Nortec RH - Page 12

9 | Installation
Plumbing
Figure 6: Water Supply and Drain Connection
• All water supply and drain line connections should be installed in accordance with local
plumbing codes.
• Supply water should at 30 to 80 PSIG and be between 150-1200 Microsiemens (Hardness
0-12 GPG). Consult factory for water conditions outside of this range. Water softener may
be used if conductivity remains in recommended range.
• Install water shut off valve before humidifier to facilitate servicing.
• The drain line should not end in a sink used frequently by personnel, or where plumbing
codes prohibit it. Route to a floor drain or equivalent for safety reasons.
• Insure drain line is adequately sized to provide free and easy draining and that an air gap is
installed as shown. A restricted drain can cause cylinder water to over concentrate and
result in poor operation.
• If a drain is not located near the humidifier use a condensate pump rated for hot drain water
such as Nortec’s Part Number 1429527.
Note:
• Drain water is very hot, do not drain to public sink.
• Do not use plastic pipe for drain.
For humidifiers installed in some cities including the City of Los Angeles:
A city-approved spring-loaded double ball CHECK VALVE must be installed by
contractor on the potable water inlet to the humidifier. Recommended valve
manufacturer: Watts Regulator, phone number 508-688-1811, Size depending on
supply line 1/4”, 3/8”, or 1/2” NPT inlet and outlet, Model #7.
1.2 in. (30 mm). OD
un-threaded outlet
with factory supplied
bent hose and clamp.
Always install a water
shut-off valve.
1/8 in. NPT
Use 1/4 in.
compression
fitting to connect
supply line to
unit.
*Pipe and water shut-off valve not supplied by Nortec.
Use 1/2 in. OD copper to within 4 ft (1.2 m) of humidifier
Note:
1 Fill and drain lines
can also be routed
through opening in
back of cabinet.
2 Optional cover
2548313 Is available
to conceal plumbing
connections.
Air gap required. 2 1/2 in. to 7/8 in.
Copper reducer is ideal. (NORTEC option
P/N 2522172) Hose must not
touch the bottom of the funnel.
Min. 7/8 in. OD drain line.
Keep as short as possible.
Slope down to floor
drain or main drain.