(8)For electric humidifiers (NHTC & NHPC only) using a small size blower pack (<30 lbs/hr), steam lines require 7/8” O.D. (Nominal ¾”) copper tubing. For steam runs longer than 20 ft, use insulated nominal 1” copper to ensure draining of condensate.
(9)When using the GS, SE, or NHRS Humidifiers with a RO / DI water supply, all steam lines should be in stainless steel.
(10)Do not use plastic pipe for steam distribution or hose other than NORTEC supplied. Substitution will void warranty.
(11)If steam line is routed below the blower pack, or if the blower pack is lower than the humidifier, a condensate trap “tee” will be required to remove water at this low point. Run the condensate from the trap to the nearest drain lower than the blower pack. See Figure 5 Condensate Removal.
(12)Do not run the steam line more than 1 foot per lb/hr output. Example, 10 lbs/hr should not have a steam run longer than 10 feet. If long runs are unavoidable, the humidifier should be sized larger to compensate for condensate losses and insulated stainless steel or copper must be used.
D.CONDENSATE RETURN LINES
(1)NORTEC blower packs have
(2)Always incorporate a trap in routing of condensate return lines. Condensate that accumulates in trap will prevent possibility of steam escaping. Depth of the trap must be equal or more than 3” (76 mm) See Figure 6 Condensate Return Line Trap.
(3)Ensure the trap is at least 3 feet (1 m) below the blower pack and as close to the floor drain as possible.
E.PRIMARY VOLTAGE CONNECTION
(1)All blower packs for SE and GS unit are wired by others to be powered by an independent circuit. Follow all codes.
(2)A control thermostat, mounted on the blower pack, automatically starts the fans when steam is detected.
(3)NH Series remote mounted blower packs wired to a humidifier or independent circuit require field wiring between two primary voltage terminal blocks and two low voltage control (class 1 circuit wiring required) terminal strips; one of each located in humidifier and remote blower pack cabinet.
(4)Field wiring of remote blower packs must conform to national and local electrical codes. Refer to wiring diagram supplied at the back of this manual (See page 9).
