Weil-McLain SlimFit Manual page 92

SlimFit
™
commercial condensing gas
Startup procedure
Adjust and test boiler controls
1. Follow instructions in this manual to set and verify operation of
the boiler controls.
2. Test the gas pressure switches. Then restore the settings to the
following:
a. High gas pressure switch — 14" w.c.
b. Low gas pressure switch — 2" w.c.
c. Make sure gas pressure complies with instructions on page 49.
Gas valve leakage testing
DO NOT connect a manometer to the manual gas valve or
the automatic gas valve. The high vacuum from the blower
could pull fluid into the gas line, possibly damaging the
gas valves.
1. Refer to the gas valve manufacturer's instructions for the procedure
to test the valve. Use the procedure below to turn the gas valve's two
solenoid valves on one at a time.
Operating gas valves solenoids for leak testing
off power to the boiler.
1. Turn
2. Obtain the gas valve test harness, located in the envelope assem-
bly.
3. Discon
nect the gas valve electrical
harness
4. Plug in the gas valve test harness
between the gas valve and the gas
valve electrical harness.
5. Ensur e both test harness rocker switches are in the ON position.
6. Turn on power to the boiler.
7. Give the boiler a call for heat.
8. Verify that the boiler operates through a normal ignition sequence.
9. To operate each of the gas valve's solenoids individually:
a. Turn the test harness rocker switches to OFF.
b. Turn on one of the rocker switches.
c. Provide a call for heat.
d. When the gas valve is energized, you should only see one
indicator light on, V1 or V2 (Figure 90).
e. Use a piece of tape to label this rocker switch as V1 or V2,
depending on which light was turned on.
f. Label the other rocker switch with the name of the other
indicator light (V1 or V2).
g. Power the boiler on and off and use the rocker switches to
operate solenoid V1 or V2 independently as called for in the
gas valve manufacturer's leak test instructions.
10. Once testing is complete, turn power off to boiler.
Disconnect the gas valve test harness and place back
in the envelope assembly for future use. Reconnect gas
valve electrical harness.
11. Turn power back on to boiler.
12. Operate the boiler through an ignition cycle to ensure proper
operation.
92
-
fired water boiler
(continued)
Check gas input rate
1. Measure natural gas input:
a. Operate boiler 10 minutes.
b. Turn off other appliances.
c. At natural gas meter, measure time (in seconds) required to
use one cubic foot of gas.
d. Calculate gas input:
number of seconds from step c
e. Btuh calculated should approximate input rating on boiler
rating label.
Verification check list
❏ Verified that the Sola control is programmed correctly?
❏ Verified that boiler and heat distribution units filled with water?
❏ Verified water chemistry per page 87?
❏ Automatic air vents, if used, opened one full turn?
❏ Air purged from system?
❏ Air purged from gas piping? Piping checked for leaks?
❏ Filled condensate trap with water?
❏ Thermostat circuit wiring checked to ensure there are no stray volt-
Gas valve
ages?
test harness
❏ Followed Operating Instructions, Figure 91, page 93
❏ Burner flame and combustion verified per page 90?
❏ Verified control operation for space heating and DHW (if used) per
this manual?
❏ Tested additional field-installed controls? Verified controls cause
automatic reset or manual reset lockout as desired.
❏ Set additional field-installed limit control(s) to system temperature
requirements?
❏ Adjusted balancing valves and controls to provide design temperature
to system?
❏ For multiple zones, adjusted for correct flow in each zone?
❏ Verified thermostat heat anticipator (if available) set properly (see
page 55 for requirements)?
❏ Cycled boiler with thermostat (and with DHW aquastat, if installed)
— Raised to highest setting and verified boiler goes through normal
startup cycle? Lowered to lowest setting and verified boiler goes off?
❏ Measured natural gas input?
❏ Checked incoming gas pressure as specified on page 49.
❏ Observed several operating cycles for proper operation.
❏ Set room thermostat to desired room temperature (and DHW aqua-
stat, if installed, to desired DHW storage temperature)?
❏ Reviewed all instructions shipped with this boiler with owner or
maintenance person?
❏ Filled in Installation certificate on page 128?
❏ Filled out the warranty registration card and send to Weil-McLain?
— Boiler Manual
3600 x 1000
Return instructions to envelope and give to owner or place
inside boiler housing. Instructions must be available for
all service and adjustment of the boiler.
Part number 550-100-116/0713
= Btuh