Specifications

DRI-STEEM XT Electrode Steam Humidifier Installation, Operation, and Maintenance Manual • Page 13
Installation
Piping:
Supply water and drain
Figure 13-1:
Drain piping detail
OM-7589
* Hose clamp and black rubber hose ship with each humidifier;
they can also be ordered from DRI-STEEM. See the
replacement parts section of this manual for part numbers.
Important: Thoroughly flush the
supply water piping to remove pipe residue
and stagnant water before connecting piping
to the humidifier. Pipe residue and stagnant
water in the water supply piping can cause
foaming, preventing the humidifier from
reaching the required steam capacity.
WARNING
Hot drain pipes
Drain piping surface may be hot. Touching
or contact with hot pipe may cause severe
personal injury.
Piping drawings:
See the piping drawings on Pages 14 and 15.
Black rubber hose*
¾" (DN20) I.D.
Open drain
1" (25 mm) air gap
Pitch 1/8”/ft (1%) towards drain
Hose clamp*
To drain
Supply water piping
Use only copper for supply water piping; do not use rubber or
plastic. The standard supply water connection before the fill valve is
a 1/4" FIP strainer.
Note: The supply water connection size is 3/8"BSP [DN10] in Europe.
In cases where water hammer may be a possibility, consider
installing a shock arrestor. Water pressure must be 25 to 80 psi
(175 to 550 kPa).
Drain piping
Drain piping must be code-approved, ¾" (DN 20) ID material rated
for 212 °F (100°C) minimum.
The XT drain cup has an integral grounding plate and requires
a field-installed 1" (25 mm) air gap to a drain funnel to prevent
conduction of electricity in the drain line.
The XT humidifier tempers drain water by opening the fill valve
whenever the drain valve is energized, which automatically cools
drain water before it enters the drain. Drain water tempering is
intended to keep water entering the drain line no hotter than 140°F
(60°C). However, manually energizing the drain valve when the
supply water is shut off can allow 212 °F (100 °C) water to enter the
drain line.
Observe following precautions when selecting and installing drain
piping to ensure personal safety and material integrity:
• When using copper or other metallic drain piping, ground the
drain piping to the earth ground lug in the XT humidifier.
• Chlorinated polyvinyl chloride (CPVC) piping is a non-metallic
alternative for drain piping. It is rated up to 212°F (100°C) for
intermittent-use, low-pressure applications.
The connection size for the steam cylinder drain is 1" (DN25) hose.
Do not reduce this connection size.
If drainage by gravity is not possible, use a reservoir pump rated for
212 °F (100 °C) water.
A drain hose is provided to function as the flexible connection from
the drain cup to the field-installed open drain. See Figure 13-1.
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