Failure to adhere to these guide-
LINES CAN RESULT IN SEVERE PER
-
SONALINJURYDEATHORSUBSTANTIAL
PROPERTYDAMAGE
ELECTRICAL SHOCK HAZARD
452./&&!,,0/7%24/4(%"/),%27(%.
3%26)#).'
. Internal wiring is still powered when
the switch is off.
DO NOT JUMPER DEVICES
Never jumper (bypass) any device except for mo-
mentary testing.
REINSTALL Jacket door
The boiler jacket door must be securely fastened to
the boiler to prevent boiler from drawing air from
inside the boiler room. This is particularly important
if the boiler is located in the same room as other ap-
pliances. Failure to keep the jacket door securely fas-
tened could result in severe personal injury or death.
BEFORE SERVICING or
MAKING CONNECTIONS —
!,7!93452.0/7%2/&&4/4(%"/),%2
4/02%6%.4%,%#42)#!,352'%37()#(
#!.$!-!'%"/),%2#/-0/.%.43
LABEL WIRES BEFORE
REMOVING
Label all wires prior to disconnection
when servicing controls. Wiring errors
can cause improper and dangerous
operation.
Before calling for troubleshooting assistance, fill in the
“
"OILER3TARTUP$ATA#OLLECTION3HEET
” (page 100).
Record the boiler size and CP number (located on the
left side exterior of the boiler jacket).
Part number 550-100-305/0916
70
AquaBalance
TM
W
ALL
M
OUNT
GAS
-
FIRED
WATER
BOILER
— C
OMBI
Boiler Manual
32
Troubleshooting
Tool
0URPOSE
0HILLIPSSCREWDRIVER
Multiple uses
MMWRENCH
Remove heat exchanger cover plate
LONGHANDLED4ORX
DRIVER
Remove burner screws
44ORXDRIVER
For gas valve Offset Lowfire adjustment
MM!LLENWRENCH
For gas valve Highfire adjustment
-ULTIMETER
Measurements on sensors and electrical components
-ANOMETER
)NCLINEDORDIGITAL
Measures the INLET gas pressure to the boiler
#OMBUSTIONANALYZER
$IGITALPREFERRED
Combustion testing and boiler adjustments
#ONTACTTHERMOMETER
Checking surface temperatures of heat exchanger and
pipes
Check the following:
1. Make sure thermostat is calling for heat and contacts (including
appropriate zone controls) are closed. Make sure all external limit
controls are either installed (and closed) or temporarily jumpered
for testing.
2. Make sure that connectors to control are securely plugged in at
module and originating control.
3. Gas
pressures:
s
Maximum: 13” w.c. with no flow (gas valve lockup pressure).
s
Minimum: 3.5” w.c. minimum values given on page 16 while
operating on high fire.
1. Check for 120VAC (minimum 102 VAC to maximum 132 VAC)
to boiler.
2. Check the control for error codes.
3. See Figure 64, page 50 for navigation instructions and the pages
following for the display key identification.
(OLDRESETBUTTONFORSECONDS
s
TS Flashing (parameter)
s
Push heating – button
s
IN flashing (information)
s
Push heating – button
s
HI flashing (history/fault)
s
Push “Reset” once
s
Push + to scroll error codes, refer to error code list Table 3,
page 73.
4OEXITOUTHOLDRESETBUTTONFORSECONDS
Figure 90
4OOLSANDKITSNEEDEDFORTROUBLESHOOTING