Part number 550-100-180/0917
93
Before troubleshooting:
1. See Figure 87 for tools and kits recom-
mended for troubleshooting SlimFit
boilers.
2. Check for 120 VAC (minimum 102 VAC
to maximum 132 VAC) to boiler.
3. Check the Control’s last three lockout
histories.
a. See Figure 68, page 74 for access
information.
b. Scroll down to DIAGNOSTICS and
press the enter key.
c. Scroll down to PAST ERRORS and
press the enter key.
d. Record the fi rst four data records and
then highlight the history record you
want to view.
e. Follow information at the bott om of
the screen to navigate through your
lockout histories.
Before servicing and making connections . . .
!,7!93452.0/7%2/&&4/4(%
"/),%24/02%6%.4%,%#42)#!,
352'%37()#(#!.$!-!'%"/),%2
#/-0/.%.43
Before calling, always complete the “SlimFit Gas
Data Collection Sheet” ( page 118 ).
Record the boiler size and CP number (located on
boiler top jacket panel, next to the air inlet connec-
tion).
%,%#42)#!, 3(/#+ (!:!2$
— The
boiler ON/OFF switch does not turn off all power
to the boiler.
452./&&!,,0/7%24/4(%
"/),%27(%.3%26)#).'
. Internal wiring is
still powered when the switch is off .
Label all wires prior to disconnection when servic-
ing controls. Wiring errors can cause improper and
dangerous operation. Always disconnect power to
boiler before servicing. Failure to comply could
result in severe personal injury, death or substantial
property damage.
Never jumper (bypass) any device except for mo-
mentary testing. Severe personal injury, death or
substantial property damage can result.
Troubleshooting
&IGURE
Tools and kits for troubleshooting
Tools needed
Purpose
#2 Phillips Screwdriver
Remove 4 screws to remove the top front
cover.
1/16" fl at blade
screwdriver
Used for wiring on terminal blocks.
3/16" Allen Wrench
(Hex Key)
To remove gas valve pressure tap plugs.
13 mm Nut driver/
ratchet
To remove the heat exchanger cleanout
plate, mixing tube or blower.
3 mm Allen wrench
(Hex Key)
To adjust gas valve throttle.
4 mm Allen wrench
(Hex Key)
To add orifi ce to change from natural to
propane.
Tools needed
Purpose
13 mm wrench
To access combustion system and heat
exchanger assembly, blower or mixing tube.
Multimeter
To take measurement readings on sensors
and electrical components.
Manometer
(Inclined or digital)
To measure the gas pressure coming to the
boiler.
Combustion analyzer
(Digital preferred)
For combustion testing.
Contact thermometer
For checking surface temperatures of heat
exchanger and pipes.
T40 Torx driver
For gas valve off set adjustment.
8 mm wrench
For gas piping to venturi.
SlimFit
®
Series 2
COMMERCIAL
CONDENSING
GAS
-
FIRED
WATER
BOILER
—
Boiler Manual
