INSTALLATION INSTRUCTIONS 036, 042, 048, 060, & 072 LGA/LCA/LGC/LCC

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1 Litho U.S.A WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a qualified installer, service agency or the gas supplier INSTALLATION INSTRUCTIONS LGA/LCA/LGC/LCC 036, 042, 048, 060, & 072 (3, 3 1/2, 4, 5, & 6 TON) L SERIES PACKAGED UNITS 505,147M 1/2006 Supersedes 505,129M Table of Contents Dimensions Parts Arrangements Shipping And Packing List General Unit Support Duct Connection Condensate Drains Connect Gas Piping Pressure Test Gas Piping Factory Installed Options Electrical Connections Blower Operation and Adjustments Cooling Start Up Heating Start Up Heating Operation and Adjustments Humiditrol Start Up and Operation Service RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE LGA SHOWN 01/06 505,147M

2 LGA/LCA/LGC/LCC Unit Dimensions Inches (mm) OPTIONAL OUTDOOR AIR HOOD (Factory or Field Installed) *Reheat coils are factory installed in Humiditrol units only. CONDENSER COIL INTAKE AIR CONDENSER COIL 4-1/2 (114) BOTTOM RETURN AIR OPENING 4-1/2 (114) EVAPORATOR COIL REHEAT COIL* CENTER OF GRAVITY CONDENSER COIL INTAKE AIR 4-1/2 (114) 46-1/2 (1181) Base 4-1/2 (114) 14 (356) 28 (711) 6-1/8 (156) BOTTOM POWER ENTRY 5 x 8 (127 x 203) 14 (356) 28 (711) BOTTOM SUPPLY AIR OPENING BLOWER 4-1/2 (114) BLOWER MOTOR HEAT EXCHANGER (Optional electric heat in LCA/LCC units) TOP VIEW 87-1/2 (2223) Base TOP VIEW BASE SECTION OPTIONAL DISCONNECT / CIRCUIT BREAKER *ELECTRICAL INLET (High Voltage) 86 (2184) FLUE/VENT OUTLET CONTROL BOX HORIZONTAL SUPPLY AIR OPENING BLOWER 14 (356) 33-1/4 (845) CONDENSER COIL 36-1/2 (927) 28 (711) 14 (356) 14 (356) 28 (711) 32-1/4 (819) OPTIONAL *ELECTRICAL INLET115 VOLT OUTLET (Low Voltage) (Factory Installed) GAS INLET *When Factory Installed Disconnect is Not Used. FRONT VIEW COMPRESSOR COMBUSTION AIR INTAKE 3-1/4 (83) LIFTING HOLES (For Rigging Both Sides) FORKLIFT SLOTS (Front, Back & Blower End) BACK VIEW HORIZONTAL RETURN AIR OPENING OPTIONAL OUTDOOR AIR HOOD (Factory or Field Installed) OUTDOOR AIR OPTIONAL GRAVITY EXHAUST HOOD (Field Installed) OPTIONAL GRAVITY EXHAUST DAMPERS (Factory or Field Installed) OPTIONAL ECONOMIZER DAMPERS Or OUTDOOR AIR DAMPERS (Factory or Field Installed) 15 (381) EXHAUST AIR 1/4 (6) 45 (1143) FILTERS REHEAT COIL* 24-3/4 (629) EVAPORATOR COIL BLOWER 4 (102) 5-1/8 (130) CONDENSATE DRAIN END VIEW (Economizer/Outdoor Air Dampers) OPTIONAL ECONOMIZER DAMPERS (Factory or Field Installed) FLUE/VENT OUTLET OPTIONAL OUTDOOR AIR HOOD (Factory or Field Installed) OPTIONAL POWER EXHAUST FAN (Field Installed) Down flow Applications Only COMBUSTION AIR INTAKE EXHAUST AIR OUTDOOR AIR 31-1/2 (800) 15 (381) 45 (1143) FILTERS REHEAT COIL* 24-1/4 (616) EVAPORATOR COIL BLOWER 5-1/8 (130) CONDENSATE DRAIN END VIEW (Power Exhaust) FIGURE 1 Page 1

3 LGA/LCA/LGC/LCC Parts Arrangement LGA/LGC HEAT EXCHANGER REHEAT COIL (HUMIDITROL UNITS ONLY) CONDENSER FAN EVAPORATOR COIL FILTERS ECONOMIZER (OPTIONAL) COMPRESSOR CONDENSATE DRAIN DISCONNECT OR CIRCUIT BREAKER (OPTIONAL) 120V GFI OUTLET (OPTIONAL) TB1 BLOWER BURNERS GAS VALVE COMBUSTION AIR INDUCER LCA/LCC REHEAT COIL (HUMIDITROL UNITS ONLY) CONDENSER FAN EVAPORATOR COIL FILTERS ECONOMIZER (OPTIONAL) COMPRESSOR CONDENSATE DRAIN DISCONNECT OR CIRCUIT BREAKER (OPTIONAL) 120V GFI OUTLET (OPTIONAL) TB1 FIGURE 2 BLOWER ELECTRIC HEAT (OPTIONAL) Page 2

