IBC HC 20-125

INSTALLATION AND OPERATING INSTRUCTIONS
www.ibcboiler.com
HC Series Boilers
HC 13-50, HC 23-84, HC 29-106, HC 33-124, HC 20-125, HC 33-160
(Natural Gas or Propane)
WARNING: If the information in this manual is not followed exactly, a re or
explosion may result causing property damage, personal injury, or loss of life.
Do not store or use gasoline or other ammable vapours and liquids or other
combustible materials in the vicinity of this or any other appliance.
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.
• Immediately call your gas supplier from a nearby phone. Follow the gas
supplier’s instructions.
• If you cannot reach your gas supplier, call the re department.
Installation and service must be performed by a qualied installer, service
agency or the gas supplier.
This Manual is also available in French - contact IBC or visit our web site www.ibcboiler.com

IBC HC 20-125 Specifications

General

Brand	IBC
Model	HC 20-125
Category	Boiler
Language	English

Summary

Installation and Operating Instructions

Safety Warnings and Gas Leak Procedures

Important safety warnings for fire, explosion, and gas leaks, with immediate actions.

Safety Considerations and Precautions

Hot Water Safety and Installation Guidelines

General Installation Precautions

Exhaust Venting and Air Intake

Venting Applications and Material

Approved Exhaust Vent Materials

Rooftop Vent Termination

Direct Vent - Two Pipe Rooftop

Guidelines for terminating two-pipe direct vent systems on the rooftop.

Direct Vent Concentric Rooftop Termination

Guidelines for installing concentric rooftop vent termination kits.

Sidewall Vent Termination

Direct Vent - Two Pipe Sidewall

Instructions for venting two-pipe direct vent systems through the sidewall.

Sidewall Venting Configurations

Direct Vent Concentric Side Wall Termination

Information on approved concentric side wall termination kits.

Combustion Air Intake Piping

Condensate Removal

Condensate Trap Assembly Installation

Step-by-step instructions for installing the condensate trap.

Space Heating Water Piping

General Piping Considerations

General guidelines for installing space heating water piping.

Relief Piping Requirements

Gas Piping

Gas Supply Pressure Requirements

Required inlet gas pressure for natural gas and propane.

Gas Piping Material and Installation

Guidelines for gas piping material, size, and installation practices.

Electrical Connections

120 VAC Line Voltage Hook-up

Instructions for connecting the boiler to a 120VAC power supply.

Electrical Controls and Wiring

Thermostat and Sensor Wiring

Connecting thermostats, outdoor sensors, and DHW sensors to the controller.

Wiring Diagrams

Boiler Control Panel and Interface

Space Heating Operation

Boiler Sequence of Operation

Startup and Commissioning

Lighting and Shutting Down the Boiler

Step-by-step instructions for lighting and shutting down the boiler.

Pre-Startup Checks and Commissioning

Gas Valve Adjustment and CO2 Readings

Fuel Conversion Procedures

Boiler Maintenance

General Care and Inspection

General care, inspection, and safety precautions for boiler maintenance.

Condensate Trap Maintenance

Troubleshooting Guide

Preliminary Troubleshooting Checks

Initial checks to perform when troubleshooting boiler issues.

Electronic Components and Sensors

Temperature Sensor Resistance Values

Sensor and Component Testing

Water Pressure Sensor Testing and Replacement

Procedures for testing and replacing the water pressure sensor.

Boiler Warnings and Fault Codes

Warning Codes and Possible Solutions

List of warning codes and their potential solutions.

Fault Codes and Troubleshooting

Sensor Faults and Flame Signal Issues

Troubleshooting sensor faults and poor flame signal issues.

Other Boiler Faults

Burner Ignition and Noise Issues

Heating and Hot Water Faults

No Space Heating Troubleshooting

Diagnostic steps for issues related to no space heating.