Instructions

PRESTIGE Solo 175 & 250
Service Parts Instructions
4
Check Ventilation Air Openings
1. Verify that all ventilation openings to the
mechanical room or building are open and
unobstructed. Check the operation and wiring
of any automatic ventilation dampers.
2. Check and verify the vent discharge and the
combustion air intake are free of debris and
obstructions.
Inspect Vent and Combustion Air Piping
1. Visually inspect the venting system and com-
bustion air piping for blockage, deterioration or
leakage. Repair any deficiencies.
2. Verify that the combustion air inlet piping is
connected, sealed and properly supported.
3. Inspect the vent outlet adaptor gasket at the top
of boiler cabinet and look for signs of flue gas
leakage. Replace gasket if necessary, see Fig. 2.
4. Inspect stainless steel test port (Fig. 2) for any
signs of deterioration, if present replace entire
vent outlet adapter immediately.
5. Inspect vent/heat exchanger gasket and look for
signs of flue gas leakage. Replace gasket if nec-
essary, see Fig. 3.
Failure to inspect the vent system and combus-
tion air inlet piping and to have any conditions
repaired, can result in severe personal injury or
death.
Check Boiler System
1. Verify all system components are correctly
installed and operating properly.
2. Check the cold fill pressure for the system, typ-
ical cold water fill pressure is 12 psig.
3. Verify the system pressure, as the unit operates at
high temperature, to ensure the pressure does not
exceed 25 psig. Excessive pressure reading indi-
cates expansion tank sizing is incorrect or system
performance problems.
4. Inspect air vents and air separators in the sys-
tem. Remove the caps on automatic air vents
and briefly depress the valve stem to flush vent.
Replace the cap when completed. Ensure vents
do not leak, replace any leaking air vents.
Tighten cap on new air vent equipped with
hygroscopic cap.
WARNING
Vent/Heat
Exchanger
Gasket
Heat Exchanger
Adapter
Vent Outlet
Adapter
Fig. 3: Removal of Vent Outlet Adapter
Vent Outlet
Adapter
Test
Port
Banding
Clamp
Mounting
Screws
(4) Each
Vent Outlet
Adapter Gasket
Fig. 2: Stainless Steel Vent Outlet Adapter