11
INSTALLATION (Continued)
FAN TIME DELAY CONTROL (OPTIONAL)
Leads from the fan time delay control are factory wired to
the junction box (when ordered as an optional component).
The fan time delay control is a time delay relay
(approximately 45 seconds ON, 65 seconds OFF).
The fan time delay control is rated at 17 amps.
NOTICE: The start-up fan delay should not exceed 90
seconds from a cold start.
IMPORTANT: For all wiring connections, refer to the
wiring diagram shipped with your unit (either affi xed
to the side jacket or enclosed in the installation
instructions envelope). Should any original wire
supplied with the heater have to be replaced, it must
be replaced with wiring material having a temperature
rating of at least 105°C.
Should any high limit wires have to be replaced,
they must be replaced with wiring material having
a temperature rating of 200°C minimum.
COMBUSTION AIR PIPING
Never operate duct furnaces
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 National Fuel
Gas Code-NFPA 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” or 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, Figures 8 & 9.
NOTICE: The top of the cap is to be no less than 12
inches from the top of the exhaust vent cap. See
Figures 8 & 9.
3. Each duct furnace MUST have its own combustion
air system. It MUST NOT be connected to other air
intake systems.
4. Use single wall pipe constructed of 26 gauge
galvanized steel, or material of equivalent durability
and corrosion resistance for the combustion air
system. For installations in Canada, use pipe
constructed from .025 inch thick aluminum or 0.018
inch thick stainless steel.
Never use a pipe of a diameter
other than that specifi ed in Table 1, (“D” dia. fl ue
opening)! Never use PVC/ABS or other non-
metalic pipe for venting! To do so may result in
serious damage to the unit, 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
inch per foot (21mm/m) toward
the inlet cap to facilitate drainage. Vertical combustion
air pipes should be arranged as depicted in Figure 9.
7. The equivalent length of the combustion air system
must not be less than 5 feet (1.5m) and must not
exceed 50 feet (15.2m). Equivalent length is the total
length of straight sections PLUS 15 feet (4.6m) for
each 90 elbow and 5 feet (1.5m) 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 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
feet (1.5m), the system must be supported from
overhead building structures at 3 foot (1m) intervals.
EXHAUST VENTING
Never operate duct furnaces
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 latest edition of National Fuel Gas Code-NFPA
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” or CGA-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 8 & 9.
