUNCTIONAL OPTIONS A- None B- Motorized Fresh Air Damper COOLING CAPACITY 09-9,000 BTU 12-12,000 BTU 15-15,000 BTU 18-18,000 BTU SYSTEM TYPE A- Standard Chassis (R410A) B - Heat Pump (R410A) VOLTAGE / LINE CORD 2-230V 20 Amps 3-230V 30 Amps 4-230V Junction Box Volt 20 Amp Volt Junction Box 9-230V 15 Amps POWER MANAGEMENT OPTIONS A- None C- Energy Mgt. N/O D- Energy Mgt. N/C IDENTITY CODE 0 - Special 5 - Standard HEATING OPTIONS A- None, Cooling Only B KW Electric Heat C KW Electric Heat E KW Electric Heat HYDRONIC OPTIONS 1- None ROOM CONTROLS N - Standard Electronic Control Remote Thermostat RETURN DISCHARGE OPTIONS 4 - Front Ret./Top Dis. Replacement Guide WALL OPENING DIMENSION DISCHARGE RETURN AIR HEAT TYPE MANUFACTURER MODEL 20 1/8" x 32 1/4" ANGLED TOP BOTTOM FRONT electric HYDRONIC AC HP AMANA VTC & VTH GE AZ85 6

9 Performance Data Performance Data for EZVP Series Volts 60Hz 1ph Cool Capacity Total (BTU/H) Cooling Capacity Sensible (BTU/H) Cooling Capacity Latent (BTU/H) Cooling Power Input (W) Cooling Amps EER CFM High CFM Low Conditioned Make Up Air (CFM) Heating Capacity H.P (BTU/H) Heating Power Input (W) C.O.P. Sound In/Out (dba) Shipping Weight (LBS) EZ09 EZ09 EZ12 EZ12 EZ15 EZ15 EZ18 EZ /58 39/58 42/62 42/62 42/62 42/ /62 42/ Heating capacities specified in accordance with ARI standard at conditions of 47 F WB outdoor and 70 F DB/60 F WB indoor. Wattage, Amperage, COP, EER listings include compressor, evaporator motor and condenser fan motor. Cooling capacities specified in accordance with ARI standard at conditions of 95 F DB/75 F WB outdoor and 80 F DB/67 F WB indoor. Heating options HEATING OPTION VOLTAGE (I) WATTAGE BTUS (2) AMPS (3) B C E 208 2,050 7, ,500 8, ,500 8, , ,600 12, ,600 12, ,100 14, ,000 17, ,000 17, (1)Voltage is Single Phase,Alternating Current and R.M.S.(2) Heating Capacity (B.T.U./ Hr.) based on indoor blower motor and heating elements. (3) Amp values are a combination of indoor blower motor and heating elements. Electrical ezvp LINE VOLTAGE 208/ / / MAXIMUM AMPERAGE WALL SOCKET CONFIGURATION RECEPTACLE NUMBER NEMA 6-15R NEMA 6-20R NEMA 6-30R NEMA 7-20R ELECTRICAL HEAT OPTIONS NEMA 7-30R * All data is subject to change. 7

10 EZ Series VR Model Nomenclature Please review the nomenclature/model number breakdown below for the EZ Series VR options. Units are available in four cooling BTUH sizes: 9,000; 12,000; 15,000; 18,000 Voltage options are: 208/230V, and 277V. Control choices include a unit mounted digital control; multiple wired wall mounted heating/cooling thermostats and a wireless wall thermostat, with occupancy sensor control. EZ VR 12 A 2 C 1 N 4 5 A A COMPONENT EZ - Cooling Chassis MODEL TYPE DR - Dr. VTAC 24 x 24 cooling capacity 09-9,000 BTUH 12-12,000 BTUH 15-15,000 BTUH 18-18,000 BTUH System Type A - Standard Chassis B - Heat Pump VoltAge/line cord 2-230V 20 Amp 3-230V 30 Amp 4-230V Junction Box Volt 20 Amp Volt Junction Box 9-230V 15 Amp Heating Options A - None Cooling Only B KW Electric Heat C KW Electric Heat E KW Electric Heat Hydronic Options 1 - None room controls N - Std Electronic (Remote T-Stat) Identity Code 0 - Special 5 - Standard Functional Options A- None B- Dehum-heater Power Mgt. Options A- None P- Energy Mgt. N/O T- Energy Mgt. N/C return/discharge options 4 - Front Ret./ Top Dis. FEATURES: 55 CFM Continuous Conditioned fresh air Motion sensor/door switch capable Superior temperature control Dehumidification of room air Modern and elegant appearance Washable filter for easy cleaning User friendly control panel Hand held remote controller Wired wall thermostat required Compressor freeze protection Self diagnosis Random Auto Re-Start Compressor time delay Front desk control Room side freeze protection Motorized fresh air damper OPTIONS: Two stage electric heat Electric heat add-on for the DR.VTAC fresh air system for cold climates ACCESSORIES: Condensate removal kit 18 gauge insulated wall sleeve Wired remote thermostat Wireless remote thermostat I.R. motion sensor Door Switch LEED Points Achieved: 1. Energy Efficient Design and compliance with ASHRAE 62.1 and ASHRAE Indoor Enviromental Quality with improved IAQ through make up air. 3. Innovation in Design through the use of a Make Up Air VTAC. 4. Regional Design through the use of Dr. VTAC in high humidity climates. 5. Diverting Construction Debris through the use of re-usable containers. 6. Recycling/reusing Dr. VTAC in secondary market where the first costs areprohibitive to owners 8

