Installation and Maintenance Manual

Installation: Piping
GAND-SVX01B-EN 19
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 CGA-B149.1 “Installation
Code for Natural Gas Burning Appliances and
Equipment” and CGA-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 (see Figure 11, p . 21
through Figure 14, p. 21).
Note: The top
of the inlet cap is to be no less than
12 inches (305 mm) from the top of the vent cap
(see Figure 11, p. 21 through Figure 14, p. 21).
3. Use single wall pipe constructed of 26 gauge
g
alvanized steel or a material of equivalent durability
and corrosion resistance for the combustion air
system.
4. Long runs of single wall combustion air piping passing
through a
n unheated space may require insulating if
condensation becomes noticeable.
5. The combustion air system mu
st be installed to
prevent collection of condensate. Pitch horizontal
pipes downward 1/4 inch per foot (21 mm/m) toward
the inlet cap
to facilitate drainage. Vertical combustion
air pipes should be piped as depicted in Figure 11 ,
p. 21.
6. The equivalent length of the vent air system must not
be less
than five feet (1.5 m) and must not exceed
50 feet (15.2 m). Equivalent length equals the total
le
ngth of straight pipe, plus 10 feet (3.1 m) for each
90-degree
elbow and five feet (1.5 m) for each
45-degree elbow
.
Note: F
or optimum performance, keep the
combustion air system as straight as possible.
7. Each slip joint must be secured with at least three
cor
rosion 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.
8. For horizontal combustion air systems longer than five
feet (1
.5 m), the system must be supported from
overhead building structures at three-foot (1-m)
intervals.
Exhaust Venting
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 CGA-B149.1 “Installation Code for
Natural Gas Burning Appliances and Equipment” and
CGA-B149.2 “Installation Code for Propane Burning
Appliances and Equipment”.
2. A Breidert Type L or Fields vent cap, furnished by the
cu
stomer, must be installed at the termination point of
the vent system (see Figure 11 , p . 21 through
Figure 14, p. 21).
3. Use single wall pipe constructed of 26 gauge
g
alvanized steel or a material of equivalent durability
and corrosion resistance 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 CAN/CGA-B149.1, “Installation
Codes for Natural Gas Burning Appliances and
Equipment” or CAN/CGA-B149.2, “Installation Codes
for Propane Gas Burning Appliances and Equipment”.
4. Any run of single wall vent pipe passing through an
un
heated space must be insulated with an insulation
suitable to 550°F (288°C).
5. The vent system must be insta
lled to prevent collection
of condensate. Pitch horizontal pipes downward 1/
4 inch per foot (21 mm/m) toward the vent cap to
facili
tate drainage. Vertical vent pipes should be piped
WARNING
Risk of Fire and Carbon Monoxide
Poisoning with Improper Piping!
Never use pipe of a diameter other than that specified
in Table 1, p. 10! To prevent pipe from melting and
introducing exhaust fumes into the air supply, never
use PVC, ABS or any other non-metallic pipe for
venting! Failure to follow these recommendations
could result in death or serious injury or equipment
damage.
WARNING
Carbon Monoxide!
Never operate without combustion air and flue gas
piping in place. Each unit MUST have its own
combustion air system and MUST NOT be connected to
other vent systems or to a chimney. 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 follow these recommendations could result in death
or serious injury.
WARNING
Risk of Fire and Carbon Monoxide
Poisoning with Improper Piping!
Never use pipe of a diameter other than that specified
in Table 1, p. 10! To prevent pipe from melting and
introducing exhaust fumes into the air supply, never
use PVC, ABS or any other non-metallic pipe for
venting! Failure to follow recommendations could
result in death or serious injury or equipment damage.