12
condEnsatE dRaIn REQuIREMEnts
Condensate drain line to be pitched down to floor drain
at a minimum of ¼” per foot. An external condensate
pump (not furnished) may be used if floor drain is not
available. The condensate pump must be designed
for flue gas condensate application.
Vii. Near Boiler PiPiNg
Figure #10
condEnsatE dRaIn pIpIng
Notes:
1. Condensate trap is to be built in the field per
Figure #10
2. Wood frame or blocks may be used to raise the
boiler to maintain drain pitch or to be above ex-
ternal condensate pump reservoir.
3. There is a 115 volt AC receptacle provided on the
service switch junction box which is located at the
boiler right side, to provide power for an external
condensate pump
(if needed)
.
condEnsatE dRaIn pIpIng
The condensate trap is to be field installed as previ
-
ously shown in
Figure #10
. Provided are ½” PVC fit
-
tings for the condensate drain trap (assembled in the
field). The condensate drain is to be pitched down to
the floor drain at a minimum of ¼” per foot.
The ½” diameter schedule 40 PVC condensate drain
piping and pipe fittings must conform to ANSI stan
-
dards and ASTM D1785 or D2846. Schedule 40 PVC
cement and primer must conform to ASTM D2564 or
F493. In Canada, use CSA or ULC certified schedule
40 PVC drain pipe and cement.
A condensate pump with a reservoir (not furnished)
may be used to remove condensate to a drain line
(sanitary line) above boiler if a floor drain is not avail
-
able or is inaccessible.
FIllIng condEnsatE tRap WItH WatER
oN iNitial start UP tHe coNDeNsate
traP MUst Be MaNUallY FilleD witH
water.
The following are the steps required to initially fill the
condensate trap for start up, these steps are only re-
quired at the initial start up or if maintenance requires
draining of the condensate trap:
1. Pour about 1 cup of cold tap water into the conden-
sate trap vent.
2. Excess water should go through the condensate
drain line. Verify proper operation of the drain line
(and external condensate pump if used).
cHIllEd WatER pIpIng
The boiler, when used in connection with a refrigera-
tion system, must be installed so the chiller medium is
piped in parallel with the boiler with appropriate valves
to prevent the chilled medium from entering the boiler.
The boiler piping system of a hot water boiler con-
nected to heating coils located in air handling units
where they may be exposed to refrigerated air circu-
lation must be equipped with flow control valves or
other automatic means to prevent gravity circulation
of the boiler water during the cooling cycle.
