3-5
STARTUP AND COMMISSIONING
DC SERIES BOILERS / WATER HEATERS
DC 15-95, DC 15-96, DC 20-125, DC 33-160
Back Flow Insert.
Note NG-only
flappers shown.
Dual-fuel flapper is
black.
Figure 36A: Blower (Torin) and Gas Valve Assembly
(all models except HC/DC 15-95)
Figure 37: Orifice and O-ring
WARNING
Each DC series boiler / water
heater is equipped with a
Back Flow Valve installed at
the outlet of the fan. Inspect
the Back Flow Valve annually.
WARNING
When converting a Natural
Gas boiler / water heater
to Propane, the Back Flow
Flapper must be replaced
with the black Propane Back
Flow Flapper, if not already
installed (see instructions in
fuel conversion kit). Failure to
use the Propane Flapper may
result in damage to the boiler,
serious injury or death.
3.5.1 Gaining access to combustion chamber, burner
removal instructions
DIS-ASSEMBLY
1.
Turn off the main power switch to the boiler / water heater.
2.
Turn off the gas supply valve to the boiler / water heater.
3.
There is no need to drain the boiler’s water unless the boiler / water heater
will be subject to freezing conditions while the boiler / water heater is off.
4.
Remove the front cover and allow the boiler / water heater to cool.
Figure 36B: Blower (EBM) and Gas Valve Assembly
(HC/DC 15-95 only)
