Sterling SF - Manual (Page 15)

15
VENTING (continued)
COMBUSTION AIR VENTING AND PIPING
Never operate unit heaters without
combustion air and flue gas piping in place or
severe personal injury or death may occur!
CARBON MONOXIDE!
Your venting system must not be blocked by
any snow, snow drifts, or any foreign matter.
Inspect your venting system to ensure adequate
ventilation exists at all times! Failure to heed
these warnings could result in Carbon Monoxide
Poisoning (symptoms include grogginess,
lethargy, inappropriate tiredness, or flu-like
symptoms).
1. The combustion air system installation must be
in accordance with the current National Fuel Gas
Code-NFPA 54 or ANSI Z223.1 National Fuel Gas
Code. In Canada, installation must be in accordance
with CSA-B149.1 “Installation Code for Natural Gas
Burning Appliances and Equipment” and CSA-B149.2
“Installation Code for Propane Burning Appliances
and Equipment”.
2. A Breidert Type L or Fields inlet cap, furnished by the
customer, must be installed at the termination point
of the combustion air system, Figures 6A & 7A.
3. Each unit heater MUST have it’s own combustion
air system. It MUST NOT be connected to other air
intake systems.
4. Use UL 1738 Listed single wall pipe for the vent
system. For installations in Canada, use corrosion
resistant and gas-tight, listed vent pipe conforming
with local building codes, or in the absence of local
building codes, with current CSA-B149.1, Installation
Codes for Natural Gas Burning Appliances and
Equipment or CSA-B149.2, Installation Codes for
Propane Gas Burning Equipment.
Never use pipe of a diameter
other than that specifi ed in Table 1, page 4! Never
use PVC, ABS or any other non-metallic pipe for
venting! To do so may result in serious damage
to the unit and or severe personal injury or death!
5. Long runs of single wall combustion air piping
passing through an unheated space may require
insulating if condensation becomes noticeable.
6. The combustion air system must be installed to
prevent collection of condensate. Pitch horizontal
pipes downward 1/4 in. per foot (21mm/m) toward the
inlet cap to facilitate drainage. Vertical combustion air
pipes should be piped as depicted in Figure 6A.
7. The equivalent length of the vent system must not
be less than 5 ft. and must not exceed 50 ft. (15.2m).
Equivalent length equals the total length of straight
pipe plus 10 ft. (3.05m) for each 90° elbow and 4 ft.
(1.22m) for each 45° elbow.
NOTICE: For optimum performance keep the com-
bustion air system as straight as possible.
8. Each slip joint must be secured with at least three
corrosion resistant screws. Two full turns of 3M #425
Aluminum Foil Tape or its equivalent must then be
used to seal each joint. General Electric RTV-108,
Dow-Corning RTV-732 or an equivalent may be used
instead of the tape.
9. For horizontal combustion air systems longer than 5 ft.
(1.5m), the system must be supported from overhead
building structures at 3 ft. (1m) intervals.
EXHAUST VENTING
Never operate unit heaters without
combustion air and fl ue gas piping in place or
severe personal injury or death may occur!
1. Vent system installation must be in accordance with
the current National Fuel Gas Code-NFPA 54 or
ANSI Z223.1 National Fuel Gas Code. In Canada
installation must be in accordance with CSA-B149.1
“Installation Code for Natural Gas Bur ning
Appliances and Equipment” and CSA-B149.2.
“Installation Code for Propane Burning Appliances
and Equipment”.
2. A Breidert Type L or Fields vent cap, furnished by the
customer, must be installed at the termination point
of the vent system, Figures 6A & 7A.
3. Each unit heater MUST have it’s own vent system. It
MUST NOT be connected to other vent systems or
to a chimney.
4. Use UL 1738 Listed single wall pipe. For installations
in Canada, use corrosion resistant and gas-tight,
listed vent pipe conforming with local building
codes, or in the absence of local building codes,
with current CSA-B149.1, Installation Codes for
Natural Gas Burning Appliances and Equipment or
CSA-B149.2, Installation Codes for Propane Gas
Burning Appliances and Equipment.
Never use pipe of a diameter
other than that specified in Table 1, page 4!
Never use PVC, ABS or any other non-metallic
pipe for venting! To do so may result in serious
damage to the unit and or severe personal injury
or death!
NOTICE: Combustion and exhaust venting instructions below describe two-pipe venting. If venting
concentrically, a Combustion Air Inlet Kit is required and instructions included in the kit should be followed.