4 Shipping and Packing List Package 1 of 1 contains: 1 Assembled unit IMPORTANT Humiditrol units require a specific field provided and installed humidity sensor. Check unit for shipping damage. Consult last carrier immediately if damage is found. General These instructions are intended as a general guide and do not supersede national or local codes in any way. Authorities having jurisdiction should be consulted before installation. In addition to standard heating and cooling, LGA/LCA036, 048, 060 and LGC/LCC072 Humiditrol units provide a dehumidifying mode of operation. Refer to Reheat Operation section. The LGA/LCA060H unit is available using R 410A, an ozone friendly HFC refrigerant. Refer to the Cooling Start Up section for precautions when installing unit. See figure 1 for unit dimensions, figure 2 for parts arrangement and figure 3 for service clearances. SERVICE CLEARANCES ÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉ 36" ÉÉÉÉÉÉÉÉÉ ÉÉÉÉ ÉÉÉÉÉ ÉÉÉÉ ÉÉÉÉÉ EVAP. ÉÉÉÉ 36" HEAT COND. ÉÉÉÉÉ 36" SEC- FAN ÉÉÉÉ BLOWER TION ÉÉÉÉÉ ÉÉÉÉ ÉÉÉÉÉ COMP. ÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉ 36" ÉÉÉÉÉÉÉÉÉ FIGURE 3 IMPORTANT The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFC s and HCFC s) as of July 1, Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incarceration may be levied for non compliance. WARNING Electric shock hazard and danger of explosion. Can cause injury, death or product or property damage. Turn off gas and electrical power to unit before performing any maintenance or servicing operations on the unit. Follow lighting instructions attached to unit when putting unit back into operation and after service or maintenance. CAUTION Danger of sharp metallic edges. Can cause injury. Take care when servicing unit to avoid accidental contact with sharp edges. 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: The vent hood must be installed per these installation instructions. 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 filters must be removed upon construction completion. The input rate and temperature rise must be set per the unit rating plate. The heat exchanger, components, duct system, air filters and evaporator coil must be thoroughly cleaned following final construction clean up. The unit operating conditions (including airflow, cooling operation, ignition, input rate, temperature rise and venting) must be verified according to these installation instructions. Page 3

5 Unit Support A Roof Mounting with LARMF Downflow 1 The LARMF roof mounting frame must be installed, flashed and sealed in accordance with the instructions provided with the frame. 2 The LARMF roof mounting frame should be square and level to 1/16" per linear foot (5mm per linear meter) in any direction. 3 Duct must be attached to the roof mounting frame and not to the unit: Supply and return plenums must be installed before setting the unit. B Roof Mounting With Installer s Frame Downflow Many types of roof frames can be used to mount the unit, depending upon different roof structures. Items to keep in mind when using the building frame or supports are: 1 The base is fully enclosed and insulated, so an enclosed frame is not required. 2 The frames or supports must be constructed with non combustible materials and should be square and level to 1/16" per linear foot (5mm per linear meter) in any direction. 3 Frame or supports must be high enough to prevent any form of moisture from entering unit. Recommended frame height is 14" (356mm). 4 Duct must be attached to the roof mounting frame and not to the unit: Supply and return plenums must be installed before setting the unit. 5 Units require support along all four sides of unit base. Supports must be constructed of steel or suitably treated wood materials. NOTE When installing the unit on a combustible surface for downflow discharge applications, the LARMF roof mounting frame is required. C Horizontal Discharge Applications c Remove horizontal supply air cover from rear heat section panel. Cut insulation to match horizontal supply air opening. Use foil tape to secure cut edges of insulation to supply air opening. Secure horizontal supply air cover over downflow supply air opening. Replace rear heat section panel. 4 Units require support along all four sides of unit base. Supports must be constructed of steel or suitably treated wood materials. NOTE Securely fasten roof frame to roof per local codes. Duct Connection All exterior ducts, joints, openings in roof or building walls must be insulated and weather proofed with flashing and sealing compounds in accordance with applicable codes. Any duct passing through an unconditioned space must be insulated. CAUTION In downflow applications, do not drill or punch holes in base of unit. Leaking in roof may occur if unit base is punctured. Condensate Drains Remove cap and make drain connection to the 3/4" N.P.T. drain nipple provided on unit. A trap must be installed between drain connection and an open vent for proper condensate removal. See figure 4. It is sometimes acceptable to drain condensate onto the roof or grade; however, a tee should be fitted to the trap to direct condensate downward. The condensate line must be vented. Check local codes concerning condensate disposal. Refer to figures 1 and 2 for condensate drain location. CONDENSATE DRAIN CONNECTION CAULK AROUND CONDENSATE COUPLING 1 Specified installation clearances must be maintained when mounting units. Refer to figure 3. 2 Top of support slab should be at least 4" (102mm) above the finished grade and located so no run off water from higher ground can collect around the unit. 3 Units are shipped in downflow position. Convert to horizontal discharge as follows: a Remove horizontal return air cover and rear heat section panel. b Secure horizontal return air cover over downflow return air opening. Page 4 Minimum Pitch 1" (25 mm) per 10 (3 m) of line Á Á Á Á OPEN VENT MOUNTING FRAME FIGURE 4 UNIT

6 Connect Gas Piping Before connecting piping, check with gas company or authorities having jurisdiction for local code requirements. When installing gas supply piping, length of run from gas meter must be considered in determining pipe size for 0.5" w.c. maximum pressure drop. Do not use supply pipe smaller than unit gas connection. For natural gas units, operating pressure at the unit gas connection must be a minimum of 4.5" w.c. and a maximum of 10.5" w.c. For propane gas units, operating pressure at the unit gas connection must be a minimum of 11" w.c. and a maximum of 13.0" w.c. When making piping connections, a drip leg should be installed on vertical pipe runs to serve as a trap for sediment or condensate. A 1/8" N.P.T. plugged tap is located on gas valve for test gauge connection. Refer to Heating Start Up section for tap location. Install a ground joint union between the gas control manifold and the main manual shut off valve. See figure 5. Compounds used on threaded joints of gas piping shall be resistant to the action of liquified petroleum gases. MANUAL MAIN SHUT OFF VALVE (REFER TO LOCAL CODES) GAS PIPE CONNECTION GROUND JOINT UNION GAS PIPING SUPPORT FIGURE 5 Pressure Test Gas Piping UNIT SUPPORT DRIP LEG UNIT When pressure testing gas lines, the gas valve must be disconnected and isolated. Gas valves can be damaged if subjected to more than 0.5 (14" w.c.). See figure 6. If the test pressure is equal to or less than 0.5 (14" w.c.), use the main manual shut off valve before pressure testing to isolate the unit from the gas supply system. If necessary, adjust main gas supply pressure in accordance with Connect Gas Pipe" section. PRESSURE TEST GAS LINE GAS VALVE MANUAL MAIN SHUT OFF VALVE FIGURE 6 CAP CAUTION Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly after leak test has been completed. Do not use matches, candles, flame or othe sources of ignition to check for gas leaks. NOTE Codes may require that manual main shut off valve and union (furnished by installer) be installed in gas line external to unit. Union must be of the ground joint type. After all connections have been made, check all piping connections for gas leaks. Also check existing gas connections up to the gas valve; loosening may occur during installation. Use a leak detection solution or other preferred means. Do not use matches candles or other sources of ignition to check for gas leaks. NOTE In case emergency shut down is required, turn off the main manual shut off valve and disconnect main power to unit. These devices should be properly labeled by the installer. High Altitude Derate Units must be derated when installed at altitudes above 4500 feet (610 m) above sea level. At altitudes above 4500 feet (610 m), units must be derated to match the gas manifold pressures shown in table 1. NOTE-This is the only permissible derate for these units. TABLE 1 Altitude ft. (m) Gas Manifold Pressure in. w.g. (kpa) Natural LP (Propane) ( ) 3.4 (0.85) 10.2 (2.54) ( ) 3.3 (0.82) 9.8 (2.44) ( ) 3.2 (0.80) 9.5 (2.36) Page 5

