INSTALLATION INSTRUCTIONS

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1 2011 Lennox Industries Inc. Dallas, Texas, USA INSTALLATION INSTRUCTIONS 13HPP UNITS PACKAGED HEAT PUMP UNIT (2 5 TONS) /11 Supersedes 03/11 Litho U.S.A. RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE WARNING Improper installation, adjustment, alteration, service or maintenance can cause personal injury, loss of life, or damage to property. Installation and service must be performed by a licensed professional installer (or equivalent) or a service agency. WARNING If this unit is to be installed in a mobile or manufactured home application, the duct system must be sized to achieve static pressures within the manufacturer s guidelines. All other installation guidelines must also be followed. Failure to do so may result in equipment damage, personal injury and improper unit performance. WARNING Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies. TABLE OF CONTENTS Shipping and Packing List Unit Dimensions inches (mm) Parts Arrangement General Use of Unit as a Construction Heater or Air Conditioner Requirements Location Selection Rigging and Setting Unit Clearances Electrical Optional Electric Heat Existing Common Vent Systems Thermostat Condensate Drain Air Filters Supply and Return Duct Connections Compressors Blower Speed Settings and Performance Data Start Up System Operation Defrost System System Performance Maintenance Planned Service Shipping and Packing List 1 Assembled packaged heat pump unit As soon as the unit is received, it should be inspected for possible damage during transit. If you find any damage, immediately contact the last carrier. CAUTION Danger of sharp metallic edges. Can cause injury. Take care when servicing unit to avoid accidental contact with sharp edges. 06/11 Page

2 Unit Dimensions inches (mm) K G 1 5/8 (16) Supply F D J Supply Return G A Return F E F H B F BACK VIEW 5 1/2 (140) TOP VIEW 2 (51) 4 (102) Coil Access Panel L Condensate Drain 3/4 NPT C LEFT SIDE M N P Power Supply 1 1/8 (29) Low Voltage Entry 7/8 (22) Electric Heat Power Entry RIGHT SIDE Blower Access Panel Riggig Hole (8) Model No. 13HPP24A 13HPP30A 13HPP36A 13HPP42A 13HPP48A 13HPP60A A B C D E F G in mm in mm in mm in mm in mm in mm in mm 32 1/ / / / / / / / / / / / / Model No. 13HPP24A 13HPP30A 13HPP36A 13HPP42A 13HPP48A 13HPP60A H J K L M N P in mm in mm in mm in mm in mm in mm in mm / / / / / / / / / / / /2 394 Page 2

3 Parts Arrangement OUTDOOR FAN INDOOR COIL OUTDOOR COIL BLOWER GRILLE COMPRESSOR BLOWER MOTOR DEFROST CONTROL TRANSFORMER HEATER COVER (FOR OPTIONAL ELECTRIC HEAT) CAPACITOR CONTACTOR ELECTRIC HEAT SECTION (ORDERED SEPARATELY) Figure 1. Parts Arrangement General These installation instructions are intended as a general guide only, for use by an licensed professional installing contractor (or equivalent). The 13HPP units are single package heat pump units designed for outdoor installation on a rooftop or a slab. Electric heat sections are available for separate order. The unit must be sized based on heat loss and heat gain calculations made according to the methods of the Air Conditioning Contractors of America (ACCA). The units are shipped assembled. All piping, refrigerant charge and electrical wiring are factory installed and tested. The units require electric power, condensate drain and duct connections at the point of installation. Use of Unit as a Construction Heater or Air Conditioner Use of this unit as a construction heater or air conditioner is not recommended during any phase of construction. Very low return air temperatures, harmful vapors and operation of the unit with clogged or misplaced filters will damage the unit. If this unit has been used for heating or cooling of buildings or structures under construction, the following conditions must be met or the warranty will be void: A room thermostat must control the unit. The use of fixed jumpers that will provide continuous heating or cooling is not allowed. A pre filter must be installed at the entry to the return air duct. The return air duct must be provided and sealed to the unit. Return air temperature range between 55 F (13 C) and 80 F (27 C) must be maintained. Air filters must be replaced and pre filter must be removed upon construction completion. The unit components, duct system, air filters and evaporator coil must be thoroughly cleaned following final construction clean up. Page 3

