Troubleshooting - Weil-McLain SlimFit 2 Series Manual

SlimFit ® Series 2

Troubleshooting

VERIFY PROPER OPERATION AFTER SERVICING. VERIFY PROPER OPERATION AFTER SERVICING.
Before servicing and making connections .
. .
ALWAYS TURN POWER OFF TO THE
BOILER TO PREVENT ELECTRICAL
SURGES, WHICH CAN DAMAGE BOILER
COMPONENTS
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
connection).
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.
Figure 87
Tools and kits for troubleshooting
Tools needed Purpose
#2 Phillips Remove 4 screws to remove the top
Screwdriver front cover.
1/16" flat blade
Used for wiring on terminal blocks.
screwdriver
3/16" Allen Wrench To remove gas valve pressure tap
(Hex Key) plugs.
13 mm Nut driver/ To remove the heat exchanger
ratchet cleanout plate, mixing tube or blower.
3 mm Allen wrench
To adjust gas valve throttle.
(Hex Key)
4 mm Allen wrench To add orifice to change from natural
(Hex Key) to propane.
Part number 550-100-561/0224
commercial condensing gas
Before troubleshooting:
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.
- — Boiler Manual
fired water boiler
ELECTRICAL SHOCK HAZARD
ON/OFF switch does not turn off all power to
the boiler.
BOILER WHEN SERVICING
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
momentary testing. Severe personal injury, death
or substantial property damage can result.
Tools needed
13 mm wrench
Multimeter
Manometer
(Inclined or digital)
Combustion
analyzer (Digital
preferred)
Contact
thermometer
T40 Torx driver
8 mm wrench
— The boiler
TURN OFF ALL POWER TO THE
. Internal wiring is
d. Record the first four data re-
cords and then highlight the
history record you want to view.
e. Follow information at the bot-
tom of the screen to navigate
through your lockout histories.
Purpose
To access combustion system and
heat exchanger assembly, blower or
mixing tube.
To take measurement readings on
sensors and electrical components.
To measure the gas pressure coming
to the boiler.
For combustion testing.
For checking surface temperatures of
heat exchanger and pipes.
For gas valve offset adjustment.
For gas piping to venturi.
93