Bryant 48-453 B Installation Instructions Manual

Installation Instructions
GAS-FIRED AIR CONDITIONER
Important - Read Before Installing
453
Size 48, Series B
brqant
I
39453D59 Rev 1
10/20/70
1. Check all local or other applicable codes
for information concerning proximity to
property lines, height above roof, ob¬
structions, etc.
2. Be sure the power supply available (voltage,
frequency, and phase) corresponds to that
specified on the unit (230-60-1).
3. Check the electrical service provided by
the utility for the building to be sure that the
service capacity is sufficient to handle the
load imposed by this unit.
4. 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 installation is to be made.
5. Refer to the dimensional drawing on page 2
for location of electrical, gas and chilled
water connections prior to setting the unit in
place.
GENERAL
Model 48-453, Series B, is a gas fired air¬
cooled absorption system which supplies
chilled water to the cooling coil and is suit¬
able for residential and small commercial
air conditioning systems.
This unit is used for cooling only with indoor
or outdoor coil assemblies. The 48-453,
Series B can also be used in conjunction with
a Bryant gas-fired furnace to provide "all-
seasons" air conditioning for warm air or
cool air as outside temperature dictates.
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.
Figure 1 - Model 453 Gas Air Conditioner
When making multiple chiller installations,
only 453, Series A and Series B can be inter¬
connected.
Do not manifold 453, Series A or Series B
chillers with 36-453, Series C chillers.
Operation at Atmospheric Pressure
The chilled water tank on this unit is vented
to the atmosphere; consequently, the chilled
water circuit operates at atmospheric pres¬
sure .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.
When the chiller is piped with a boiler to
form a combination heating and cooling