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Lennox LGH102H4M User Manual

Lennox LGH102H4M
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Page 8
SPECIFICATIONS - 092H, 102H
General Data Nominal Tonnage 7.5 Ton 7.5 Ton 8.5 Ton 8.5 Ton
Model Number LGH092H4B LGH092H4M LGH102H4B LGH102H4M
Efciency Type High High High High
Blower Type Constant Air
Volume CAV
(Multi-Stage Air
Volume)
Constant Air
Volume CAV
(Multi-Stage Air
Volume)
Cooling
Performance
Gross Cooling Capacity - Btuh 93,000 93,000 103,800 103,800
1
Net Cooling Capacity - Btuh 90,000 90,000 100,000 100,000
AHRI Rated Air Flow - cfm 3000 2800 3400 3400
Total Unit Power - kW 7.5 7.5 8.1 8.1
1
EER (Btuh/Watt) 12.5 12.5 12.2 12.2
2
IEER (Btuh/Watt) 13.0 14.0 12.9 14.0
Refrigerant Type R-410A R-410A R-410A R-410A
Refrigerant
Charge
All-Aluminum Coil
System
Circuit 1 7 lbs. 8 oz. 7 lbs. 8 oz. 7 lbs. 8 oz. 7 lbs. 8 oz.
Circuit 2 7 lbs. 8 oz. 7 lbs. 8 oz. 7 lbs. 8 oz. 7 lbs. 8 oz.
Conventional Fin/Tube
Coil Option
Circuit 1 13 lbs. 8 oz. 13 lbs. 8 oz. 13 lbs. 8 oz. 13 lbs. 8 oz.
Circuit 2 12 lbs. 8 oz. 12 lbs. 8 oz. 12 lbs. 8 oz. 12 lbs. 8 oz.
Conventional Fin/Tube
With Humiditrol
®
Circuit 1 17 lbs. 0 oz. 17 lbs. 0 oz. 17 lbs. 0 oz. 17 lbs. 0 oz.
Circuit 2 12 lbs. 8 oz. 12 lbs. 8 oz. 12 lbs. 8 oz. 12 lbs. 8 oz.
Gas Heating Options Available - See page 10 Standard (2 Stage), Medium (2 Stage), High (2 Stage)
Compressor Type (number) Scroll (2) Scroll (2) Scroll (2) Scroll (2)
Outdoor Coils
Aluminum
(Fin/Tube)
Net face area (total) - sq. ft. 28.0 (29.33) 28.0 (29.33) 28.0 (29.33) 28.0 (29.33)
Number of rows 1 (3) 1 (3) 1 (3) 1 (3)
Fins per inch 20 (20) 20 (20) 20 (20) 20 (20)
Outdoor
Coil Fans
Motor - (No.) hp (2) 1/3 (2) 1/3 (2) 1/3 (2) 1/3
Motor rpm 1075 1075 1075 1075
Total Motor watts 800 800 800 800
Diameter - (No.) in. (2) 24 (2) 24 (2) 24 (2) 24
Number of blades 3 3 3 3
Total Air volume - cfm 8800 8800 8800 8800
Indoor
Coils
Net face area (total) - sq. ft. 12.78 12.78 12.78 12.78
Tube diameter - in. 3/8 3/8 3/8 3/8
Number of rows 4 4 4 4
Fins per inch 14 14 14 14
Drain connection - Number and size (1) 1 in. NPT coupling
Expansion device type Balance port TXV, removable head
3
Indoor
Blower and
Drive
Selection
Nominal motor output 2 hp, 3 hp, 5 hp
Maximum usable motor output
(US Only)
2.3 hp, 3.45 hp, 5.75 hp
Motor - Drive kit number 2 hp
Kit 1 590-890 rpm (std. and high efciency)
Kit 2 800-1105 rpm (std. and high efciency)
Kit 3 795-1195 rpm (std. and high efciency)
3 hp
Kit 4 730-970 rpm (std. efciency)
Kit 5 940-1200 rpm (std. efciency)
Kit 6 1015-1300 rpm (std. efciency)
Kit 7 730-970 rpm (high efciency)
Kit 8 940-1200 rpm (high efciency)
Kit 9 1015-1300 rpm (high efciency)
5 hp
Kit 10 900-1135 rpm (std. efciency)
Kit 11 1040-1315 rpm (std. efciency)
Kit 12 1125-1425 rpm (std. efciency)
Blower wheel nominal diameter x
width - in.
(1) 15 X 15 (1) 15 X 15 (1) 15 X 15 (1) 15 X 15
Filters Type of lter Disposable
Number and size - in. (4) 20 x 25 x 2
Electrical characteristics 208/230V, 460V or 575V - 60 hertz - 3 phase
NOTE - Net capacity includes evaporator blower motor heat deduction. Gross capacity does not include evaporator blower motor heat deduction.
1
AHRI Certied to AHRI Standard 340/360; 95°F outdoor air temperature and 80°F db/67°F wb entering evaporator air; minimum external duct static pressure.
2
Integrated Energy Efciency Ratio certied and tested according to AHRI Standard 340/360.
3
Using total air volume and system static pressure requirements determine from blower performance tables rpm and motor output required. Maximum usable output of
motors furnished are shown. 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.
NOTE – Units equipped with Multi-Stage Air Volume option are limited to a motor service factor of 1.0.