7 Factory Installed Options A Economizer The A56 EM1 economizer board controls economizer operation and provides potentiometers to control minimum damper position and enthalpy control adjustments. The economizer board is positioned on the A55 M1 main control board in the unit control box. See the Integrated Modular Control Guide for economizer operation and adjustments. Intake hood parts and supply air filters are shipped in the filter section. Remove intake hood package from filter channels. Remove filters from unit and slide into filter channels. If the filters have a metal frame, remove the cardboard shipping pad protecting the evaporator coil. B Intake Hood The intake hood top panel is secured to the unit. The intake hood sides, filters, and three support brackets are shipped unassembled in the filter compartment. Assemble hood and install as follows: 1 Remove screws securing side flanges of top hood to unit. See figure 7. 2 Pivot top hood open and secure sides of intake hood to top of hood using three sheet metal screws on each side. See figure 7. 3 Align two holes on intake hood side panel with two holes on bottom filter bracket. See figure 8. Secure both sides of bottom filter bracket to hood sides with sheet metal screws. 4 Secure intake hood sides to unit. 5 Secure top filter bracket to hood top flange as shown in figure 8. Slide filter into flanges and install spacers on either side of filter. HOOD SIDE VIEW HOOD TOP SEAL HOOD TOP INTAKE HOOD TOP SEAL NOTE: CAULK EACH SIDE OF TOP SEAL (FIELD PRO- VIDED) HOOD TOP FILTER TOP FILTER BRACKET UNIT HOOD SIDE HOOD TOP ALIGN VERTICAL HOLES ON BRACKET WITH VERTICAL HOLES ON SIDE OF HOOD BOTTOM FILTER BRACKET FIGURE 8 FIGURE 7 Page 6

8 Electrical Connections Power Supply Do not apply power or close disconnect switch until installation is complete. Refer to start up directions. Refer closely to unit wiring diagram. Refer to unit nameplate for minimum circuit ampacity and maximum overcurrent protection. 1 All units are factory wired. For 208V supply, disconnect the pink wire labeled T1 Line or 240" from the control transformer. Connect the pink wire to transformer terminal labelled 208". Units Without Optional Disconnect 1 The unit is provided with power entry knockouts through the base and the blower section mullion (see page 1). 2 Horizontal Power Entry Remove necessary electrical knockouts on blower section mullion. Bottom Power Entry Route wires through knockout on power entry cover. NOTE It may be necessary to punch larger holes for power wiring (refer to current NEC/CEC requirements). 3 Install adequate disconnect switch external to unit in accordance with local or national codes as applicable. Units With Factory Installed GFI 1 Remove necessary electrical knockouts in unit. 2 Make power wiring connections in bottom power entry box. 3 Connect separate 120v wiring to GFCI outlet pigtails in handybox on front left corner mullion. Electrical Connections Control Wiring A Thermostat Location Room thermostat mounts vertically on any non conductive flat surface. Locate thermostat approximately 5 feet (1.5m) above the floor in an area with good air circulation at average temperature. Avoid locating the room thermostat where it might be affected by: drafts or dead spots behind doors and in corners hot or cold air from ducts radiant heat from sun or units concealed pipes and chimneys B Wire Routing Route thermostat cable or wires from subbase through knockout provided in unit. Use 18 AWG wire for all applications using remotely installed electro mechanical and electronic thermostats. On Humiditrol Units, route wires from RH sensor or remote switch through knockout provided in unit. For sensor installations, use 22AWG stranded, two twisted pairs, individually shielded, 100% aluminum shield with drain wire and Teflon jacket. IMPORTANT Unless field thermostat wires are rated for maximum unit voltage, they must be routed away from line voltage wiring. C Wire Connections This unit is equipped with a series of integrated modular control (IMC) boards which control unit function. Refer to the IMC manual provided with each unit. The IMC will operate the unit from a thermostat or zone sensor based on the System Mode selected in ECTO The default System Mode (option 0) is the thermostat mode. 1 Default Thermostat Mode ECTO 6.01 Option 0 The IMC will operate two stages of heating and cooling based on thermostat demands. Install thermostat assembly in accordance with instructions provided with thermostat. See figure 9 for field wiring and and refer to wiring diagrams on unit. 24 VOLT FIELD WIRING IN THERMOSTAT MODE (IMC in default T Stat System Mode 6.01 Option 0) A2 (2 HT / 2CL) THERMOSTAT Not all terminals are provided on all thermostats. Remove the jumper when a Network Control Panel (NCP) is installed. Jumper 8 & 9 when thermostat has no night setback terminals; unit will operate in occupied mode. Note On electro mechanical thermostats set anticipator at 0.1 amps. TB FIGURE 9 IMPORTANT Terminal connections at the wall plate or subbase must be made securely. Loose control wire connections may result in intermittent operation Install optional A42 phase monitor and/or S42 overload relay switch. Page 7

