Manual 2100-220
Page 9
FIGURE 6
ECONOMIZER OPERATION
FOR SINGLE COMPRESSOR UNIT
WALL THERMOSTATS
FOR HEAT PUMPS WITH ECONOMIZER
Thermostat Part 8403-027 (White Rodgers IF92-71)
Electronic Heat Pump Thermostat
2 Stage Cool / 3 Stage Heat
FOR AIR CONDITIONING WITH ECONOMIZER
Thermostat Part No. 8403-021 (Honeywell T874D1934)
Subbase part no. 8404-012
(Honeywell Q674A1001)
2 Stage Cool / 2 Stage Heat
TABLE 3
(1) Low ambient control is required with economizer
for low temperature compressor operation.
)
1
(
l
e
d
o
M
r
e
z
i
m
o
n
o
c
E
r
e
n
o
i
t
i
d
n
o
C
r
i
A
c
i
s
a
B
p
m
u
P
t
a
e
H
r
o
5
-
M
F
I
E
1
2
4
L
W
/
A
W
1
8
4
L
W
/
A
W
1
0
6
L
W
/
A
W
1
2
4
H
W
1
8
4
H
W
1
0
6
H
W
MIS-1351
