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T7200D,E, T7300D,E,F AND Q7300 SERIES 2000 PROGRAMMABLE COMMERCIAL THERMOSTATS AND SUBBASES
7 63-4355—4
Fig. 9. Mounting subbase or wallplate.
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.
Fig. 10. Proper wiring technique.
WIRES
THROUGH WALL
WALL
WALL
ANCHORS
(2)
M10237
LEDS
MOUNTING
HOLES
MOUNTING
SCREWS
M4826
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).
Table 6. Terminal Designations and Descriptions.
Terminal Designations
Typical Connection Function
Terminal
TypeStandard Alternate
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 open
during Occupied periods and closed 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
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.