4 The unit operating conditions (including airflow, cooling operation and heating operation) must be verified according to these installation instructions. Requirements These units must be installed in accordance with all applicable national and local safety codes. These instructions are intended as a general guide and do not supersede local codes in any way. Consult authorities having jurisdiction before installation. If components are to be added to a unit to meet local codes, they are to be installed at the dealer s and/or customer s expense. These units are design listed by ETL in both the United States and Canada as follows: For use as a heat pump unit. For outdoor installation only. For installation on combustible material. WARNING Product contains fiberglass wool. Disturbing the insulation in this product during installation, maintenance, or repair will expose you to fiberglass wool dust. Breathing this may cause lung cancer. (Fiberglass wool is known to the State of California to cause cancer.) Fiberglass wool may also cause respiratory, skin, and eye irritation. To reduce exposure to this substance or for further information, consult material safety data sheets available from address shown below, or contact your supervisor. Lennox Industries Inc. P.O. Box Dallas, TX Location Selection Use the following guidelines to select a suitable location for these units. 1. Unit is designed for outdoor installation only. Unit must be installed so all electrical components are protected from water. 2. Condenser coils must have an unlimited supply of air. 3. For ground level installation, use a level pre fabricated pad or use a level concrete slab with a minimum thickness of 3 inches. The length and width should be at least 6 inches greater than the unit base. Do not tie the slab to the building foundation. 4. Maintain level within a tolerance of 1/4 inch (6.35mm) maximum across the entire length or width of the unit. The heat pump unit foundation should be raised to a minimum of 3 inches (75mm) above finish grade. In areas which have prolonged periods of temperature below freezing and snowfall, the heat pump unit should be elevated above the average snow line. Extra precaution should be taken to allow free drainage of condensate from defrost cycles to prevent ice accumulation. The unit should not be located near walkways to prevent possible icing of surface from defrost condensate. Rigging and Setting Unit Exercise care when moving the unit. Do not remove any packaging until the unit is near the place of installation. Spreaders whose length exceeds the largest dimension across the unit MUST be used across the top of the unit. Units may also be moved or lifted with a forklift while still in the factory supplied packaging. NOTE Length of forks must be a minimum of 42 inches (1067mm). This unit is shipped with four corner brackets in place on the underside of the unit (see figure 2). The two rear corner brackets must be removed before unit is installed on a field provided roof curb assembly, provided curb is a split level design. NOTE Heat pumps are designed to drain water during the defrost cycle through holes in the base that are located under the outdoor coil. In downflow applications, proper clearances and/or drainage collection/management may be required at installation to ensure water does not enter structure. REAR CORNER BRACKET FRONT CORNER BRACKETS Return Supply REAR CORNER BRACKET FRONT CORNER BRACKET REMOVE REAR CORNER BRACKETS BEFORE INSTALLING ON ROOF CURB. LEAVE FRONT CORNER BRACKETS ON UNIT FOR SUPPORT. Figure 2. Corner Brackets CAUTION Before lifting a unit, make sure that the weight is distributed equally on the cables so that it will lift evenly. Units may also be moved or lifted with a forklift while still in the factory supplied packaging. Page 4

