Sterling SC - Manual (Page 19)

19
VENTING (continued)
COMBUSTION AIR VENTING AND PIPING
Never operate unit heaters
without combustion air and fl ue 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 latest edition of (N.F.P.A. 54)
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 inlet cap, furnished by
the customer, must be installed at the termination
point of the combustion air system, Figures 7A,
7B, 8A & 8B.
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 Appliances and Equipment.
Never use pipe of a diameter other
than that specified in Table 1! 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" per foot (21mm/m) toward the
inlet cap to facilitate drainage. Vertical combustion air
pipes should be piped as depicted in Figure 7A.
7. The equivalent length of the combustion air system
must not be less than 5' (1.5m) and must not exceed
50' (15.2m). Equivalent length equals the total length
of straight pipe, plus 10' (3.05m) for each 90° elbow
and 4' (1.22m) for each 45° elbow.
NOTICE: For optimum performance keep the
combustion 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'
(1.5m), the system must be supported from overhead
building structures at 3' (1m) intervals.
EXHAUST VENTING
Never operate unit heaters with-
out 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 latest edition of (N.F.P.A. 54) 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 vent cap, furnished by
the customer, must be installed at the termination
point of the vent system, Figures 7A, 7B, 8A & 8B.
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! 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.