Lennox LGH240H

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Page 27

507124-04 3/2016

70

80

90

100

110

120

110 115 120 125 130 135 140 145 150 155 160 165 170

LGH/LCH156 CHARGING CURVE CIRCUIT 3

Suction Pressure (psig)

Outdoor Temperature (°F)

115°

105°

95°

85°

75°

65°

175 180

130

Table of Contents

Table of Contents1
Unit Dimensions2
Parts Arrangement Diagram5
Requirements6
Shipping and Packing List6
General6
Downflow Discharge Application7
Unit Support7
Horizontal Discharge Applications8
Duct Connection8
Rigging Unit for Lifting8
Condensate Drains8
Connect Gas Piping9
Pressure Test Gas Piping10
High Altitude Derate10
Electrical Connections10
- Wire Routing11
- Zone Sensor Mode11
- Thermostat Location11
- Control Wiring11
- Hot Gas Reheat Units Only12
- Humidity Sensor Cable Applications12
- Minimum and Maximum Pulley Adjustment13
- Blower Access13
Blower Operation and Adjustments13
- Blower Belt Adjustment14
- Blower Assembly - no Tensioner14
- Location of Static Pressure Readings14
- Pulley Alignment - no Tensioner15
- Pulley Alignment - with Tensioner15
- Check Belt Tension16
- Field-Furnished Blower Drives16
- Blower Data17
- Blower Data18
- Preliminary Checks20
Cooling Start-Up20
- Refrigerant Circuits View21
- Refrigerant22
- Refrigerant Charge and Check - All-Aluminum Coils23
- Normal Operating Pressures23
- Charging Curve Circuits26
- Refrigerant Charge and Check - Fin/Tube Coil36
- Charge Verification - Approach Method - AHRI Testing (Fin/Tube Coil)38
- Compressor Controls38
- Freezestats39
- Gas Heat Start-Up (Gas Units)40
- Placing Unit in Operation41
- Turning off Gas to Unit41
- Set Maximum CFM42
- Electric Heat Start-Up (LCH Units)42
Heating Operation and Adjustments42
Supply Air Inverter Start-Up42
- Set Blower Speeds43
- Set Damper Minimum Position43
- Blower CFM Design Specifications43
- Inverter Bypass Option44
- Minimum and Maximum CFM44
Supply Air Inverter Operation46
- Hot Gas Reheat Start-Up and Operation48
- Humidity Sensor48
- Default Reheat Operation48
- Reheat Setpoint48
- Refrigerant Routing Diagrams49
- Reheat Operation51
- Lubrication52
- Burners (Gas Units) Maintenance52
- Filters52
Service52
- Combustion Air Inducer (Gas Units) Maintenance53
- Factory Unit Controller Settings54
- Flue Passageway and Flue Box (Gas Units)54
- Supply Air Blower Wheel Maintenance54
- Condenser Coil Maintenance54
Unit Controller Parameter Settings54
- Configuration ID 158
- Configuration ID 259

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