NOTE
These instructions are to be closely followed, and referenced to the
details in the boiler’s current certified Installation and Operating
Instruction Manual.
WARNING
For your safety, turn off electrical power supply at service panel and allow unit to cool before proceeding. Failure to do
so can cause severe personal injury or death. The ability to properly perform service on this equipment requires
certain expertise, mechanical skills, tools, and equipment. If you do not possess these, do not attempt to perform any
service on this equipment. A failure to follow this warning could result in possible damage to this equipment, serious
personal injury, or death.
NOTE
Installing and servicing boiler
equipment, parts and
accessories, can be
hazardous due to gas and
electrical components.
Only trained personnel
should install or service
heating equipment.
When working on boiler
equipment, observe
precautions in the literature,
on tags, and on labels
attached to the unit.
www.ibcboiler.com
October 29, 2019
Page 1 of 2
Cleaning the DC and HC Series Heat Exchangers
Like any condensing appliance, the IBC DC- and HC-series boiler / water heaters must be regularly inspected and
maintained.
Part of performing an annual maintenance is being prepared to clean a heat exchanger when it’s required; buildup
from the products of combustion are typically concentrated on the bottom half of the heat exchanger where cooler
water has caused flue gases to condense.
How to Access the Heat Exchanger for Cleaning
1. Remove any call for heat, and power off the boiler / water heater.
2. Remove cabinet front door panel and allow the boiler to cool. There is no need to drain the boiler’s water unless
the boiler will be subject to freezing conditions while the boiler is off.
3. Lay a plastic barrier over the bottom of the boiler cabinet to protect the electronics beneath from water in the
condensate assembly and from spillage during the cleaning process.
4. Turn off the gas supply.
5. Disconnect the flue pipe from the condensate tray by rotating the nut counter-clockwise about ¼ turn. Slide the
flue pipe up and dis-engage the bottom of the flue pipe from the condensate tray and slide down to remove.
6. Unplug the electrical connectors at the gas valve and both connectors to the fan.
INSTRUCTIONAL
NOTE
Heat Exchanger Cleaning
DC / HC Series (all models)
Table 1: Heat Exchanger Service Kits by Boiler / Water heater model
HEAT EXCHANGER
SERVICE KIT PART #
BOILER MODEL
DC Series – DC 23-84
HC Series – HC 13-50, HC 23-84
P-713
DC Series – DC 29-106
HC Series – HC 29-106
P-714
DC Series – DC 15-96, DC 33-124, DC 20-125, DC 33-160
HC Series – HC 15-96, HC 33-124, HC 20-125, HC 33-160
P-715
Figure 1: Heat Exchanger Gasket from P-715
7. Loosen the lower gas valve connection nut. NOTE:
There is an O-ring in the lower gas connection. Remove
the two 8mm nuts on the outlet of the fan; remove the
entire fan and gas valve assembly. Place this in a safe
location to be used for re-assembly. Cover the gas
piping connections to prevent debris from entering the
gas piping.
8. CAUTION: When removing the heat exchanger front
cover in step 9, be careful not to damage the burner
and refractory material located on the opposite side of
the heat exchanger cover. Use caution when handling
refractory materials. See CAUTION sidebar over.