5 Clearances All units require certain clearances for proper operation and service. Refer to figure 3 for the clearances required for combustible construction, servicing, and proper unit operation. 24 (610) 24 (610) 24 (610) NOTE TOP CLEARANCE UNOBSTRUCTED MINIMUM 48" (1219) 0 (0) Low voltage control wiring are pigtail leads located on the main control box and are color coded to match the connection called out on the wiring schematic. Power supply to the unit must comply with all applicable codes and NEC or CEC. A fused disconnect switch should be field provided for the unit. The switch must be separate from all other circuits. If any of the wire supplied with the unit must be replaced, replacement wire must be of the type shown on the wiring diagram. Electrical wiring must be sized to carry minimum circuit ampacity marked on the unit. USE COPPER CONDUCTORS ONLY. Each unit must be wired with a separate branch circuit and be properly protected with a fuse or circuit breaker, see unit nameplate. WARNING Unit is equipped with a single pole contactor. Line voltage is present at all components when unit is not in operation. Disconnect all remote electric power supplies before opening access panel. Unit may have multiple power supplies. Failure to disconnect all power supplies could result in personal injury or death. Electrical Figure 3. Clearances Inches (MM) All wiring should be done in accordance with the current National Electric Code ANSI/NFPA No. 70 in the United States. In Canada, wiring must be done in accordance with the current CSA C22.2 Part 1. Local codes may take precedence. Use wiring with a temperature limitation of 75 C minimum. Run the 208 or 230 volt, 60 hertz electric power supply through a disconnect switch to unit control box and connect as shown in the wiring diagram located on the inside of the control access panel. Electric power supply must be properly protected with either a fuse or circuit breaker, see unit nameplate. Unit must be grounded with a separate ground conductor. See figure 4 for typical field wiring connection. The wiring diagram can be found on the unit inside the access panel. CAUTION When connecting electrical power and control wiring to the unit, waterproof type connectors MUST be used so that water or moisture cannot be drawn into the unit during normal operation. WARNING Unit must be grounded in accordance with national and local codes. Failure to ground unit properly can result in personal injury or death. See figure 4 for typical field wiring connections and figure 5 for typical unit wiring diagram. If the optional electric heat section is installed, the electric heat section requires a separate electrical power supply with a disconnect and is properly protected with either a fuse or circuit breaker. GROUND LUG FIELD SUPPLIED FUSED OR CIRCUIT BREAKER DISCONNECT CONTACTOR SINGLE PHASE POWER SUPPLY IF 208 VOLT IS SUPPLIED, TRANSFORMER CONNECTIONS MUST BE CHANGED. Figure /230 Line Voltage Wiring Page 5

6 Optional Electric Heat Optional electric heat is available and must be purchased separately. Install the electric heat section as outlined in the electric heat installation instruction included with heat section. Follow the basic steps listed below to install the electric heat section. Refer to the electric heat installation instruction for specific wiring/ heater configuration. 1. Disconnect the power and open the main control access. 2. Disconnect the plug separating the high voltage wire harness. Remove the high voltage wire harness plug and discard. 3. Remove the heater block cover by removing the four screws holding it in place. Cut away the insulation covering the opening, using the hole in the panel as a template. 4. Insert the heater into the control panel and fasten in the same mounting holes. 5. Plug the heater wiring harness into the wire harness on the control assembly. Field wiring of the auxiliary heater is separate from the unit power supply. Wire the power supply wiring for the heater to the appropriate connections on the heater kit. Table 1. Electric Heat Kits (208/240V 1ph) Heater Model Lennox Catalog Number 5 kw 40K65 7 kw 40K66 10 kw 40K67 15 kw 40K68 20 kw 40K69 Existing Common Vent Systems The 13HPP packaged heat pump may be used to replace an existing gas furnace which is being removed from a venting system commonly run with separate gas appliances. In this case, the existing vent system is likely to be too large to properly vent the remaining attached appliances. Conduct the following test while each appliance is operating and the other appliances (which are not operating) remain connected to the common venting system. If the venting system has been installed improperly, you must correct the system. 1. Seal any unused openings in the common venting system. 2. Inspect the venting system for proper size and horizontal pitch. Determine that there is no blockage, restriction, leakage, corrosion, or other deficiencies which could cause an unsafe condition. 3. Close all building doors and windows and all doors between the space in which the appliances remaining connected to the common venting system are located and other spaces of the building. Turn on clothes dryers and any appliances not connected to the common venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan. Close fireplace dampers. 4. Follow the lighting instructions. Turn on the appliance that is being inspected. Adjust the thermostat so that the appliance operates continuously. 5. After the main burner has operated for five minutes, test for leaks of flue gases at the draft hood relief opening. Use the flame of a match or candle. 6. After determining that each appliance connected to the common venting system is venting properly, (step 3) return all doors, widows, exhaust fans, fireplace dampers, and any other gas burning appliances to their previous mode of operation. 7. If a venting problem is found during any of the preceding tests, the common venting system must be modified to correct the problem. Resize the common venting system to the minimum vent pipe size determined by using the appropriate tables in Appendix G. (These are in the current standards of the National Fuel Gas Code ANSI-Z223.1/NFPA 54 in the USA, and the appropriate Category 1 Natural Gas and Propane appliances venting sizing tables in the current standards of the CSA B149 Natural Gas and Propane Installation Codes in Canada.) Thermostat The room thermostat should be located on an inside wall where it will not be subject to drafts, sun exposure or heat from electrical fixtures or appliances. Follow manufacturer s instructions enclosed with thermostat for general installation procedure. Color coded insulated wires (# 18 AWG) should be used to connect thermostat to unit. Page 6