11 Performance Data Performance Data for EZVR Series Volts 60Hz 1ph Cooling Capacity Total (BTU/H) Cooling Capacity Sensible (BTU/H) Cooling Capacity Latent (BTU/H) Cooling Power Input (W) Cooling Amps EER CFM High CFM Low Conditioned Make Up Air (CFM) Heating Capacity H.P (BTU/H) Heating Power H.P (W) Heating options HEATING OPTION VOLTAGE (I) WATTAGE BTUS (2) AMPS (3) B C E EZ09 EZ09 EZ12 EZ12 EZ15 EZ15 EZ18 EZ C.O.P Dr. VTAC Comp. Amps¹ Dr. VTAC Comp. Watts¹ Dr. VTAC Fan Amps¹ Dr. VTAC Dehumidification (Liters/day)¹ Dr. VTAC Dehumidification (Liters/day)² Dr. VTAC Control Automatic Automatic Automatic Automatic Automatic Automatic Sound In/Out (dba) 39/58 39/58 42/62 42/62 42/62 42/62 Shipping Weight (LBS) Heating capacities specified in accordance with ARI standard at conditions of 47 F WB outdoor and 70 F DB/60 F WB indoor. Wattage, Amperage, COP, EER listings include compressor, evaporator motor and condenser fan motor. Cooling capacities specified in accordance with ARI standard at conditions of 95 F DB/75 F WB outdoor and 80 F DB/67 F WB indoor. ¹AHAM condition 60% RH, 80 F ²High End Condition 88% RH, 82 F 208 2,050 7, ,500 8, ,500 8, , ,600 12, ,600 12, ,100 14, ,000 17, ,000 17, Automatic Automatic 42/62 42/ Electrical (1)Voltage is Single Phase,Alternating Current and R.M.S.(2) Heating Capacity (B.T.U./Hr.) based on indoor blower motor and heating elements. (3) Amp values are a combination of indoor blower motor and heating elements. ezvr LINE VOLTAGE 208/ / / MAXIMUM AMPERAGE WALL SOCKET CONFIGURATION RECEPTACLE NUMBER NEMA 6-15R NEMA 6-20R NEMA 6-30R NEMA 7-20R ELECTRICAL HEAT OPTIONS NEMA 7-30R * All data is subject to change. 9

12 Product information The Dr. VTAC system is an add on system to our standard VTAC unit to provide conditioned makeup air into a space thru the VTAC unit by providing 55 CFM of outdoor air 24/7 by forced fan and cycling dehumidifier compressor based on outdoor relative humidity levels. Dr. VTAC was created to solve issues with dehumidification in rooms and to introduce fresh air due to deficiencies of oxygen levels. Dr. VTAC is not only a VTAC but a Conditioned Make Up Air unit. New ASHRAE studies show that many illnesses in hotel rooms can be attributed to oxygen deficient atmospheres. Dr. VTAC solves that issue by introducing tempered conditioned make up air that satisfies both humidity level introduction and supplied oxygen. Dr. VTAC is a two stage system. The primary unit is responsible for control of Sensible Heat that is introduced into the room via make up air temperature and thermal load of the occupants. The secondary unit is primarily a dehumidification unit that provides 55 CFM of outside fresh air into the room. The correction of the Sensible Temperature comes from the main VTAC unit which provides additional dehumidification with temperature correction. Overall unit efficiency over standard VTAC s is approximately 3% improvement. The compressor/dehumidification process is controlled by a humidistat (factory set at 50% RH) which is monitoring the outdoor relative humidity level and is adjustable by a qualified servicer. When the outdoor humidity level raises above 50% RH the compressor and dehumification process starts. Below 50% RH compressor operation and dehumidification is stopped, however, fan operation continues to provide 55 CFM of outdoor air into the space. The dehumification system has a temperature switch which is monitoring both the refrigeration and the outdoor air temperatures. If the outdoor air goes below 38 F the compressor is disabled with fan operation continuing to provide outdoor air into the space. All dehumidifier controls and safeties are automatic reset. An optional air tempering heater is available for the fresh air system for applications where operation in cold winter climates is required. Condensate from the dehumidifier drains into the VTAC drain pan, where it is then also slung onto the condenser coil for re-evaporation outside when the A/C runs. Excess condensate is drained into the wall case which can then either drain to the outside thru the louver OR piped to a drainage system via an optional drain kit. ADVAnTAgES OF THE DR. VTAC SYSTEM: 1. Lower installation/renovation costs than typical DOAS* 2. Decrease inconvenience to customer due to construction/installation of a DOAS* system 3. Precise humidity control in a room compared to a simple VTAC vent or Power vent system 4. Allows fresh make up air to travel entirely across sleeping and living areas of a room, exiting through a duct or under the door *DOAS = Dedicated Outdoor Air System 10

