Water Trap; Condensate Return Line - Nortec GH Series Instaliation, User & Maintenance Manual

Humidifier
Figure #21
Condensate "T6II'
At Low Point In
Steam Hose
(Consult Factory)
Not Acceptable
WIthout Trap "Tee'
Create A False Low Point To Remove Condensate Whenever
The Steam UneMust Approach The Distributor From Above.
8. If steam line is routed below steam distributor
or if the steam distributor is lower than the
humidifier, a condensate trap "tee" will be
required to remove water at this low point.
Run condensate from trap to nearest drain
lower than the distributor. See Figure #21.
9. Do not run steam line more than 1 foot per
Ib/hr output. Example, 10 Ibslhr should not
have a steam run longer than 10 feet. If long
runs are unavoidable, the humidifier should be
sized larger to compensate for condensate
losses and insulated copper should definitely
be used.
WATER TRAP
1. The GH Series humidifier produces steam at
atmospheric pressure. Pressure head must
develop to push steam through supply line and
into air duct.
2. Combined resistance of duct positive static
pressure and steam line resistance creates a
small pressure head in water tank. Total
amount of positive static pressure head is
reflected directly by water column differential
that develops in the built in water trap.
3. The built in water trap allows a maximum of
1211 W.C. pressure before steam escapes
through drain.
4. To increase allowable water column (allowable
positive static pressure) an extended field
installed water trap may be used.
- 12
5. Static pressure is usually higher when
distributor's steam outlets are faced into
downflow duct applications.
CONDENSATE RETURN LINES FOR
STEAM DISTRIBUTORS
1. Each steam distributor has a built-in
condensate return (3/8 11 0.0. copper tubing).
Flexible condensate hose (3/8
11
1.0 for GH 100,
%"
1.0. For GH 200,
%"
1.0. for GH 400)
. available from NORTEC, is recommended for
routing condensate back into humidifier's
condensate return connection for short runs.
A short length of condensate hose with clamps
is supplied with NORTEC's GH Series to serve
as a flexible coupling. DO NOT direct solder
field copper condensate line to steam
distributors. Use 3/8 11 1.0. copper for runs up
to 20 feet and
%"
1.0. for longer runs on GH
100. Use
%"
1.0. copper for runs up to 20 feet
and %" 1.0. for longer runs on GH 200 and
400.
2. Always incorporate a trap in routing of
condensate return line. Condensate that
accumulates in trap will prevent possibility of
steam escaping. Depth of trap must exceed
duct static pressure in inches of water column.
See Figure #22.
Figure #22
Depth Of Trap "Y"
Must Be 2" More Than
Duct Static Pressure
Of Water Column
Or At Least 12"
3. If the top of the condensate line trap is less
than 3' above the steam distributor, connect
condensate line to drain below humidifier.
4. If steam distributor is mounted level with or
below humidifier, condensate line must be
routed to nearest floor drain or to a
condensate pump (available from NORTEC).