9 2 Zone Sensor Mode ECTO 6.01 Option 1, 2, or 3 The IMC will operate heating and cooling based on the IMC internal setpoints and the temperature from the A2 zone sensor. An optional Network Control Panel (NCP) can also be used to provide setpoints. A thermostat or return air sensor can be used as a back up mode. Refer to the IMC manual provided with each unit to change ECTO options. See figure 10 for field wiring. 24 VOLT FIELD WIRING IN ZONE SENSOR MODE (IMC in Zone Sensor Mode ECTO 6.01 option 1, 2, 3) A2 SENSOR TB D Humiditrol Units Only Install humidity sensor in accordance with instructions provided with sensor. A DDC input may be used to initiate dehumidification instead of a sensor. Make wiring connections as shown in figure 9 for Thermostat Mode and figure 10 for Zone Sensor Mode. In addition, connect either a zone sensor or a dehumidification input as shown in figure VOLT FIELD WIRING HUMIDITROL UNITS Connect EITHER an A91 sensor or a remote digital input to TB1 A91 HUMIDITY SENSOR VIN GND VOUT Connect shield drain to unit TB1 7 not RH sensor. TB FIGURE 10 Note Install sensor and make communication wiring connections as shown in literature provided with sensor. ENERGY MANAGE- MENT SYSTEM DEHUMIDIFICATION SWITCH One wire of the two pairs is not connected. FIGURE Page 8

10 Blower Operation and Adjustments A Blower Operation 1 Blower operation is manually set at the thermostat subbase fan switch. With fan switch in ON position, blowers will operate continuously. 2 With fan switch in AUTO position, the blower will cycle with demand. Blower and entire unit will be off when system switch is in OFF position. B Determining Unit CFM 1 The following measurements must be made with a dry indoor coil. Run blower without a cooling demand. Air filters must be in place when measurements are taken. 2 Measure static pressure external to unit (from supply to return). TABLE 2 MINIMUM AND MAXIMUM PULLEY ADJUSTMENT Belt Minimum Turns Open Maximum Turns Open A Section 0 5 B Section 1* 6 *0 Minimum turns open when B belt is used on pulleys 6" O.D. or larger. BLOWER SPEED TAP SELECTION DIRECT DRIVE UNITS BLOWER MOTOR HARNESS CONNECTOR Belt Drive Blowers 3 Measure the indoor blower wheel RPM. 4 Refer to unit nameplate to determine the blower motor horse power. 5 Referring to table 3 or 4, use the static pressure and RPM readings to determine unit CFM. 6 The CFM can be adjusted at the motor pulley (see section C Blower Belt Adjustment). Direct Drive Blowers 7 Referring to tables 5, 6, or 7, use the static pressure and blower speed tap to determine unit CFM. DEPRESS TAB TO RELEASE WIRE CONNECTOR. SELECT CONNECTOR LOCATION FOR NEW SPEED. INSERT WIRE UN- TIL IT CLICKS. FIGURE 12 BLOWER SPEED ADJUSTMENT TO INCREASE BELT TENSION 1 Loosen 2 locking bolts. 2 Pull motor mounting plate. 3 Tighten motor mounting plate so plate is vertical. 8 The CFM can be adjusted at the motor (see figure 12 and unit wiring diagrams for blower speed adjustment). SET SCREW MOTOR MOUNTING PLATE C Blower Belt Adjustment KEY To increase blower CFM loosen set screw and turn pulley clockwise. See figure 13. To decrease CFM turn pulley counterclockwise. Do not exceed minimum and maximum number of pulley turns as shown in table 2. MOTOR & PULLEY BELT BLOWER WHEEL LOCKING BOLTS TO INCREASE CFM LOOSEN ALLEN SCREW & TURN PULLEY CLOCKWISE FIGURE 13 TO DECREASE CFM TURN PULLEY COUNTERCLOCKWISE Page 9

11 Maximum life and wear can be obtained from belts only if proper pulley alignment and belt tension are maintained. Make sure blower and motor pulley are aligned as shown in figure 14. Important Tension new belt after a hour period of operation. This will allow belts to stretch and seat grooves. To increase belt tension, loosen 2 locking bolts and pull mounting plate. Tighten motor mounting plate in vertical position. See figure 13. PULLEY ALIGNMENT ALIGNED Overtensioning belts shortens belt and bearing life. Check belt tension as follows: 1 Measure span length X. See figure Apply perpendicular force to center of span (X) with enough pressure to deflect belt 1/64" for every inch of span length or 1.5mm per 100mm of span length. Example: Deflection distance of a 40" span would be 40/64" or 5/8". Example: Deflection distance of a 400mm span would be 6mm. 3 Measure belt deflection force. For a used belt, the deflection force should be 5 lbs. (35kPa). A new belt deflection force should be 7 lbs. (48kPa). BLOWER PULLEY BELT MOTOR PULLEY A force below these values indicates an undertensioned belt. A force above these values indicates an overtensioned belt. MEASURE BELT TENSION NOT ALIGNED FORCE FIGURE 14 DEFLECTION 1/64" PER INCH OF SPAN OR 1.5mm PER 100mm OF SPAN FIGURE 15 Page 10