13 Dimensional drawings Units must be installed in accordance with all applicable codes. Ensure that there is adequate clearance for servicing and proper operation. A minimum of 18 inches in front of the chassis is required. Provide additional space for service technician to work on the unit. Ensure that drapes, bed, bedspread, furniture, etc. DO NOT block either return or discharge air openings. Figure 1 Dimensional Drawings (Unit Top Down View) 2 1/4" Outdoor Grille Plenum 1.0" Plenum A Outside Wall 23 1/8" Wide Closet Wall VP/VR Chassis/Case 231/8" Deep E C D B E Important Notes A dimension determined by wall thickness and plenum size selected B dimension minimum 4" for front installation B dimension minimum 5" for side installation C and D dimensions minimum 3" for front installation C and D dimensions minimum 5" for side installation E dimension minimum for 28" door - 33" E dimension minimum for Islandaire Access Panel - 30" 11

14 Dimensional drawings (Cont.) Figure 1-A Dimensional Drawings (Unit and Platform) 23 1/8" 31" 23 1/4" 23 1/4" 23 1/8" Options and Accessories Hard Wire kit Used in place of a plug-in power cord Connects unit directly to building mains All 265V units require a hard wire kit 12

15 Installation Overview Wall Plenum Since the unit itself does not install in the wall opening, the use of a plenum is necessary to contain and separate the outdoor air paths. The plenum must be able to hold water in the bottom without leaking into the wall cavity. It also must have a splitter to separate the outdoor air paths and prevent the discharge air from being drawn back into the unit. The wall plenum is the first component to be installed. The wall opening location for the plenum needs to extend 1" below the top of the Installation Platform. Since the platform must be a minimum of 8" off the floor, the cutout for the plenum must be a minimum of 7" plus the thickness of the platform base, off the interior finished floor. Islandaire offers four plenums, and the choice of the correct plenum is determined by the thickness of the building exterior wall. Each of the plenums is 19 7/8" wide by 32" high and require a 20 1/8" wide by 32 1/4" high cutout in the wall. The plenum is to be installed square and level in the opening and secured to the wall construction with screws or nails in the sides located a minimum of 2" from the bottom of the plenum. No nails or screws may be used in the bottom or top of the plenum to ensure against water entering the wall cavity. The plenum is not load bearing, so a proper header needs to be installed above the plenum the same as over any window opening in the wall. If the building construction is brick, concrete block, or other non self-supporting material, a lintel must be installed over the plenum opening. The plenum must be caulked to the wall, both to the outdoor wall face and to the interior wall, along all four sides to prevent air and water infiltration. The installation of flashing, with a 45 drip lip, is recommended under the plenum. Installation Platform The VTAC requires a field supplied installation platform. The installation platform must be a minimum of 23 1/4" square, with legs to raise the platform a minimum of 8" (12" recommended), and have a minimum load bearing capacity of 175 pounds. The platform legs must be positioned so access to the unit drain connection is not blocked. Cut out in platform for future access to drain lines to be determined in field. The closet enclosure needs to be large enough to provide the following clearances for the platform (assuming the minimum 23 1/4" square platform). Platform 13

16 Installation Overview (Cont.) Unit installed from the front of the sleeve - 4" minimum clearance from front of platform to inside of closet door - 3" minimum clearance on each side. Unit installed from the side of the sleeve - 5" minimum clearance from the installation side wall or door - 5" minimum in the front of the unit - 3" minimum on the side opposite the installation side. When determining the closet depth, consideration must be given to the fact that the plenum will protrude into the closet because the plenum is thicker than the exterior wall. The platform is positioned against the plenum, and secured to the floor with brackets and screws. The platform needs to be secured to the floor to prevent the platform from shifting since the unit is secured to both the plenum and the mounting platform. Unit including sleeve and front panel The unit is packaged with the sleeve and the front panel in place (filter not included). Installation begins by removing the front panel and pulling the unit out of the sleeve. The empty sleeve is positioned on the platform in the closet with the outdoor side facing the wall plenum opening (remove the side panel if a side installation is to be made) and secured to the plenum with six field supplied screws (stainless recommended). Level the sleeve using the four leveling legs and, using the holes in the bottom of the sleeve as guides, drill holes in the mounting platform to secure the sleeve to the platform. Use four field-supplied bolts, washers and nuts to secure the sleeve to the mounting platform. Do not tighten the bolts to the point of distorting the sleeve. Side Screw Hex Bolt Side Screw Failure to secure the sleeve to the platform may result in excessive unit vibration and increased noise level. Install the unit into the sleeve, either through the front or side panel opening. With the unit in position in the sleeve, replace the side panel (if removed) and the front panel. Ground the unit to the sleeve by installing the front unit-to-sleeve hex bolt and/or the sleeve-to-unit side screw (only on side installs). The drain connection is made by connecting a 90 PVC elbow to the unit s female 3/4" NPT drain connector. The other end of the elbow is used to run the drain to either the internal or external drain. The unit is shipped with a secondary drain hole. This drain hole is shipped open and must either be plugged or connected to an independent drain system. If a secondary drain system is used, attach a 90 schedule 40 PVC elbow to the secondary drain hole directed toward the secondary drain system. If a secondary drain system is NOT used, install a 3/4" schedule 40 PVC plug to cap the hole. *Ensure drain lines going out the plenum are sloped downward to allow water to drain out. A 10" diameter flange on the top of the unit is used to connect to field supplied, insulated, flexible or rigid transition duct with an adjustable ring clamp. Flexible duct may be used for transitions only. Rigid duct must be used for 90 bends and tees. Do not use flexible duct for unsupported runs of five feet or more. 14

