Nortec SE Series - Manual (Page 17)

Installation | 14
Plumbing
Figure 9: Water Supply and Drain Connection

All water supply and drain line connections must be installed in accordance with local
plumbing codes.

See Table 3 and Table 4 on page 7 for supply water flow requirements.

Install water shut off valve and union before humidifier to facilitate servicing.

Insure drain line is adequately sized to provide free and easy draining and that an air gap is
installed as shown. See Table 3 and Table 4 on page 7 for flow requirements.

Auxiliary drain connection with manual shut off valve is recommended for all units. Valve to
be left closed on units without freeze protection option installed. Valve to be left open on
units with freeze protection option installed except during servicing.

High hardness or silica content supply water may require increased maintenance.

Unit damage caused by water quality outside of the specified ranges is not covered under
warranty.
Note:

Drain Water is very hot, do not use plastic pipe for drain or condensate lines, do not
drain to public sink. Route to floor drain or equivalent.

Supply cold potable water, deionized water or reverse osmosis water at 30 - 80 PSIG.
Hardness 5-7 grain or 90 – 120 mg/l (as Ca +2 as CaCO
3
)
Total Dissolved Solvents (TDS) 0.5-3 mg/l or Conductivity 1 to 70 mho/cm
Chlorides 0-25 ppm PH 7.2-8.5 Alkalinity 30-130 mg/l (as CaCO
3
)
pH 7.2-8.5 TDS 0.5 – 30 Mg/l
Min. 1 1/4 in. OD drain line.
Slope down. Increase size
if combining multiple drains.
0.75 in. (19 mm). OD
un-threaded drain outlet
Connect with hose cuff
and hose clamps.
Air gap required.
2 1/2 in. to 1 1/4 in. copper
reducer is ideal.
Hose/line must not touch
the bottom of the funnel.
Always install a water
shut-off valve.
1/2 in. NPT
Use union to connect
supply pipe to unit.
*Pipe, unions, and water shut-off valve not supplied by NORTEC.
Axillary drain, 1/2 in. female NPT
For draining tank without pump. Leave
valve closed except if freeze protection is installed.