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506746−01 05/12
Water drain
WARNING
The drain pipe must be free without back pressure.
We recommend an external anti−flooding device
(not supplied) to protect from faults of external
hydraulic circuits.
The HCSteam−16/−35 humidifier also requires a connec-
tion to a drain. The drain line may be routed out the back or
bottom of the unit using the included angle fitting. The drain
line can be 1−1/4" PVC, CPVC or polypropylene tubing
(drain line must be able to withstand 140
°
F water). The
drain line is not glued or otherwise attached to the humidifi-
er so it must be supported by itself. The humidifier includes
a drain tempering valve that runs whenever the drain pump
runs and flushes cool water into the drain line to insure the
drain water temperature never exceeds 140
°
F (60
°
C).
The drain water characteristics are:
S
Drain Rate 7.1 gal/min. (26.8 lit/min.)
S
Connection 1−1/4" (32mm)
S
Temperature 140
°
F (60
°
C)
Drain connections
When using a rear outlet drain passing through drywall, we
suggest using a 1−1/4" extension tube. When using a bot-
tom outlet drain, attach the included 90
°
fitting to the drain
outlet. The drain outlet may be rotated. Then connect a
1−1/4" trap adaptor to connect to drain pipe.
Steam Distribution
CAUTION
Do not touch steam hose when humidifier is operat-
ing!
The steam hose is a heated part. Allow to cool before
servicing.
Duct steam injection
The maximum allowed duct static pressure is 2" w.c.
The HCSteam−16/−35 humidifier include a plastic injection
nozzle (figure 7).
CONDENSATE
CONNECTION
2−1/2"
(63m)
2−1/2"
(63m)
STEAM
INLET
O.D. − 2.2" (56mm);
drill 2−1/4" (57mm)
hole in duct
Figure 7. Plastic injection nozzle
A typical installation is shown in figure 6.
NOTICE
Nozzle location is very important to the proper ab-
sorption of the steam in the air stream. Select a loca-
tion observing the following:
S
nozzle must be installed in supply duct,
S
nozzle location must be easily accessible,
S
nozzle location must allow at least 3’ (1m) of
straight metal duct without elbows or obstruc-
tions,
S
duct must be un−insulated interior, and if in un-
conditioned spaces, insulated exterior,
S
clearances shown in figure 8 must be maintained.
Installing return condensate hose
The return condensate hose from the nozzle must be
trapped. Coil the hose into a vertical loop and secure it be-
low the nozzle. This trap prevents steam from being re-
leased into the cabinet. The hose end may be run through
the knockout at the top of the humidifier and be inserted
into the hole located on top of the fill cup. See figures 6 and
9.
height
min. 8"
1/3 height
centered
min. 8"
Figure 8. Plastic nozzle installations
Installing steam hoses
NOTICE
Ninety percent (90%) of all operation problems are
created by improper steam piping from the humidifi-
er unit to the duct steam nozzle.
Make the connection between the humidifier steam hose
adapter and nozzle using only the provided hose (unsuit-
able hoses may weaken and crack causing steam leaks).