17 Front Panel Installation Instructions Interior Grille 1. The return air from the room to the unit may enter the enclosure closet through one of four ways. A louvered door may be installed on the closet to allow return air to enter the closet through the louvers. When a louvered door is used, the filter would be installed in the filter bracket on the front panel of the unit. 2. A wall-mounted access panel (Option 1) may be used instead of the louvered door. In this installation access to the unit is through a wall-mounted access panel rather than a door. The return air is through the panel. The access panelrequires a 28" wide by 48" high cutout in the wall and there is a filter bracket behind the grille louvers. 3. The return air grille (Option 2) may also be used and is designed to be installed in a 20 3/8" by 20 3/8" cutout in a flush closet door. In this installation, a filter can fit into the bracket in the rear of the grille. Figure 2 Front Panel Installation OPTION 1: THE FRONT PANEL MUST BE LINED UP WITH THE CUTOUT ON THE UNIT SLEEVE. 50" 30" Cutout Dimensions: 28"W x 48"H OPTION 2: FRONT PANEL IS FOR RETURN AIR AND MUST ALIGN WITH RETURN ON LOWER PART OF SLEEVE. A field-supplied return air grille, with a minimum dimension of 20" by 20", may be used if mounted in a cutout in the door or wall. When employing this method for return air, the filter is installed in the bracket mounted on the unit. OR 22-1/2" 22-1/2" Cutout Dimensions: 20-3/8"W x 20-3/8"H 15

18 Installation Instructions Install the appropriate wall plenum. Install the appropriate wall plenum through the exterior wall in accordance with page 13. Properly square and level plenum Architectural Louver Exterior/Outside Wall Wall Plenum Type 1: 6"D x 19 7/8"W x 32"H Type 2: 8"D x 19 7/8"W x 32"H Type 3: 10"D x 19 7/8"W x 32"H Type 4: 12"D x 19 7/8"W x 32"H Sleeve 1. Build and Install the VP/VR Base Platform 1. Construct a 23 1/4" min. x 23 1/4" min. square platform with legs to raise the platform a minimum of 8". NOTE: The platform must have a load-bearing capacity of 175lbs. minimum. Left side of platform 23.25" min. 8" min. for drain access NOTE: Specific cutout size for drain connections needs to be determined by the installer for the given installation situation. 5.25" Back of platform 23.25" min. 5.25" 6.5" 8.5" Cutout for drain connection(s) (see NOTE below) 2. Make the drain hole cutout(s): Primary Drain - Centerline of drain is approximately 5.25" from left platform edge and 8.50" from back platform edge. Primary Drain - Centerline of drain is approximately 6.50" from left platform edge and 5.25" from back platform edge. 3. Place the platform in the utility closet with the following clearance between it and the interior surface of the walls/door/panel: 4" min. from the front of the sleeve - Unit to be installed through front of sleeve 5" min. from the front of the sleeve - Unit to be installed through side of sleeve 3" min. from two sides of the sleeve - (5" for side installation) 4. Align the platform with the opening of the wall plenum and secure to the floor using appropriate brackets and bolts. 16

19 Installation Instructions (Cont.) 2. Install the Drain(s) 3. Ductwork An external or an internal drain must be attached to the primary drain connector. A secondary drain is supplied if required by state and local codes. Refer to the local codes for proper installation of the drains. If the secondary drain is not used, seal its drain port with a 3/4" MNPT plug. External Drain Prepare the closet ductwork for later connection to the case. The total flow rate (CFM) and external static pressure (ESP) available can be estimated from the chart below. Use these charts to select your fan speed setting. The collar on top of the case accepts standard 10" duct. Pull all duct tight. Extra duct slack can greatly increase static pressure. Your airflow should be balanced based on many factors, such as available ESP, room CFM, and ductwork. Consult an HVAC engineer for proper applications. Higher CFMs tend to increase Sensible capacity, enhance room circulation and increase duct noise, while lower CRMs tend to increase Latent capacity and reduce noise. NOTICE: Flex duct can collapse and cause airflow restrictions. Do not use flex duct for 90 bends or unsupported runs of 5 feet or more. 17

