Lennox GCS16-1853-330

SERVICE
GCS16
UNIT
INFORMATION
6-25 TON UNITS
Page 1
1994 Lennox Industries Inc.
Corp. 9322-L3 Litho U.S.A.
GCS16 SERIES
GCS16 series units in the 6 ton and larger cooling size are
packaged combination two-stage gas heat / two-stage dx
cool units designed for commercial applications. Gas heat
sections are designed with Lennox' aluminized steel tube
heat exchangers ranging in size from 135,000 to 470,000
Btuh input. Units are designed for rooftop or side of building
installation with either bottom or horizontal discharge and
return air.
For commercial applications, the GCS16 is designed to ac
cept any of several different thermostat control systems with
minimum field wiring. Control options such as economizer,
warm up kit, Honeywell W973 control, Honeywell W7400
control or other field specified controls connect to the unit
with jack-plugs. When plugged in" the controls become an
integral part of the unit wiring. Units are also equipped with a
low voltage terminal strip to facilitate thermostat field wiring.
All specifications in this manual are subject to change.
GCS16-1853 SHOWN
TABLE OF CONTENTS
Introduction Page 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications Pages 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Data Page 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Data Pages 11-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Resistance Data Pages 17-18. . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Arrangement Pages 18-22. . . . . . . . . . . . . . . . . . . . . . . . . . . .
I- APPLICATION Page 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
II- UNIT COMPONENTS Pages 22-41. . . . . . . . . . . . . . . . . . . . . . . . .
Control Box Components Pages 22-25. . . . . . . . . . . . . . . . . . . . . .
Heating Components Pages 26-34. . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling Components Pages 34-40. . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Compartment Components Pages 40-41. . . . . . . . . . . . . .
III- ELECTRICAL CONNECTIONS Page 41. . . . . . . . . . . . . . . . . . . .
IV- PLACEMENT AND INSTALLATION Page 41. . . . . . . . . . . . . . .
V- START UP - OPERATION Pages 41-42. . . . . . . . . . . . . . . . . . . . .
Preliminary Checks Page 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling / Heating Start Up Pages 41-42. . . . . . . . . . . . . . . . . . . . . .
Safety or Emergency Shut Down Page 42. . . . . . . . . . . . . . . . .
VI- COOLING SYSTEM CHECKS Page 42. . . . . . . . . . . . . . . . . . . . .
Gauge Manifold Attachment Page 42. . . . . . . . . . . . . . . . . . . . . . .
Charging Page 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VII- HEATIING SYSTEM SERVICE CHECKS Pages 42-46. . . . . . . .
A.G.A./C.G.A. Applications and Requirements Page 42-43. . . . .
Gas Piping Page 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing Gas Piping Page 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Testing Supply Pressure Page 43. . . . . . . . . . . . . . . . . . . . . . . . . .
Check and Adjust Manifold Pressure Page 43-44. . . . . . . . . . . . .
Proper Gas Flow Page 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
High Altitude Derate Pages 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inshot Burner Pages 44-45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Heat Exchanger Page 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition Control Page 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrode Gap and Flame Sensing Pages 45-46. . . . . . . . . . . . .
Combustion Air Blower Page 46. . . . . . . . . . . . . . . . . . . . . . . . . . .
VIII- INDOOR BLOWER OPERATION / ADJUSTMENT
Pages 46-47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Operation Page 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Determining Unit CFM Page 46. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Belt Adjustment Pages 46-47. . . . . . . . . . . . . . . . . . . . . . .
IX- MAINTENANCE Page 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filters Page 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication Page 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supply Air Blower Wheel Page 47. . . . . . . . . . . . . . . . . . . . . . . . . .
Evaporator and Condenser Coil Page 47. . . . . . . . . . . . . . . . . . . .
Electrical Page 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
X- ACCESSORIES Pages 48-63. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RMF16 Roof Mounting Frame Page 48. . . . . . . . . . . . . . . . . . . . .
OAD16 Outdoor Air Damper Page 48. . . . . . . . . . . . . . . . . . . . . . .
Economizers Pages 48-54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transitions and Supply / Return Diffusers Page 54. . . . . . . . . . . .
Firestats Page 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cycle Control Kit Page 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low Ambient Kit Page 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Status Panels Pages 56-57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Commercial Controls Hardware Pages 58-59. . . . . . . . . . . . . . . .
Optional Commecial Controls Systems Pages 59-63. . . . . . . . . .
Clocks / Timers Page 63. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
XI- WIRING DIAGRAMS / OPERATION SEQUENCE
Pages 64-79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Operation Sequence Pages 64-75. . . . . . . . . . . . . . . . . . . . .
REMD16M Economizer Operation Sequence Pages 76-77. . . .
Warm Up Kit Operation Sequence Pages 78-79. . . . . . . . . . . . . .
Библиотека СОК 

Lennox GCS16-1853-330 Specifications

General

Model	GCS16-1853-330
Heating Capacity	185, 000 BTU
Fuel Type	Natural Gas
BTU Input	185, 000 BTU
Gas Type	Natural Gas
Voltage	115V

Summary

Unit Components

Parts Arrangement Diagrams

Visual diagrams showing the location of major components within the unit for various models.

Control Box Components

Details the layout and function of components within the electrical control boxes for various models.

Electrical Connections

Power Supply Requirements

Outlines voltage, ampacity, and wiring requirements for unit power connection.

Start Up and Operation Procedures

Preliminary and Seasonal Checks

Covers essential pre-operation checks for safety, wiring, and refrigerant lines.

Cooling Startup Procedure

Details steps for initiating cooling operation, including thermostat settings and refrigerant checks.

Heating Startup Procedure

Outlines steps for initiating heating operation, including thermostat settings and burner checks.

Cooling System Service Checks

Refrigerant Charging and Approach Method

Details refrigerant charging procedures and using the approach method for accuracy.

Heating System Service Checks

Gas Piping Installation and Testing

Covers requirements for gas supply piping and leak testing procedures.

Manifold Pressure Check and Adjustment

Explains how to check and adjust gas manifold pressure for proper burner operation.

Indoor Blower Operation and Adjustment

Determining Unit Airflow (CFM)

Explains methods for measuring and calculating unit airflow.

Blower Belt Adjustment

Details procedures for adjusting blower belt tension and alignment for optimal performance.

Unit Maintenance Procedures

Filters Inspection and Replacement

Guides on checking, cleaning, or replacing air filters for optimal airflow.

Evaporator and Condenser Coil Cleaning

Provides instructions for cleaning heat exchange coils to maintain efficiency.

Optional Accessories

Economizer Options and Operation

Covers installation and basic operation of economizer options for ventilation.

Commercial Controls Hardware and Wiring

Lists and describes jackplugs for connecting commercial control systems.

Wiring Diagrams and Operation Sequences

C1 Diagram with B1 Diagram

Illustrates electrical connections for basic thermostat operation without economizer.

C1 Diagram with D5 Diagram

Shows electrical connections for thermostat with modulating economizer.

H-WARM-UP KIT Operation Sequence

Details the operation sequence for the warm-up kit accessory.