Honeywell Q7300L User Manual

Q7300L

Series 2000 Commercial

Thermostat Subbases

INSTALLATION INSTRUCTIONS

APPLICATION

The Q7300L Thermostat Subbase is used with the T7300D,F Thermostat to provide electronic control of commercial 24 Vac single zone HVAC equipment. The T7300/Q7300L is designed for heat-cool applications using a valve and valve actuator combination for hydronic heating. See Table 1. It can also be used to control singlestage conventional heating systems. It provides two-speed fan control. Terminals are provided for the T7047 Remote Sensor or the T7147 Remote Sensor and Override Module. LEDs on the thermostat are prewired and labeled to indicate heat and cool operation. See Fig. 9 and 10 for hookup drawings. Refer to form 63-4355 for installation and operation of the T7300/Q7300.

Table 1. Valve and Valve Actuator Combinations.

Valve Model Valve Actuator Model

V5011A, C ML7984A3019 V5011F, G ML7984A3001 V5013A, C ML7984A3019

V5013F ML7984A3001

IMPORTANT

The valve will not close if the wrong valve and valve actuator combination is used.

Electrical Rating:

20 to 30 Vac, 50/60 Hz.

System Current :

6 VA maximum at 30 Vac, 50 or 60 Hz.

Output Relay Current:

See Table 2.

Table 2. Maximum Amps at 30 Vac.

Relay Running (A) Inrush (A)

Fan 1.6 3.5 Heat 1.6 3.5 Cool 1.6 7.5

Auxillary (Economizer) 1.6 3.5

Temperature:

Ratings:

Operating Ambient: 40°F to 110°F (4°C to 43°C). Shipping: -30°F to +150°F (-34°C to +65°C).

Display Accuracy:

+1°F (+0.5°C).

Setpoint:

Range: 45°F to 95°F (7°C to 35°C). Differential: 2°F (1°C).

Humidity Ratings:

5% to 90% RH, noncondensing.

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.

X-XX UL

62-0131-2

Q7300L SERIES 2000 COMMERCIAL THERMOSTAT SUBBASE

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

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.

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.

YES

5 FEET

(1.5 METERS)

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

M4823A

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

T7047GT7047G

Fig. 2. Two T7047G Sensors providing

temperature averaging network for T7300/Q7300 Thermostat/Subbase.

M4838

62-0131—2

Q7300L SERIES 2000 COMMERCIAL THERMOSTAT SUBBASE

SUBBASE

T7047C

T7047G

T7047C

Fig. 3. Two T7047C Sensors and one T7047G Sensor providing temperature averaging network for T7300/

Q7300 Thermostat/Subbase.

T7047C

Fig. 4. Four T7047C Sensors providing

temperature averaging network for T7300/Q7300 Thermostat/Subbase.

SUBBASE

T7047G

M4839

SUBBASE

T7047C

M4840

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.

1. Position and level the subbase or wallplate (for appearance only). The thermostat functions properly even when not level.

2. Use a pencil to mark the mounting holes. See Fig. 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 over the holes, pulling wires through the wiring opening.

5. Loosely insert the mounting screws into the holes.

6. Tighten mounting screws.

T7047C

WIRES THROUGH WALL

T7047C

M4842

WALL

T7047G

Fig. 5. Five T7047G Sensors providing

temperature averaging network for T7300/Q7300 Thermostat/Subbase.

T7047G

WALL ANCHORS (2)

MOUNTING HOLES

M4841

LEDS

MOUNTING SCREWS

M10237

Fig. 7. Mounting the subbase.

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