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Litho U.S.A. ©2006 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 3 3 4 4 4 5 5 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 7 9 16 20 22 23 26 RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE LGA SHOWN 01/06 *2P0106* 505,147M *P505147M* LGA/LCA/LGC/LCC036−072 Unit Dimensions − Inches (mm) *Reheat coils are factory−installed in Humiditrol units only. OPTIONAL OUTDOOR AIR HOOD (Factory or Field Installed) EVAPORATOR COIL REHEAT COIL* CONDENSER COIL 4-1/2 (114) 4-1/2 (114) CENTER OF GRAVITY CONDENSER COIL INTAKE AIR BOTTOM RETURN AIR OPENING 46-1/2 (1181) Base 14 (356) 4-1/2 (114) 6-1/8 (156) CONDENSER COIL INTAKE AIR 28 (711) 14 (356) BOTTOM SUPPLY AIR OPENING 28 (711) 4-1/2 (114) BOTTOM POWER ENTRY 5 x 8 (127 x 203) BLOWER 4-1/2 (114) BLOWER MOTOR 87-1/2 (2223) HEAT EXCHANGER (Optional electric heat in LCA/LCC units) Base TOP VIEW TOP VIEW BASE SECTION OPTIONAL DISCONNECT / CIRCUIT BREAKER 86 (2184) *ELECTRICAL INLET (High Voltage) HORIZONTAL SUPPLY AIR OPENING CONTROL BOX FLUE/VENT OUTLET 33-1/4 (845) BLOWER 28 (711) CONDENSER COIL 36-1/2 (927) 14 (356) 14 (356) 28 (711) 14 (356) OPTIONAL *ELECTRICAL INLET 115 VOLT OUTLET (Low Voltage) (Factory Installed) GAS INLET COMPRESSOR COMBUSTION AIR INTAKE 3-1/4 (83) FORKLIFT SLOTS (Front, Back & Blower End) LIFTING HOLES (For Rigging Both Sides) *When Factory Installed Disconnect is Not Used. FRONT VIEW OPTIONAL ECONOMIZER DAMPERS Or OUTDOOR AIR DAMPERS (Factory or Field Installed) 45 (1143) FILTERS OUTDOOR AIR OPTIONAL GRAVITY EXHAUST HOOD (Field Installed) OPTIONAL GRAVITY EXHAUST DAMPERS (Factory or Field Installed) REHEAT COIL* EVAPORATOR COIL OPTIONAL OUTDOOR AIR HOOD (Factory or Field Installed) EXHAUST AIR 24-3/4 (629) BACK VIEW OPTIONAL ECONOMIZER DAMPERS (Factory or Field Installed) 1/4 (6) 15 (381) 15 (381) 45 (1143) FILTERS OPTIONAL OUTDOOR AIR HOOD (Factory or Field Installed) FLUE/VENT OUTLET OUTDOOR AIR OPTIONAL POWER EXHAUST FAN (Field Installed) Down−flow Applications Only BLOWER 4 (102) COMBUSTION AIR INTAKE EXHAUST AIR 5-1/8 (130) CONDENSATE DRAIN END VIEW (Economizer/Outdoor Air Dampers) FIGURE 1 Page 1 HORIZONTAL RETURN AIR OPENING REHEAT COIL* EVAPORATOR COIL 32-1/4 (819) 31-1/2 (800) 24-1/4 (616) BLOWER 5-1/8 (130) CONDENSATE DRAIN END VIEW (Power Exhaust) LGA/LCA/LGC/LCC036−072 Parts Arrangement LGA/LGC CONDENSER FAN HEAT EXCHANGER REHEAT COIL (HUMIDITROL® UNITS ONLY) EVAPORATOR COIL FILTERS ECONOMIZER (OPTIONAL) COMPRESSOR COMBUSTION AIR INDUCER CONDENSATE DRAIN GAS VALVE DISCONNECT OR CIRCUIT BREAKER (OPTIONAL) 120V GFI OUTLET (OPTIONAL) BURNERS BLOWER TB1 LCA/LCC CONDENSER FAN REHEAT COIL (HUMIDITROL® UNITS ONLY) EVAPORATOR COIL FILTERS ECONOMIZER (OPTIONAL) COMPRESSOR CONDENSATE DRAIN DISCONNECT OR CIRCUIT BREAKER (OPTIONAL) 120V GFI OUTLET (OPTIONAL) ELECTRIC HEAT (OPTIONAL) BLOWER TB1 FIGURE 2 Page 2 Shipping and Packing List WARNING 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 ÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉ ÉÉÉÉ ÉÉÉÉÉ ÉÉÉÉ ÉÉÉÉÉ ÉÉÉÉ ÉÉÉÉÉ ÉÉÉÉ ÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉ ÉÉÉÉÉÉÉÉÉ 36" 36" EVAP. BLOWER HEAT SECTION COND. FAN 36" COMP. 36" FIGURE 3 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. IMPORTANT The Clean Air Act of 1990 bans the intentional venting of refrigerant (CFC’s and HCFC’s) as of July 1, 1992. Approved methods of recovery, recycling or reclaiming must be followed. Fines and/or incarceration may be levied for non−compliance. Page 3 The unit operating conditions (including airflow, cooling operation, ignition, input rate, temperature rise and venting) must be verified according to these installation instructions. 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. 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 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: 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. 1− The base is fully enclosed and insulated, so an enclosed frame is not required. CAUTION 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. In downflow applications, do not drill or punch holes in base of unit. Leaking in roof may occur if unit base is punctured. B−Roof Mounting With Installer’s Frame − Downflow 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. 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 C−Horizontal Discharge Applications 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 UNIT OPEN VENT Á Á Á Á Á MOUNTING FRAME FIGURE 4 Connect Gas Piping PRESSURE TEST GAS LINE 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. GAS PIPE CONNECTION GROUND JOINT UNION MANUAL MAIN SHUT−OFF VALVE UNIT SUPPORT (REFER TO LOCAL CODES) MANUAL MAIN SHUT−OFF VALVE GAS VALVE CAP FIGURE 6 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. UNIT DRIP LEG 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. GAS PIPING SUPPORT High Altitude Derate FIGURE 5 Pressure Test Gas Piping 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 psig (14" w.c.). See figure 6. If the test pressure is equal to or less than 0.5 psig (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. Page 5 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 Gas Manifold Pressure−in. w.g. (kPa) Natural LP (Propane) 4501−5500 (1372−1676) 3.4 (0.85) 10.2 (2.54) 5501−6500 (1676−1981) 3.3 (0.82) 9.8 (2.44) 6501−7500 (1981−2286) 3.2 (0.80) 9.5 (2.36) Altitude − ft. ft (m) 2− Pivot top hood open and secure sides of intake hood Factory−Installed Options to top of hood using three sheet metal screws on each 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 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 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. HOOD TOP SEAL HOOD TOP INTAKE HOOD TOP SEAL NOTE: CAULK EACH SIDE OF TOP SEAL (FIELD PROVIDED) FILTER TOP FILTER BRACKET HOOD TOP UNIT ALIGN VERTICAL HOLES ON BRACKET WITH VERTICAL HOLES ON SIDE OF HOOD HOOD TOP BOTTOM FILTER BRACKET HOOD SIDE FIGURE 8 FIGURE 7 Page 6 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. 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 6.01. 