Bryant GAS-FIRED 454 - Manual (Page 5)

heated space (space not subject to freezing),
The following Table HE shows the minimum
lengths (total inlet and outlet) of polyethylene
piping of various diameters that are required
to provide adequate expansion volume.
TABLE III
Nominal Pipe Size
Inches
Length of Polyethylene
Pipe in Feet
Size 36
3/4 24
1 15
If the total polyethylene chilled water line
footage in the heated space is not as long as
the minimum values shown in the table, tee a
vertical pipe of sufficient volume into either
of the coil connections to provide for expan­
sion, or drain the lines during freezing,
weather, (see GAC -YAC #1 -100 pages).
Note: No minimum run required when using
Bryant quick connect plastic hose.
III. MAKING ELECTRICAL CONNECTIONS
1. Make all electrical connections in accord­
ance with the National Electrical Code and
any local ordinances or codes that might
apply.
2 . Provide a separate power supply for the
air conditioner.
3. Provide a fused disconnect switch within
sight of and not more than 50 feet from the
unit. A 30 amp standard fuse or a 15 amp
Fusetron is suggested.
Use minimum wire of #14 copper wire or #12
aluminum wire. The 115V power supply con­
nects into the control box located inside the
service panel on the right side of the unit.
The conduit enters through a knockout located
in the rear of the unit and attaches to the
opening in the bottom of the control box. The
low voltage (24V) wires from the thermostat
control are connected to the low voltage
terminal block in the control box.
Low Voltage Power Supply
Transformer - The air conditioner is not
equipped with a transformer. However, when
a Bryant furnace is used as the air handler
the furnace transformer may be utilized as
the power supply for the low voltage control
circuit in the 454 .
If other than a Bryant furnace is used, you
must use Bryant part number:
64805D01 115 volt 24 V
The transformer listed is available as an
accessory.
Length of Low Voltage Wire - If the length
of the wire run between the transformer and
the R terminal on the air conditioner exceeds
70 feet it will be necessary to remove the
resistor from the low voltage circuit of the
air conditioner as follows:
1. Remove the wire running from the resis­
tor to "R" on the 454 terminal block.
2. Disconnect the pilot wire at the resistor
and connect this wire to "R" on the terminal
block.
IV. MAKING GAS CONNECTIONS
The following recommendations apply to the
installation, tests and operation of appliances
and piping systems for natural and propane
gases:
1. Before making any gas connebtions, refer
to the regulations of the serving gas supplier
and the local building, heating, plumbing or
other codes in effect in the area in which the
installation is made.
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