T7200D,E, T7300D,E,F AND Q7300 SERIES 2000 PROGRAMMABLE COMMERCIAL THERMOSTATS AND SUBBASES
63-4355—1
7
3. Remove the subbase or wallplate from the wall and drill
two 3/16 inch holes in the wall (if drywall) as marked.
For firmer material such as plaster or wood, drill two
7/32 inch holes. Gently tap anchors (provided) into the
drilled holes until flush with the wall.
4. Position the subbase or wallplate over the holes, pulling
wires through the wiring opening.
5. Loosely insert the mounting screws into the holes.
6. Tighten mounting screws.
WIRES
THROUGH WALL
WALL
WALL
ANCHORS
(2)
M10237
LEDS
MOUNTING
HOLES
MOUNTING
SCREWS
Fig. 8. Mounting subbase or wallplate.
a
Some OEM models reverse the economizer terminal designations A1 and A2.
b
Some OEM models label the terminal for transformer common B.
(Continued)
WIRING SUBBASE OR WALLPLATE
All wiring must comply with local electrical codes and
ordinances. Follow equipment manufacturer wiring
instructions when available. Refer to Fig. 19 through 32 for
typical hookups. A letter code is located near each terminal
for identification. Refer to Table 6 for terminal designations.
CAUTION
Disconnect power before wiring to prevent electrical
shock or equipment damage.
Table 6. Terminal Designations and Descriptions.
Standard
Terminal
Designations
Alternate
Terminal
Designations
Typical Connection
Function
Terminal
Type
A1
A2
a
Dry auxiliary contacts for economizer control; A1 is
normally open during Unoccupied periods and closed
during Occupied periods.
Output
Dry contact
A1, A2
—
Damper control relay (Q7300L only)
Input, Output
24V powered
contact
A2
A1
a
Dry auxiliary contacts for economizer control (A2 is
common)
Input
Dry contact
A3
—
Dry auxiliary contacts for economizer control; A3 is
normally closed during Occupied periods and open during
Unoccupied periods.
Output
Dry contact
AS, AS
—
C7150B Discharge Air Sensor connection
Input
—
B
—
Heating changeover valve
Output
24V powered
contact
C1, C2, C3,
C4, C5
—
Communication input for T7147
Input
Low power
E
K
Emergency heat relay
Output
24V powered
contact
G
F
Fan relay
Output
24V powered
contact
O
R
Cooling changeover valve
Output
24V powered
contact
R
V
24V system transformer
Input
—
RC
—
24V cooling transformer
Input
—
RH
—
24V heating transformer
Input
—
T, T
—
Remote sensor input for T7047 or T7147
Input
—
W1
H1, R3
Stage 1 heating relay (Q7300A, G) or auxiliary heat relay
(Q7300C, D)
Output
24V powered
contact