20 Installation Instructions (Cont.) 4. Install and Connect the Case 5a. Install and Ground the Inside wall Remove the front sleeve panel and pull the unit out of the case. Place the empty sleeve on to the platform in the closet with the outdooe side facing the wall plenum opening. Align the sleeve with the plenum opening and attach it with six field supplied sheet metal screws(corrosion resistant screws recommended. Adjust the leveling legs so the sleeve is level from side to side and from level to 1/4 bubble tild to the outdoors. Rigid ductwork Unit to the SLEEVE UNIT INSTALLED THROUGH FRONT OF CASE 1. Slide the back of the unit into the case. Push the unit all of the way into the case until it stops. NOTE: Either of the sleeve sides may be removed to enable the unit to be slid into the sleeve. 2. Ground the unit to the sleeve by installing the front sleeve-to-unit hex-bolt and discard the two sleeve-to-unit side screws. Air discharge outlet Hex Bolt Leveling legs 3. Using field-supplied screws, bolt the sleeve to the platform. Secondary 3/4" drain option. If not used, seal with a MNPT plug. Primary female drain fitting 3/4" 5b. Install and Ground the Unit to the Case UNIT INSTALLED THROUGH SIDE OF CASE 1. Slide the side of the unit into the case. Push the unit all of the way into the case until it stops. NOTE: Either of the sleeve sides may be removed to enable the unit to be slid into the sleeve. 2. Attach the sleeve side panel to the main unit. 3. Ground the unit to the sleeve by installing the front unit-to-sleeve hex-bolt and discard the two sleeve-tounit side screw NOTE: Piping is not supplied with the unit. Obtain locally. Bolt case to platform External drain OR Internal drain(s). 4. Connect the internal or external drain(s) as necessary. Hex Bolt 18

21 Installation Instructions (Cont.) 6. Make Unit Electrical Connections 1. Connect the thermostat wires to the unit and set the dip switches to the appriopriate settings. NOTE: See the Remote Thermostats section on Page 31 and the manual of the separate thermostat for proper connections and settings. 7. Connect the Top Duct 1. Install the duct onto the air discharge outlet. Inside wall Rigid ductwork Flexible or rigid duct work Thermostat Air discharge outlet Maximum Wiring Length for Thermostat Connection to the Unit 66 ft. for AWG ft. for AWG 20 AWG - American Wire Gauge Unit Connections 2. Make power connections to the unit. NOTE: See the Electrical Installation section on Page 25, as appriopriate, or this manual for proper connections. 3. Replace the case front panel by replacing the four front screws and the two top screws. 2. Secure the top duct to the unit by turning the four case top duct adjusting screws until they are tight. Use a field supplied clamp to lock the top duct to the case. Top duct Clamp Case top duct adjusting screws 19

22 Condensate Drain Kit Internal Drain Installation The drain kit can be installed as an internal drain on the bottom of the case to allow condensate to drain into an internal drain system inside of the building. Locate the drain so that it will be on the room side of the wall when the cabinet wall sleeve is installed. NOTE: The drain kit must be installed prior to the installation of the case. 1. Locate an area on the wall sleeve that will be inside the room when the sleeve is installed. If a subbase is installed, locate the kit a minimum of 3 1/2 from the front flange of the wall sleeve. This clearance will provide adequate clearance for the subbase. 2. Cutout the template shown to the right. Using this template, locate and drill the drain kit holes as close to the outside wall as possible. 3. Using detail figure on page 23 as a guide, assemble the drain gasket, drain fitting plate, and indoor drain fi tting together. Install the assembly into the drilled holes and secure using the two indoor mounting screws provided. The screws must be inserted INSIDE the and TOP driven down into the drain fitting plate. Figure 3 Internal Drain Location Determine location of internal drain. Drill mounting holes. Drain location from side to side is determined by building drain system. Drain location from front edge of wall sleeve should be a minimum of 3.5 inches if using a subbase. Ensure drain tube is not restricted. Cover the two screw heads with a good quality outdoor caulking (not supplied) for additional corrosion protection. NOTE: If the drain fitting is not connected to an indoor drainage system immediately after the wall sleeve is installed; plug the hole with cork (not included) to prevent indoor water damage in case it rains. 4. Install a 1/2 ID tube or hose (not included) on the drain fitting and interconnect it to the drain system inside of the building. Ensure that there are no kinks or traps in tube or hose. Kinks or traps can cause improper drainage. 5. Install the two drain blank-off plates and outdoor drain gaskets on the outdoor portion of the wall sleeve as shown in figure 15. These components can be installed after the case is secured in the wall opening just prior to the installation of the condenser grille and chassis. 20

