Wiring Subbase/Wallplate - Honeywell T7200D Product Data

T7200D,E, T7300D,E,F AND Q7300 SERIES 2000 PROGRAMMABLE COMMERCIAL THERMOSTATS AND SUBBASES
WIRES
THROUGH WALL
WALL
ANCHORS
(2)
LEDS
Fig. 9. Mounting subbase or wallplate.
Terminal Designations
Standard Alternate
A1 a
A2
A1, A2 —
A2 a
A1
A3 —
AS, AS —
B —
C1, C2, C3, —
C4, C5
E K
a
Some OEM models reverse the economizer terminal designations A1 and A2.
b
Some OEM models label the terminal for transformer common B.
c
Applies only to Q7300H2037.
WALL
MOUNTING
HOLES
MOUNTING
SCREWS
M10237
Table 6. Terminal Designations and Descriptions.
Typical Connection
Dry auxiliary contacts for economizer control; A1 is normally open
during Unoccupied periods and closed during Occupied periods.
Damper control relay (Q7300L only).
Dry auxiliary contacts for economizer control (A2 is common).
Dry auxiliary contacts for economizer control; A3 is normally open
during Occupied periods and closed during Unoccupied periods.
C7150B Discharge Air Sensor connection.
Heating changeover valve.
Communication input for T7147.
Emergency heat relay.

WIRING SUBBASE/WALLPLATE

IMPORTANT
All wiring must comply with local electrical codes
and ordinances.
Follow equipment manufacturer wiring instructions when
available. Refer to the Wiring section for typical hookups.
A letter code is located near each terminal for identification.
Refer to Table 6 for terminal designations.
CAUTION
Electrical Shock Hazard.
Power supply can cause electrical shock.
Disconnect power before beginning installation.
1. Loosen the terminal screws on the subbase/wallplate
and connect the system wires. See Fig. 10.
IMPORTANT
Use 18-gauge, solid-conductor color-coded
thermostat cable for proper wiring. If using 18- gauge
stranded wire, no more than ten wires can be used.
Do not use larger than 18-gauge wire.
2. Securely tighten each terminal screw.
3. Push excess wire back into the hole.
4. Plug the hole with nonflammable insulation to prevent
drafts from affecting the thermostat.
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
Fig. 10. Proper wiring technique.
7
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).
M4826
Terminal
Function Type
Output Dry contact
Input, Output 24V powered
contact
Input Dry contact
Output Dry contact
Input —
Output 24V powered
contact
Input Low power
Output 24V powered
contact
63-4355—4