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 TB1 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 non−conductive flat surface. vertically on any 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 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−me96 chanical thermostats set anticipator at 0.1 amps. 95 Not all terminals are provided on all thermostats. Install optional A42 phase monitor and/or S42 overload relay switch. 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. Page 7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 FIGURE 9 IMPORTANT−Terminal connections at the wall plate or subbase must be made securely. Loose control wire connections may result in intermittent operation. 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) 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 11. 24 VOLT FIELD WIRING HUMIDITROL UNITS Connect EITHER an A91 sensor or a remote digital input to TB1 A91 HUMIDITY SENSOR TB1 Connect shield drain to unit TB1−7 − not RH sensor. VIN A2 SENSOR 16 17 TB1 6 GND 7 VOUT 20 ENERGY MANAGEMENT SYSTEM DEHUMIDIFICATION SWITCH FIGURE 10 One wire of the two pairs is not connected. 24 Note − Install sensor and make communication wiring connections as shown in literature provided with sensor. Page 8 FIGURE 11 TABLE 2 MINIMUM AND MAXIMUM PULLEY ADJUSTMENT Blower Operation and Adjustments A−Blower Operation Minimum Turns Open Maximum Turns Open A Section 0 5 B Section 1* 6 Belt 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. *0 Minimum turns open when B belt is used on pulleys 6" O.D. or larger. BLOWER SPEED TAP SELECTION DIRECT DRIVE UNITS B−Determining Unit CFM BLOWER MOTOR 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. HARNESS CONNECTOR 2− Measure static pressure external to unit (from supply to return). 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. DEPRESS TAB TO RELEASE WIRE CONNECTOR. SELECT CONNECTOR LOCATION FOR NEW SPEED. INSERT WIRE UNTIL IT CLICKS. 6− The CFM can be adjusted at the motor pulley (see section C−Blower Belt Adjustment). FIGURE 12 BLOWER SPEED ADJUSTMENT Direct Drive Blowers 7− Referring to tables 5, 6, or 7, use the static pressure and blower speed tap to determine unit CFM. 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). MOTOR MOUNTING PLATE SET SCREW KEY C−Blower Belt Adjustment 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. BLOWER WHEEL MOTOR & PULLEY BELT LOCKING BOLTS TO INCREASE CFM TO DECREASE CFM LOOSEN ALLEN SCREW & TURN PULLEY CLOCKWISE TURN PULLEY COUNTERCLOCKWISE FIGURE 13 Page 9 proper pulley alignment and belt tension are maintained. Overtensioning belts shortens belt and bearing life. Check belt tension as follows: Make sure blower and motor pulley are aligned as shown 1− Measure span length X. See figure 15. in figure 14. 2− 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. Maximum life and wear can be obtained from belts only if Important−Tension new belt after a 24−48 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 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). ALIGNED A force below these values indicates an undertensioned belt. A force above these values indicates an overtensioned belt. BLOWER PULLEY BELT MOTOR PULLEY 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 TABLE 3 LGA/LGC036−072 BELT DRIVE BLOWER PERFORMANCE Air Vol Volume cfm (L/s) TOTAL STATIC PRESSURE Inches Water Gauge (Pa) .00 (00) RPM .20 (50) .40 (100) .60 (150) .80 (200) 1.00 (250) 1.20 (300) 1.40 (350) 1.60 (400) 1.80 (450) BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) 0.05 495 0.10 630 0.20 750 0.30 855 0.40 950 0.60 1035 0.75 1120 1.00 1195 1.25 1270 1.50 (0.04) (0.07) (0.15) (0.22) (0.30) (0.45) (0.56) (0.75) (0.93) (1.12) 900 (425) 350 1000 (470) 375 0.10 (0.07) 515 0.15 (0.11) 645 0.20 (0.15) 760 0.30 (0.22) 860 0.45 (0.34) 955 0.60 (0.45) 1040 0.75 (0.56) 1120 1.00 (0.75) 1195 1.20 (0.90) 1270 1.45 (1.08) 1100 (520) 400 0.10 (0.07) 535 0.15 (0.11) 665 0.25 (0.19) 775 0.35 (0.26) 870 0.45 (0.34) 960 0.60 (0.45) 1045 0.75 (0.56) 1125 0.95 (0.71) 1200 1.20 (0.90) 1270 1.45 (1.08) 1200 (565) 430 0.15 (0.11) 560 0.20 (0.15) 680 0.25 (0.19) 785 0.35 (0.26) 885 0.50 (0.37) 970 0.65 (0.48) 1055 0.80 (0.60) 1130 1.00 (0.75) 1205 1.20 (0.90) 1275 1.45 (1.08) 1300 (615) 460 0.20 (0.15) 590 0.25 (0.19) 700 0.30 (0.22) 805 0.40 (0.30) 895 0.50 (0.37) 985 0.65 (0.48) 1065 0.85 (0.63) 1140 1.00 (0.75) 1210 1.20 (0.90) 1280 1.45 (1.08) 1400 (660) 490 0.20 (0.15) 615 0.30 (0.22) 725 0.35 (0.26) 820 0.45 (0.34) 910 0.55 (0.41) 995 0.70 (0.52) 1075 0.85 (0.63) 1150 1.05 (0.78) 1220 1.25 (0.93) 1285 1.45 (1.08) 1500 (710) 525 0.30 (0.22) 645 0.35 (0.26) 745 0.40 (0.30) 840 0.50 (0.37) 930 0.65 (0.48) 1010 0.75 (0.56) 1085 0.90 (0.67) 1160 1.10 (0.82) 1225 1.25 (0.93) 1295 1.50 (1.12) 1600 (755) 560 0.35 (0.26) 670 0.40 (0.30) 770 0.50 (0.37) 860 0.60 (0.45) 945 0.70 (0.52) 1025 0.80 (0.60) 1100 0.95 (0.71) 1170 1.15 (0.86) 1240 1.30 (0.97) 1305 1.50 (1.12) 1700 (800) 595 0.40 (0.30) 700 0.45 (0.34) 795 0.55 (0.41) 885 0.65 (0.48) 965 0.75 (0.56) 1040 0.90 (0.67) 1115 1.05 (0.78) 1185 1.20 (0.90) 1250 1.40 (1.04) −−− 1800 (850) 630 0.50 (0.37) 730 0.55 (0.41) 820 0.65 (0.48) 905 0.75 (0.56) 985 0.85 (0.63) 1060 1.00 (0.75) 1130 1.10 (0.82) 1200 1.30 (0.97) 1265 1.45 (1.08) −−− 1900 (895) 665 0.55 (0.41) 760 0.65 (0.48) 850 0.75 (0.56) 930 0.85 (0.63) 1005 0.95 (0.71) 1080 1.05 (0.78) 1150 1.20 (0.90) 1215 1.35 (1.01) 1275 1.55 (1.16) −−− 2000 (945) 700 0.65 (0.48) 790 0.75 (0.56) 875 0.85 (0.63) 955 0.95 (0.71) 1030 1.05 (0.78) 1100 1.20 (0.90) 1165 1.30 (0.97) 1230 1.45 (1.08) 1295 1.65 (1.23) −−− 2100 (990) 735 0.75 (0.56) 825 0.85 (0.63) 905 0.95 (0.71) 980 1.05 (0.78) 1050 1.15 (0.86) 1120 1.30 (0.97) 1185 1.45 (1.08) 1250 1.60 (1.19) 1310 1.75 (1.31) −−− 2200 (1040) 770 0.85 (0.63) 855 0.95 (0.71) 930 1.05 (0.78) 1005 1.15 (0.86) 1075 1.30 (0.97) 1140 1.40 (1.04) 1205 1.55 (1.16) 1265 1.70 (1.27) −−− −−− 2300 (1085) 805 1.00 (0.75) 885 1.10 (0.82) 960 1.20 (0.90) 1030 1.30 (0.97) 1100 1.40 (1.04) 1165 1.55 (1.16) 1225 1.70 (1.27) 1285 1.85 (1.38) −−− −−− 2400 (1135) 840 1.15 (0.86) 920 1.25 (0.93) 990 1.35 (1.01) 1060 1.45 (1.08) 1125 1.55 (1.16) 1190 1.70 (1.27) 1250 1.85 (1.38) 1305 2.00 (1.49) −−− −−− 2500 (1180) 875 1.25 (0.93) 950 1.40 (1.04) 