23 Rear Grille Installation Instructions Stamped Rear Grille Figure 4 Standard Grille Fastener The architectural louver exterior grille is mounted to the exterior flange of the plenum and held in place with four screws inserted from inside enclosure closet. The grille is designed specifically for use with the VTAC unit and the use of any other grille must be approved by Islandaire Air Conditioning Applications Engineering. Standard louvered grille Installation 1. Prepare the grille for installation by installing the five plastic fasteners supplied through the holes in the grille. 3. Guide the alignment pins, located on the lower-right and lower-left hand corners of the grille, with their corresponding holes on the rear outside edge of the wall sleeve. If installing the grille from inside the room: Use the attached plastic handle to keep a firm grasp on the grille. Angle the grille through the opening at the rear of the wall sleeve, then pull the grille back to the wall sleeve and align the screw heads to the hole. Be sure to keep a firm grip on the plastic handle and grille to prevent it from dropping and/or causing possible injury or property damage. Remove the plastic handle when installation is complete. 4. Secure the grille to the wall sleeve by installing screws into the plastic fasteners. Be careful not to damage fasteners by overtightening. Figure 5 Std. Grille Installation INSIDE WALL PLASTIC FASTENER ANGLE THE GRILLE THROUGH THE OPENING AT BACK OF WALL SLEEVE 1 STANDARD GRILLE Figure 6 Std. Grille Installation SECURE THE GRILLE TO THE WALL SLEEVE BY TIGHTENING SCREW HEADS IN HOLES. 2 PULL FORWARD TO INSERT SCREW HEADS INTO KEYHOLE SLOTS DO NOT OVERTIGHTEN HOLES 21

24 PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT Rear Grille Installation Instruct. (Cont.) Architectural Rear Grille The rear grille directs condenser airflow and provides a protective barrier for the outdoor coil. Either the approved Standard or Architectural grille must be installed before installing the chassis. Architectural louvered grille kit installation 1. Install the four threaded studs into the threaded openings on the inside face of the grille. Install a washer and one hex nut to the end of each stud. 2. Manipulate the grille out through the rear wall sleeve opening. Be sure to keep a firm grip on the grille to prevent it from dropping and/or causing possible injury or property damage. 3. Attach the grille to the sleeve by aligning and inserting the hex nut threaded onto the studs through the holes in the wall sleeve. PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT 4. Secure the grille to the sleeve by tightening the hex nut and adding and tightening an additional hex nut. Figure 7 Threaded Stud Installation STUD ARCHITECTURAL GRILLE INSTALL THE FOUR THREADED STUDS INTO THE THREADED OPEN- INGS ON THE INSIDE FACE OF THE GRILLE. INSTALL WASHERS AND HEX NUTS TO THE END OF EACH STUD. Figure 8 Arch. Rear Grille Installation INSIDE WALL HEX NUT WASHER ARCHITECTURAL GRILLE Figure 9 Architectural Rear Grille Parts Architectural Rear Grille, 4 Studs, 4 Washers, (8) Hex Nuts PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT 1 ANGLE THE GRILLE THROUGH THE OPENING AT BACK OF WALL SLEEVE PULL FORWARD TO GUIDE HEX NUTS 2 THROUGH HOLES IN WALL SLEEVE, THEN TIGHTEN HEX NUTS. SECURE WITH AN ADDITIONAL HEX NUT. WALL SLEEVE ARCHITECTURAL GRILLE 2 PRODUCED BY AN AUTODESK EDUCATIONAL PRODUCT 22

25 Chassis Installation Measurements UNIT INSTALLED THROUGH FRONT OF CASE Top View Architectural Louver ~3" ~1-7/8" UNIT INSTALLED THROUGH SIDE OF CASE Top View Architectural Louver ~3" ~1-7/8" 11-1/2" 3" min. 11-1/2" 5" min. 3" min. 10" 10" duct 10" 10" duct Door/access panel 3" min. Unit front 4" min. Door/access panel Unit front 5" min. Side View 4" min.from front of case Unit installed through FRONT of case. 5" min.from front of case Unit installed through SIDE of case. 3" min.from two sides of case. Option 1 Access panel with return air grille Option 2 Return air grille Inside wall Rigid ductwork Flexible or rigid duct 31" Air discharge outlet Wall plenum divider Filter bracket Drain fitting 3/4" Unit Plenum cutout 32-1/4"H x 20"W Outside wall Wall plenum-extend 1/4" for caulking Drain line Exterior/Outside A Secure platform to the floor Bottom of case approx. 2" above bottom of plenum Wall plenum 8" min. for drain access Platform: 23-1/4" x 23-1/4" square Min. load capacity: 175 lbs. B Bottom of case approx. 2" above bottom of plenum Platform A Minimum recommended access door width: 30" B Minimum recommended access door height: 50" Outside wall Field supplied outer flashing 23

26 Information for Heat Pump units Heat pump models offer substantial savings over models with conventional electric resistance heaters Islandaire s VTAC units provide indoor comfort in the same manner as conventional air conditioners, removing heat and humidity from indoor air. The heat and humidity is released to the outdoors. Islandaire s high efficiency design saves energy and reduces cooling costs. When the outdoor coil temperature is above 20 F (approximately 35 F outdoor-air temperature), the heat pump draws heat from outdoor air and uses it to heat indoor air. Since the heat supplied to the room is the result of reversing the refrigeration cycle, the heat pump use less power than a conventional heating system, therefore reducing energy costs. Reversing Valve: The reversing valve controls the direction of refrigerant flow for both heating and cooling functions and remains energized as long as the controls are in the heat position. When the cooling controls are activated, the valve automatically reverses to the cooling position. NOTE: Be sure to connect reversing valve wiring to the B (blue wire) connection of the thermostat for heat pump applications. If the outdoor coil temperature falls below 20 F (approximately 35 F outdoor-air temperature), the unit automatically switches to a backup electric heater. The compressor stops and a blower circulates warm air produced by the heater. When the outdoor coil temperature rises above 40 F, heat pump operation resumes automatically. Heat Pump Features Outdoor Thermostat: During the heating cycle, the outdoor thermostat senses outdoor coil temperature. It switches the unit to electric heat mode when the outdoor coil temperature is 20 F or below (approximately 35 F outdoor-air temperature). The thermostat switches the unit back to heat pump mode when the outdoor coil temperature rises above 40 F, which is enough to provide heat to meet demand. The entire operation is completely automatic. 24

