Honeywell 2000 User Manual

Q7300A,C,D,G Series 2000

Commercial Thermostat Subbases

INSTALLATION INSTRUCTIONS

APPLICATION

The Q7300 Thermostat Subbases are used with T7300 Thermostats to provide electronic control of commercial

Table 1. Description of Q7300 Subbases.

Model Applications Thermostat Required Heat Cool Hookup Drawing

Q7300A Conventional T7300D, F 2 2 9-12 Q7300C Heat Pump T7300E, F 3 2 13-15 Q7300D Heat Pump T7300E, F 3 2 16 Q7300G Conventional T7300D, F 3 3 17

Depends on model.

RECYCLING NOTICE

If this control is replacing a control that contains mercury in a sealed tube, do n control in the trash

Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old thermostat.

place your old

INSTALLATION

When Installing this Product…

1. Read these instructions carefully. Failure to follow the instructions can damage the product or cause a hazardous condition.

2. Check the ratings given in the instructions and on the product to make sure the product is suitable for your application.

3. Installer must be a trained, experienced service technician.

4. After completing installation, use these instructions to check out the product operation.

24 Vac single or multistage heat pump or conventional heating and cooling systems. Select models have terminals for LEDs and remote temperature sensors. Refer to Table 1. All Q7300 Thermostat Subbases require a common wire to the supply power.

Maximum Stages

Location

Subbase without Remote-Mounted Temperature Sensor

Install the thermostat about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 1.

Do not install the thermostat where it can be affected by: — drafts, or dead spots behind doors and in corners. — hot or cold air from ducts. — radiant heat from sun or appliances. — concealed pipes and chimneys. — unheated (uncooled) areas such as an outside wall

behind the thermostat.

Subbase with Remote-Mounted Temperature Sensor(s)

If only the remote-mounted temperature sensor(s) is used to sense and control room temperature, then install the thermostat in an area that is accessible for setting and adjusting the temperature and settings.

If both the subbase and remote-mounted temperature sensor(s) are used to sense and control room temperature, then install the subbase about 5 ft above the floor in an area with good air circulation.

X-XX UL

62-0135

Q7300A,C,D,G SERIES 2000 COMMERCIAL THERMOSTAT SUBBASES

Fig. 1. Typical location of thermostat or remote-mounted sensor.

Install the remote-mounted sensor(s) about 5 ft (1.5m) above the floor in an area with good air circulation at average temperature. See Fig. 1.

Do not mount the sensor(s) where it can be affected by: — drafts, or dead spots behind doors and in corners. — hot or cold air from ducts. — radiant heat from sun or appliances. — concealed pipes and chimneys. — unheated (uncooled) areas such as an outside wall

behind the thermostat.

If more than one remote sensor are required, they must be

arranged in a temperature averaging network consisting of two, three, four, five or nine sensors. See Fig. 2 through 6.

IMPORTANT

To avoid electrical interference, which can cause erratic performance, keep wiring runs as short as possible and do not run thermostat wires adjacent to the line voltage electrical distribution systems. Use shielded cable (Belden type 8762 or equivalent for 2-wire and Belden type 8772 or equivalent for 3-wire). The cable shield must be grounded only at the controlled equipment case.

SUBBASE

YES

5 FEET

(1.5 METERS)

Fig. 3. Two T7047C Sensors and one T7047G Sensor

providing temperature averaging network for

M4823A

SUBBASE

T7047C

T7047G

T7047C

M4839

T7300/Q7300 Thermostat/Subbase.

SUBBASE

T7047C

Fig. 2. Two T7047G Sensors providing

temperature averaging network for T7300/Q7300 Thermostat/Subbase.

62-0135

T7047GT7047G

M4838

T7047C

Fig. 4. Four T7047C Sensors providing

temperature averaging network for T7300/Q7300 Thermostat/Subbase.

T7047C

M4840

T7047G

SUBBASE

T7047G

Q7300A,C,D,G SERIES 2000 COMMERCIAL THERMOSTAT SUBBASES

WALL

WIRES THROUGH WALL

T7047G

WALL ANCHORS

(2)

T7047C

SUBBASE

T7047C

M4841

M4842

Fig. 5. Five T7047G Sensors providing

temperature averaging network for T7300/Q7300 Thermostat/Subbase.

T7047C

Fig. 6. Nine T7047C Sensors providing

temperature averaging network for T7300/Q7300 Thermostat/Subbase.

Mounting Subbase

The subbase mounts horizontally on the wall or a 2 in. x 4 in. wiring box. Position the subbase horizontally on the wall or on a 2 in. x 4 in. wiring box.

쐃 Position and level the subbase or wallplate (for

appearance only). The thermostat functions properly even when not level.

쐇 Use a pencil to mark the mounting holes. See Fig. 7. 쐋 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.

쐏 Position the subbase over the holes, pulling wires

through the wiring opening.

쐄 Loosely insert the mounting screws into the holes. 쐂 Tighten mounting screws.

MOUNTING HOLES

MOUNTING SCREWS

LEDS

M10237

Fig. 7. Mounting the subbase.

WIRING SUBBASE

All wiring must comply with local electrical codes and ordinances. Follow equipment manufacturer wiring instructions when available. Refer to Fig. 9 through 17 for typical hookups. A letter code is located near each terminal for identification.

CAUTION

Disconnect power before wiring to prevent electrical shock or equipment damage.

쐃 Loosen the terminal screws on the subbase and

connect the system wires. See Fig. 8.

IMPORTANT

Use 18-gauge, solid-conductor color-coded thermostat cable for proper wiring. If using 18gauge stranded wire, no more than ten wires can be used. Do not use larger than 18-gauge wire.

쐇 Securely tighten each terminal screw. 쐋 Push excess wire back into the hole. 쐏 Plug the hole with nonflammable insulation to

prevent drafts from affecting the thermostat.

FOR STRAIGHT

FOR WRAPAROUND INSERTION STRIP 7/16 IN. (11 MM).

Fig. 8. Proper wiring technique.

INSERTION STRIP 5/16 IN. (8 MM).

M4826

62-0135

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