1020 1.50 (1.12) 1085 1.60 (1.19) 1150 1.75 (1.31) 1210 1.85 (1.38) 1270 2.00 (1.49) −−− −−− −−− 2600 (1225) 910 1.45 (1.08) 980 1.55 (1.16) 1050 1.65 (1.23) 1115 1.75 (1.31) 1175 1.90 (1.42) 1235 2.05 (1.53) 1295 2.20 (1.64) −−− −−− −−− 2700 (1275) 945 1.60 (1.19) 1015 1.70 (1.27) 1080 1.85 (1.38) 1145 1.95 (1.45) 1205 2.10 (1.57) 1260 2.20 (1.64) 1320 2.40 (1.79) −−− −−− −−− 2800 (1320) 980 1.80 (1.34) 1050 1.90 (1.42) 1110 2.05 (1.53) 1170 2.15 (1.60) 1230 2.30 (1.72) 1285 2.40 (1.79) −−− −−− −−− −−− 2900 (1370) 1015 2.00 (1.49) 1080 2.10 (1.57) 1140 2.25 (1.68) 1200 2.35 (1.75) 1260 2.50 (1.87) 1315 2.65 (1.98) −−− −−− −−− −−− 3000 (1415) 1050 2.20 (1.64) 1115 2.35 (1.75) 1175 2.45 (1.83) 1230 2.60 (1.94) 1285 2.70 (2.01) −−− −−− −−− −−− −−− 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 TABLE 4 LCA/LCC036−072 BELT DRIVE BLOWER PERFORMANCE Air V l Volume cfm (L/s) 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) RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW) 900 (427) 310 0.05 455 0.10 595 (0.04) ((0.07) 0.15 720 (0.11) 0.25 825 (0.19) 0.40 925 (0.30) 0.55 1015 0.70 1100 0.90 1180 1.10 1255 1.30 (0.41) (0.52) (0.67) (0.82) (0.97) 1000 (474) 330 0.05 470 (0.04) 0.10 605 (0.07) 0.20 725 (0.15) 0.30 830 (0.22) 0.40 925 (0.30) 0.55 1015 0.70 1095 0.90 1175 1.10 1250 1.30 (0.41) (0.52) (0.67) (0.82) (0.97) 1100 (521) 350 0.05 485 ((0.04) 0.15 615 (0.11) 0.20 730 (0.15) 0.30 830 (0.22) 0.40 925 (0.30) 0.55 1015 0.75 1095 0.95 1170 1.10 1245 1.30 (0.41) (0.56) (0.67) (0.82) (0.97) 1200 (568) 375 0.10 505 (0.07) 0.15 630 (0.11) 0.25 740 (0.19) 0.35 840 (0.26) 0.45 930 (0.34) 0.60 1015 0.75 1095 0.90 1170 1.10 1240 1.30 (0.45) (0.56) (0.67) (0.82) (0.97) 1300 (615) 400 0.10 525 (0.07) 0.20 645 (0.15) 0.25 750 (0.19) 0.35 845 (0.26) 0.50 935 (0.37) 0.60 1020 0.80 1095 0.95 1170 1.10 1240 1.30 (0.45) (0.60) (0.71) (0.82) (0.97) 1400 (663) 425 0.15 545 (0.11) 0.20 660 (0.15) 0.30 760 (0.22) 0.40 855 (0.30) 0.50 940 (0.37) 0.65 1020 0.80 1100 0.95 1170 1.10 1240 1.35 (0.48) (0.60) (0.71) (0.82) (1.01) 1500 (710) 450 0.15 570 (0.11) 0.25 675 (0.19) 0.35 775 (0.26) 0.45 865 (0.34) 0.55 950 (0.41) 0.70 1030 0.85 1105 1.00 1175 1.20 1245 1.40 (0.52) (0.63) (0.75) (0.90) (1.04) 1600 (757) 475 0.20 590 (0.15) 0.30 695 (0.22) 0.40 790 (0.30) 0.50 875 (0.37) 0.60 960 (0.45) 0.75 1035 0.90 1110 1.05 1180 1.25 1245 1.40 (0.56) (0.67) (0.78) (0.93) (1.04) 1700 (804) 505 0.25 615 (0.19) 0.35 715 (0.26) 0.45 805 (0.34) 0.55 890 (0.41) 0.65 970 (0.48) 0.80 1045 0.95 1115 1.10 1185 1.30 1250 1.45 (0.60) (0.71) (0.82) (0.97) (1.80) 1800 (850) 535 0.30 640 (0.22) 0.40 735 (0.30) 0.50 820 (0.37) 0.60 905 (0.45) 0.70 980 (0.52) 0.85 1055 1.00 1125 1.15 1195 1.35 1255 1.50 (0.63) (0.75) (0.86) (1.01) (1.12) 1900 (899) 565 0.35 665 (0.26) 0.45 755 (0.34) 0.55 840 (0.41) 0.65 920 (0.48) 0.80 995 (0.60) 0.90 1065 1.05 1135 1.25 1200 1.40 1265 1.60 (0.67) (0.78) (0.93) (1.04) (1.19) 2000 (945) 595 0.40 690 (0.30) 0.50 775 (0.37) 0.60 860 (0.45) 0.70 935 (0.52) 0.85 1010 1.00 1080 1.15 1145 1.30 1210 1.50 1270 1.65 (0.63) (0.75) (0.86) (0.97) (1.12) (1.23) 2100 (993) 625 0.45 715 (0.34) 0.55 800 (0.41) 0.70 875 0.80 950 (0.52) (0..60) 0.90 1025 1.05 1090 1.20 1155 1.40 1220 1.55 1280 1.75 (0.67) (0.78) (0.90) (1.04) (1.16) (1.31) 2200 (1040) 655 0.55 740 (0.41) 0.65 820 (0.48) 0.75 895 (0.56) 0.85 970 (0.63) 1.00 1040 1.15 1105 1.30 1170 1.45 1230 1.65 1290 1.85 (0.75) (0.86) (0.97) (1.08) (1.23) (1.38) 2300 (1087) 685 0.60 765 (0.45) 0.70 845 (0.52) 0.85 920 (0.63) 0.95 990 (0.71) 1.10 1055 1.25 1120 1.40 1185 1.55 1245 1.75 1305 1.95 (0.82) (0.93) (1.04) (1.16) (1.31) (1.45) 2400 (1135) 710 0.70 790 (0.52) 0.80 870 (0.60) 0.95 940 (0.71) 1.05 1010 1.20 1075 1.35 1135 1.50 1200 1.70 1260 1.85 1315 2.05 (0.78) (0.90) (1.01) (1.12) (1.27) (1.38) (1.53) 2500 (1182) 740 0.80 820 (0.60) 0.90 890 (0.67) 1.05 960 (0.78) 1.15 1030 1.30 1090 1.45 1155 1.60 1215 1.80 1270 1..95 (0.86) (0.97) (1.08) (1.19) (1.34) (1.45) −−− 2600 (1229) 770 0.90 845 (0.67) 1.00 915 (0.75) 1.15 985 (0.86) 1.30 1050 1.40 1110 1.55 1170 1.75 1230 1.90 1285 2.10 (0.97) (1.04) (1.16) (1.31) (1.42) (1.57) −−− 2700 (1276) 800 1.00 875 (0.75) 1.10 940 (0.82) 1.25 1005 1.40 1070 1.55 1130 1.70 1190 1.85 11245 2.05 1300 2.20 (0.93) (1.04) (1.16) (1.27) (1.38) (1.53) (1.64) −−− 2800 (1323) 830 1.10 900 (0.82) 1.25 965 (0.93) 1.35 1030 1.50 1090 1.65 1150 1.85 1210 2.00 1265 2.20 1320 2.35 (1.01) (1.12) (1.23) (1.38) (1.49) (1.64) (1.75) −−− 2900 (1371) 860 1.20 930 (0.90) 1.35 990 (1.01) 1.50 1055 1.65 1115 1.80 1170 1.95 1225 2.15 1280 2.30 (1.12) (1.23) (1.34) (1.45) (1.60) (1.72) −−− −−− 3000 (1418) 890 1.35 955 (1.01) 1.50 1015 1.65 1075 1.80 1135 1.95 1190 2.10 1245 2.30 1300 2.50 (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 TABLE 5 036−060 DIRECT DRIVE BLOWER PERFORMANCE @ 208 VOLTS (Downflow) Air Volume at Various Blower Speeds External Static Pressure High Medium-High cfm L/s Medium cfm L/s Medium-Low cfm L/s cfm Low L/s in. w.g. Pa cfm L/s 0 0 2530 1195 2265 1070 1970 930 1720 810 1440 680 .10 25 2495 1175 2235 1055 1945 920 1700 800 1430 675 .20 50 2450 1155 2200 1040 1915 905 1670 790 1415 670 .30 75 2405 1135 2160 1020 1880 890 1640 775 1390 655 .40 100 2355 1110 2115 1000 1840 870 1605 755 1360 640 .50 125 2300 1085 2065 975 1795 845 1565 740 1330 630 .60 150 2235 1055 2010 950 1745 825 1515 715 1290 610 .70 175 2165 1020 1945 920 1690 800 1460 690 1245 590 .80 200 2090 985 1875 885 1620 765 1400 660 1195 565 .90 225 2000 945 1790 845 1550 730 1330 630 1130 535 1.00 250 1895 895 1695 800 1460 690 1250 590 1055 500 1.10 275 1770 835 1580 745 1360 640 1160 545 975 460 1.20 300 1620 765 1440 680 1240 585 1055 500 870 410 NOTE All air data is measured external to unit with dry coil and 2 inch (51 mm) filters. TABLE 6 036−060 DIRECT DRIVE BLOWER PERFORMANCE @ 230 VOLTS (Downflow) Air Volume at Various Blower Speeds External Static Pressure High Medium-High cfm L/s Medium cfm L/s Medium-Low cfm L/s cfm Low L/s in. w.g. Pa cfm L/s 0 0 2750 1300 2500 1180 2245 1060 1955 925 1630 770 .10 25 2705 1275 2470 1165 2215 1045 1925 910 1600 755 .20 50 2650 1250 2430 1145 2180 1030 1890 890 1570 740 .30 75 2585 1220 