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Do not install filters on the combustion air intake.
For ease of installation, this heater has an optional
fresh air intake duct hood. It can be used as an
outdoor intake hood to bring combustion air to the
heater from outside. If drawing in fresh air from
outside, it is recommended as per common Engi-
neering practice, that any single wall pipe exposed
to cold air must be insulated to prevent condensa-
tion. If heater is being vented horizontally through
the wall and combustion air is ducted in from out-
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.
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.
13. GAS SUPPLY INSTALLATION
It is recommended that a locally approved flexi-
ble connector supplied by the distributor be in-
stalled between the heater and gas piping.
CAUTION:
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.
SEE SECTION 14: ( PAGE 21) HEATER EXPANSION
side 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 connec-
tor) 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 quality industry approved insulated flex is
allowed.
Three feet from flue vent terminal of any
heaters over 100,000 Btu/hr.
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.
Page 19
GP-MSJV-BX-07A
STV-JZ Manual
RD: MAR 2009
RL: 07A - BA
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