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NEC/CEC
NOTE**ALL
OTHER WIRES FACTORY
INSTALLED
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_
CIRCUIT
NO 2
ECB21- 45 0--1Y
ONLY
_
208_ _240/60/3
CIRCUIT
NO 2
LI
L2
L3
208- _240/60/3
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L3 L2
L1
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FIELD WIRING
FOR ECB21 5, 7.5, 10
AND 15 Kw THREE--PHASE
HEATERS
K3 INDOOR
BLOWER
RELAY
TRANSFORMER
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HE(l)
HE(2)
HE(3)
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GROUND
J
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TO EXTERNAL LOAD 24VAC AT .50 AMP MAXIMUM.
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NEC/CEC CLASS 2 3VA
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SEE FIGURE 7 FOR TYPICAL HEAT PUMP T'STAT
WIRING. EMERGENCY HEAT RELAY (USED ONLY IF
OUTDOOR
THERMOSTAT
tS USED)
FIELD--PRO-
VIDED AND INSTALLED NEAR INDOOR UNIT, 24VAC
5VA MAXIMUM NEC/CEC
A
THERMOSTAT
HEAT ANTICIPATION
SETTING .4 AMP
(ELECTRIC HEAT)
A
CONNECTIONS
AT TERMINALS "E" AND "X" OF THER-
MOSTAT ($1) ONLY IF EMERGENCY
HEAT RELAY IS
USED.
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USE COPPER CONDUCTORS
ONLY.
A
REFER TO JUMPER
APPLICATION TABLES IN TYPI-
CAL HEAT PUMP OR COOLING
WIRING DIAGRAMS IN
THIS INSTRUCTION.
A
FACTORY INSTALLED JUMPERS
A
OMMON TERMINAL "C" LABLED "X" ON
EARLY MODELS CCB1- -1.
FIGURE 15
Page 12
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