2390 1130 2140 1010 1850 875 1535 725 .40 100 2535 1195 2340 1105 2100 990 1810 855 1500 710 .50 125 2475 1170 2290 1080 2050 965 1760 830 1455 685 .60 150 2405 1135 2225 1050 1995 940 1705 805 1405 665 .70 175 2330 1100 2155 1015 1930 910 1640 775 1365 645 .80 200 2245 1060 2075 980 1865 880 1575 745 1310 620 .90 225 2155 1015 1975 930 1780 840 1495 705 1240 585 1.00 250 2050 965 1860 880 1690 800 1405 665 1150 545 1.10 275 1935 915 1720 810 1585 750 1290 610 1040 490 1.20 300 1805 850 1560 735 1450 685 1160 545 915 430 NOTE All air data is measured external to unit with dry coil and 2 inch (51 mm) filters. TABLE 7 036−060 DIRECT DRIVE BLOWER PERFORMANCE @ 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 0 0 2820 1330 2460 1160 1975 930 .10 25 2770 1305 2430 1145 1950 920 .20 50 2720 1285 2395 1130 1920 905 .30 75 2670 1260 2345 1105 1885 890 .40 100 2610 1230 2310 1090 1845 870 .50 125 2545 1200 2260 1065 1800 850 .60 150 2475 1170 2200 1040 1755 830 .70 175 2400 1130 2140 1010 1700 800 .80 200 2315 1090 2065 975 1635 770 .90 225 2220 1045 1980 935 1565 740 1.00 250 2115 1000 1880 885 1480 700 1.10 275 2000 945 1760 830 1370 647 1.20 300 1860 875 1615 760 1260 595 NOTE All air data is measured external to unit with dry coil and 2 inch (51 mm) filters. Page 13 3− Any field installed accessories air resistance (horizontal roof frame, diffuser, etc.). See tables 9 through 13. 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 Use the blower table to determine blower motor output and drives required. units: F−Field−Furnished Blower Drives For field−furnished blower drives, use tables 3 and 4 to 1− Wet indoor coil air resistance of selected unit. determine BHP and RPM required. Reference table 14 to 2− Any factory installed options air resistance (electric determine the drive number and table 15 to determine the manufacturer’s model number. heat, economizer, etc.). See table 8. TABLE 8 ACCESSORY AIR RESISTANCE Determine total system design static pressure, then add: Total Resistance inches water gauge (Pa) Air Volume Wet Indoor Coil cfm L/s 036S/036H/042S/ 042H/048S/060S 048H/060H/072S 072H Electric Heat (LCA/LCC Models) Economizer 800 380 0.02 (4) 0.04 (9) 0.05 (13) 0.04 (10) 0.04 (10) 1000 470 0.02 (4) 0.05 (12) 0.07 (18) 0.06 (15) 0.04 (10) 1200 565 0.03 (8) 0.06 (16) 0.09 (24) 0.09 (22) 0.04 (10) 1400 660 0.04 (10) 0.08 (21) 0.12 (31) 0.12 (30) 0.04 (10) 1600 755 0.05 (13) 0.10 (26) 0.15 (38) 0.16 (40) 0.04 (10) 1800 850 0.06 (16) 0.12 (31) 0.18 (46) 0.21 (52) 0.05 (12) 2000 945 0.07 (18) 0.14 (36) 0.21 (53) 0.25 (62) 0.05 (12) 2200 1040 0.09 (21) 0.17 (42) 0.25 (62) 0.31 (77) 0.05 (12) 2400 1135 0.11 (27) 0.19 (48) 0.28 (70) 0.37 (92) 0.05 (12) 2600 1225 0.013 (32) 0.22 (54) 0.31 (77) 0.43 (107) 0.06 (15) 2800 1320 0.16 (40) 0.25 (63) 0.36 (88) 0.50 (125) 0.06 (15) 3000 1415 0.20 (50) 0.29 (71) 0.41 (101) 0.58 (144) 0.06 (15) TABLE 9 CEILING DIFFUSER AIR RESISTANCE Air Volume Total Resistance inches water gauge (Pa) RTD9 Step-Down Diffuser RTD11 Step-Down Diffuser FD9 Flush 2 Ends 1 Side All Ends & 2 Ends 1 Side All Ends & Diffuser Open 2 Ends Open Sides Open Open 2 Ends Open Sides Open FD11 Flush Diffuser cfm L/s 800 380 0.15 (37 0.13 (32) 0.11 (27) 0.11 (27) −−−− −−−− −−−− −−−− 1000 470 0.19 (47 0.16 (40) 0.14 (35) 0.14 (35) −−−− −−−− −−−− −−−− 1200 565 0.25 (62 0.20 (50) 0.17 (42) 0.17 (42) −−−− −−−− −−−− −−−− 1400 660 0.33 (82 0.26 (65) 0.20 (50) 0.20 (50) −−−− −−−− −−−− −−−− 1600 755 0.43 (107 0.32 (80) 0.20 (50) 0.24 (60) −−−− −−−− −−−− −−−− 1800 850 0.56 (139 0.40 (100) 0.30 (75) 0.30 (75) 0.13 (32) 0.11 (27) 0.09 (22) 0.09 (22) 2000 945 0.73 (182 0.50 (125) 0.36 (90) 0.36 (90) 0.15 (37) 0.13 (32) 0.11 (27) 0.10 (25) 2200 1040 0.95 (237 0.63 (157) 0.44 (110) 0.44 (110) 0.18 (45) 0.15 (37) 0.12 (30) 0.12 (30) 2400 1135 −−−− −−−− −−−− −−−− 0.21 (52) 0.18 (45) 0.15 (37) 0.14 (35) 2600 1225 −−−− −−−− −−−− −−−− 0.24 (60) 0.21 (52) 0.18 (45) 0.17 (42) 2800 1320 −−−− −−−− −−−− −−−− 0.27 (67) 0.24 (60) 0.21 (52) 0.20 (50) 3000 1415 −−−− −−−− −−−− −−−− 0.32 (80) 0.29 (72) 0.25 (62) 0.25 (62) Page 14 TABLE 12 FD9−65 CEILING DIFFUSER AIR RESISTANCE TABLE 10 RTD9−65 CEILING DIFFUSER AIR RESISTANCE Effective Throw Air Volume Effective Throw ft. (m) Air Volume cfm L/s ft. m cfm L/s ft. m 1000 470 10−17 3−5 1000 470 15−20 5−6 1200 565 11−18 3−5 1200 565 16−22 5−7 1400 660 12−19 4−6 1400 660 17−24 5−7 1600 755 12−20 4−6 1600 755 18−25 5−7 1800 850 13−21 4−6 1800 850 20−28 6−9 2000 945 14−23 4−7 2000 945 21−29 6−9 2200 1040 16−25 5−8 2200 1040 22−30 7−9 Effective throw based on terminal velocities of 75 ft. (22.9 m) per minute. Effective throw based on terminal velocities of 75 ft. (22.9 m) per minute. TABLE 11 RTD11−95 CEILING DIFFUSER AIR RESISTANCE TABLE 13 FD11−95 CEILING DIFFUSER AIR RESISTANCE Effective Throw Air Volume Effective Throw Air Volume cfm L/s ft. m cfm L/s ft. m 2600 1225 24−29 7−9 2600 1225 19−24 6−7 2800 1320 25−30 8−9 2800 1320 20−28 6−9 3000 1415 27−33 8−10 3000 1415 21−29 6−9 3200 1510 28−35 9−11 3200 1510 22−29 7−9 3400 1605 30−37 9−11 3400 1605 22−30 7−9 Effective throw based on terminal velocities of 75 ft. (22.9 m) per minute. 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 − 1.5 1.72 1.1 1.3 615 − 920 800 − 1105 −−−− −−−− Standard or High Efficiency − 2 2.3 1.5 1.7 −−−− −−−− 920 − 1230 −−−− Standard Efficiency Only − 3 3.45 2.2 2.6 −−−− −−−− −−−− 1070 − 1325 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. TABLE 15 MANUFACTURER’S NUMBERS DRIVE NO NO. ADJUSTABLE SHEAVE DRIVE COMPONENTS 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 73K8201 2 1VP40x7/8 79J0301 AK59x1 31K6801 AX43 73K8201 3 1VP44x7/8 P−8−1488 AK59x1 31K6801 AX44 12L2601 4 1VP44x7/8 P−8−1488 AK51x1 18L2201 AX43 73K8201 Page 15 2− Suction pressure must drop, discharge pressure must rise, and blower rotation must match rotation marking. 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. 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. IMPORTANT Units contain either R−22 or R−410A refrigerant. Check the nameplate to determine the type of refrigerant before installation or servicing. 5− Make sure the connections are tight. A−Preliminary Checks Discharge and suction pressures should operate at their normal start-up ranges. 