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grounded during installation. Check ground lug connection
range as indicated in Appendix B Electrical Data.
System Voltage - That nominal voltage value assigned to
a circuit or system for the purpose of designating its voltage
class.
Nameplate Voltage - That voltage assigned to a piece of
equipment for the purpose of designating its voltage class
Utilization Voltage - The voltage of the line terminals
Three Phase Models Only
HOW TO USE THE FORMULA:
EXAMPLE: Line to neutral voltage of 220, 216, and 213
) Average Voltage = 220 + 216 + 213 = 649 / 3 = 216
Maximum Voltage Deviations from Average Voltage = 220 - 216 = 4
Percent voltage unbalance MUST NOT exceed 2%.
3) Percent Voltage Unbalance = 100 x = = 1.8%
4
216
400
216
) PERCENT VOLTAGE
UNBALANCE
2) MAXIMUM VOLTAGE DEVIATIONS
FROM AVERAGE VOLTAGE
1) AVERAGE VOLTAGE
=
100 x
AIR FLOW ADJUSTMENTS
load current rating of the motor. The amperage must not
exceed the service factor stamped on the motor nameplate.
operation of the furnace.
If an economizer is installed, check the unit operating
minimum outside air.
TON, EVAPORATOR FREEZING OR POOR UNIT
PERFORMANCE IS POSSIBLE.
ID MOTOR TAPS T1 T2 T3 T4 T5
FAN (BK) X* - - - -
COOLING STG 1 (YL) X* X X X X
COOLING STG 2 (PU) - X X X* X
HEATING STG 1 (WH) - X* X X X
HEATING STG 2 (BR) - - X* X X
ALLOWABLE SPEED TAPS 3-6 TON STD STATIC GAS
Data Plate.
and verify that motor nameplate amps are not exceeded. A
factory locations.
EVEN IF THE USER SELECTS LOW STAGE HEATING
ON THERMOSTAT, THIS OPERATION WILL NOT BE
AVAILABLE.
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