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11. It is recommended that single distributors are
mounted near the bottom of the duct to ensure
the steam is dispersed into the majority of the
air flow. See Figure #13.
12. With multiple steam distributors, the top steam
distributor should be at least 8" below top of
duct to avoid possible condensation on
surface of duct. The remainder of space
below is proportioned accordingly. See Figure
#14. For short steam absorption systems see
Figure #15.
Figure #14
MIN. H-16"
Figure #15
MIn.W-12"
H2O"
W17"
/ Steam Header
PLUMBING
NOTE: All water supply and drain line
connections should be installed in accordance with
local plumbing codes.
NOTE FOR OUTDOOR ENCLOSURE: Water
supply should be routed through the bottom grille of
the enclosure. If freezing conditions occur, water lines
must be heat traced up to the unit.
- 12-
WATER SUPPLY LINE
1. The humidifier is intended to operate on cold
potable tap water.
2.
DO NOT use a hot water source to su pply the
humidifier. Minerals will adhere more easily to
surfaces and the fill valve's small flow
regulating orifice could become plugged.
3.
Consider using a water softener. Longer
operating times between tank cleaning will be
reached on softened water.
4.
Reverse osmosis (RO) water can provide very
long times before cleaning is required since it
is cleaner than softened water. However, it is
also more corrosive. Consult factory before
using. Deionized (01) water may be used with
specific models. Consult NORTEC
rep resentative.
Figure #16
Control Circuit
-rr==:::::~~'"
Water Connection
Gas Connection
Drain Connection
5.
Standard fill valves are sized for water
pressure ranging from 30 to 80 psig (ideally 55
to 60 psig). For other pressures, consult
factory. This pressure should be measured at
the humidifier if the water pressure is suspect.
6.
ALWAYS supply and install a shut off valve in
the water supply line dedicated to the
humidifier to facilitate servicing. Use
%" 00
copper to within 4 feet of the humidifier.
Reduce copper to 3/8"
00
and connect to the
factory-supplied 3/8" olive compression fitting
on the side of the humidifier.
NOTE FOR OUTDOOR ENCLOSURE:
Manual shut off valve should be provided both
at the unit and inside the building for additional
safety if freezing condition may occur.
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