Liebert SGH Steam Installation And Operation Manual page 9

3. Liebert steam supply hose or field-supplied
piping should be sloped downwards from the
steam distributors to the humidifier. Slope
should be at least 2" in 12" to promote
condensate runback. See Figure #18. If this
slope is not possible, condensate must be
removed before the distributor. See Figure
#19.
Figure #19
Long Steam Lines
Condensate To Drain
4. Minimize the length of steam line and keep it
as straight as possible, minimizing bends.
Also, avoid using 90 elbows. Wherever
possible, use long radius turns (using tube
bender on oversized copper or pairs of 45
elbows). This will reduce the condensate
generated by heat loss. This will also reduce
the back pressure and avoid the need to
buy/install an accessory Fill Cup Extension Kit.
See Figure #22.
5. Ensure that the steam hose does not kink or
sag. The steam hose becomes more flexible
when hot. The hose should be supported to
prevent water traps. Only use steam hose for
connections or steam lined runs of 5 feet or
less. See Figure #20.
Figure #20
Steam Hose Routing
AVOID WATER TRAPS
AVOID KINKS
PROPER
SLOPE
GENTLE
SWEEPING
TURNS
6. To ensure odor-free steam, always use Liebert
steam hose. Check steam hose and hose
couplings periodically for cracks, breaks,
kinks. Replace as required. DO NOT
substitute hose. Liebert is not responsible for
health effects or damage from substitute hose.
7. Steam lines for SGH 050 through 200 require
1-5/8" O.D. (nominal 1-1/2") copper pipe. For
steam runs longer than 40 ft use insulated
nominal 2" copper to ensure the draining of
condensate.
8. Do not use steel or plastic pipe for steam
distribution, or hose other than Liebert
supplied. Substitution will void warranty.
9. If steam line is routed below steam distributor
or if the steam distributor is lower than the
humidifier, a condensate trap 'tee' will be
required to remove water at this low point.
Run condensate from trap to nearest drain
lower than the distributor. See Figure #21.
Condensate Tee at any Low Point in Steam Line
HUMIDIFIER
CONDENSATE "TEE"
AT LOW POINT IN
STEAM HOSE
CONSULT FACTORY
CREATE A FALSE LOW POINT TO REMOVE
CONDENSATE WHENEVER THE
STEAM LINE MUST APPROACH THE
DISTRIBUTOR FROM AB OVE.
10. All built-on blower packs are factory-fitted with
all steam hose connections. No further work
is required.
11. Do not run 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 copper should definitely
be used.
- 7 -
Figure #21
NOT ACCEPTABLE
WITHOUT TRAP "TEE"
DUCT
OBSTRUCTION
TO FLOOR
DRAIN