1− Make sure that unit is installed in accordance with the installation instructions and applicable codes. D−R−410A Refrigerant 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. 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 0−800 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. 7− Make sure filters are in place before start-up. IMPORTANT B−Start−Up Mineral oils are not compatible with R−410A. If oil must be added, it must be a polyol ester oil. 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. E−Charging/Checking Charge 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. 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. 3− Refer to Cooling Operation and Adjustment section for proper method to check refrigerant charge. NOTE − System charging is not recommended below 60F (15C). In temperatures below 60F (15C), the charge must be weighed into the system. 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 WARNING−Do not exceed nameplate charge under any condition. If weighing facilities are not available, or to check the charge, use the following procedure: IMPORTANT − Charge unit in standard cooling mode. 1− Observe suction and discharge pressures and blower rotation on unit start−up. Page 16 1− Attach gauge manifolds and operate unit in cooling mode until system stabilizes (approximately five minutes). Make sure all outdoor air dampers are closed. 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 65F 75F 85F 95F 105F 115F DIscharge +10psig 146 169 114 225 257 291 Suction +5 psig 75 76 78 79 80 82 TABLE 17 LG/LC Series 036S R−22 Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F DIscharge +10psig 162 186 211 244 276 312 Suction +5 psig 79 80 82 83 84 86 Outdoor Coil Entering Air Temp DIscharge +10psig Suction +5 psig 65F 75F 85F 95F 105F 115F 156 182 210 240 275 300 79 81 82 83 85 86 TABLE 20 LG/LC Series 042S R−22 Outdoor Coil Entering Air Temp DIscharge +10psig Suction +5 psig 65F 75F 85F 95F 105F 115F 165 190 218 254 283 319 75 75 77 79 81 83 TABLE 21 LG/LC Series 048H R−22 Outdoor Coil Entering Air Temp DIscharge +10psig Suction +5 psig 65F 75F 85F 95F 105F 115F 156 180 207 236 267 302 75 77 78 78 78 78 TABLE 22 LG/LC Series 048S R−22 Outdoor Coil Entering Air Temp DIscharge +10psig Suction +5 psig 65F 75F 85F 95F 105F 115F 163 188 217 246 280 317 72 73 75 76 77 79 TABLE 23 LG/LC Series 048H R−22 Humiditrol® TABLE 18 LG/LC Series 036H R−410A Std. & Humiditrol® Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F TABLE 19 LG/LC Series 042H R−22 DIscharge +10psig Suction +5 psig 237 272 312 356 404 456 131 132 134 138 143 150 Page 17 Outdoor Coil Entering Air Temp DIscharge +10 psig Suction +5 psig 65F 75F 85F 95F 105F 115F 157 188 219 249 280 310 75 77 79 81 83 85 TABLE 29 LG/LC Series 060H R−410A Humiditrol® TABLE 24 LG/LC Series 048H R−410A Std. & Humiditrol® Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F DIscharge +10 psig Suction +5 psig 255 291 332 376 425 477 134 135 137 139 142 146 TABLE 25 LG/LC Series 060H R−22 Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F DIscharge +10psig 165 192 221 253 287 323 DIscharge +10psig 174 184 221 247 284 334 Suction +5 psig 75 76 78 80 82 83 DIscharge +10 psig 169 201 233 265 297 329 Suction +5 psig 71 72 74 75 76 78 DIscharge +10psig 269 307 349 395 445 499 Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F DIscharge +10psig 185 210 238 269 304 338 Suction +5 psig 76 77 78 80 81 83 Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F DIscharge +10psig 191 224 258 292 326 360 Suction +5 psig 71 72 74 75 77 78 TABLE 32 LG/LC Series 072S R−22 Humiditrol® Suction +5 psig 72 74 76 79 81 84 Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F TABLE 28 LG/LC Series 060H R−410A Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F Suction +5 psig 126 131 133 137 139 145 TABLE 31 LG/LC Series 072S R−22 TABLE 27 LG/LC Series 060H R−22 Humiditrol® Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F DIscharge +10psig 275 321 367 412 459 506 TABLE 30 LG/LC Series 072H R−22 TABLE 26 LG/LC Series 060S R−22 Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F DIscharge +10 psig 196 221 248 283 316 353 Suction +5 psig 70 71 72 75 77 79 TABLE 33 LG/LC Series 072H R−410A Std. Suction +5 psig 131 134 136 139 141 143 Page 18 Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F DIscharge +10 psig Suction +5 psig 292 333 378 426 479 535 135 138 142 145 149 153 High Pressure Switch (S4) R−410A The compressor circuit is protected by a high pressure switch which opens at 640 psig + 10 psig (4413 kPa + 70 kPa) and automatically resets at 475 psig + 20 psig (3275kPa + 138 kPa). TABLE 34 LG/LC Series 072S R−410A Std. Outdoor Coil Entering Air Temp 65F 75F 85F 95F 105F 115F DIscharge +10 psig Suction +5 psig 301 342 386 437 488 547 130 133 136 141 145 149 2− Low Pressure Switch (S87) R−22 The compressor circuit is protected by a loss of charge switch. Switch cuts out at 25 psig (172 kPa) and automatically resets at 55 psig (379 kPa). Low Pressure Switch (S87) R−410A The compressor circuit is protected by a loss of charge switch. Switch opens at 40 psig + 5 psig (276 + 34 kPa) and automatically resets at 90 psig + 5 psig (621 kPa + 34 kPa). F−Charge Verification − Subcooling Method If ambient temperature is above 60F (15C), 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. 3− Freezestat (S49) The compressor is protected by a freezestat located on the indoor coil. The freezestat opens at 29F+3 (−2C+2) and closes at 58F+4 (14C+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. TABLE 35 SUBCOOLING R−22 Unit Temperature 036S, 042S, 042H, 048S, 072H Std. 10F + 1 (5.6C + 0.5) Humiditrol® 7F + 1 (3.9C + 0.5) 036H Std. & 048H Std. 12F + 1 (6.6C + 0.5) 060H Std. 11F + 1 (6.1C + 0.5) 072S Std. 19F + 1 (11C + 0.5) 060S Std. 14F + 1 (7.8C + 0.5) 048H Humiditrol® 072S Humiditrol® 16F + 1 ( 9C + 0.5) Humiditrol® 15F + 1 (8.3C + 0.5) 060H 5− Low Ambient Pressure Switch (S11) R−22 Switch maintains adequate discharge pressure by de−energizing condenser fan when liquid pressure falls below 140 psig +10 (965 kPa+69). S11 is installed in the liquid line. Switch closes to energize condenser fan when pressure rises to 275 psig +10 (1896kPa + 69). R−410A 036 Std. & Humiditrol® 072S, 048 Std. & Humiditrol® 8F + 1 (4.4C + 0.5) 9F + 1 (5.0C + 0.5) 060H Std. 11F + 1 (6.1C + 0.5) 060H Humiditrol 15F + 1 (8.3C + 0.5) 072H Std. 15F + 1 (8.3C + 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 450 psig + 10 psig (3103 kPa + 70 kPa) and automatically resets at 300 psig + 20psig (2069kPa + 138kPa). Page 19 Low Ambient Pressure Switch (S11) R−410A Switch maintains adequate discharge pressure by de−energizing condenser fan when liquid pressure falls below 240 psig +10 (1655 kPa+69). S11 is installed in the liquid line. Switch closes to energize condenser fan when pressure rises to 450 psig +10 (3103kPa + 69). 