71
110331-07 - 8/23
PHTM II
Combi Installation, Operating & Service Instructions
WARNING
Component Damage.
Do not over tighten burner door mounting nuts.
Doing so could break burner door mounting
studs. If any of these studs is damaged, heat
exchanger must be replaced. Use of a short 10
mm box wrench will reduce risk of damaging
these nuts.
18
Service and Maintenance
(continued)
Figure 18-5: Condensate Trap Exploded Parts View
Condensate Tube
from heat exchanger
Condensate
Trap Vent
Condensate Trap
Ball Float
Float
Support
Gasket
Float
Support
Cleanout
Cap O-Ring
Cleanout
Cap
Cleanout
Cap Nut
Trap Vent
(bottom panel)
NOTICE:
Attempting to clean heat exchanger
or trap with anything other than water or vinegar
could damage heat exchanger or result in
condensate backup, causing boiler to shut down.
10.
Reinstall burner door/blower assembly.
Follow above steps in reverse order.
!
11.
Inspect vent system.
A. All gaskets and joints between boiler heat
exchanger and terminal are leak tight.
B. All supports are intact and vent system is
properly pitched.
C. All pipe is in good condition. Look for
damage such as cracks, heat distortion,
and embrittlement. If any such damage is
found, pipe must be replaced and cause of
damage identified.
D. Vent/air terminals are in good condition,
free from blockage and still correctly
located relative to doors, windows, decks, etc.
WARNING
Asphyxiation Hazard.
Do not operate boiler without condensate trap
ball and ball support in place. Doing so could
cause products of combustion and or carbon
monoxide to enter building resulting in severe
personal injury, death or substantial property
damage.
!
9.
Inspect and clean condensate trap.
A. Place bucket under condensate clean out
cap on bottom of boiler (Figure 18-5) to catch
water in trap as well as ball and support.
B. Unscrew cap, being careful not to lose ball or
ball support.
C. Flush any debris found in trap with water - do
not use other cleaning agents. Reassemble
trap as shown in Figure 18-5.