Lennox LCM036 Installation Instructions Manual Download Page 29 | Manualshive

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Page 29

LGM/LCM036, 048, 060, 074

REHEAT MODE REFRIGERANT ROUTING

REHEAT

COIL

EVAPORATOR

REHEAT

VALVE

RETURN

AIR

CONDENSER

COIL

OUTDOOR

AIR

COMPRESSOR

SUPPLY

AIR

CHECK

VALVE

EXPANSION

VALVE

FIGURE 25

COIL

COOLING MODE REFRIGERANT ROUTING

REHEAT

COIL

EVAPORATOR

REHEAT

VALVE

RETURN

AIR

CONDENSER

COIL

OUTDOOR

AIR

COMPRESSOR

SUPPLY

AIR

CHECK

VALVE

EXPANSION

VALVE

FIGURE 26

COIL

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Summary of Contents for LCM036

Page 1: ...ors Page 22 Cooling Operation Page 25 INSTALLATION INSTRUCTIONS LGM LCM036 048 060 074 3 4 5 and 6 Ton GAS AND COOLING PACKAGED UNITS 508108 01 1 2021 CAUTION As with any mechanical equipment contact...

Page 2: ...3 29 737 7 178 BOTTOM RETURN AIR OPENING BOTTOM CONDENSATE OUTLET 25 3 4 654 BOTTOM POWER ENTRY 3 X 8 76 X 203 18 3 8 467 19 1 2 495 5 1 2 140 FORKLIFT SLOTS Front Back and Blower End HORIZONTAL RETUR...

Page 3: ...L GAS VALVE BURNERS COMBUSTION AIR INDUCER BLOWER DIRECT DRIVE TXV UNIT CONTROLLER REHEAT COIL OPTIONAL COIL GUARDS OPTIONAL LCM036 048 060 074 PARTS ARRANGEMENT 8 8 8 8 ELECTRIC HEAT Optional EVAPORA...

Page 4: ...recycling or reclaiming must be followed Fines and or incar ceration may be levied for non compliance WARNING Electric shock hazard and danger of explosion Can cause injury death or product or propert...

Page 5: ...The 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 retur...

Page 6: ...the separately ordered horizontal air discharge kit Place the kit panel over the downflow return air opening 4 Remove and retain the barometric relief dampers and lower hood FIGURE 3 DOWNFLOW RETURN...

Page 7: ...e of the mullion FIGURE 7 CONDENSATE DRAIN MULLION Two hinge screws must be removed in addition to the mullion screws See figure 8 FIGURE 8 CONDENSATE DRAIN MULLION REMOVE TWO SCREWS UNITS WITH HINGED...

Page 8: ...the unit gas connection must be as shown in table 1 TABLE 1 OPERATING PRESSURE AT GAS CONNECTION w c Natural Gas LP Propane Gas Min Max Min Max 036 074 4 5 10 5 11 13 When making piping connections a...

Page 9: ...for gas leaks 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...

Page 10: ...inal to the 208V terminal Place the insulated terminal cover on the unused 240V terminal 2 Route power through the bottom power entry area and connect to L1 L2 and L3 on the top of K1 in control area...

Page 11: ...ic thermostats If using other temperature control devices or energy management systems see instructions and wiring diagram provided by manufacturer IMPORTANT Terminal connections at the wall plate or...

Page 12: ...onductors with overall shield Belden type 8760 or 88760 plenum or equivalent Connect both cable shield drain wires to the Unit Controller as shown in figure 17 FIGURE 17 FIELD WIRING REHEAT UNITS Usin...

Page 13: ...witch Voltage must be within range listed on nameplate If not consult power company and have voltage condition corrected before starting unit 5 Make sure filters are new and in place before start up B...

Page 14: ...oling typically 60 of full load CFM TABLE 4 DIRECT DRIVE PARAMETER SETTINGS Parameter Factory Setting Field Setting Description 036 048 060 074 Note Any changes to Smoke CFM setting must be adjusted b...

Page 15: ...84 326 2024 354 2062 380 2100 403 2137 426 2174 448 2211 474 2248 499 2285 525 2322 553 2359 582 1700 2007 319 2045 346 2083 373 2120 399 2157 423 2193 445 2229 466 2264 489 2300 516 2336 544 2372 573...

Page 16: ...2067 396 2109 425 2151 453 2193 481 2235 507 2277 532 2318 558 2358 585 2397 614 1700 1987 321 2033 352 2078 382 2122 412 2163 441 2204 469 2244 498 2286 525 2327 551 2368 578 2408 606 2446 638 2484...

Page 17: ...04 458 2245 484 2286 511 2327 538 2366 567 2403 598 1800 1998 318 2041 347 2085 375 2128 402 2171 427 2213 451 2254 475 2294 500 2334 528 2374 557 2412 588 2449 621 2484 655 1900 2102 341 2143 371 218...