12 TABLE 3 LGA/LGC BELT DRIVE BLOWER PERFORMANCE Air TOTAL STATIC PRESSURE Inches Water Gauge (Pa) Vol- ume.00 (00).20 (50).40 (100).60 (150).80 (200) 1.00 (250) 1.20 (300) 1.40 (350) 1.60 (400) 1.80 (450) cfm RPM BHP RPM BHP (L/s) (kw) (kw) RPM (kw) BHP RPM (kw) BHP RPM (kw) BHP RPM (kw) BHP RPM (kw) BHP RPM (kw) BHP RPM (kw) BHP RPM (kw) BHP 900 (425) 1000 (470) 1100 (520) 1200 (565) 1300 (615) 1400 (660) 1500 (710) 1600 (755) 1700 (800) 1800 (850) 1900 (895) 2000 (945) 2100 (990) 2200 (1040) 2300 (1085) 2400 (1135) 2500 (1180) 2600 (1225) 2700 (1275) 2800 (1320) 2900 (1370) 3000 (1415) (0.04) (0.07) (0.07) (0.11) (0.15) (0.15) (0.22) (0.26) (0.30) (0.37) (0.41) (0.48) (0.56) (0.63) (0.75) (0.86) (0.93) (1.08) (1.19) (1.34) (1.49) (1.64) (0.07) (0.11) (0.11) (0.15) (0.19) (0.22) (0.26) (0.30) (0.34) (0.41) (0.48) (0.56) (0.63) (0.71) (0.82) (0.93) (1.04) (1.16) (1.27) (1.42) (1.57) (1.75) (0.15) (0.15) (0.19) (0.19) (0.22) (0.26) (0.30) (0.37) (0.41) (0.48) (0.56) (0.63) (0.71) (0.78) (0.90) (1.01) (1.12) (1.23) (1.38) (1.53) (1.68) (1.83) (0.22) (0.22) (0.26) (0.26) (0.30) (0.34) (0.37) (0.45) (0.48) (0.56) (0.63) (0.71) (0.78) (0.86) (0.97) (1.08) (1.19) (1.31) (1.45) (1.60) (1.75) (1.94) (0.30) (0.34) (0.34) (0.37) (0.37) (0.41) (0.48) (0.52) (0.56) (0.63) (0.71) (0.78) (0.86) (0.97) (1.04) (1.16) (1.31) (1.42) (1.57) (1.72) (1.87) (2.01) (0.45) (0.45) (0.45) (0.48) (0.48) (0.52) (0.56) (0.60) (0.67) (0.75) (0.78) (0.90) (0.97) (1.04) (1.16) (1.27) (1.38) (1.53) (1.64) (1.79) (1.98) (0.56) (0.56) (0.56) (0.60) (0.63) (0.63) (0.67) (0.71) (0.78) (0.82) (0.90) (0.97) (1.08) (1.16) (1.27) (1.38) (1.49) (1.64) (1.79) (0.75) (0.75) (0.71) (0.75) (0.75) (0.78) (0.82) (0.86) (0.90) (0.97) (1.01) (1.08) (1.19) (1.27) (1.38) (1.49) (0.93) (0.90) (0.90) (0.90) (0.90) (0.93) (0.93) (0.97) (1.04) (1.08) (1.16) (1.23) (1.31) (1.12) (1.08) (1.08) (1.08) (1.08) (1.08) (1.12) (1.12) Bold italics indicates field furnished drive. NOTES 1) Field installed drive kits are available for RPM ranges listed in table 14. Installer must provide drives for air requirements outside of these ranges. 2) Units are not approved for operation above 1325 rpm. Page 11

13 Air Volume cfm TABLE 4 LCA/LCC BELT DRIVE BLOWER PERFORMANCE TOTAL STATIC PRESSURE Inches Water Gauge (Pa).00 (00).20 (50).40 (100).60 (150).80 (200) 1.00 (250) 1.20 (300) 1.40 (350) 1.60 (400) 1.80 (450) (kw) BHP (kw) BHP (kw) BHP (kw) BHP (kw) BHP (kw) BHP (kw) BHP (kw) BHP (kw) BHP (0.04) ((0.07) (0.11) (0.19) (0.30) (0.41) (0.52) (0.67) (0.82) (0.97) (L/s) RPM BHP (kw) RPM 900 (427) 1000 (474) 1100 (521) 1200 (568) 1300 (615) 1400 (663) 1500 (710) 1600 (757) 1700 (804) 1800 (850) 1900 (899) 2000 (945) 2100 (993) 2200 (1040) 2300 (1087) 2400 (1135) 2500 (1182) 2600 (1229) 2700 (1276) 2800 (1323) 2900 (1371) 3000 (1418) (0.04) (0.07) (0.15) (0.22) (0.30) (0.41) (0.52) (0.67) (0.82) (0.97) ((0.04) (0.11) (0.15) (0.22) (0.30) (0.41) (0.56) (0.67) (0.82) (0.97) (0.07) (0.11) (0.19) (0.26) (0.34) (0.45) (0.56) (0.67) (0.82) (0.97) (0.07) (0.15) (0.19) (0.26) (0.37) (0.45) (0.60) (0.71) (0.82) (0.97) (0.11) (0.15) (0.22) (0.30) (0.37) (0.48) (0.60) (0.71) (0.82) (1.01) (0.11) (0.19) (0.26) (0.34) (0.41) (0.52) (0.63) (0.75) (0.90) (1.04) (0.15) (0.22) (0.30) (0.37) (0.45) (0.56) (0.67) (0.78) (0.93) (1.04) (0.19) (0.26) (0.34) (0.41) (0.48) (0.60) (0.71) (0.82) (0.97) (1.80) (0.22) (0.30) (0.37) (0.45) (0.52) (0.63) (0.75) (0.86) (1.01) (1.12) (0.26) (0.34) (0.41) (0.48) (0.60) (0.67) (0.78) (0.93) (1.04) (1.19) (0.30) (0.37) (0.45) (0.52) (0.63) (0.75) (0.86) (0.97) (1.12) (1.23) (0.34) (0.41) (0.52) (0..60) (0.67) (0.78) (0.90) (1.04) (1.16) (1.31) (0.41) (0.48) (0.56) (0.63) (0.75) (0.86) (0.97) (1.08) (1.23) (1.38) (0.45) (0.52) (0.63) (0.71) (0.82) (0.93) (1.04) (1.16) (1.31) (1.45) (0.52) (0.60) (0.71) (0.78) (0.90) (1.01) (1.12) (1.27) (1.38) (1.53) (0.60) (0.67) (0.78) (0.86) (0.97) (1.08) (1.19) (1.34) (1.45) (0.67) (0.75) (0.86) (0.97) (1.04) (1.16) (1.31) (1.42) (1.57) (0.75) (0.82) (0.93) (1.04) (1.16) (1.27) (1.38) (1.53) (1.64) (0.82) (0.93) (1.01) (1.12) (1.23) (1.38) (1.49) (1.64) (1.75) (0.90) (1.01) (1.12) (1.23) (1.34) (1.45) (1.60) (1.72) (1.01) (1.12) (1.23) (1.34) (1.45) (1.57) (1.72) (1.87) Bold italics indicates field furnished drives. NOTES 1) Field installed drive kits are available for RPM ranges listed in table 14. Installer must provide drives for air requirements outside of these ranges. 2) Units are not approved for operation over 1325 rpm. Page 12

