30
SYSTEM OPERATION
4-1/2"
47-9/16"
7-1/2"
4-1/16 DIA.
POWER THRU
THE CURB
RETURN
19-3/8
31-3/8
LOW VOLTAGE
ENTRANCE
HIGH VOLTAGE ENTRANCE
(REMOVE PLUG)
electrical entrance and thru curb
(bottom view of unit)
Low Voltage Control Wiring
1. A 24V thermostat must be installed for unit operation.
2. Locate thermostat or remote sensor in the
conditioned space where it will sense average
temperature. Do not locate the device where it may
be directly exposed to supply air, sunlight or other
sources of heat. Follow installation instructions
packaged with the installed device.
3. Use #18 AWG wire for 24V control wiring runs not
exceeding 75 feet. Use #16 AWG wire for 24V control
wiring runs not exceeding 125 feet. Use #14 AWG
wire for 24V control wiring runs not exceeding 200
feet. Low voltage wiring may be National Electrical
Code (NEC) Class 2 where permitted by local codes.
4. Route the low voltage control wires from sub-base
terminals to the unit. Control wiring should enter
through the condenser panel opening or through
curb indicated in “Electrical Entrance” figure. Connect
thermostat and any accessory wiring to low voltage
terminal block TB1 in the main control box.
5. For two-stage heating operation, remove the factory
installed jumper connecting W1 and W2 terminals on
terminal block.
NOTE: Field-supplied conduit may need to be installed
depending on unit/curb configuration. Use #18 AWG solid
conductor wire whenever connecting thermostat wires
to terminals on sub-base. DO NOT use larger than #18
AWG wire. A transition to #18 AWG wire may be required
before entering thermostat sub-base.
NOTE: Refer to unit wiring diagrams for thermostat or
remote sensor connections.
GAS SUPPLY PIPING
WARNING
To prevent personal injury or death due to improper
installation, adjustment, alteration, service or
maintenance, refer to this manual. For additional
assistance or information, consult a qualified installer,
servicer agency or the gas supplier.
IMPORTANT NOTE: This unit is factory set to operate on
natural gas at the altitudes shown on the rating plate.
WARNING
To avoid property damage, personal injury or death
when either using propane gas alone or at higher
altitudes, obtain and install the proper conversion kit(s).
Failure to do so can result in unsatisfactory operation
and/or equipment damage. High altitude kits are for
U.S. installations only and are not approved for use in
Canada.
The rating plate is stamped with the model number, type
of gas and gas input rating. Make sure the unit is equipped
to operate on the type of gas available. Conversion to
propane (LP) gas is permitted with the use of the factory
authorized conversion kit (see the unit Technical Manual
for the appropriate kit). For High Altitude derates, refer to
the latest edition of the National Fuel Gas Code NFPA 54/
ANSI Z223.1 or National Standard of Canada, Natural Gas
and Propane Installation Code, CSA B149.1.
NATURAL
Min. 5.0" W.C., Max. 10.0" W.C.
PROPANE
Min. 11.0" W.C., Max. 14.0" W.C.
INLET GAS PRESSURE
inlet gas pressure must not exceed maximum value
shown in table above.
Содержание DRG0361DL00001S
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