Weil-McLain SVF 1500 Manual page 108

SVF
™
Series 1
Commercial Condensing Gas-Fired Water Boiler — Boiler Manual
Maintenance
Disconnect power before servicing
Electrical shock hazard — Disconnect all electrical
power to the boiler before attempting maintenance
procedures. Failure to complete could result in severe
personal injury, death or substantial property damage.
Perform startup and check/out
Removing and reinstalling components can change
boiler behavior.
After any maintenance procedure, you must verify
operation after servicing. To do so, follow the complete
procedure for boiler and system startup, beginning on
page 85. Failure to comply could result in severe per-
sonal injury, death or substantial property damage.
Label all wires prior to disconnection when serving
controls. Wiring errors can cause improper and danger-
ous operation.
General maintenance
1. Oil motors in system requiring regular oiling.
2. See Oiled bearing pumps for motor oiling procedures.
Oiled-bearing pumps
Check pumps in the system. Oil any pumps requiring oil, following
pump manufacturer's instructions. Over-oiling will damage the pump.
Clean the heat exchanger when required
— water side
1. In order for the efficiency of boilers to increase beyond the con-
densing limit, new materials have been introduced for the heat
exchanger, including stainless steel.
2. Stainless steel has excellent heat transfer characteristics and is
light in weight.
3. These new materials also require cleaning solutions that differ from
those used in conventional cast iron and steel boilers.
One common cleaning method that
with systems containing stainless steel is a solution of
trisodium phosphate, commonly referred to as "TSP. "
Weil-McLain recommends Sentinel X400 for cleaning
boiler. See the Replacement Parts section at the end of
this manual for ordering information.
Clean the heat exchanger when required
— flue side
1. Shut down boiler:
a. Follow "To Turn Off Gas to Appliance" instructions on boiler
and Lighting instructions Figure 83, page 91.
b. Do not drain boiler unless it will be exposed to freezing
temperatures. If using freeze prevention fluid in system, do
not drain.
108
2. Close the external manual gas valve to ensure there is no gas
flow to the unit.
3. Safely bleed the excess gas from between the external manual
shutoff and the gas valve.
4. Allow time for boiler to cool to room temperature if it has been
operating.
5. Follow either "Burner Access Method" or "Hinged Cover Plate
Method" to access the combustion chamber and heat exchanger
tube sheet.
Burner access method (removal)
Follow the procedure on page 96 (steps 1-9) to remove the burner
and access the heat exchanger.
Hinged Cover Plate Method (removal)
1. Remove the top rear and middle panels. Remove the rear two
(2) screws on the support brackets and loosen the front two (2)
screws. Swing the support brackets up and out of the way.
2. Remove the front left and right side panels.
3. Disconnect the reference tube from the air inlet shroud.
4. Loosen the two (2) screws and slide the filter support down.
Then remove air inlet filter.
5. Remove the gas manifold.
a. Remove the four (4) M5 screws securing the gas manifold
b. Remove the four (4) M8 screws securing the gas manifold
c. Set aside manifold.
6. Loosen the twelve (12) bolts securing the cover plate to the
heat exchanger.
7. Remove the locking pin from cover plate.
8. Push down on the top of the blower to hinge the cover plate up.
9. Insert the locking pin to hold the cover plate open. Ensure the
pin is inserted fully and securely.
Water spray the heat exchanger
1. Disconnect the condensate trap at the bottom of the heat ex-
CANNOT
be used
changer so debris will not clog the trap.
a. Loosen the hose clamp on the 1" Fernco fitting and the nuts
b. Place a pan under condensate drain outlet to collect water
2. Use the combustion chamber opening to spray water down into
the heat exchange tubes. Continue spraying until all debris in the
tubes has been flushed into the base.
a. Spray water through the condensate line to clean it thor-
b. Remove the pan and re-install the condensate line.
3. Do NOT spray the burner or cover plate insulation directly if the
burner or cover plate insulation is not removed.
to the blower swirl plate.
to the automatic gas valve.
Ensure locking pin is securely in plate. Failure to
comply could result in severe personal injury, death
or substantial property damage.
securing the U-bolt to remove the condensate trap assembly.
and any debris.
oughly.
Part number 550-100-250/0819