Service Manual

2
Table of Contents
Service Procedure
Serial Number Breakdown………………………………………
4
- - -
Introduction………………………………………………………..
5
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How to Use this Manual………………………………………….
5
- - -
Tools Required for Service………………………………………..
6
- - -
Venting Tables and Approved Venting…………………………
7
- - -
Specifications……………………………………………………..
9
- - -
ICON System Features………………………………………….
10
- - -
Sequence of Operation…………………………………………..
11
- - -
Building Management System (BMS)………………………….
13
- - -
Troubleshooting………………………………………………….
15
- - -
Thermostat Circuit Testing and Replacement…………………
26
I
Combustion System Testing and Replacement……………….
31
II
Burner Tube Inspection and Replacement……………………
35
III
Gas Valve Replacement………………………………………...
37
IV
Blower Testing and Replacement……………………………...
38
V
Exhaust Pressure Switch Testing and Replacement………...
40
VI
Flame Sensor Testing and Replacement……………………..
44
VII
Spark Rod Gap Adjustment and Replacement……………….
45
VIII
Ignition Module/Control Board Replacement………………….
47
IX
Transformer Replacement………………………………………
48
X
Vent Safety Switch Testing and Replacement………………..
49
XI
Flue Baffle Inspection and Replacement………………………
51
XII
Powered Anode Replacement………………………………….
52
XIII
Page
Section 1: Serial Numbers “XC-” (March 2021) and Later
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