Schwank IT(U) - Manual (Page 21)

GP-MSEM-BX-06A
SEM(U) / IT(U) Manual
RD: Aug 2006
RL: 06A
KH
Do not install filters on the combustion air
intake.
For ease of installation, this heater has an op-
tional fresh air intake duct hood. It can be
used as an outdoor intake hood to bring com-
bustion air to the heater from outside. If
drawing in fresh air from outside, it is recom-
mended as per common Engineering practice,
that any single wall pipe exposed to cold air
must be insulated to prevent condensation. If
heater is being vented horizontally through
Minimum air intake inlet distances:
Three feet above grade
Twelve inches from flue vent terminal of
heaters with input up to 100,000 Btu’s/hr.
Three feet from flue vent terminal of any
heaters over 100,000 Btu/hr.
13. GAS SUPPLY INSTALLATION
It is recommended that a locally approved
flexible connector supplied by the distributor,
be installed between the heater and gas pip-
ing. The heater must be isolated from the gas supply piping system by closing its individual
manual shut off valve (supplied by installer)
during any pressure testing of the gas supply
piping system.
If a rigid gas pipe connection is made, then compensation for normal gas
supply pipe expansion, and radiant tube expansion must be provided. All
piping must conform to local codes.
CAUTION:
CAUTION:
In installations where chlorinated Hydrocarbons are in use, such as Trichloroethylene or
Chloroethylene Nu it is essential that combustion air be brought in from
non-contaminated areas. Burning the fumes from these gases will create Hydrochloric
acid fumes, which are detrimental to humans, equipment and buildings. Typical sources
of other contaminants are paint removers, paints, refrigerants, solvents, adhesives,
degreasers, lubricants, pesticides, etc.
the wall and combustion air is ducted in from
outside to the Burner, it is advisable to create
a trap at the Burner. The trap is created by
dropping the pipe below the level of the tube
(much like a plumbing trap using elbows or a
flexible connector) before connecting it to the
fresh air intake on top of the Burner box, Do
not use flexible dryer hose for air inlet duct,
the corrugated sides of this tubing add too
much restriction to the air flow. A good qual-
ity industry approved insulated flex is al-
lowed.
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