14 TABLE DIRECT DRIVE BLOWER 208 VOLTS (Downflow) Air Volume at Various Blower Speeds External Static Pressure High Medium-High Medium Medium-Low Low in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s NOTE All air data is measured external to unit with dry coil and 2 inch (51 mm) filters. TABLE DIRECT DRIVE BLOWER 230 VOLTS (Downflow) Air Volume at Various Blower Speeds External Static Pressure High Medium-High Medium Medium-Low Low in. w.g. Pa cfm L/s cfm L/s cfm L/s cfm L/s cfm L/s NOTE All air data is measured external to unit with dry coil and 2 inch (51 mm) filters. TABLE DIRECT DRIVE BLOWER 460/575 VOLTS (Downflow) Air Volume at Various Blower Speeds External Static Pressure High Medium Low in. w.g. Pa cfm L/s cfm L/s cfm L/s NOTE All air data is measured external to unit with dry coil and 2 inch (51 mm) filters. Page 13

15 E Blower Table Notes Blower tables include resistance for base units only with two row dry indoor coil and air filters in place. For all other units: 3 Any field installed accessories air resistance (horizontal roof frame, diffuser, etc.). See tables 9 through 13. Use the blower table to determine blower motor output and drives required. Determine total system design static pressure, then add: 1 Wet indoor coil air resistance of selected unit. 2 Any factory installed options air resistance (electric heat, economizer, etc.). See table 8. F Field Furnished Blower Drives For field furnished blower drives, use tables 3 and 4 to determine BHP and RPM required. Reference table 14 to determine the drive number and table 15 to determine the manufacturer s model number. TABLE 8 ACCESSORY AIR RESISTANCE Total Resistance inches water gauge (Pa) Air Volume Wet Indoor Coil Electric Heat cfm L/s 036S/036H/042S/ (LCA/LCC Economizer 042H/048S/060S 048H/060H/072S 072H Models) (4) 0.04 (9) 0.05 (13) 0.04 (10) 0.04 (10) (4) 0.05 (12) 0.07 (18) 0.06 (15) 0.04 (10) (8) 0.06 (16) 0.09 (24) 0.09 (22) 0.04 (10) (10) 0.08 (21) 0.12 (31) 0.12 (30) 0.04 (10) (13) 0.10 (26) 0.15 (38) 0.16 (40) 0.04 (10) (16) 0.12 (31) 0.18 (46) 0.21 (52) 0.05 (12) (18) 0.14 (36) 0.21 (53) 0.25 (62) 0.05 (12) (21) 0.17 (42) 0.25 (62) 0.31 (77) 0.05 (12) (27) 0.19 (48) 0.28 (70) 0.37 (92) 0.05 (12) (32) 0.22 (54) 0.31 (77) 0.43 (107) 0.06 (15) (40) 0.25 (63) 0.36 (88) 0.50 (125) 0.06 (15) (50) 0.29 (71) 0.41 (101) 0.58 (144) 0.06 (15) Air Volume cfm L/s 2 Ends Open TABLE 9 CEILING DIFFUSER AIR RESISTANCE Total Resistance inches water gauge (Pa) RTD9 Step-Down Diffuser RTD11 Step-Down Diffuser 1 Side 2 Ends Open All Ends & Sides Open FD9 Flush Diffuser 2 Ends Open 1 Side 2 Ends Open All Ends & Sides Open FD11 Flush Diffuser ( (32) 0.11 (27) 0.11 (27) ( (40) 0.14 (35) 0.14 (35) ( (50) 0.17 (42) 0.17 (42) ( (65) 0.20 (50) 0.20 (50) ( (80) 0.20 (50) 0.24 (60) ( (100) 0.30 (75) 0.30 (75) 0.13 (32) 0.11 (27) 0.09 (22) 0.09 (22) ( (125) 0.36 (90) 0.36 (90) 0.15 (37) 0.13 (32) 0.11 (27) 0.10 (25) ( (157) 0.44 (110) 0.44 (110) 0.18 (45) 0.15 (37) 0.12 (30) 0.12 (30) (52) 0.18 (45) 0.15 (37) 0.14 (35) (60) 0.21 (52) 0.18 (45) 0.17 (42) (67) 0.24 (60) 0.21 (52) 0.20 (50) (80) 0.29 (72) 0.25 (62) 0.25 (62) Page 14

