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
120-297B
Page 1 of 4
When to Install the P-749B Controller Replacement
Kit
The P-749B DC / HC series boiler / water heaters Controller
replacement kit supports all models of the DC / HC series.
The controller must be configured to operate with the
boiler model.
If the old controller shows signs of corrosion or water
damage, care must be taken to identify and correct the
water source before proceeding with this replacement. If
combustion air condensation has caused water damage to
the boiler / water heater, contact your IBC representative
about part number 250-868, Deflector Shield, before
installing a replacement control board.
Tools Needed
Philips screwdriver
Small flathead screwdriver
Needlenose Pliers
Figure 1: P-749B DC / HC Controller
Replacement Kit
1- Replacement Controller, 500-115A
1- Instructions, IBC part 120-297
Table 1: Boiler / Water heater models using this kit
PART
BOILER MODEL
DESCRIPTION
DC Series – All Models
HC Series – All Models
Controller Replacement Kit
P-749B
Better
Boilers
INSTRUCTIONAL
NOTE
P-749B Controller Replacement Kit
DC / HC Series (All Models)
Note: the previous version of this kit, P-749, predated models DC/HC 15-95 and DC/HC
15-96. Only the P-749B (software version 2.10) can replace a board for a 15-95 or 15-96.
