Dunkirk Q95M-200 Modulating Condensing Boiler - Manual (Page 11)

7.5 Condensate Drain Piping
Boiler is factory equipped with a condensate trap.
Additional trap is not required and should NOT be used.
• Use supplied 1/2” PVC tee, transition to ½” pipe and
fittings for PVC condensate drain line.
• The ½” diameter schedule 40 PVC or CPVC condensate
drain and pipe fittings must conform to ANSI standards
and ASTM D 1785 or D2846.
• Schedule 40 PVC or CPVC cement and primer must
conform to ASTM D2564 or F493. In Canada, use
CSA or ULC certified schedule 40 PVC drain pipe and
cement.
• Condensate pump with reservoir (not furnished) to
remove condensate to drain line (sanitary line) above
boiler if floor drain is not available or is inaccessible.
7.6 Filling Condensate Trap with Water
On initial start up manually fill condensate trap with water.
Following are steps required to initially fill condensate trap
for start up. Steps are only required at initial start up or if
maintenance requires draining of condensate trap.
1. Remove vent drain line from CPVC vent pipe. Pour
about 1 cup of cold tap water into vent drain line.
2. Excess water should go through overflow and out
through condensate drain line. Verify proper operation
of drain line (or external condensate pump if used).
3. Reinstall vent drain line.
7.7 Chilled Water Piping
Install Boiler, when used in connection with refrigeration
system, so chiller medium is piped in parallel with boiler
with appropriate valves to prevent chilled medium from
entering boiler.
Piping system of hot water boiler connected to heating coils
located in air handling units where they may be exposed
to refrigerated air circulation must be equipped with flow
control valves or other automatic means to prevent gravity
circulation of boiler water during cooling cycle.
7 - NEAR BOILER PIPING
11