6− Discharge Line Thermostat (S40) 3 through 5 Ton Units Only Switch opens when discharge line temperature reaches 94F+5 (34C+3) and closes when temperature falls below 74F+5 (23C+3). Prevents crankcase heater operation in warm weather. Heating Start−Up WARNING FOR YOUR SAFETY READ BEFORE LIGHTING Danger of explosion and fire. Can cause injury or product or property damage. You must follow these instructions exactly. BEFORE LIGHTING smell all around the unit area for gas. Be sure to smell next to the floor because some gas is heavier than air and will settle on the floor. Use only your hand to push in or turn the gas control knob. Never use tools. If the knob will not push in or turn by hand do not try to repair it. Call a qualified service technician. Force or attempted repair may result in a fire or explosion. A−Placing Unit In Operation Gas Valve Operation for White Rodgers 36C (figure 16), White Rodgers 36E (figure 17), Honeywell VR8205M (figure 18), and Honeywell VR8205Q / VR8305Q (figure 19) This unit is equipped with an automatic spark ignition system. There is no pilot. In case of a safety shutdown, move thermostat switch to OFF and return the thermostat switch to HEAT to reset the ignition control. WARNING 1− Set thermostat to lowest setting. 2− Turn off all electrical power to appliance. 3− This appliance is equipped with an ignition device which automatically lights the burner. Do not try to light the burner by hand. WHITE RODGERS 36C76 GAS VALVE SMOKE POTENTIAL The heat exchanger in this unit could be a source of smoke on initial firing. Take precautions with respect to building occupants and property. Vent initial supply air outside when possible. STAGE 2 MANUAL MANIFOLD PRESSURE ADJUSTMENT SCREW UNDER CAP INLET PRESSURE TAP MANIFOLD PRESSURE TAP GAS VALVE SHOWN IN OFF" POSITION WARNING Danger of explosion. Can cause injury or product or property damage. If overheating occurs or if gas supply fails to shut off, shut off the manual gas valve to the unit before shutting off electrical supply. D−1 C−1 C2 GV−1 GV−2 WARNING FIGURE 16 Electric shock hazard. Can cause injury or death. Do not use this unit if any part has been under water. Immediately call a qualified service technician to inspect the unit and to replace any part of the control system and any gas control which has been under water. WHITE RODGERS 36E GAS VALVE WARNING NO 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. Page 20 OFF INLET PRESSURE TAP (SIDE) Gas valve knob is shown in OFF position. FIGURE 17 MANIFOLD PRESSURE TAP (SIDE) 7− 36C, VR8205, & 8305 − Turn the knob on the gas valve counterclockwise to ON". Do not force. 36E − Turn the knob 180° either way to ON". HONEYWELL VR8205M SERIES GAS VALVE INLET PRESSURE TAP MANIFOLD PRESSURE TAP 8− Close or replace the heat section access panel. 9− Turn on all electrical power to appliance. ON 10− Set thermostat to desired setting. OFF 11− The combustion air inducer will start. The burners will light within 40 seconds. Gas valve knob is shown in OFF position. 12− If the appliance does not light the first time (gas line not fully purged), it will attempt up to two more ignitions before locking out. FIGURE 18 HONEYWELL VR8205Q/VR8305Q SERIES GAS VALVE 13− If lockout occurs, repeat steps 1 through 10. HIGH FIRE ADJUSTMENT LOW FIRE ADJUSTMENT MANIFOLD PRESSURE TAP 14− If the appliance will not operate, follow the instructions Turning Off Gas to Appliance" and call your service technician or gas supplier. Turning Off Gas to Appliance 1− If using an electromechanical thermostat, set to the lowest setting. INLET PRESSURE TAP 2− Before performing any service, turn off all electrical power to the appliance. Gas valve knob is shown in OFF position. 3− Open or remove the heat section access panel. FIGURE 19 4− Open or remove the heat section access panel. 5− 36C, VR8205, & VR8305 − Turn the knob on the gas valve clockwise to OFF". Depress 36C knob slightly. Do not force. 36E − Turn the knob 180° either way to OFF". 6− Wait five (5) minutes to clear out any gas. If you then smell gas, STOP! Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions. If you do not smell gas, go to the next step. Page 21 4− 36C, VR8205, & VR8305 − to Turn the knob on the gas valve clockwise OFF". Depress 36C knob slightly. Do not force. 36E − Turn the knob 180° either way to OFF". 5− Close or replace the heat section access panel. WARNING Danger of explosion. Can cause injury or death. Do not attempt to light manually. Unit has a direct spark ignition system. 2− Burner flames may be observed through the inspection port in the access panel. Always operate the unit with the access panel in place. Heating Operation and Adjustments A−Heating Sequence of Operation 1− When the thermostat calls for heat, the combustion air blower starts immediately. WARNING 2− The combustion air switch checks for proper blower operation before allowing power to the ignition controller. This switch is factory set and no adjustment is necessary. Danger of explosion. Can cause injury or death. Do not overtighten main burner mounting screws. Snug tighten only. 3− After a pre−purge of 45 seconds, the spark ignitor is energized, and the solenoid valve opens in the gas valve. 