Piping Methods; Drain Piping; Make-Up Water Piping - VAPORSTREAM VLC Installation Instructions And Maintenance Operations Manual

Drain Piping

A drain line should be extended from the skimmer con-
nection to a sanitary waste or suitable drain.
If non-metallic pipe or hose is used, it must be capable
of withstanding temperatures up to 100° C.
To prevent steam from escaping out the drain line, a
water seal must be provided in the drain line of suf-
ficient height to contain the pressure developed within
the humidifier and steam dispersion system.
To determine the proper height of the water seal, see
table 16-1.

Make-up Water Piping

When non-metallic water piping is used, it must be
rated to withstand 100° C or greater temperature. If not,
the final one meter connected to the humidifier should
be metallic and should not be insulated.
As part of the fill valve assembly, the needle valve
restricts the rush of cold water entering the evaporating
chamber during the fill cycle. Cold water could drop the
chamber water temperature and collapse the steam. If
the rumbling sound occurs during the fill cycle, adjust
the needle valve to decrease the water fill rate.
The VAPORSTREAM Model VLC has a 25 mm
®
internal "air gap". However, local codes may require a
vacuum breaker.

PIPING METHODS

Figure 15-1: Piping method recommended when
obstruction prevents dispersion tube from being con-
tinuously pitched back to humidifier:
100 mm
Min.
OM-698
Figure 15-2: Piping method recommended when hu-
midifier must be mounted higher than the duct:
165 mm/m Pitch
15 mm Min.
OM-699
* Refer to local codes for drain pipe size requirements.
Obstruction
15 mm Min.
DN 0 (¾") Tubing
Funnel or Floor Drain*
Optional Tubing Tee
Funnel or Floor Drain*
15