EasyManua.ls Logo

Lennox SGH060 User Manual

Lennox SGH060
60 pages
To Next Page IconTo Next Page
To Next Page IconTo Next Page
Page #1 background imageLoading...
Page #1 background image
©2019
SGH120 SHOWN
IMPORTANT
Supply air VFD motor rotation is controlled indepen
dently from scroll compressor rotation. See Cooling
Start-Up section for correct compressor rotation.
Compressor damage due to improper rotation is the
responsibility of the installer.
Table of Contents
Dimensions Page 2.................................
Parts Arrangements Page 5.........................
Shipping and Packing List Page 8....................
General Page 8....................................
Safety Page 8.....................................
Unit Support Page 9................................
Duct Connection Page 10............................
Rigging Unit For Lifting Page 10.......................
Condensate Drains Page 10..........................
Gas Piping Page 11.................................
Pressure Test Gas Piping Page 11.....................
RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
INSTALLATION
INSTRUCTIONS
SGH/SCH036 (3 TON)
SGH/SCH060 (5 TON)
SGH/SCH120 (10 TON)
SGH/SCH240 (20 TON)
ROOFTOP UNITS
507964-01
9/2019
Supersedes 507364-02
High Altitude Derate Page 12.........................
Optional Outdoor Air Hood Page 13....................
Electrical Connections Page 15.......................
Blower Operation and Adjustments Page 17............
Cooling Start-Up Page 29............................
Cooling Operation and Adjustments Page 31............
Gas Heat Start-Up Page 41...........................
Electric Heat Start-Up Page 43........................
Heating Operation and Adjustments Page 43............
MSAV
t Unit Start-Up Page 45........................
MSAV
t Operation Page 46..........................
Direct Drive Start-Up Page 47.........................
Hot Gas Reheat Startup Page 49......................
Economizer Start-Up Page 53.........................
Service Page 55....................................
Factory Control Parameter Settings Page 58............
Start-Up Report Page 60.............................
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person
al injury or loss of life. Installation and service must
be performed by a licensed professional HVAC in
staller or equivalent, service agency, or the gas sup
plier
WHAT TO DO IF YOU SMELL GAS:
If the information in this manual is not
followed exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.
WARNING
Do not store or use gasoline or
other flammable vapors and liq
uids in the vicinity of this or any
other appliance.
Installation and service must be
performed by a qualified installer,
service agency or the gas supplier.
S Do not try to light any appliance.
S Extinguish any open flame.
S Do not touch any electrical switch; do not
use any phone in your building.
S Immediately call your gas supplier from a
neighbor's phone. Follow the gas suppli
er's instructions.
S If you cannot reach your gas supplier, call
the fire department.
S Leave the building immediately.
Question and Answer IconNeed help?

Do you have a question about the Lennox SGH060 and is the answer not in the manual?

Lennox SGH060 Specifications

General IconGeneral
Refrigerant TypeR-410A
Phase1
Cooling Capacity60000 BTU/h
SEER16
SEER Rating16
Voltage208/230V

Summary

Safety Precautions

Rigging and Duct Connections

Gas Piping Installation

Connect Gas Piping - SG Units

Instructs on connecting gas supply piping to SG units, including sizing and local codes.

High Altitude Derate

Electrical Connections

POWER SUPPLY

Details how to connect the main power supply to the unit, including voltage considerations.

CONTROL WIRING

Explains wiring for thermostats, zone sensors, and other control devices.

Blower Operation and Adjustments

Determining Unit CFM and Blower Adjustments

Cooling Start-Up Procedure

A-Preliminary Checks

Lists essential checks before starting the unit's cooling operation.

B-Start-Up

Details the step-by-step process for starting the cooling system based on unit model.

AIMPORTANT (Three Phase Scroll Compressor Voltage Phasing)

Highlights the importance of correct voltage phasing for three-phase scroll compressors.

Cooling Operation and Adjustments

A-Refrigerant Charge and Check

Guides on verifying and adjusting the system's refrigerant charge using operational pressures.

Compressor Controls

Gas Heat Start-Up

Placing Unit In Operation

Gas Valve Operation

Explains the proper operation of the gas valve for starting and stopping the heating function.

Electric Heat Start-Up

Heating Operation and Adjustments (SG Units)

A-Heating Sequence of Operation

Details the steps involved in the heating cycle, from inducer to flame proving.

C-Two-Stage Gas Manifold Pressure Adjustment

Guides on setting gas manifold pressures for two-stage gas valves.

Proper Gas Flow Verification

MSAV™ Unit Start-Up

C-Enter Design Specifications Into Controller

Details the menu path to input design CFM specifications into the Unit Controller.

MSAV™ Operation

Direct Drive Blower Start-Up

Hot Gas Reheat Operation

Check-Out Procedures

Optional Economizer Settings

B-Configure Economizer

Details the menu path and options for configuring the economizer based on unit requirements.

Economizer Operation Modes

Unit Service and Maintenance

Combustion Air Inducer Maintenance

Component Cleaning and Settings

Factory Unit Controller Settings

Guides on adjusting unit parameter settings using the Unit Controller interface.

START-UP REPORT

Inspections and Checks

Section for documenting initial inspections, including damage checks and electrical connections.

Cooling Checks

Fields for recording compressor and fan performance data during cooling operation.

Related product manuals