Leveling is for appearance only and will not affect thermostat operation. If you are using existing mounting holes, or if holes drilled are too large and do not allow you to tighten base snugly, use plastic screw anchors to secure subbase. Push excess wire into wall and plug hole with a fire-resistant material such as fiberglass insulation to prevent drafts from affecting thermostat operation.
If is displayed, the batteries are low and should be replaced. For best results, replace batteries once a year with new.
To replace the batteries, install the batteries along the top of the base see fig. Figure 2. Typical wiring diagram for heat only, 3-wire, single transformer systems. Figure 3. Typical wiring diagram for cool only, 3-wire, single transformer systems. RED jumper wire provided with thermostat must be. Figure 4. Figure 5. Figure 6. Typical wiring diagram for heat pump with reversing valve energized in COOL.
Figure 7. Typical wiring diagram for heat pump with reversing valve energized in HEAT. To prevent static discharge problems, touch side of thermostat to release static build-up before touching any keys. If at any time during testing your system does not operate properly, contact a qualified service person.
If your system does not have a G terminal connection, skip to. Turn on power to the system. The blower should begin to operate. The blower should stop immediately. This thermostat has a time delay between cooling cycles to allow the head pressure in the compressor to stabilize. If the temperature is adjusted to call for cool within 5 minutes of the last cycle the snowflake icon will blink indicating the thermostat is locked out.
After 3 to 5 minutes, the compressor will start and the snowflake icon will stop flashing. This helps prevent the compressor from cycling too quickly and is normal operation for the thermostat. Press to adjust thermostat setting below room temperature. The blower should come on immediately on high speed, followed by cold air circulation. Press to adjust temperature setting above room temperature. The cooling system should stop operating.
If the heating system has a standing pilot, be sure to light it. Press to adjust thermostat setting above room temperature. The heating system should begin to operate. Press toadjusttemperaturesettingbelowroomtemperature. The heating system should stop operating. Before you begin using your thermostat, you should be familiar with its features and with the display and the location and operation of the thermostat buttons. Your thermostat consists of two parts: the thermostat cover and the base.
To remove the cover, gently pull it straight out from the base. To replace the cover, line up the cover with the base and press gently until the cover snaps onto the base. Nothing else will be displayed. Refer to Now that you are familiar with the thermostat buttons and display, read the following information to learn about the many features of the thermostat. Heat Only Electric Heat Systems 24 volt. Millivolt Systems Floor or Wall Furnaces. Figure 1. Thermostat base. Thermostat Details Mounting and Wiring Check Thermostat Operation Failure to follow and read all instructions carefully.
Before removing wires from old thermostat's switching subbase,. The cover, which may be either a snap-on or hinge type. The base, which is removed by loosening all captive screws. The switching subbase, which is removed by unscrewing.
Shut off electricity at the main fuse box until installation is. Ensure that electrical power is disconnected. Remove the front cover of the old thermostat. With wires still. If the old thermostat. Identify each wire attached to the old thermostat using the. Identify each wire attached to the old thermostat using the.
Disconnect the wires from the old thermostat one at a time. Install new thermostat using the following procedures. Table of Contents. Previous Page. Next Page. White Rodgers 1f78 Installation Instructions Manual 13 pages. This product does not contain mercury.
How- ever, this product may replace a unit which contains mercury. Do not open mercury cells. If a cell becomes damaged, do not touch any spilled mercury. Wearing non-absorbent gloves, take up the spilled mercury and place into a container which can be sealed. Typical wiring diagram for heat only, 3-wire, single transformer systems Cooling System Relay Figure 3.
Your thermostat consists of two parts: the thermostat cover and the base. To remove the cover, gently pull it straight out from the base.
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