3− The gap on the flame sensing electrode should be between 3/32" and 5/32" (0.094 − 0.156 mm). Remove right burner by removing screw and sliding the burner off the orifice. The carry over slot on all burners is 1/8" (.125 mm) and it must be maintained. Clean the carry over slot using a strip of 16 gauge steel. Check gap with 1/8" (.125mm) twist drill. Replace all burners using mounting screws. 4− The spark then ignites the gas, the ignition sensor proves the flame and the combustion process continues. 5− In the event that the flame is not detected after the first trial for ignition, the controller will repeat steps 3 and 4 up to two more times (depending upon controller model) before locking out. 6− For troubleshooting purposes, an ignition attempt after lock out may be re−established manually. Move thermostat OFF" and return thermostat switch to HEAT" position. B−Limit Control Limit controls are factory set and not adjustable. 4− Gas manifold pressures should match pressures shown in table 36. On two stage gas valves, initiate a W2 thermostat demand to check high fire pressure before low fire pressure. With high fire operating, reduce the thermostat demand to W1 and check the low fire pressure. Refer to the IMC manual to initiate a thermostat demand. IMPORTANT − Do not set low fire pressure lower than the certified minimum input rating listed in table 36. Two primary limits are located on the division panel between the return and supply sections on high heat units. One primary limit is located on the division panel on standard heat units. A secondary limit is located on the blower transition in both standard and high heat units. C−Heating Adjustment 1− Main burners are factory adjusted for proper flame. Air shutters are provided for localized areas if necessary. Page 22 TABLE 36 MANIFOLD INPUT PRESSURES in.wg. (kPa) Natural Gas Propane (LP) Gas 1st Stage + 0.2 (+.05) 2nd Stage + 0.3 (+.08) 1st Stage + 0.2 (+.05) 2nd Stage + 0.3 (+.08) 036, 042, 048, 060, 072 Std./High Heat NA 3.5 (0.87) NA 10.5 (2.61) 042, 048, 060, 072 Dual Heat 1.9 (0.47) 3.5 (0.87) 5.3 (1.32) 10.5 (2.61) LGA/LGC Unit Humiditrol® Start−Up And Operation General Humiditrol® units provide a dehumidifying mode of operation. These units contain a reheat coil adjacent to and downstream of the evaporator coil. Reheat coil solenoid valve, L14, routes hot discharge gas from the compressor to the reheat coil. Return air pulled across the evaporator coil is cooled and dehumidified; the reheat coil adds heat to supply air. See figure 20 for reheat refrigerant routing and figure 21 for standard cooling refrigerant routing. REHEAT MODE REFRIGERANT ROUTING RETURN AIR EVAPORATOR COIL OUTDOOR AIR EXPANSION VALVE REHEAT COIL SUPPLY AIR COMPRESSOR CONDENSER COIL CHECK VALVE REHEAT VALVE FIGURE 20 COOLING MODE REFRIGERANT ROUTING RETURN AIR EVAPORATOR COIL OUTDOOR AIR EXPANSION VALVE REHEAT COIL SUPPLY AIR COMPRESSOR CHECK VALVE REHEAT VALVE FIGURE 21 Page 23 CONDENSER COIL RH1 BOARD LOCATION ON M1 BOARD A67 (RH1) A55 (M1): A56 (EM1) A67 (RH1) RH1 REHEAT CONTROL BOARD P175 HUMIDITROL® PLUG YELLOW LED INDICATES OUTPUT TO L14 REHEAT VALVE FLASHING GREEN HEARTBEAT" LED INDICATES NORMAL OPERATION 1 FIGURE 22 L14 Reheat Coil Solenoid Valve Read Relative Humidity At IMC When IMC board input (P114−10) indicates room conditions require dehumidification, L14 reheat valve is energized (RH1 board P175−3) and refrigerant is routed to the reheat coil. Turn MODE DIP TEMP" ON". Display will alternately flash from readout to output. A single push on the pushbutton will toggle advance to different sensor readings. A double push will toggle the readout the opposite direction. Once readout rH" is displayed alternately with the output, use table 37 to determine the percent relative humidity. TABLE 37 RH1 Humiditrol® Board The RH1 add−on board is factory−installed in all Humiditrol® units. RH1 is located on the M1 board as shown in figure 22. Relative Humidity (%RH + 3%) 20 30 40 50 60 70 80 90 Reheat Setpoint Reheat is factory−set to energize when indoor relative humidity rises above 60% (default). The reheat setpoint can be adjusted by changing ECTO 4.25. A setting of 100% will operate reheat from an energy management system digital output. The reheat setpoint can also be adjusted using an optional Network Control Panel (NCP). Sensor Output (VDC) 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 Check−Out Reheat will terminate when the indoor relative humidity falls 3% (57% default) or the digital output de−energizes. The reheat deadband can be adjusted 1−10% RH by changing ECTO 4.26. Test Humiditrol operation using the following procedure. A91 Humidity Sensor 3− For RH sensors, set IMC ECTO reheat setpoint parameter 4.25 to 0% relative humidity. For digital input, set IMC ECTO reheat setpoint parameter 4.25 to 100% relative humidity. 1− Make sure reheat is wired as shown in wiring section. 2− Set IMC ECTO system mode parameter 6.01 to option 0 (default local thermostat mode) Install humidity sensor in the conditioned space according to instructions provided with sensor. Relative humidity should correspond to the sensor (A91) output voltage listed in table 37. For example: if indoor air relative humidity is 80% + 3%, the humidity sensor output should read 8.00VDC. Check the sensor output annually for accuracy. Keep the air intake openings on the sensor clean and free of obstructions and debris. 4− Jumper the following TB1 terminals: 8 & 9 (occupied mode) 6 & 3 (blower demand G) 24 & 6 (digital input applications only) The blower, compressor 1 (reheat) should be operating. L14 LED on the A67 board should also be ON, indicating the reheat valve is energized. Page 24 5− Press the IMC pushbutton to by−pass the compressor minimum run delay. ECTO 4.24 option 7 − 3− System must NOT be operating in heating mode. 6− For RH sensors, disconnect the jumper between TB1 terminals 8 & 9 (occupied mode). For digital input, remove the jumper between TB1−6 & 24. Once the corresponding conditions are met in each mode, reheat will operate as shown in table 38. Compressor 1 (reheat) should de−energize, L14 LED should go OFF, blower should still be energized. TABLE 38 Reheat Operation T’stat and Humidity Demands 8− When check−out is complete, remove all jumpers, set ECTO 4.25 back to the proper humidity setpoint, and set ECTO 6.01 to the proper setting. Default Reheat Operation Humiditrol unit reheat control parameter 4.24 is factory−set to option 6. Reheat will operate as shown in table 38 once three conditions are met: 1− Blower must be operating. Operation Reheat Only Compressor Reheat Reheat & Y1 Compressor Cooling* *If there is no reheat demand and outdoor air is suitable, free cooling will operate. Combination of Demands 3− System must NOT be operating in heating mode. Table 38 shows unit operation at reheat and thermostat demands. The following examples show unit operation when reheat and thermostat demands overlap. IMPORTANT − Free cooling does not operate during reheat. Free cooling will operate as shown in the IMC manual. 