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Gas-Fired Boiler Table of Contents
5.3 Removing the Exchanger ......................... 26
5.4 After All Repairs or Maintenance.............. 26
5.5 Sequence of Operation.............................. 27
5.5.1 Standard Modulating .......................... 27
5.5.2 IRI Modulating .................................... 28
5.6 Troubleshooting........................................ 29
6.0 PARTS/TECHNICAL SUPPORT ..............31
6.1 Schematic Diagrams.................................. 31
Standard Unit - Local Control - Logic Diagram32
Standard Unit - Remote Control - Logic
Diagram.................................................. 33
Standard Unit - Local & Remote Control -
Logic Diagram........................................ 34
Standard Unit - Local & Remote Control w
Options - Logic Diagram ........................ 35
IRI Unit - Local Control - Logic Diagram .......36
IRI Unit - Remote Control - Logic Diagram...37
IRI Unit - Local & Remote Control - Logic
Diagram ..................................................38
IRI Unit - Local & Remote Control w Options -
Logic Diagram ........................................39
Standard Unit – Panel Layout.......................40
IRI Unit – Panel Layout.................................41
6.2 Boiler Parts List .........................................42
6.2.1 Main Assembly....................................42
6.2.2 Control Panel ......................................43
6.2.3 Gas Trains...........................................45
6.2.4 Cabinet................................................49
7.0 LIMITED WARRANTY.............................50
Reorder No. 6020-V2WHPK
Improper use may
result in fire or injury.
Read instructions/safety
manual before installing,
operating or servicing boiler.
c
!
WARNING
1998 HCS, Inc. 800-748-0241
WARNING!
It is essential to read, understand, and follow the
recommendations of this manual before installing,
operating, or servicing this equipment. Failure to do
so could result in fire or explosion and serious in-
jury, death, and/or property damage.
The same features which permit this boiler to
achieve high-efficiency performance make it unlike
most other boilers of this general size, so it is im-
portant to understand how this boiler operates.
Do not store or use gasoline or other flammable
vapors or liquids in the vicinity of this or any other
appliance.
WARNING!
Installation and service must be performed by a
qualified installer, service agency, or gas supplier.
What to do if you smell gas:
• Do not try to light any appliance.
• Do not touch any electrical switch.
• Do not use any phone in your building. Imme-
diately call your gas supplier from a neighbor's
phone. Follow the gas supplier's instructions.
• If you cannot reach your gas supplier call the
fire department.