Table of Contents

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Lennox LGH102H4M Specifications

General IconGeneral
ModelLGH102H4M
Phase1
RefrigerantR-410A
Motor TypeECM
Maximum External Static Pressure0.8 in. w.g.

Summary

WARNING

CAUTION

Safety caution regarding handling sharp sheet metal edges.

SPECIFICATIONS - 092H, 102H

BLOWER DATA

ELECTRICAL DATA

7.5 ΤΟΝ HIGH EFFICIENCY (R-410A) LGH092H4

Electrical data for 7.5 ton high efficiency LGH092H4.

8.5 ΤΟΝ HIGH EFFICIENCY (R-410A) LGH102H4

Electrical data for 8.5 ton high efficiency LGH102H4.

I-UNIT COMPONENTS

B-Cooling Components

3-High Pressure Switches S4, S7

Description of high pressure switches S4 and S7.

Blower Operation

Three Phase Scroll Compressor Voltage Phasing

Voltage phasing requirements for three-phase scroll compressors.

D-GAS HEAT COMPONENTS

Burner Ignition Control A3

Details on the burner ignition control A3.

II-PLACEMENT AND INSTALLATION

III-CHARGING

Procedures for charging the refrigerant system.

A-Refrigerant Charge and Check - All-Aluminum Coil 092H, 102H, 120H, 150S Units

Refrigerant charge verification for all-aluminum coil units.

IV-START-UP - OPERATION

A-Preliminary and Seasonal Checks

Preliminary and seasonal checks before operation.

B-Cooling Start-up See figure 34, 35 or 36 for Circuits

Cooling start-up procedures for different circuits.

C-Heating Start-up

FOR YOUR SAFETY READ BEFORE LIGHTING

Safety instructions before lighting the unit.

Placing Furnace In Operation

Procedures for placing the furnace in operation.

V-SYSTEMS SERVICE CHECKS

A-Heating System Service Checks

Service checks for the heating system.

3-Testing Gas Supply Pressure

Steps for testing gas supply pressure.

4-Check and Adjust Manifold Pressure

Procedure to check and adjust manifold pressure.

VI-MAINTENANCE

ECONOMIZER

H-Economizer (all units) (Field or Factory Installed)

Information on the optional economizer.

SEQUENCE OF OPERATION ECONOMIZER

Sequence of operation for the economizer.

VIII-Belt Drive Supply Air Inverter

ADJUST CFM

IX-Direct Drive Supply Air Inverter

X-Staged Supply Air Operation

XI-Wiring Diagrams and Sequence of Operation

LGH092/150S & H - CONSTANT SUPPLY AIR, BELT DRIVE BLOWER

GAS HEAT FOR LGH092/150 UNITS

WIRING DIAGRAM

Wiring diagram for gas heat components.

GAS HEAT SEQUENCE OF OPERATION LGH092/150

SUPPLY AIR INVERTER - NO BYPASS SEQUENCE OF OPERATION

SUPPLY AIR INVERTER - WITH OPTIONAL FACTORY-INSTALLED BYPASS SEQUENCE OF OPERATION

DIRECT DRIVE BLOWER SEQUENCE OF OPERATION / TROUBLESHOOTING

Failure Handling/Troubleshooting:

Steps for failure handling and troubleshooting.

TABLE 30

DIRECT DRIVE BLOWER MOTOR TROUBLESHOOTING

Troubleshooting guide for direct drive blower motors.

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