Bryant SERIES D 453 - Manual (Page 10)

manifold pressure of 11.0 wc. Connect manometer to
1/8-inch pressure tap on the gas valve and adjust
regulator at the supply tank to provide a manifold
pressure of 11.0 inches wc.
CAUTION: The unit may be run for short periods with
panels removed. Prolonged operation with panels
removed should not be attempted.
VII. BALANCING THE SYSTEM
After the unit is in operation and the input has been
measured to agree with the rating plate requirements,
the system must be balanced.
Any approved method of checking the air flow over
the water coil may be utilized. Refer to Model 453
service instructions for a review of standard methods.
LEGEND
1A Transformer
2G Power Relay
(Heat Motor)
2J Lockout Relay
(Circuit Breaker)
3A Pump Motor
3C Fan Motor (PSC)
5A Gas Valve (Heat Motor)
6B Pilot (Reignition)*
7D Sail Switch
7H Hi-Temp Limit Control
7L Part Load Control
7P Pressure Switch
(Pilot Gas)
11A Resistor
*Or thermocouple Pilot & Pilot Relay
(Reignition).
230-60-1
Figure 9 - Model 48-453 Chiller Wiring Diagram
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