16 TABLE 10 RTD9 65 CEILING DIFFUSER AIR RESISTANCE Air Volume Effective Throw cfm L/s ft. m Effective throw based on terminal velocities of 75 ft. (22.9 m) per minute. TABLE 11 RTD11 95 CEILING DIFFUSER AIR RESISTANCE Air Volume Effective Throw cfm L/s ft. m Effective throw based on terminal velocities of 75 ft. (22.9 m) per minute. TABLE 12 FD9 65 CEILING DIFFUSER AIR RESISTANCE Air Volume Effective Throw ft. (m) cfm L/s ft. m Effective throw based on terminal velocities of 75 ft. (22.9 m) per minute. TABLE 13 FD11 95 CEILING DIFFUSER AIR RESISTANCE Air Volume Effective Throw cfm L/s ft. m Effective throw based on terminal velocities of 75 ft. (22.9 m) per minute. TABLE 14 FACTORY INSTALLED DRIVE KIT SPECIFICATIONS Motor Outputs RPM Range Nominal hp Maximum hp Nominal kw Maximum kw Drive 1 Drive 2 Drive 3 Drive 4 Standard or High Efficiency Standard or High Efficiency Standard Efficiency Only In Canada, nominal motor output is also maximum usable motor output. If motors of comparable output are used, be sure to keep within the service factor limitations outlined on the motor nameplate. DRIVE NO. TABLE 15 MANUFACTURER S NUMBERS DRIVE COMPONENTS ADJUSTABLE SHEAVE FIXED SHEAVE BELTS (1 REQUIRED) BROWNING NO. OEM PART NO. BROWNING NO. OEM PART NO. BROWNING NO. OEM PART NO. 1 1VP34x7/8 31K6901 AK59x1 31K6801 AX43 73K VP40x7/8 79J0301 AK59x1 31K6801 AX43 73K VP44x7/8 P AK59x1 31K6801 AX44 12L VP44x7/8 P AK51x1 18L2201 AX43 73K8201 Page 15

17 Cooling Start Up IMPORTANT The crankcase heater (standard on some models) must be energized for 24 hours before attempting to start compressor. Set thermostat so there is no demand to prevent compressor from cycling. Apply power to unit. IMPORTANT Units contain either R 22 or R 410A refrigerant. Check the nameplate to determine the type of refrigerant before installation or servicing. A Preliminary Checks 1 Make sure that unit is installed in accordance with the installation instructions and applicable codes. 2 Inspect all electrical wiring, both field and factory installed, for loose connections. Tighten as required. 3 Check to ensure that refrigerant lines do not rub against the cabinet or against other refrigerant lines. 4 Check voltage at disconnect switch. Voltage must be within range listed on nameplate. If not, consult power company and have voltage condition corrected before starting unit. 5 Refer to unit diagram located on inside of compressor access door for unit wiring. 6 Adjust blower belt or blower speed tap according to Blower Operation and Adjustments" section. 7 Make sure filters are in place before start-up. B Start Up 1 Set fan switch to AUTO or ON and move system selection switch to cool. Adjust thermostat to a setting below room temperature to bring on the compressor. Compressor will start and cycle on demand from thermostat. 2 The refrigerant circuit is charged with either HCFC 22 or R 410A refrigerant. See unit rating plate for type of refrigerant and correct amount of charge. 3 Refer to Cooling Operation and Adjustment section for proper method to check refrigerant charge. C Three Phase Scroll Compressor Voltage Phasing Three phase scroll compressors must be phased sequentially to ensure correct compressor and blower rotation and operation. Compressor and blower are wired in phase at the factory 1 Observe suction and discharge pressures and blower rotation on unit start up. 2 Suction pressure must drop, discharge pressure must rise, and blower rotation must match rotation marking. If pressure differential is not observed or blower rotation is not correct: 3 Disconnect all remote electrical power supplies. 4 Reverse any two field installed wires connected to the line side of S48 disconnect, CB10 circuit breaker, or TB2 terminal strip. Do not reverse wires at blower contactor. 5 Make sure the connections are tight. Discharge and suction pressures should operate at their normal start-up ranges. D R 410A Refrigerant Units charged with R 410A refrigerant operate at much higher pressures than R 22. The expansion valve and liquid line drier provided with the unit are approved for use with R 410A. Do not replace them with components designed for use with R 22. R 410A refrigerant is stored in a pink cylinder. Manifold gauge sets used with systems charged with R 410A refrigerant must be capable of handling the higher system operating pressures. The gauges should be rated for use with pressures of on the high side and a low side of 30" vacuum to 250 psi with dampened speed to 500 psi. Gauge hoses must be rated for use at up to 800 psi of pressure with a 4000 psi burst rating. IMPORTANT Mineral oils are not compatible with R 410A. If oil must be added, it must be a polyol ester oil. E Charging/Checking Charge WARNING Do not exceed nameplate charge under any condition. This unit is factory charged and should require no further adjustment. If the system requires charge, reclaim the charge, evacuate the system, and add required nameplate charge. NOTE System charging is not recommended below 60 F (15 C). In temperatures below 60 F (15 C), the charge must be weighed into the system. If weighing facilities are not available, or to check the charge, use the following procedure: IMPORTANT Charge unit in standard cooling mode. 1 Attach gauge manifolds and operate unit in cooling mode until system stabilizes (approximately five minutes). Make sure all outdoor air dampers are closed. Page 16