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8 Condensate Drain The 13HPP unit is equipped with a 3/4 inch FPT coupling for condensate line connection. Plumbing must conform to local codes. Use a sealing compound on male pipe threads. MINIMUM PITCH 1 IN. (25 MM) PER 10 (3 M) OF LINE TYPICAL CONDENSATE DRAIN OPEN VENT Figure 5. Wiring Diagram Single Phase Air Filter UNIT An air filter is not factory supplied with the unit. A field provided air filter must always be in place during unit operation. Air filter sizes are shown in table 2. This unit is equipped with an internal air filter clip which is located in the indoor coil compartment attached to the side of the unit drain pan. Table 2. Unit Air Filter Sizes inches (mm) Unit Model Filter Size Filter Quantity 24, 30, in. (711) X 24 in. (610) x 1 in. (26) 1 42, 48, in. (762) X 30 in (762). x 1 in. (26) 1 Á Á TRAP MUST BE DEEP ENOUGH TO OFFSET MAXIMUM STATIC DIFFERENCE (GENERALLY, 3 INCHES MINIMUM). Figure 6. Typical Condensate Drain MOUNTING FRAME The drain line must be properly trapped and routed to a suitable drain. See figure 6 for proper drain arrangement. The drain line must pitch to an open drain or pump a minimum of 1 inch (25.4mm) per 10 feet (3048mm) to prevent clogging of the line. Seal around drain connection with suitable material to prevent air leakage into return air system. NOTE Drain line connection may not carry the weight of the unsupported drain line. Support the drain line, if necessary. NOTE Condensate must never drain on a rubberized roof. Drain piping should not be smaller than drain connection at coil. An open vent in drain line will some times be required due to line length, friction and static pressure. Drains should be constructed in a manner to facilitate future cleaning. NOTE The condensate drain line MUST be trapped to provide proper drainage. CAUTION Condensate line connection must be hand tightened. Do not use tools. Supply and Return Duct Connections The duct system should be designed and sized according to the methods in Manual Q of the Air Conditioning Contractors of America (ACCA). A closed return duct system shall be used. This shall not preclude use of economizers or outdoor fresh air intake. It is recommended that supply and return duct connections at the unit be made with flexible joints. The supply and return air duct systems should be designed for the CFM and static requirements of the job. They should NOT be sized by simply matching the dimensions of the duct connections on the unit. Ducting installed outdoors MUST be insulated and waterproofed. CAUTION When fastening duct system to side duct flanges on unit, insert screws through duct flanges only. Do not insert screws through casing. Outdoor duct must be insulated and waterproofed. Compressors Units are shipped with the compressor mountings factory adjusted and ready for operation. Unit compressors have internal protection. If there is an abnormal rise in the compressor temperature, the protector will open and the compressor will stop. CAUTION Do not loosen compressor mounting bolts. Page 8

9 Blower Speed Settings and Performance Data! WARNING Electric shock hazard. Can cause injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at disconnect switch(es). Unit may have multiple power supplies. Factory settings for the blower speed jumpers are given in the wiring diagram in figure 5. Use the following tables to External Static Pressure in. w.g. determine the correct air volume for operation in heat and cool mode. Tap Tap 1 Tap 2 Tap 3 Tap 4 and 5 Table 3. Motor Speed Tap Settings Purpose Fan Only Low Static Cooling High Static Cooling Table 4. 13HPP24A Blower Performance (Horizontal Airflow 1 ) Tap 1 (Fan Only) Tap 2 (Low Static Cooling) Air Volume at Specific Blower Taps (cfm) Tap 3 (High Static Cooling) Used for electric heat. Refer to heater label for proper selection. 2 Tap 4 2 Tap NOTE All air data measured external to unit with dry coil and less filter. 1 For downflow air volume, add 0.10 in. w.g. to duct static. 2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection External Static Pressure in. w.g. Table 5. 13HPP30A Blower Performance (Horizontal Airflow 1 ) Tap 1 (Fan Only) Tap 2 (Low Static Cooling) Air Volume at Specific Blower Taps (cfm) Tap 3 (High Static Cooling) 2 Tap 4 2 Tap NOTE All air data measured external to unit with dry coil and less filter. 1 For downflow air volume, add 0.10 in. w.g. to duct static. 2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection External Static Pressure in. w.g. Table 6. 13HPP36A Blower Performance (Horizontal Airflow 1 ) Tap 1 (Fan Only) Tap 2 (Low Static Cooling) Air Volume at Specific Blower Taps (cfm) Tap 3 (High Static Cooling) 2 Tap 4 2 Tap Page 9

