Nortec NHPC 10-10, B.Condensate Return, Page, Unit Size, Steam Output, Distance, Possible Losses

(3)NORTEC recommends the use of insulated hard copper steam lines on distances of more than 10 feet and no more than 3 elbows (90⊃). The use of flexible steam hose on runs of more than 10 feet can reduce these recommended distances in Table 14 by as much as 25%. Steam hose can crimp and cause back pressure.

Table 14. Maximum Recommended Length of Steam Runs

Unit Size	Steam Output	Distance	Possible Losses
NH-005	5 lbs/hr	8 feet	1.0 lbs/hr
NH-010	10 lbs/hr	15 feet	1.5 lbs/hr
NH-020	20 lbs/hr	20 feet *	2.0 lbs/hr
NH-030	30 lbs/hr	25 feet *	2.5 lbs/hr
NH-050	50 lbs/hr	40 feet **	4.0 lbs/hr
NH-075	75 lbs/hr	50 feet **	5.0 to 10.0 lbs/hr
NH-100	100 lbs/hr	50 feet **	5.0 to 10.0 lbs/hr
NH-150	150 lbs/hr	50 feet/cylinder **	5.0 to 10.0 lbs/hr
NH-200	200 lbs/hr	50 feet/cylinder **	5.0 to 10.0 lbs/hr

* Use one inch copper steam supply for longer runs. ** Use two inch copper steam supply for longer runs.

NOTES: 1. This table gives the maximum recommended length of steam run by unit size.

2.The use of any steam line other than copper or NORTEC supplied steam hose will void the warranty and may adversely effect the operation of the humidifier.

(4)Steam lines should slope upwards from the humidifier to the steam distributor. (See Figure 7.)

(5)Flexible steam hose, if used, must be supported to avoid crimps, bends, and sags. (Please consult local agent if proper slopes are not available.)

(6)If the steam supply line must be routed below the humidifier location, a condensate trap ‘tee’ will be required to prevent blockage at the low point in the steam line. Run the condensate hose to the nearest floor drain after trapping. (See Figure 8.)

(7)Long steam runs with improper slopes can produce spitting at the distributor because the steam is travelling at a high velocity and will push condensate out the distributor. If a slope of 2" for every 12" of steam run cannot be achieved, then condensate must be removed before the distributor. (See Figure 4.)

B.CONDENSATE RETURN

(1)Each steam distributor has a built-in condensate return. (See Figure 9.) Flexible condensate return hose (available from NORTEC) is recommended for routing condensate back into the humidifier’s fill cup, or to a drain. A short length of d" OD copper tubing is supplied by NORTEC when routing condensate hose back to the fill cup. Similarly, a short length of d" condensate hose is supplied to serve as a flexible coupling with field-supplied copper condensate line. Long condensate runs should be drained to a floor drain to prevent excessive condensate water from entering the cylinder.

NOTE

Excessively long steam runs (over 20 feet) may require the use of ½" OD condensate return lines – supplied by others.

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Page 34 2008-10-01