Honeywell TB7220 COMMERCIALPRO Product Data page 6

TB7220 COMMERCIALPRO™ PROGRAMMABLE THERMOSTAT
WIRE
WALL OPENING
SHADED AREA
Fig. 11. Restrict wires to shaded area of wire hole.
Table 4. Wiring Diagrams.
Wallplate Terminal
System Type Identifications
Standard Heat/Cool Conventional
Heat Only Conventional
Cool only Conventional
Standard Multistage Conventional
up to 2 Heat/2 Cool
Heat Pump Heat Pump
(No Auxiliary Heat)
Heat Pump Heat Pump
(with Auxiliary Heat)
Multiple T7770A —
Sensors
Multiple C7189U —
Sensors
63-2635—03
WALLPLATE
Rc
(see Note 1)
R
(see Note 1)
Y
C
(see Note 2)
W
G
W2
Y2
O/B
M22266
(see Note 3)
A
(see Note 4)
S1
(See Note 5)
Wiring Diagram
S2
Figure
(See Note 5)
12, 13
14
NOTES:
15
16, 17
18, 19
20, 21
26, 27, 28
29
Terminal "A" Wiring Details for Economizers
— Wire the A terminal to the W7212 "N" terminal, or the
— When using dual transformers at the thermostat, the cooling
— The A signal is powered from the R terminal and energizes
6
Table 5. Terminal Designation Descriptions.
Terminal
Designation
Power for cooling—connect to secondary side
of cooling system transformer.
Power for heating—connect to secondary side
of heating system transformer.
Compressor output.
Common wire from secondary side of cooling
system transformer.
Heat relay.
Fan relay.
Second stage heat relay.
Second stage cooling.
Changeover valve for heat pumps.
Economizer/Time-Of-Day (TOD) output—
powered via R terminal.
Optional outdoor or indoor remote sensor.
Optional outdoor or indoor remote sensor.
1. When used in a single-transformer system, leave
metal jumper wire in place between Rc and R. If
used on a two-transformer system, remove metal
jumper wire between Rc and R.
2. Common wire is optional when thermostat is used
with batteries. When using separate transformers
for heating and cooling, the common must come
from the cooling transformer.
3. If thermostat is configured for a heat pump in the
Installer Setup, configure changeover valve for
cool (O-factory setting) or heat (B).
4. Reference economizer literature for wiring details.
When set for economizer operation, the A terminal
provides the occupancy signal. (Power indicates
occupied.)
5. Sensor wires must have a cable separate from the
thermostat control cable.
W7459 "TR" terminal.
transformer must power the economizer.
the economizer to signal occupied status and drive the
damper to the set minimum position.
Description