10 NOTE All air data measured external to unit with dry coil and less filter. 1 For downflow air volume, add 0.10 in. w.g. to duct static. 2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection Page 10

11 External Static Pressure in. w.g. Table 7. 13HPP42A Blower Performance (Horizontal Airflow 1 ) Tap 1 (Fan Only) Tap 2 (Low Static Cooling) Air Volume at Specific Blower Taps (cfm) Tap 3 (High Static Cooling) 2 Tap 4 2 Tap NOTE All air data measured external to unit with dry coil and less filter. 1 For downflow air volume, add 0.10 in. w.g. to duct static. 2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection External Static Pressure in. w.g. Table 8. 13HPP48A Blower Performance (Horizontal Airflow 1 ) Tap 1 (Fan Only) Tap 2 (Low Static Cooling) Air Volume at Specific Blower Taps (cfm) Tap 3 (High Static Cooling) 2 Tap 4 2 Tap NOTE All air data measured external to unit with dry coil and less filter. 1 For downflow air volume, add 0.10 in. w.g. to duct static. 2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection External Static Pressure in. w.g. Table 9. 13HPP60A Blower Performance (Horizontal Airflow 1 ) Tap 1 (Fan Only) Tap 2 (Low Static Cooling) Air Volume at Specific Blower Taps (cfm) Tap 3 (High Static Cooling) 2 Tap 4 2 Tap NOTE All air data measured external to unit with dry coil and less filter. 1 For downflow air volume, add 0.10 in. w.g. to duct static. 2 Taps 4 and 5 are used with Optional Electric Heat. Refer to Electric Heat nameplate for proper heat tap selection Page 11

12 Start Up The cooling section is a complete factory package utilizing an air cooled condenser. The system is factory charged with HFC 410A refrigerant. PRE START CHECKLIST: 1. Make sure refrigerant lines do not rub against the cabinet or each other. 2. Inspect all electrical wiring, both factory and field installed, for loose connections. 3. Check voltage at the disconnect switch. Voltage must be within the range listed on the unit nameplate. If not, consult power company and have voltage condition corrected before starting unit. 4. Recheck voltage with unit running. If power is not within the range listed on the unit nameplate, stop the unit and consult the power company. Check unit amperage. Refer to unit nameplate for correct running amps. 5. Make sure filter is in place before unit start up. COOLING SEQUENCE OF OPERATION When the thermostat is in the cooling mode, the O circuit is powered which energizes the reversing valve. Upon cooling demand, the thermostat closes circuit R and Y to close the unit contactor and start the compressor and outdoor fan. The thermostat automatically closes R to G circuit at the same time. This brings on the indoor blower at the selected cooling fan speed. Upon satisfying cooling demand, the thermostat will open the above circuits and open the main contactor, stopping the compressor and outdoor fan. If the unit is equipped with a delay timer, the indoor blower will continue to operate for 90 seconds which improves system efficiency. HEATING SEQUENCE OF OPERATION Upon heating demand, the thermostat closes circuit R to Y, which closes the unit contactor, starting the compressor and outdoor fan. The reversing valve is not energized in the heating mode. The thermostat again automatically brings on the indoor fan at the selected heating speed at the same time. Upon satisfying heating demand, the thermostat opens above circuits and stops unit operation. System Operation UNIT COMPONENTS The outdoor unit and indoor blower cycle on demand from the room thermostat. If the thermostat blower switch is in the ON position, the indoor blower operates continuously in the selected continuous blower speed. Bi Flow Liquid line Filter Drier The unit is equipped with a large capacity bi flow filter drier which keeps the system clean and dry. If replacement is necessary, order another of the same design and capacity. The replacement filter drier must be suitable for use with HFC 410A refrigerant. Low Pressure Switch The 13HPP is equipped with an auto reset low pressure switch which is located on the vapor line. The switch shuts off the compressor when the vapor pressure falls below the factory setting. This switch, which is ignored during defrost operation, closes at pressures at or above psig ( kpa) and opens at psig ( kpa). It is not adjustable. High Pressure Switch The 13HPP is equipped with an auto-reset high pressure switch (single pole, single throw) which is located on the liquid line. The switch shuts off the compressor when discharge pressure rises above the factory setting. The switch is normally closed and is permanently adjusted to trip (open) at psig ( kpa). Defrost Thermostat The defrost thermostat is located on the liquid line between the check/expansion valve and the distributor. When defrost thermostat senses 42 F (5.5 C) or cooler, the thermostat contacts close and send a signal to the defrost control to start the defrost timing. It also terminates defrost when the liquid line warms up to 70 F (21 C). Page 12

