Gas Piping - Nortec GH Series Installation, User & Maintenance Manual

8. Optional stands are available for all GH Series
humidifiers. Refer to Shop Drawing Package,
Form # 273 for details and part numbers.
9. Clearances around the unit should also be
maintained for good access to the gas
humidifier. 3 feet clearance is needed on the
right side of the cabinet for GH100/200, 4 feet
is needed on the right side of the cabinet for
the GH300/400. The front requires 3 feet
clearance for all capacities.
10. DO NOT mount humidifier on hot surfaces.
11. DO NOT mount humidifiers in an area where
freezing may occur.
12. If humidifiers are mounted on roof, a properly
ventilated, temperature controlled, (above
freezing), weatherproof enclosure must be
used. Consult your local representative for
more information on Nortec's enclosure.
13. DO NOT mount humidifiers on vibrating
surface. Consult factory.
14. In earthquake prone areas do not wall mount.
Use the existing wall mount brackets to fasten
unit to the wall with it sitting on the floor.
Maintain spacing for air openings. (See
"Installation" item 8).
NOTE FOR OUTDOOR ENCLOSURE:
1. Optional outdoor enclosure can also be used;
unit is factory mounted inside the enclosure.
2. The enclosure should be installed at a secure
distance from any air or exhaust system. (also
see local code).
3. The enclosure should be bolted down or
secured if it is to be exposed to high winds.
4. If lifting the enclosure on the roof using a
forklift, lift under the unit at cross members for
stability. (Strapping belts can also be used.)
5. Clearances around the unit should also be
maintained for good access to the gas
humidifier. 3 feet of clearance is needed on
the right side of the cabinet for GH100/200, 4
feet is needed on the right side of the cabinet
for the GH300/400. The front requires 3 feet
clearance for all capacities.
Installation of piping must be in accordance with
local codes, and ANSI Z233.1, "National Fuel Gas
Code," in the United States or CAN/CGA-B149
Installation Codes in Canada.
The following table indicates the maximum and
minimum allowable gas pressures for the Gas
Humidifier.
GAS
Natural
Propane
The gas inlet pipe size to the appliance is:
½" NPT for GH 100
3/4" NPT for GH 200
1" NPT for GH 300 / 400
Provide an adequate size gas supply line.
When black iron gas pipe is used, a sediment trap
must be located ahead of the humidifier gas controls.
In all installations, a manual shut off valve, located
outside the cabinet, must be installed. See Figure #4.
#1: Shut-off Gas Valve
#2: Sediment Trap
Leak test all gas connections using a commercial
soap solution made to detect leaks. Bubbles indicate
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GAS PIPING

INCHES W.C.
MIN. MAX.
4.5 14.0
9.0 14.0
Figure #4
1
2