1− Compressor is operating (Y1) and a reheat demand is initiated: No change in operation. 2− System must be in occupied mode. Reheat Control Options Reheat control parameter 4.24 can be set to other reheat control operating conditions as follows (see IMC manual): ECTO 4.24 option 3 − 1− Blower must be operating. 2− System must be in occupied mode. 3− System must NOT be operating in heating mode. 4− One cooling demand is required if the unit has been in heating mode, the IMC has been reset, or at initial unit start−up. ECTO 4.24 option 5 − 3− System must NOT be operating in heating mode. 4− One cooling demand is required if the unit has been in heating mode, the IMC has been reset, or at initial unit start−up. Page 25 2− Compressor reheat is operating and outdoor air IS NOT SUITABLE for free cooling; then a Y1 cooling demand is initiated: Compressor is not de−energized; L14 reheat valve is de−energized for compressor cooling. 3− Compressor reheat is operating and outdoor air IS SUITABLE for free cooling; then a Y1 cooling demand is initiated: Compressor is not de−energized; L14 reheat valve is de−energized for compressor cooling. Free cooling is not allowed if a reheat demand is present. C−Burners Service 1− Periodically examine burner flames for proper appearance during the heating season. Use inspection port in the front of the burner compartment access panel. The unit should be inspected once a year by a qualified service technician. WARNING Product contains fiberglass wool. Disturbing the insulation in this product during installation, maintenance, or repair will expose you to fiberglass wool. 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. P.O. Box 799900 Dallas, TX 75379−9900 2− Before each heating season examine the burners for any deposits or blockage which may have occurred. 3− Clean burners as follows: a−Turn off both electrical power and gas supply to unit. b−Remove access panel to burner compartment. c−Remove burner mounting screws and lift burners from orifice. d−Clean as necessary and replace burners and secure with mounting screws. Make sure that burner heads line up correctly. Spark gaps on ignitor and flame sensing electrode must be properly set. Refer to Heating Adjustment section. Replace access panel. A−Lubrication All motors and blower shaft bearings are prelubricated. No further lubrication is needed. WARNING B−Filters Unit is equipped with two 16 X 25 X 2" pleated throw−away type filters. Filters should be checked monthly and replaced when necessary. See figure 23. Danger of explosion. Can cause injury or death. Do not overtighten main burner mounting screws. Snug tighten only. NOTE−Filters must be U.L.C. certified or equivalent for use in Canada. e− Restore electrical power and gas supply. Follow lighting instructions located on inside panel. Use inspection port in access panel to check flame. FILTER REMOVAL D−Combustion Air Inducer A combustion air blower motor proving switch, S18, checks combustion air inducer operation before allowing power to the gas controller. Gas controller will not operate if inducer is obstructed. Under normal operating conditions, the combustion air inducer wheel should be checked and cleaned prior to the heating season. However, it should be examined periodically during the heating season to establish an ideal cleaning schedule. With power supply disconnected, the condition of the inducer wheel can be determined by looking through the vent opening. FIGURE 23 Page 26 F−Condenser Coil Cleaning Combustion Air Inducer and Vent Cap 1− Shut off power supply and gas to unit. WARNING 2− Remove the heat access panel. Disconnect motor wires & three motor mounting screws. 3− Clean inducer wheel with a small brush and wipe off any dust from housing. See figure 24. Clean accumulated dust from front of flue box cover. Inspect flue passageway and flue box when removing the combustion air inducer. If cleaning is necessary use wire brush. CLEAN INDUCER WHEEL WITH BRUSH 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. Clean condenser coil annually with detergent or commercial coil cleaner and inspect monthly during the cooling season. Formed condenser coils are made of individual coil slabs. Dirt and debris may become trapped between the slabs. To clean between slabs, carefully separate coil slabs and wash them thoroughly. See figure 25. G−Supply Air Blower Wheel Annually inspect supply air blower wheel for accumulated dirt or dust. Turn off power before attempting to remove access panel or to clean blower wheel. FIGURE 24 4− Replace combustion air inducer motor by reversing this procedure. It is recommended that the combustion air inducer gasket (if present) be replaced during reassembly. 5− Clean combustion air supply (hood located on heat access panel) using a small brush. FORMED COIL CLEANING PROCEDURE SEPARATE THIS END ONLY EVAPORATOR E−Evaporator Coil HEAT SECTION 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. Inspect and clean coil at beginning of each cooling and heating season. Clean using mild detergent or commercial coil cleaner. Flush coil and condensate drain with water taking care not to get insulation, filters, return air ducts wet. Page 27 1−Remove rear and corner mullion holding coil. 2−Remove clips connecting coil slabs and separate slabs 3"−4" (76 mm−102mm). 3−Clean coils with detergent or commercial coil cleaner. 4−Rinse thoroughly with water and reassemble. FIGURE 25
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