Lennox G26Q4-75 Manuals

Manuals and User Guides for Lennox G26Q4-75. We have 1 Lennox G26Q4-75 manual available for free PDF download: Unit Information

Lennox G26Q4-75 Unit Information

Lennox G26Q4-75 Unit Information (53 pages)

G26 Series

Brand: Lennox | Category: Furnace | Size: 2 MB

Table of Contents

Combustion Process
1
Service Literature
1
Specifications
2
Blower Performance Data
3
G26-3 Trought-6 Components
7
Components Diagram
7
Control Box Components
9
Unit Components Overview
9
Make-Up Box Installation
9
Control Transformer
10
Circuit Breaker
10
Door Interlock Switch
10
Burners
10
Surelight Control Board
11
Surelight Control Terminal Designations
11
Diagnostic Codes
11
Surelight Board Terminal Designations
12
Electrostatic Discharge - Precautions and Procedures
12
Fan-Off Time Adjustment
12
Blower Motors and Capacitors
12
Combustion Air Blower
13
Primar Limit Control
13
Rollout Switch
13
Blower Control
13
Ignition Control
14
Pilot, Spark Electrode, Flame Sensor
15
Diagnostic LED
15
Ignition Control Operation
15
Gas Valve
16
Differential Pressure Switch (Combustion Air Prove Switch)
17
Placement and Installation
19
PVC Joint Cementing Procedure
19
B-Venting Considerations
19
Intake Piping
20
Exhaust Piping
20
Removal of Unit from Common Venting System
20
Intake and Exhaust Piping Terminations
20
Condensate Piping
25
Flue Trap Assembly
25
Condensate Assembly
25
Condensate Plumbing
25
Start-Up
26
Preliminary and Seasonal Checks
26
Condensate Removal Process
26
Detail of Cold Header Condensate Trap
26
Heating Start-Up
27
Heating System Service Checks
28
Extended Period Shutdown
28
Exhaust CO2 and CO Content
28
Gas Piping
28
Testing Gas Supply Pressure
29
Check Manifold Pressure
29
Proper Gas Flow
30
High Altitude Derate
30
Flame Signal Measurement
30
Typical Operating Characteristics
31
Blower Operation and Adjustment
31
External Static Pressure
31
Blower Speed Taps Leadless Motors
31
Maintenance
32
Blower Speed Taps Leaded Motors
32
To Remove Blower
32
Blower Speed Tap Selection
32
Cleaning Heat Exchanger and Burners
33
Cleaning the Burner Assembly
34
Burner Access/Removal
34
Supply Air Blower Care
35
Electrical Parts Care
35
Intake and Exhaust Lines Check
35
Winterizing and Condensate Trap Care
35
Wiring Diagram, Sequence of Operation and Troubleshooting
36
Field Wiring, Thermostat Connections
36
Heating Sequence of Operation - Surelight Control
38
Cooling Sequence of Operation
40
Continuous Low Speed Fan Sequence of Operation
41
Troubleshooting Guide
42
Troubleshooting Flowchart
49
Ignition Control Troubleshooting
50
Spark Is Present but Pilot will Not Light
50

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