13 Defrost System The defrost system includes a defrost thermostat (S6) and a defrost control (CMC1). DEFROST CONTROL This defrost control includes the combined functions of a time/temperature defrost control, defrost relay, time delay, diagnostic LEDs, and a terminal strip for field wiring connections. DEFROST TIMING PINS (P1) TEST PINS COMPRESSOR DELAY PINS REVERSING VALVE S87 LOW PRESSURE SWITCH DEFROST THERMOSTAT (S6) S4 HIGH PRESSURE SWITCH Figure 7. Defrost Control (CMC1) DIAGNOSTIC LEDS 24V TERMINAL STRIP CONNECTIONS SERVICE LIGHT CONNECTIONS The defrost control provides automatic switching from normal heating operation to defrost mode and back. When the defrost thermostat is closed, the control accumulates compressor run time at 30, 60 or 90 minute field adjustable intervals. When the selected compressor run time interval is reached, the defrost relay is energized and defrost begins. Defrost Control Timing Pins (P1) Each timing pin selection provides a different accumulated compressor run time period for one defrost cycle. This time period must occur before a defrost cycle is initiated. The defrost interval can be adjusted to 30 (T1), 60 (T2), or 90 (T3) minutes (see figure 24). The maximum defrost period is 14 minutes and cannot be adjusted. NOTE Defrost control part number is listed near the P1 timing pins. Units with defrost control : Factory default is 60 minutes Units with defrost control : Factory default is 90 minutes If the timing selector jumper is missing, the defrost control defaults to a 90 minute defrost interval. Compressor Delay (P5) The defrost control has a field selectable function to reduce occasional sounds that may occur while the unit is cycling in and out of the defrost mode. Units with defrost control : The compressor will be cycled off for 30 seconds going in and out of the defrost mode when the compressor delay jumper is removed. Units with defrost control : The compressor will be cycled off for 30 seconds going in and out of the defrost mode when the compressor delay jumper is installed. NOTE The 30 second compressor feature is ignored when the jumper is installed on TEST pins. Time Delay The timed off delay is five minutes long. The delay helps protect the compressor from short cycling in case the power to the unit is interrupted or a pressure switch opens. The delay is bypassed by placing the timer select jumper across the TEST pins for 0.5 seconds. NOTE The defrost control must have a thermostat demand for the bypass function. Test Mode (P1 TEST) A TEST option is provided for troubleshooting. The TEST mode may be started any time the unit is in the heating mode and the defrost thermostat is closed or jumpered. If the jumper is in the TEST position at power up, the control will ignore the test pins. When the jumper is placed across the TEST pins for two seconds, the control will enter the defrost mode. If the jumper is removed before an additional 5 second period has elapsed (7 seconds total), the unit will remain in defrost mode until the defrost thermostat opens or 14 minutes have passed. If the jumper is not removed until after the additional 5 second period has elapsed, the defrost will terminate and the test option will not function again until the jumper is removed and re applied. Diagnostic LEDs (DS1 and DS2) The defrost control uses two LEDs for diagnostics. The LEDs flash a specific sequence according to the diagnosis (table 10). Table 10. Defrost Control Diagnostic LEDs DS2 Green DS1 Red Condition OFF OFF Power problem Simultaneous Slow Flash Normal operation Alternating Slow Flash 5 minute anti short cycle delay OFF Slow Flash Low Pressure Fault OFF ON Low Pressure Lockout Slow Flash OFF High Pressure Fault ON OFF High Pressure Lockout Page 13

