Bryant GAS-FIRED 454 - Manual

Installation Instructions
GAS-FIRED AIR CONDITIONER
Installation of the Model 454 Gas Air Con­
ditioning unit consists of the following steps:
I. Locating and Mounting the Unit
II. Connecting Chilled Water Lines
III. Making Electrical Connections
IV . Making Gas Connections
V . Charging Systena with Water
VI. Checking the Unit Operation
VII. Adjusting Gas Input
VIII. Balancing the System
DC . Freezing Weather Protection
Each of the above steps is discussed in detail
in this instruction. Read the entire instruc -
tion before starting the installation.
Multiple Chillers and Cooling Coils
When it is planned to connect two or more
chillers or coils, additional piping and
electrical information is required and should
be obtained from your Bryant Distributor.
When making multiple chiller installations, it
is recommended that only 454 chillers be
interconnected. The use of other model chil­
lers with the
4 5 4
in a multiple system should
be avoided.
Operation at Atmospheric Pressure
The chilled water tank on this unit is vented
to the atmosphere; consequently, the chilled
water circuit operates at or near atmospheric
pressure.
Therefore, conventional piping practices for
a closed, pressurized system do not apply
for this unit.
NOTE: When the water chiller is piped to a
boiler as described below, the indoor coil
operates at or near atmospheric pressure
when used for cooling; it may be pressurized
when it is used with the boiler for heating.
SIZE 36
SERIES W
454
bri|ant
I
39454D1
4/25/69
■■1
Figure 1 - Model 454 Gas Air Conditioner
When this chiller is piped with a boiler to
form a combination heating and cooling sys -
tern, provisions must be made for a positive
shut-off between the chiller tank and the
boiler.
When the boiler is in operation, the chiller
tank must be by-passed. A sedime:
must be installed
when a common pipe (|oni
and boiler.
When the chiller is i:
of course, should be b;
LOCATING AND M
The unit is designed for outdoor installation.
It may be located at ground level or on a
roof. Consult local or other applicable codes
for information concerning proximity to
property lines, height above roof, obstruc­
tions, etc.
DO HOT