Typical Field Wiring - York 20 Series Installation Manual

Gas/electric single package air conditioners
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349215-JIM-B-1008
T H E R M O S T A T
1
T E R M I N A L S
R C
R H
Y 1
Y 2
W 1
W 2
G
C
X 1
X 3
X 4
A 1
A 2
T
T
T O R E M O T E S E N S O R
2 E T 0 4 7 0 1 3 2 4 IF U S E D
E l e c t r o n i c p r o g r a m m a b l e T h e r m o s t a t 2 E T 0 7 7 0 0 1 0 0 2 4 ( i n c l u d e s s u b b a s e ) .
1
T e r m i n a l s A 1 a n d A 2 p r o v i d e a r e l a y o u t p u t to c l o s e th e o u t d o o r
2
e c o n o m i z e r d a m p e r s w h e n th e th e r m o s t a t s w i t c h e s to th e s e t - b a c k p o s i t i o n .
FIGURE 5 - TYPICAL FIELD WIRING
12
UNIT CONTROL
BOARD
R
Y 1
Y 2
W 1
W 2
G
C
2 4 V o l t
T r a n s f o r m e r
X
2
O C C
T-STAT
W1
W2
Y1
G
Y2
C
RH
RC
208/230-3-60 and 380/415-3-50 units control
transformers are factory wired for 230v and 415v
power supply respectively. Change tap on
transformer for 208-3-60 or 380-3-50 operation.
See unit wiring diagram.
W1
W2
Y1
G
OCC
UNIT CONTROL
BOARD
Y2
X
R
SD
C
ERMINAL BLOCK B1
GROUND
LUG
FAC ORY OR FIELD
SUPPLIED DISCONNEC
Johnson Controls Unitary Products
HREE
PHASE
POWER
SUPPLY

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