Honeywell T7350 User Manual page 7

Table 5. T7350D Subbase for Three-stage Heat,
Three-stage Cool Systems.
Terminal
24 VAC Cooling transformer.
a a
RC RC
24 VAC Heating transformer.
a a
RH RH
X X Common.
aux aux Auxiliary relay.
W1 O/B Conventional: Stage 1 heating relay.
Heat Pump: Changeover relay for heating (B) or
b
cooling (O) .
W2 W1 Conventional: Stage 2 heating relay.
Heat Pump: 1st Stage auxiliary heat relay.
Y1 Y1 Conventional: Stage 1 cooling relay.
Heat Pump: Stage 1 compressor relay.
Y2 Y2 Conventional: Stage 2 cooling relay.
Heat Pump: Stage 2 compressor relay.
AS AS Discharge Air Sensor connection. (1)
AS AS Discharge Air Sensor connection. (2)
OS OS Outdoor Air Sensor connection. (1)
OS OS Outdoor Air Sensor connection. (2)
G G Fan relay.
T3 T3 T7770 Remote Sensor connection (3).
T4 T4 T7770 Remote Sensor connection (4).
T5 T5 T7770 Remote Sensor connection (5).
T6 T6 T7770 Remote Sensor connection (6).
T7 T7 T7770 Remote Sensor connection (7).
W3 W2 Conventional: Stage 3 heat or stage 4 cool relay.
Heat Pump: 2nd Stage auxiliary heat relay.
Y3 — Conventional: Stage 3 cooling relay.
HS HS Humidity Sensor connection (signal: 0-10 Vdc).
HC HC Humidity Sensor connection (common).
HP HP Humidity Sensor connection (power).
M M Motion Sensor connection (1).
M M Motion Sensor connection (2).
a
Factory jumper between RC and RH for systems with one
transformer.
b
For changeover functional details, see Operation section.
Description
T7350 COMMERCIAL PROGRAMMABLE THERMOSTAT
Table 6. T7350M Subbase for Three Stage Systems.
Terminal
a — 24 VAC Cooling transformer.
RC
— 24 VAC Heating transformer.
a
RH
X — Common.
aux — Auxiliary relay or 2nd stage of heating or cooling.
W1 — Stage 1 heating relay.
Y1 — Stage 1 cooling relay.
MX — Modulating common.
MH — Modulating heating signal (4-20 mA).
MC — Modulating cooling signal (4-20 mA).
AS — Discharge Air Sensor connection. (1)
AS — Discharge Air Sensor connection. (2)
OS — Outdoor Air Sensor connection. (1)
OS — Outdoor Air Sensor connection. (2)
G — Fan relay.
T3 — T7770 Remote Sensor connection (3).
T4 — T7770 Remote Sensor connection (4).
T5 — T7770 Remote Sensor connection (5).
T6 — T7770 Remote Sensor connection (6).
T7 — T7770 Remote Sensor connection (7).
HS — Humidity Sensor connection (signal: 0-10 Vdc).
HC — Humidity Sensor connection (common).
HP — Humidity Sensor connection (power).
M — Motion Sensor connection (1).
M — Motion Sensor connection (2).
a
Factory jumper between RC and RH for systems with one
transformer.
Mounting Thermostat on Subbase (Fig. 6)
With the subbase installed, mount the thermostat:
1. Engage the tabs at the top of the thermostat and
subbase.
2. Swing the thermostat down.
3. Press the lower edge of the case to latch.
NOTE: To remove the thermostat from the wall, first pull out
at the bottom of the thermostat; then remove the top.
7
Description
63-2605—2