Hunter 43004, 43005 Owner's Manual

SERVICE INSTRUCTIONS

CALIBRATION

Bimetal

7/32” Calibration wrench

FIGURE 6 CALIBRATING THERMOSTAT

The thermostat is accurately calibrated before leaving the factory and no further calibration should be necessary. If the thermostat appears to be out of calibration or for any reason fails to function properly, a qualified serviceperson should proceed as follows:

1. The anticipator’s heat may adversely affect thermostat recalibration. To prevent this, disconnect electrical power power to the thermostat at the furnace, main fuse, or breaker box.

Arrow points to the

matched current rating

of the primary control.

1.2

FIGURE 7 ANTICIPATOR ADJUSTMENT

.15

Climate Technology Corp. 2500 Frisco Avenue Memphis, TN 38114 A Hunter Fan Company

1-800-676-7861

Temperature

adjustment

lever

HEAT ANTICIPATION ADJUSTMENT

.25

Move this lever

to adjust heat

anticipator.

2. Move temperature adjustment lever to a setting about 5° above room temperature.

3. Remove thermostat cover. Slip 7/32" wrench onto hex nut beneath bimetal. While holding temperature adjustment lever stationary, turn hex nut clockwise until mercury shifts to the right end of the tube (fig. 7).

4. Move temperature adjustment lever to lowest setting.

5. Replace thermostat cover. Wait 10 min. for bimetal temperature to stabilize. Do not stand near the thermostat during this period, as your breath and body heat will affect bimetal temperature.

6. Move temperature adjustment lever to correspond to actual room temperature. Then remove thermostat cover.

7. Slip 7/32" wrench onto hex nut. While holding temperature adjustment lever stationary, turn hex nut counter-clockwise until mercury just barely shifts to the left end of the tube.

8. Replace thermostat cover and set temperature adjustment lever to desired temperature. Turn on electrical power to system.

Some heating installations require longer or shorter “ON”, “OFF” periods to maintain even temperatures. For average conditions, set the heat anticipator indicator to match the current rating of the primary heating control. Move indicator approximately 1/2 division in direction indicated by the arrows on the thermostat for longer “ON” cycles, or move lever in opposite direction for shorter “on” cycles. Allow at least 24 hours to determine if setting provides satisfactory operation before making any further adjustments.

41514-01 12-21-2001

MERCURY BULB

MECHANICAL

CLIMATE

TECHNOLOGY

CORPORATION

CTC thermostats regulate 24 to 30 VAC single-stage heating-cooling systems. See the chart below for specific models and applications.

THERMOSTAT MODELS AND APPLICATIONS

PART SWITCHING

NUMBER APPLICATION ORIENTATION SYSTEM FAN

43004 Use in standard heating/cooling systems. Horizontal Heat-Off-Cool On-Auto 43005 Vertical

43301 Use in oil- or gas-fired systems. Horizontal 43302 Vertical

43306 Use in central electric heat system. Horizontal 43307 Vertical

SPECIFICATIONS

ELECTRICAL DATA Switch Rating: 24VAC (30 VAC max.)

Heating - 0.15 to 1.2 amps Cooling - 0-1.5 amps

Switch Action: Sealed mercury switch Anticipator rating:

Heating - Adjustable from 0.15 to 1.2 Amps Cooling - Fixed 24 VAC

THERMAL DATA Temperature Range: 50ºF - 90ºF (10ºC - 32ºC)

WARNING!

DISPOSAL INFORMATION

This product contains mercury in a sealed tube. DO NOT place this control in the trash at the end of its useful life.

If this product is replacing a control that contains mercury, DO NOT place the old product in the trash.

Contact your local waste management authority for instructions regarding recycling and the proper disposal of this product, or of and for any old control containing mercury in a sealed tube.

INSTALLATION

When installing this product:

• Read these instructions thoroughly. Failure to follow them could damage the product or produce an unsafe condition.

• Check the ratings in these instructions and on the product to make sure the product is compatible with your application.

To avoid electrical shock or equipment damage, make sure power is disconnected before installation.

THERMOSTAT

APPLICATIONS

This thermostat is designed for use with:

• Standard heating and cooling systems

• Electric heating and cooling systems

• Single stage heat pump systems

• Two-transformer systems

• Electronic air cleaners

• Humidifiers

• Zone Dampers

This thermostat cannot be used with:

• Millivolt systems

• Multi-stage applications

• Installation must be performed by a trained, experienced service technician.

• Upon completion of the installation, verify the correct operation of the product as detailed in these instructions.

