Lennox Humiditrol L Series Installation Instructions Manual
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Lennox Humiditrol L Series Installation Instructions Manual

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Litho U.S.A.
2001
WARNING
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser
vice must be performed by a qualified installer, ser
vice agency or the gas supplier
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RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
08/01
*2P0801*

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INSTALLATION
INSTRUCTIONS
Humiditrolt
LGA/LCA 036H,
048H, & 060H
(3, 4, & 5 TON)
L SERIES PACKAGED UNITS
504,417M
8/2001
Supersedes 4/2001
1
2
3
3
3
4
5
5
5
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LGA SHOWN
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504,417M
*P504417M*
6
6
7
9
14
16
18
19
21

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  • Page 1: Table Of Contents

    INSTALLATION INSTRUCTIONS Litho U.S.A. 2001 Humiditrolt WARNING LGA/LCA 036H, Improper installation, adjustment, alteration, ser 048H, & 060H vice or maintenance can cause property damage, personal injury or loss of life. Installation and ser vice must be performed by a qualified installer, ser (3, 4, &...

  • Page 2: Dimensions

    LGA/LCA036−072 Unit Dimensions − Inches (mm) BOTTOM CONDENSER RETURN AIR OPTIONAL OUTDOOR COIL INTAKE CONDENSER COIL OPENING AIR HOOD (Factory or 4 1/2 4 1/2 Field Installed) (114) (114) EVAPORATOR BOTTOM (711) COIL 4 1/2 (356) REHEAT SUPPLY AIR 14 (356) CENTER OF COIL (114)

  • Page 3: Parts Arrangements

    LGA/LCA036−072 Parts Arrangement CONDENSER FAN HEAT EXCHANGER REHEAT COIL EVAPORATOR COIL FILTERS ECONOMIZER (OPTIONAL) COMPRESSOR COMBUSTION AIR INDUCER CONDENSATE DRAIN GAS VALVE DISCONNECT BURNERS (OPTIONAL) BLOWER 120V GFI OUTLET (OPTIONAL) CONDENSER FAN REHEAT COIL EVAPORATOR COIL FILTERS ECONOMIZER (OPTIONAL) COMPRESSOR ELECTRIC HEAT CONDENSATE...

  • Page 4: Shipping And Packing List

    Shipping and Packing List CAUTION Package 1 of 1 contains: Danger of sharp metallic edges. Can cause injury. Take care when servicing unit to avoid accidental 1− Assembled unit contact with sharp edges. IMPORTANT − This unit requires specific field−provided installed humidity sensor...

  • Page 5: Duct Connection

    5− Units require support along all four sides of unit base. Rigging Unit For Lifting Supports must be constructed of steel or suitably treated wood materials. Rig unit for lifting by attaching four cables to holes in unit base rail. See figure 4. NOTE−When installing the unit on a combustible surface for downflow discharge applications, the LARMF roof 1−...

  • Page 6: Condensate Drains

    Condensate Drains GAS PIPE CONNECTION FIELD PROVIDED Make drain connection to the 3/4" N.P.T. drain nipple 1/8" PRESSURE TAP GROUND provided on unit. A trap must be installed between drain JOINT UNION connection and an open vent for proper condensate removal.

  • Page 7: High Altitude Derate

    High Altitude Derate INTAKE HOOD Units must be derated when installed at altitudes above 4500 feet (610 m) above sea level. At altitudes above NOTE: CAULK EACH SIDE 4500 feet (610 m), units must be derated to match the gas TOP SEAL OF TOP SEAL (FIELD PRO manifold pressures shown in table 1.

  • Page 8: Electrical Connections

    B−Control Wiring Electrical Connections − Power Supply 1− Route thermostat cable or wires from subbase Do not apply power or close disconnect switch until through conduit provided in unit. Refer to wiring installation is complete. Refer to start−up directions. Refer diagram on unit.
  • Page 9 24 VOLT FIELD WIRING WITH IMC SET IN LOCAL THERMOSTAT MODE (ECTO 6.01 OPTION 0) JUMPER TERMINALS 8 & 9 Note − On electro−mechanical ther WHEN THERMOSTAT HAS NO mostats set anticipator at 0.1 amps. NIGHT SETBACK TERMINALS 3 4 5 6 8 9 10 1112 13 14 15 16 17 20 21...