Page 18: ...81 2397 609 2434 638 1700 2030 345 2078 377 2126 409 2170 439 2212 469 2253 498 2294 526 2336 553 2376 579 2415 606 2453 635 2490 668 2525 703 1800 2141 391 2187 423 2231 454 2274 484 2315 514 2356 54...

Page 19: ...TA Air Volume cfm 1 Effective Throw ft RTD11 95S FD11 95S 2600 24 29 19 24 2800 25 30 20 28 3000 27 33 21 29 1 Effective throw based on terminal velocities of 75 ft per minute FACTORY INSTALLED OPTION...

Page 20: ...ing pressures Pressures are listed for sea level applications at 80 F dry bulb and 67 F wet bulb return air 4 Compare the normal operating pressures to the pressures obtained from the gauges Minor var...

Page 21: ...on each unit Optional controls are identified on wiring diagrams by arrows at junction points 1 High Pressure Switch S4 The compressor circuit is protected by a high pressure switch which opens at 640...

Page 22: ...n addition the Unit Controller uses these temperatures to initiate alarms such as loss of condenser or evaporator airflow and loss of charge Each thermistor must be specifically placed for proper unit...

Page 23: ...THERMISTOR LOCATION RT42 46 060U 074 FOUR ROW EVAPORATOR COIL VIEW FROM FRONT SIDE OF UNIT FIGURE 22 RT42 RT46 DISTRIBUTOR TUBE CLAMP THERMISTOR TO BARE COPPER NOT THE DISTRIBUTOR SLEEVE SUCTION LINE...

Page 24: ...Page 24 LGM LCM036 048 060 074 THERMISTOR LOCATION RT44 RT48 036 048 CONDENSER COIL VIEW FROM FRONT SIDE OF UNIT FIGURE 23 RT48 RT44 LIQUID LINE EXIT...

Page 25: ...mper has been at full open for three minutes Note Free cooling is locked out when a dehumidification demand is received The unit operates in dehumidification mode as if the outdoor air is not suitable...

Page 26: ...y to repair it Call a qualified service technician Force or attempted repair may result in a fire or explosion WARNING Danger of explosion Can cause injury or death Do not attempt to light manually Un...

Page 27: ...shes Ignition lockout from too many trials 4 Flashes Ignition lockout from too many flame losses within single call for heat 5 Flashes Control hardware fault detected C Limit Controls Limit controls a...

Page 28: ...energized Pressure can be checked on the reheat line pressure tap Pressure on the reheat line should match discharge pressure closely in reheat mode Default Reheat Operation During reheat mode free co...

Page 29: ...EHEAT VALVE RETURN AIR CONDENSER COIL OUTDOOR AIR COMPRESSOR SUPPLY AIR CHECK VALVE EXPANSION VALVE FIGURE 25 COIL COOLING MODE REFRIGERANT ROUTING REHEAT COIL EVAPORATOR REHEAT VALVE RETURN AIR CONDE...

Page 30: ...filter frame when reinstalling filters See figure 27 NOTE Filters must be U L C certified or equivalent for use in Canada B Lubrication All motors are lubricated at the factory No further lubrication...

Page 31: ...TUH 5 BURNERS 65 000 BTUH 3 BURNERS SENSOR IGNITOR SENSOR IGNITOR SENSOR IGNITOR D Combustion Air Inducer Gas Units A combustion air proving switch checks combustion air inducer operation before allow...

Page 32: ...season Clean using mild detergent or commercial coil cleaner Flush coil and condensate drain with water taking care not to get insulation filters and return air ducts wet G Condenser Coil Clean conden...

Page 33: ...et See figure 34 Retain the screw to secure the back side of the ionizer bracket 2 Remove two screws securing the front side of the ionizer bracket and pull out of unit and clean brushes 3 Replace ion...

Page 34: ...touching the lamps Then carefully remove the old lamp from the lamp holder clips 7 Wear cotton gloves or use a cotton cloth when handling the new lamp Place the new lamp in the holder clips of the UV...

Page 35: ...and federal disposal laws Refer to www lamprecycle org or call 800 953 6669 Proper Clean up Technique in Case of Lamp Breakage Wear protective gloves eye wear and mask Sweep the broken glass and debr...

Page 36: ...ption installed Change the appropriate character in the configuration I D For example when an economizer is installed using a single enthalpy sensor change configuration I D 1 the second character to...

Page 37: ...Stage D Unconfigured U Power Exhaust Control 4 Not Installed N Damper Position A A34 Pressure Sensor C 5 Network Module N Not Installed L LonTalk Lennox 6 Blower Variable Frequency Drive Bypass N Not...

Page 38: ...lled 1 Air Flow Proving Switch S52 3 Overflow Switch S149 S179 4 Reserved Reserved for future use N 7 Zone Bypass Damper N Not Installed Y Installed FIGURE 40 10 Reserved N Not Installed Not Installed...

Page 39: ...voltage __________ Cooling Checks Compressor Rotation Ambient Temp ________Return Air Temp ________ Supply Air Temp ________ Compressor Amps Compressor Volts Pressures Condenser Fan Amps CC Heater Am...

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