LOCATION

The thermostat should be located in an area with good air circulation at average temperature. It should be on an inside wall.

DO NOT place the thermostat where it can be affected by:

- drafts or dead spots behind doors or in corners.

- hot or cold air from ducts.

- radiant heat from the sun, fireplaces, or appliances.

- unheated (uncooled) areas behind the thermostat, such as outside walls.

This thermostat is a precision instrument and was carefully adjusted at the factory. Handle it

carefully.

ATTACH SUB-BASE TO WALL

Disconnect the power supply before beginning installation to prevent electric shock or equipment damage.

All wiring must comply with local codes and ordinances.

To wire and mount the thermostat:

1. Pull wires through opening near center of sub-base and connect wires beneath terminal screws (See figure 2 for typical wiring for each application, Also refer to the following subsections for special system configurations).

2. Push excess wiring into wall and plug hole with fire-resistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.

3. Position sub-base over hole in wall and mark mounting hole locations on wall.

4. Drill mounting holes.

5. Fasten sub-base loosely to wall, using two mounting screws to secure sub-base. Use a level or plumb line to adjust until level. If using a plumb line, use the indicator triangles on the sub-base to level the unit. If holes in wall are too large and do not allow you to tighten sub-base snugly, use plastic screw anchors to secure sub-base.

An incorrectly leveled thermostat will cause the temperature control to deviate from the setpoint.

ATTACH THERMOSTAT TO SUB-BASE

1. Remove cover from thermostat base by gripping the base in one hand. Use the other hand to pull gently at the top or bottom of the cover.

2. Carefully remove the protective packing.

3. Attach thermostat base to sub-base, being sure that all captive screws are tightnened snugly, since they serve as electrical connections between thermostat and sub-base.

4. Snap cover on thermostat and set switches and temperature lever to desired setpoint

5. Turn on power to the system.

SPECIAL APPLICATIONS

Electric Heat Furnaces

(Single Transformer Systems only)

The sub-base, as supplied, may not operate the fan correctly. If both the heating and the cooling system must operate the fan relay, remove the factory-installed jumper wire from the Y terminal and connect it to the A terminal. The fan should now cycle when the thermostat calls for either heat or cool.

Two-Transformer Systems

If two transformers are used, they must be in phase. Failure to do so may result in personal injury and/or

property damage.

NOTE: Wire color does not indicate polarity. Polarity is obtained from an oscilloscope or voltmeter.

Heat Pump Applications

This sub-base WILL NOT provide multi-stage heating or cooling operation. For single stage heat pump applications, install a short jumper wire across terminals W and Y. If the old thermostat has a terminal that is continuously energized, disconnect the wire from the old thermostat’s terminal and connect it either to the: 1) B terminal, if the reversing valve is energized on a call for heat; or to the 2) O terminal, if the reversing valve is energized on a call for cool. If the system heats on a call for cool, or vice versa, this wire has been connected to the wrong terminal.

NOTE: RH and RC must be jumpered for single transformer heat pump systems.

Special Application Terminals

The B and O terminals can provide switching for special functions other than heat pump operation. When the system switch is in the HEAT position, the B terminal is energized. When the system switch is in the COOL position, the O terminal is energized.

TYPICAL WIRING DIAGRAMS

GRC

FAN

RELAY

GRC

COMPRESSOR

RELAY

SYSTEM

COOL HEAT

OFF

COMPRESSOR

RELAY

SYSTEM

OFF

COOL HEAT

SYSTEM

OFF

COOL HEAT

HEAT

RELAY

HEAT

RELAY

Yellow Jumper

FAN

AUTO ON

FIGURE 3 SINGLE TRANSFORMER H/C SYSTEM

For electric heat-fan to cycle with either heat or cool, move yellow jumper from

Y terminal to A terminal (see dotted line at terminal A in illustration.)

FAN

AUTO ON

FAN

RELAY

FIGURE 4 TWO TRANSFORMER H/C SYSTEM

IMPORTANT: Remove factory-installed jumper

between RC and RH terminals for this application.

FAN

AUTO ON

Subbase

Thermostat

Cover

FIGURE 1 ATTACH THERMOSTAT TO SUB-BASE

FIGURE 2 THERMOSTAT SUB-BASE

GRC

Factory Installed

Jumper Wire

FAN

RELAY

COMPRESSOR

RELAY

Field Installed

Jumper Wire

* O Terminal energized in cooling.

B**

**B Terminal energized in heating.

FIGURE 5 SINGLE TRANSFORMER, SINGLE STAGE HEAT PUMP SYSTEM

Install jumper between W and Y terminals. (See illustration.)