Page 14 of 36
506307-01
Issue 1207
ELECTRICAL CONNECTIONS
When installed, the furnace must be electrically grounded
in accordance with local codes or, in the absence of local
codes, with the (U.S.) National Electrical Codes, ANSI/NFPA
70 or CSA Standard C22.1; Part 1 Canadian Electrical Code.
For proper installation refer to furnace rating label for
electrical ratings and for the field wiring of this unit refer to
furnace wiring specifications on page 5 or alternately from
the wiring diagram on page 25. In all instances, other than
wiring for the thermostat, the wiring to be done and any
replacement of wire shall conform with the temperature
limitation for Type T wire [63°F rise (35°C)].
The electrical connections and the thermostat
connections are made through the openings on the side of
the control box.
The control system depends on the correct polarity of
the power supply. Connect “Hot” (H) wire and “Ground” (G)
wire as shown in furnace wiring specification on wiring
diagram. Use reference Table on page 3 (Furnace
Specifications), for over current protection, max unit amp
rating and wire size. Use copper wire only for 115V-supply
service to unit. When replacing any original internal wiring,
use only 105°C, 16 AWG copper wire.
Instructions for wiring the thermostat are packed in the
thermostat (field supplied) box. Make the thermostat
connections as shown in furnace wiring specifications to the
wire pigtails on the 24-volt terminal board located in the
control box.
When installing optional accessories to this appliance,
follow the manufacturer’s installation instructions included
with the accessory.
GAS CONNECTIONS
Gas piping shall be of such size and so installed as to
provide a supply of gas sufficient to meet maximum demands
without undue loss of pressure between the gas meter and
the furnace. It is recommended that the gas line to the
furnace shall be a separate line direct from the meter, unless
the existing gas line is of ample capacity. Refer to gas pipe
capacity table in the (U.S.) National Fuel Gas Code ANSI
Z223.1/NFPA54, and/or CSA B149.1 Natural Gas and
Propane Installation Codes.
If local codes allow the use of a flexible gas appliance
connector, always use a new listed connector. Do not use a
connector which has previously serviced another gas
appliance.
Use a joint compound (pipe dope) that is resistant to
the action of liquefied petroleum gases or any other chemical
constituents of the gases to be conducted through the piping.
For proper furnace operation the maximum gas
supply pressure is 14” w.c. and the minimum gas supply
pressure is 4.5” w.c. - Natural (11” w.c. - LP) as shown
on rating label.
Before any system of gas piping is finally put into service,
it should be carefully tested to determine if it is gas tight.
Check all piping for leaks using soapy water and a brush.
The piping must stand a pressure of six (6) inches of mercury
(3 PSIG) for a period of ten (10) minutes or as required by
local authority.
The unit cabinet must have an uninterrupted or unbroken
electrical ground to minimize personal injury if an
electrical fault should occur. This may consist of electrical
wire or approved conduit when installed in accordance
with existing electrical codes. Do not use gas piping as
an electrical ground. Failure to follow this warning can
result in an electrical shock, fire, bodily harm, or loss of
life.
WARNING
The furnace and its individual shutoff valve must be
disconnected from the supply piping system during any
pressure testing of that system at test pressures in
excess of 1/2 PSIG (3.5kPa or 14” w.c.).
The furnace must be isolated from the gas supply piping
system by closing its individual manual shutoff valve
during any pressure testing of the gas supply piping
system at pressures equal to or less than 1/2 PSIG
(3.5kPa or 14” w.c.). Failure to follow the above
procedures could lead to a hazardous condition and
bodily harm.
WARNING
Failure to follow the safety warnings exactly could result
in serious injury, death or property damage.
Never test for gas leaks with an open flame. Use a
commercially available soap solution made specifically
for the detection of leaks to check all connections. A fire
or explosion may result causing property damage,
personal injury or loss of life.
WARNING
FIRE OR EXPLOSION HAZARD
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Страница 5: ...506307 01 Page 5 of 36 Issue 1207 FURNACE WIRING SPECIFICATIONS...
Страница 23: ...506307 01 Page 23 of 36 Issue 1207 SEQUENCE OF OPERATION DIRECT IGNITION SYSTEM CONTROL...
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