  • Page 10: Blower Operation And Adjustments

    Blower Operation and Adjustments BLOWER SPEED ADJUSTMENT TO INCREASE BELT TENSION NOTE − These units must not be used as a construction 1 − Loosen 2 locking bolts. 2 − Pull motor mounting plate. heater" at any time during any phase of construction. 3 −...
  • Page 11 TABLE 2 LGA036−072 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) (L/s) (kW) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
  • Page 12 TABLE 3 LCA036−072 BELT DRIVE BLOWER PERFORMANCE TOTAL STATIC PRESSURE Inches Water Gauge (Pa) Volume .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) (L/s) (kW) (kW) (kW) (kW) (kW) (kW) (kW)
  • Page 13 E−Blower Table Notes 3− Any field installed accessories air resistance (horizontal roof frame, diffuser, etc.). See tables 5 Blower tables include resistance for base units only with through 9. two−row dry indoor coil and air filters in place. For all other Use the blower table to determine blower motor units: output and drives required.
  • Page 14 TABLE 6 TABLE 8 RTD9−65 CEILING DIFFUSER AIR RESISTANCE FD9−65 CEILING DIFFUSER AIR RESISTANCE Effective Throw Effective Throw Air Volume ft. (m) Air Volume 1000 10−17 3−5 1000 15−20 5−6 1200 11−18 3−5 1200 16−22 5−7 1400 12−19 4−6 1400 17−24 5−7 1600...

  • Page 15: Cooling Start−Up

    4− Reverse any two field−installed wires connected to Cooling Start−Up the line side of S48 disconnect or TB2 terminal strip. IMPORTANT−The crankcase heater (standard on Do not reverse wires at blower contactor. some models) must be energized for 24 hours before attempting to start compressor.
  • Page 16 TABLE 12 TABLE 15 SUBCOOLING LGA/LCA036H Humiditrolt Units Unit Temperature Outdoor Coil DIscharge Suction +5 Entering Air Temp +10 psig psig LGA/LCA036H Humiditrol Units 14_F + 1 (7.7_C + 1) 65_F LGA/LCA048H Humiditrol Units 16_F + 1 ( 9_C + 1) 75_F LGA/LCA060H Humiditrol Units 15_F + 1 (8.3_C + 1)

  • Page 17: Heating Start−Up

    Heating Start−Up WARNING FOR YOUR SAFETY READ BEFORE LIGHTING Danger of explosion and fire. Can cause injury or product or property damage. BEFORE LIGHTING smell all around the unit area for You must follow these instructions gas. Be sure to smell next to the floor because some gas exactly.
  • Page 18 7− 36C, VR8205, & 8305 − HONEYWELL VR8205M SERIES GAS VALVE Turn the knob on the gas valve counterclockwise INLET MANIFOLD to ON". Do not force. PRESSURE PRESSURE 36E − Turn the knob 180³ either way to ON". 8− Close or replace the heat section access panel. 9−...

  • Page 19: Heating Operation And Adjustments

    C−Heating Adjustment Heating Operation and Adjustments 1− Main burners are factory adjusted for proper flame. A−Heating Sequence of Operation Air shutters are provided for localized areas if necessary. 1− When the thermostat calls for heat, the combustion air blower starts immediately. 2−...

  • Page 20: Humiditrolt Start−Up And Operation

    solenoid valve, L14, routes hot discharge gas from the Humiditrolt Start−Up And Operation compressor to the reheat coil. Return air pulled across General the evaporator coil is cooled and dehumidified; the Humiditrol units provide a dehumidifying mode of reheat coil adds heat to supply air. See figure 19 for operation.
  • Page 21 A67 (RH1) BOARD LOCATION ON M1 BOARD A67 (RH1) A55 (M1): (RH1) (EM1) FLASHING GREEN P175 HEARTBEAT" LED HUMIDITROL INDICATES NORMAL YELLOW LED A67 (RH1) REHEAT PLUG OPERATION INDICATES OUTPUT TO CONTROL BOARD L14 REHEAT VALVE FIGURE 21 L14 Reheat Coil Solenoid Valve Check−Out Test Humiditrol operation using the following procedure.

  • Page 22: Service

    Reheat Operation − General Service The following conditions must be met before reheat will be The unit should be inspected once a year by a qualified energized: service technician. 1− Blower must be operating. WARNING 2− System must be in occupied mode. Product contains fiberglass wool.
  • Page 23 C−Burners 3− Clean inducer wheel with a small brush and wipe off any dust from housing. See figure 23. Clean 1− Periodically examine burner flames for proper appearance during the heating season. Use accumulated dust from front of flue box cover. Inspect inspection port in the front of the burner compartment flue passageway and flue box when removing the access panel.
  • Page 24 F−Condenser Coil dirt or dust. Turn off power before attempting to remove access panel or to clean blower wheel. WARNING FORMED COIL CLEANING PROCEDURE Electric shock hazard. Can cause SEPARATE THIS END ONLY injury or death. Before attempting to perform any service or maintenance, turn the electrical power to unit OFF at EVAPORATOR disconnect switch(es).

This manual is also suitable for:

Humiditrol lga036hHumiditrol lga048hHumiditrol lga060hHumiditrol lca036hHumiditrol lca048hHumiditrol lca060h

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