Nortec 132-3091 manual Electrical, Steam Line and Condensate Return Line

has been improved to prevent backup despite long or gently sloped drain lines but it can not compensate for flat or uphill runs.

2.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, since drain water from humidifier can be very hot.

3.Keep drain lines as short as possible. Keep drain lines sloped down, not level and not up since low spots in drain lines will accumulate sediment and cause backup. The drain line should be 7/8" O.D. copper pipe or larger. Do not use plastic pipe for drain lines. Consult factory.

Figure #7

Drain Connection

ClampAnd

1.5” I.D. Hose

Factory Supplied

Air Gap

Stainless steel Reducer To

ServeAs Funnel

Drain (By Others)

2" O.D. StainlessSteel Pipe

Or 2" I.D.DI Compatible Hose

(Not Supplied)

NOTE: Steam hose should not reach bottom of the funnel.

STEAM LINE AND CONDENSATE RETURN LINE

1.Refer to the installation manual of the steam distribution system used in your application. Steam Distribution - Form #XX-231, SAM-e - Form #XX-249, Blower Pack - Form #XX-239.

ACCESSORIES - FILL CUP EXTENSION KIT(S)

1.The NH Series humidifier is an electrode humidifier. It 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 steam cylinder. Total amount of positive static pressure head is reflected directly by water column differential that develops between water in the fill cup hose feeding cylinder and water level in cylinder.

3.Standard dimensions of humidifier limit static that can be tolerated before water will be pushed high enough to spill over into overflow tube in fill cup assembly.

4.To increase allowable water column (allowable positive static pressure) an accessory Fill Cup Extension Kit is available from NORTEC. See Figure #8.

Figure #8

Fill Cup Extension Kit to Overcome Static Pressure

Fill Cup Bracket
Fill Cup
Overflow Hose
Fill Hose To	Hose From Fill Valve
Cylinder

5.Water column requirements are even higher duct static pressure when distributor’s steam outlets are faced with downflow duct applications.

ELECTRICAL

PRIMARY VOLTAGE SUPPLY WIRING TO HUMIDIFIER

1.Check and ensure that available voltage and phase corresponds with operating voltage and phase of humidifier as indicated on the humidifier nameplate label (see Figure #1).

2.Ensure that an adequate power supply is available to carry full humidifier amperage drawn as specified by rated amps on the humidifier nameplate label refer to local codes.

3.A dedicated external disconnect must be installed. Do not exceed the maximum circuit protection amps as indicated on the nameplate label.

4.Optional internal primary fuses are not intended to substitute for external fuses. Internal primary fuses are a factory added option (when specified) to protect internal primary wires individually.

5.Connect ground wire to cabinet ground clamp. Do not use neutral wire of four wire supply as ground.

6.Single phase humidifiers may be run on three phase power, but load may unbalance power grid.

7.External wiring sizes must be in accordance with NEC and/or CEC and existing local electrical codes and by-laws.

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