21
3-90-233R24_11/13
N
L
R C
W1 G
R
W1 G
C
set 3° below new t'stat
set 3° above existing t'stat
24 V
A
C
com.
24 V
A
C
hot
H
ea
t C
on
tr
ol
Fan C
on
tr
ol
Existing T'stat
Wiring
( by installer )
3
4
1
6
5
7
8
R2 RELAY
LOW VOLTAGE 24 VAC COIL
LOW VOLTAGE
LOW VOLTAGE
R1 RELAY
4
1
3
6
5
8
7
in control cover
Through grommet
HIGH VOLTAGE ( L1 )
HIGH VOLTAGE ( N )
HIGH VOLTAGE ( ORANGE) from control board
SPLICE
SPLICE
The top two screws only
on the 5 pole terminal strip
O/A sensor terminals
EXISTING BL
O
WER C
ONTR
OLS
to cir
cula
tor outlet
New T'stat Wire
New T'stat Wire
( by installer )
( by installer )
fac
tor
y wir
ing
fac
tor
y wir
ing
( by installer )
( by installer )
( by installer )
Existing T'stat
New T'stat
( by installer )
Grainger#2XC01-
Omron LY2F 24V
Grainger#2XC02-
Omron LY2F 120V
Installation with A hot Air System - fan only capable