14 System Performance This equipment is a self contained, factory optimized using check expansion valve metered refrigerant system, and should require no adjustments when properly installed. If however unit Ensure unit is installed per manufacturer s instructions and that line voltage and air flows are correct. Refer to table 10 for proper superheat values. Check superheat settings by measuring pressure at the suction line service port. Measure pressure at the liquid service port. Take line temperature within 2 inches of service port connection to its main tube. If unit superheat subcooling varies by more than table allowance, check internal seals, service panels and duct work for air leaks, as well as restrictions and blower speed settings. If unit performance remains questionable, remove charge, evacuate to 500 microns, and weigh in refrigerant to name plate charge. It is critical that the exact charge is re installed. Failure to comply will compromise system performance. If unit performance is still questionable, check for refrigerant related problems such as, blocked coil or circuits, malfunctioning metering devices or other system components. 80 F db / 67 F wb RETURN AIR Table 11. Suction Superheat Values Unit Model No. 13HPP24 13HPP30 13HPP36 13HPP42 13HPP48 13HPP60 Table 12. Normal Operating Pressures (Cooling) Suction Superheat +/ 3 82 F OD / 80 F IDDB / 67 F IDWB 17 F 20 F 16 F 17 F 19 F 19 F Verify system performance using table 12 as a general guide. Table 12 should not be used for charging unit. Minor variations in these pressures may be expected due to differences in installations. Significant differences could mean that the system is not properly charged or that a problem exists with some component in the system. Used carefully, this table could serve as a useful service guide. Data is based on 80 F dry bulb / 67 F wet bulb return air. Allow unit operation to stabilize before taking pressure readings. Air Temperature Entering Outdoor Coil ( F) UNIT PRESSURE HPP HPP HPP Vapor 13HPP HPP HPP HPP HPP HPP Liquid 13HPP HPP HPP F RETURN AIR Table 13. Normal Operating Pressures (Heating) Air Temperature Entering Outdoor Coil ( F) UNIT PRESSURE HPP HPP HPP Vapor 13HPP HPP HPP HPP HPP HPP Liquid 13HPP HPP HPP Page 14

15 Maintenance At the start of each cooling season, this equipment should be serviced by a licensed professional technician (or equivalent). Periodic inspection and maintenance normally consists of changing or cleaning filters. CONDENSER FAN CLEARANCES The hub of the condenser fan blade should be flush with the end of the motor shaft to ensure proper clearances and performance. This dimension should be checked and the fan should be adjusted accordingly any time servicing of the outdoor fan system is required. AIR FILTER Visually inspect vent outlet periodically to make sure that the there is no buildup of soot and dirt. If necessary, clean to maintain adequate opening to discharge flue products. Motors Indoor, outdoor fan and vent motors are permanently lubricated and require no further lubrication. Motors should be cleaned yearly to prevent the accumulation of dust and dirt on the windings or motor exterior. COIL Dirt and debris should not be allowed to accumulate on the coil surfaces or other parts in the air conditioning circuit. Cleaning should be performed as often as necessary. Use a brush, vacuum cleaner attachment, or other suitable means. If water is used to clean the coil, be sure the power to unit is shut off prior to cleaning. NOTE Care should be used when cleaning the coil so that the coil fins are not damaged. Do not permit the hot condenser air discharge to be obstructed by overhanging structures or shrubs. Planned Service and (under some conditions) cleaning the main burners You should expect a service technician to check the following items during an annual inspection. Power to the unit must be shut off for the service technician s safety. Fresh air grilles and louvers Must be open and unobstructed to provide air. Unit appearance must be inspected for: A Rust, dirt or signs of water B Burnt or damage wires C Burnt or damage components. A good coat of auto wax can enhance the appearance of the cabinet. Blower access door must be properly in place. Return air duct must be properly attached and must provide an air seal to the unit. Operating performance Unit must be observed during operation to monitor proper performance of the unit and the vent system. Problems detected during the inspection may make it necessary to temporarily shut down the unit until the items can be repaired or replaced. Pay attention to your unit. Situations can arise between annual unit inspections that may result in unsafe operation. Page 15

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