Manual 2100-516H
Page
3 of 19
TABLE 1
DIAGRAM TO USE WITH UNIT AND VENTS
System
Vent
None
CRV, ERV, MFAD
CRVMWH-3
CHCRV-5
EIFM
Economizer
ECONWM*
CS2000A*
Vent Code
X
R, M, V, P
C
E
T, W, S
Thermostat Programmable Programmable Programmable Programmable Programmable
All
Model Series
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
Heat Pump
S**H
T**H
W**H
1
1
3 & 4
2
15
14
N/A
5
N/A
13
11
Heat Pump with
Dehumidification
S**H*D
T**H*D
W**H*D
7
6
9 & 10
8
N/A
14
N/A
12
N/A
13
N/A
NOTE: The voltage should be measured at the field power
connection point in the unit and while the unit
is operating at full load (maximum amperage
operating condition).
WIRING – LOW VOLTAGE WIRING
230/208V, 1 phase and 3 phase equipment dual primary
voltage transformers. All equipment leaves the factory
wired on 240V tap. For 208V operation, reconnect
from 240V to 208V tap. The acceptable operating
voltage range for the 240V and 208V taps are:
TABLE 3
WALL THERMOSTAT
TABLE 2
OPERATING VOLTAGE RANGE
An 18 gauge copper, color-coded thermostat cable is
recommended. The connection points are shown in this
Manual. See Table above.
Low Voltage Connection
These units use a grounded 24-volt AC low voltage
circuit.
The “
R
” terminal is the
hot
terminal and the “
C
”
terminal is
grounded
.
“
G
” terminal is the
fan input
.
“
Y
” terminal is the
compressor input
.
“
B
” terminal is the
reversing valve input
. The reversing
valve must be energized for heating mode.
“
R
” terminal is the
24 VAC hot
.
“
C
” terminal is the
24 VAC grounded
.
LOW VOLTAGE CONNECTIONS
FOR DDC CONTROL
Fan Only
Energize G
Cooling Mode
Energize Y, G
Heat Pump Heating
Energize Y, G, B
2nd Stage Heating
Energize G, W2, Y, B
w/Heat Pump (if employed)
Ventilation
Energize G, O1
Emergency Heat
Energize B, W2, E, G
Dehumidification
Energize W3
“
L
” terminal is
compressor lockout output
. This
terminal is activated on a high or low pressure trip by the
electronic heat pump control. This is a 24 VAC output.
“
W2
” terminal is
second stage heat
(if equipped).
“
O1
” terminal is the
ventilation input
. This terminal
energizes any factory installed ventilation option.
“
E
” terminal is the
emergency heat input
. This terminal
energizes the emergency heat relay.
“
W3
” terminal is the
dehumidification input
. This
terminal energizes compressor, blower and three-way
valve.
TAP
RANGE
240V
253 – 216
208V
220 – 187
Part Number
Predominate Features
8403-058
(TH5220D1151)
2 stage Cool, 2 stage Heat - Conventional
1 stage Cool, 2 stage Heat - Heat Pump
Electronic Non-Programmable
Auto or Manual changeover
8403-060
(1120-445)
3 stage Cool; 3 stage Heat
Programmable/Non-Programmable Electronic
HP or Conventional
Auto or Manual changeover
Dehumidification Output