27 Electrical Installation HARDWIRE KIT Figure 10 Hardwire Kit Cord connection to a wall socket is not permitted for 265 volt units. All 265-volt units must be hard wired using the hard wire kit or make use of the plug-in receptacle in the standard subbase. LCDI CORDS 230/208V units are equipped with LCDI or AFCI power cords and can open the electrical circuit to the unit. In the event the unit does not operate, check the reset button located on or near the head of the power cord as part of the normal troubleshooting procedure. Figure 11 LCDI Cord VTAC WIRE HARNESS KIT See VTAC Wire Harness Kit Installation Instructions for proper wire orientation and location for low voltage wiring. VOLTAGE MEASUREMENTS Once the unit is properly wired, measure the unit supply voltage. Voltage must fall within the voltage utilization range as shown in the table below. UNIT VOLTAGE RATING OPERATING VOLTAGE VOLTAGE UTILIZATION RANGE MINIMUM MAXIMUM 230/

28 Wiring Diagram Figure 12 Wiring Diagram VP/VR 26

29 Wiring Diagram (Cont.) Figure 13 Wiring Diagram VP/VR 27

30 System Controls and Management USER INTERFACES The Islandaire EZVP VTAC can be operated by several different control systems. Listed on this page are some of the important control features and a brief description of their functions. Wall Thermostats Terminal connections on the main control board allow easy conversion from an on-board control panel to a wall mounted thermostat control (wired or wireless). See pages 30 & 31 for full details Figure 15 Wall Thermostats Front Desk Control Low voltage terminals on the main control board allow easy connection to a front desk energy management system. Front desk controls allow the unit to be operated from a remote location. Front desk controls can reduce energy consumption by allowing front desk personnel to turn the unit off when a room is vacant. 28

31 System Controls and Management (cont.) SYSTEM MANAGEMENT SOFTWARE The Islandaire EZVP VTAC is equipped with an on-board control system that contains system management software and sensors. Built in safety features protect the unit from the damaging effects of freezing temperatures and power interruptions. Energy management features allow unit performance to be customized and control power consumption. System monitoring software helps service personnel quickly correct any problems. Listed below are some of the important control features and a brief description of their functions. See Performance Specifications section starting on page 33 for full details of all functions. Room Freeze Prevention The indoor freeze protection monitoring system prevents unoccupied rooms from reaching freezing levels that can damage plumbing and fixtures. This feature is automatic regardless of mode and does not require any additional settings. This feature can be turned on or off by adjusting DIP switch settings on control board. High Temperature Compressor Protection The life of the compressor is extended through a built in temperature protection. The system will initiate a compressor lockout if the compressor temperature exceeds 154 F or if the outdoor air temperature falls below 35 F. Low Temperature Compressor Protection An indoor frost sensor will disable the operation of the compressor if freezing conditions exist. This protects the compressor from damage due to airflow reduction or low outdoor air temperature. When the coil temperature rises to a safe temperature the compressor resumes normal operation. Diagnostic Software The system management software performs selfdiagnostic tests that can alert service personnel to potential problems. Error codes are stored and can save service call time during troubleshooting and maintenance. Custom Operation and Continual Room Temperature Monitoring The system board utilizes a built-in temperature sensor for measuring room temperature. When a predetermined (user defined) temperature set point is reached, the on-board controls automatically adjust unit operation to match. 29

32 Unit Features and Operational Guidelines Auto Restart Feature To prevent multiple units from powering up simultaneously after a power outage, there will be a random 5 to 15 second delay before the unit turns on after power has been restored. Memory Recall Feature The control board utilizes non-volatile memory; computer memory that can retain stored information when not powered. This allows all control settings to be saved and recalled after a power failure or if power is disconnected while servicing the unit. Freeze Protection Feature If the temperature in a vacant room falls below 50 F (4.4 C) the freeze prevention thermostat automatically starts the heating cycle to prevent freezing conditions. All other operations will be disabled until the temperature rises above 58 F. When the temperature of the freeze prevention thermostat rises above 58 F the system will resume normal operations. Heater Safety Feature When heater is powered off, fan will automatically stay on and run for 60 seconds to ensure the removal of residual heat. Compressor Short Cycle Protection Built-in three minute timing delay: If cycle is interrupted, the compressor will not restart for three minutes. On all initial power ups there is a one time 3 minute time delay before the unit will function. Operating Guidelines Do not block airflow. Efficient operation of the unit depends on free circulation of air. Paper, leaves, and other debris can reduce efficiency and cause serious damage to the compressor. Ensurethatobjectssuchasdrapes,furniture, or plants are not blocking supply and return airflow. Do NOT operate unit with front panel removed or without filte, as this will void any warranties. Keep doors and windows closed. Leaving them open will increase the workload on the unit and will result in higher operating cost and excessive condensate. Do NOT operate unit during construction. Construction dust can clog filter and cause permanent damage to other components. 30

