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FIELD WIRING FOR ECB21 25 OR 30 KW SINGLE--PHASE
HEATERS
FIELD
INSTALLED
------
CLASS 2 VOLTAGE
FIELD
INSTALLED
NEC/CEC
NOTE--ALL
OTHER
WIRES FACTORYtNSTALLED
CIRCUIT
NO
L1 L2
K3 INDOOR BLOWER
TRANSFORMER
O
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K33 HEAT RELAY
K35 HEAT RELAY
J2
P2 K32 HEAT RELAY
U
Kl16 HEAT RELAY
R6
RESISTOR
HE(
HE(_ _HE(8 HE(z qE(5 HE(6
O©©OO©
GROUND
_T
TO EXTERNAL LOAD 24VAC AT .50 AMP MAXIMUM.
,/_
NEC/CEC CLASS 2 3VA
SEE FIGURE 7 FOR TYPICAL HEAT PUMP T'STAT WIRING. /_
EMERGENCY
HEAT RELAY (USED
ONLY IF OUTDOORL&.X
USE COPPERCONDUCTORS
ONLY.
THERMOSTATIS
USED) FIELD- -PROVIDED AND INSTALLED
A
NEAR
INDOOR
UNIT. 24VAC
5VA MAXIMUM
NEC/CEC/8
_ WHEN OUTDOOR THERMOSTAT
IS USED, CONNECT LEADS
CLASS 2.
TO TERMINALS
"R" AND "W3" AND REMOVE JUMPER BE*
A
//_
TWEEN "R" AND "W3".
THERMOSTAT
HEAT
ANTICIPATION
SETTING
.4 AMP
REFER TO JUMPER
APPLICATION TABLES IN TYPICAL
HEAT
(ELECTRIC HEAT)
PUMP OR COOLING
WIRING DIAGRAMS IN THIS INSTRUCTION.
CONNECTIONS
AT TERMINALS
"E" AND "X" OF THERMO-/_
STAT ($1) ONLY IF EMERGENCY
HEAT RELAY IS USED.
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FACTORY INSTALLED JUMPERS
A
WHEN TWO* -STAGE T'STAT IS USED, CONNECT SECOND- A
COMMON TERMINAL "C" LABLED "X" ON EARLY MODELS
STAGE HEAT BULB TO TERMINAL
"W2." REMOVE JUMPEI_,..LL& CCBI* -1.
BETWEEN TERMINALS "R" AND "W2."
FIGURE 14
Page 11
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