IBC HC 15-95 User Manual

2-9
STARTUP AND COMMISSIONING
HC SERIES BOILERS HC 13-50, HC 23-84, HC 29-106, HC 33-124, HC 20-125, HC 33-160
SEQUENCE OF OPERATION
The boiler will operate in a similar way for both a space heating and a domestic
hot water call for heat. When the boiler is powered up the controller enters a self
diagnostic mode and displays 2 in the Service Display.
The Sequence of Operation is as follows:
1. The boiler receives a call for heat from closing terminals X4.6 and X4.7 (24
volts). The boiler can also receive a call from Domestic Hot Water heating
from the closing terminals, X4.9 and X4.10 (24 volts) (12KΩ sensor or
aquastat)
2. The boiler does a safety check and energizes the fan for a pre-purge
(Service Display = 3)
3. Once the 5 second pre-purge is compete, the boiler enters a 5 second trial
for ignition (Service Display = 4). If the boiler fails to ignite, the boiler will
compete a 5 second inter-purge then another 5 second trial for ignition. This
is repeated 4 times before a hard lock out occurs. The Reset button
must be pressed to reset the controller and allow for another attempt.
4. Once the burner is lit and ame has been proven the boiler operates as it is
programmed (Service Display = 5 for Space Heating or 6 for Domestic Hot
Water)
5. If the boiler reaches its target temperature and there is still a call for heat or
hot water. (Service Display = 1)
6. After the call for heat is satised, the boiler pump will operate for an
adjustable amount of time (Service Display = 0)
7. If the burner is on to maintain the heat exchanger temperature for DHW
Comfort mode or for Freeze Protection mode (Service Display = 7)
8. If the burner is on for Frost Protection (Service Display = 9)
MAIN
DISPLAY
SERVICE
DISPLAY
DESCRIPTION
(blank) - The boiler is OFF. Press the On/Off button to turn
on the boiler
(blank) (blank) No Call for Heat - Standby
XXX 0 Boiler pump running – pump post purge
XXX 1 Boiler water temperature reached target – boiler pump is
energized, call for heat still present
XXX 2 Self-test – When power is applied to the boiler the
controller enters a self diagnostic mode for 5 seconds
XXX 3 Fan Pre-purge , Inter-purge and Post-purge
XXX 4 Trial for Ignition and Flame Proving
XXX 5 Heating – Space Heating
XXX 6 Heating – DHW
XXX 7 Burner on for Comfort mode or Freeze Protection mode
Table 8: Operating Display and Service Display Codes.
2.7
NOTE
The boiler is equipped with
a Frost Protection feature.
This feature will operate
the boiler pump and the
burner to help protect the
boiler from freezing. If the
boiler is in a hard lock-out
condition the burner will not
operate, however the boiler
pump will operate. IBC is
not responsible for damages
to the boiler, and/or related
components, nor property
damages that may result from
freezing conditions.

IBC HC 15-95 Specifications

General

Brand	IBC
Model	HC 15-95
Category	Boiler
Language	English