33 Remote Thermostats Remote Wall Mounted Thermostats Remote Thermostat Control The EZVP can be controlled by any remote electronic thermostat that can interface with RCBWYG terminals. A Wiring harness is provided with conductors for all applications (Heat Cool, Heat Pump, Multispeed Fan, etc.) see details on the next page. During a call, the remote thermostat will pass R back to the controller on a respective terminal. Note: In terms of outputs, there are two types of thermostats: Mechanical and Solid State. Manufacturers of solid state output thermostats include loading resistors in their installation kits. These (560 Ohm 3W) resistors are meant to load thermostat solid state outputs in order for the output voltage to be either 0 or 24VAC, i.e. no floating voltage. These resistors are connected from W, Y, G to common (C), respectively You can wire any type of 24Vac thermostat straight into the Remote Thermostat Interface on the VTAC control board (see page 37). Remote Control Node Used with a wireless wall thermostat, the RCN communicates with the thermostat using unlicensed 900 MHz, radio frequency energy. Wireless Wall Thermostat Wireless wall thermostats are designed to provide precise temperature control without the installation labor and expense of wiring. Powered by AA batteries Mounts in any suitable location that will provide an accurate room temperature reading. Large LCD display provides the user with current room temperature, set point temperature, time, program interval, and other system status information. 31

34 Remote Thermostat Interface The remote thermostat interface terminal block is located on the power module board. A Wiring harness is provided with conductors for all applications (Heat Cool, Heat Pump, Multispeed Fan, etc.) It provides a connection for remote thermostat and energy management inputs. Terminal R (Red) Low voltage terminal to supply voltage to an external wall mounted thermostat. This terminal is capable of supplying 100 ma at VAC RMS over the entire input voltage range specified Terminal LS (Purple) When this low voltage terminal is connected to the R terminal, the compressor and electric heater are disabled to provide an energy management system interface. Terminal GH (Green) When this low voltage terminal is connected to the R terminal, and the unit is in remote mode, the blower/ fan will be requested for operation on high speed. Terminal B (Blue) When this low voltage terminal is connected to the R terminal, and the unit is in the remote mode, the reversing valve is energized. Hydronic and electric heat shall be attempted as backups if the B terminal is asserted and the compressor is locked out or disabled. This is subject to the configured heat modes available. Terminal Y (Yellow) When this low voltage terminal is connected to the R terminal, and the unit is in remote mode, the compressor will be switched on (the GL or GH terminal must also be connected to the R terminal). Terminal W (White) When this low voltage terminal is connected to the R terminal, and the unit is in the remote mode, first hydronic heat is attempted, and electric heat is switched on as backup (the GL or GH terminal must also be connected to the R terminal). This is subject to the configured heat modes available Terminal GL (Orange) When this low voltage terminal is connected to the R terminal, and the unit is in remote mode, the blower/ fan will be requested for operation on low speed. Terminal C (Black) Low voltage terminal, 24 VAC common, to provide opposite polarity voltage to wall thermostat. Figure 16 Thermostat Terminal Block R LS GH B Y W GL C 32

35 Control Board Figure 17 Control Board Physical Featrures U T S R Q P O N M L K J V W X I H G Y Z AA BB G F E A B C D KEY Fuse A TRANS TRNSFRMR/ LOW VLT B 24 VAC ACCESSORY C REMOTE THERMOSTAT D EGND ACCESSORY E DIP SWITCH 1 REMOTE ON/OFF WSHP ON/OFF F DIP SWITCH 2 RESTART ON/OFF FREEZE PROT ON/OFF GAS HEAT ON/OFF ELECTRIC HEAT ON/OFF HEAT PUMP ON/OFF G H I J K L M N O P Q R IR PLUG DISPLAY ODA- OUTDOOR AIR SENSOR IDC INDOOR COIL SENSOR RA RETURN AIR SENSOR ODC OUTDOOR COIL SENSOR NC NORMALLY CLOSED NO NORMALLY OPEN COND CONDENSER MOTOR REV REVERSING VALVE GAS GAS VALVE CNU EVAPORATOR MOTOR HI LO S L2(N2) T L2(N1) U L2(N3) V CNT TRANS/LINE VOLTAGE W FUSE X L1 Y HYD/GAS FAN SWITCH Z NO2 COMPRESSOR AA COM2 LINE 1 BB NO1 ELECTRIC HEATER CC COM1 LINE 1 An easily replaceable 6.3 Amp 250V fuse V is conveniently located on control board. COM 33