18 2 Use a thermometer to accurately measure the outdoor ambient temperature. 3 Apply the outdoor temperature to tables 16 through 34 to determine normal operating pressures. 4 Compare the normal operating pressures to the pressures obtained from the gauges. 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. Correct any system problems before proceeding. 5 If discharge pressure is high, remove refrigerant from the system. If discharge pressure is low, add refrigerant to the system. Add or remove charge in increments. Allow the system to stabilize each time refrigerant is added or removed. 6 Use the following subcooling method along with the normal operating pressures to confirm readings. TABLE 16 LG/LC Series 036H R 22 Std. & Humiditrol Outdoor Coil Entering Air Temp DIscharge F F F F F F TABLE 17 LG/LC Series 036S R 22 Outdoor Coil DIscharge Entering Air Temp F F F F F F TABLE 18 LG/LC Series 036H R 410A Std. & Humiditrol Outdoor Coil Entering Air Temp DIscharge F F F F F F Outdoor Coil Entering Air Temp TABLE 19 LG/LC Series 042H R 22 DIscharge F F F F F F Outdoor Coil Entering Air Temp TABLE 20 LG/LC Series 042S R 22 DIscharge F F F F F F Outdoor Coil Entering Air Temp TABLE 21 LG/LC Series 048H R 22 DIscharge F F F F F F Outdoor Coil Entering Air Temp TABLE 22 LG/LC Series 048S R 22 DIscharge F F F F F F TABLE 23 LG/LC Series 048H R 22 Humiditrol Outdoor Coil Entering Air Temp DIscharge F F F F F F Page 17

19 TABLE 24 LG/LC Series 048H R 410A Std. & Humiditrol Outdoor Coil Entering Air Temp DIscharge F F F F F F TABLE 25 LG/LC Series 060H R 22 Outdoor Coil DIscharge Entering Air Temp F F F F F F TABLE 26 LG/LC Series 060S R 22 Outdoor Coil DIscharge Entering Air Temp F F F F F F TABLE 27 LG/LC Series 060H R 22 Humiditrol Outdoor Coil Entering Air Temp DIscharge F F F F F F TABLE 28 LG/LC Series 060H R 410A DIscharge +10 Outdoor Coil Entering Air Temp 65 F F F F F F TABLE 29 LG/LC Series 060H R 410A Humiditrol Outdoor Coil Entering Air Temp DIscharge F F F F F F TABLE 30 LG/LC Series 072H R 22 Outdoor Coil DIscharge Entering Air Temp F F F F F F TABLE 31 LG/LC Series 072S R 22 Outdoor Coil DIscharge Entering Air Temp F F F F F F TABLE 32 LG/LC Series 072S R 22 Humiditrol Outdoor Coil Entering Air Temp DIscharge F F F F F F TABLE 33 LG/LC Series 072H R 410A Std. DIscharge +10 Outdoor Coil Entering Air Temp 65 F F F F F F Page 18

20 TABLE 34 LG/LC Series 072S R 410A Std. Outdoor Coil Entering Air Temp DIscharge F F F F F F F Charge Verification Subcooling Method If ambient temperature is above 60 F (15 C), read liquid line temperature. Read liquid line pressure from gauge and convert to condensing temperature using standard R 22 or R 410A temperature/pressure conversion chart (or conversion scale on gauge). The difference between the condensing temperature and the liquid line temperature is subcooling (subcooling = condensing temperature minus liquid line temperature). The subcooling should approximate the value given in table 35. Add refrigerant to increase subcooling and remove refrigerant to reduce subcooling. Unit TABLE 35 SUBCOOLING R 22 Temperature 036S, 042S, 042H, 048S, 072H Std. 10 F + 1 (5.6 C + 0.5) 036H Std. & Humiditrol 7 F + 1 (3.9 C + 0.5) 048H Std. 12 F + 1 (6.6 C + 0.5) 060H Std. 11 F + 1 (6.1 C + 0.5) 072S Std. 19 F + 1 (11 C + 0.5) 060S Std. 14 F + 1 (7.8 C + 0.5) 048H Humiditrol 072S Humiditrol 16 F + 1 ( 9 C + 0.5) 060H Humiditrol 15 F + 1 (8.3 C + 0.5) R 410A 036 Std. & Humiditrol 8 F + 1 (4.4 C + 0.5) 072S, 048 Std. & Humiditrol 9 F + 1 (5.0 C + 0.5) 060H Std. 11 F + 1 (6.1 C + 0.5) 060H Humiditrol 15 F + 1 (8.3 C + 0.5) 072H Std. 15 F + 1 (8.3 C + 0.5) G Compressor Controls 1 High Pressure Switch (S4) R 22 The compressor circuit is protected by a high pressure switch which cuts out at (3103 kpa + 70 kpa) and automatically resets at (2069kPa + 138kPa). High Pressure Switch (S4) R 410A The compressor circuit is protected by a high pressure switch which opens at (4413 kpa + 70 kpa) and automatically resets at (3275kPa kpa). 2 Low Pressure Switch (S87) R 22 The compressor circuit is protected by a loss of charge switch. Switch cuts out at 25 (172 kpa) and automatically resets at 55 (379 kpa). Low Pressure Switch (S87) R 410A The compressor circuit is protected by a loss of charge switch. Switch opens at ( kpa) and automatically resets at (621 kpa + 34 kpa). 3 Freezestat (S49) The compressor is protected by a freezestat located on the indoor coil. The freezestat opens at 29 F+3 ( 2 C+2) and closes at 58 F+4 (14 C+2). 4 Compressor Crankcase Heater (HR1) Crankcase heater must be energized at all times to prevent compressor damage due to refrigerant migration. Energize crankcase heater 24 hours before unit start up by setting thermostat so that there is no cooling demand (to prevent compressor from cycling) and apply power to unit. 5 Low Ambient Pressure Switch (S11) R 22 Switch maintains adequate discharge pressure by de energizing condenser fan when liquid pressure falls below (965 kpa+69). S11 is installed in the liquid line. Switch closes to energize condenser fan when pressure rises to (1896kPa + 69). Low Ambient Pressure Switch (S11) R 410A Switch maintains adequate discharge pressure by de energizing condenser fan when liquid pressure falls below (1655 kpa+69). S11 is installed in the liquid line. Switch closes to energize condenser fan when pressure rises to (3103kPa + 69). 6 Discharge Line Thermostat (S40) 3 through 5 Ton Units Only Switch opens when discharge line temperature reaches 94 F+5 (34 C+3) and closes when temperature falls below 74 F+5 (23 C+3). Prevents crankcase heater operation in warm weather. Page 19