White Rodgers 1F79 Thermostat Manual

Emerson White Rodgers 1F79 Thermostat Manual

Installation Instructions for Heating & Air Conditioning 1F79 Non-Programmable Heat Pump Thermostat

White Rodgers 1F79 SPECIFICATIONS

ELECTRICAL DATA
Electrical Rating:
20 to 30 VAC 50/60 Hz.
0.05 to 1.0 Amps (Load per terminal)
1.5 Amps Maximum Total Load (All terminals combined)

THERMAL DATA
Setpoint Temperature Range: 45°F to 90°F (7°C to 32°C)
Operating Ambient Temperature Range: 32°F to 105°F
Operating Humidity Range: 0 to 90% RH (non-condensing)
Shipping Temperature Range: -40°F to 150°F
 

Detail YOUR THERMOSTAT REPLACES

Description

 

Heat Pump (No Aux or Emergency Heat)

Yes

Heat Pump (with Aux or Emergency Heat)

Yes

Standard Heat & Cooling Systems

No

Standard Heat Only Systems

No

Millivolt Heat Only Systems – Floor or Wall Furnaces

No

Standard Central Air Conditioning

No

Gas or Oil Heat

No

Electric Furnace

No

Hydronic (Hot Water) Zone Heat – 2 Wires

No

Hydronic (Hot Water) Zone Heat – 3 Wires

No

Emerson White Rodgers 1F79 THERMOSTAT DETAILS

Emerson White Rodgers 1F79 THERMOSTAT DETAILS

REMOVING OLD THERMOSTAT

Before removing wires from old thermostat’s switching subbase, label each wire with the terminal designation it was removed from.

  1. Remove Old Thermostat: A standard heat/cool thermostat consists of three basic parts:
    • 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 the mounting screws that hold it on the wall or adaptor plate.
  2. Shut off electricity at the main fuse box until installation is complete. Ensure that electrical power is disconnected.
  3. Remove the front cover of the old thermostat. With wires still attached, remove wall plate from the wall. If the old thermostat has a wall mounting plate, remove the thermostat and the wall mounting plate as an assembly.
  4. Identify each wire attached to the old thermostat using the labels enclosed with the new thermostat.
  5. Disconnect the wires from the old thermostat one at a time. DO NOT LET WIRES FALL BACK INTO THE WALL.
  6. Install new thermostat using the following procedures.

ATTENTION! This product does not contain mercury. However, 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. If a cell becomes damaged, the unit should be discarded. Mercury must not be discarded in household trash. When the unit this product is replacing is to be discarded, place in a suitable shipping container. Refer to www.thermostat-recycle.org for location to send the product with mercury. 

White Rodgers 1F79 MOUNTING AND WIRING

Electric/Gas Jumper (Fan Option)

If your emergency or auxiliary system will energize the blower, then jumper W906 on the thermostat base must be cut (see fig. 1). If your emergency or auxiliary heat system requires that the thermostat energize the fan circuit, do not cut jumper W906. If you are unsure of your application, contact a qualified service person.

°F or °C Selection

The factory default setting for temperature display is Fahrenheit. If you want the temperature in Celsius, clip jumper W904.

Fast or Slow Cycle Selection

The factory default setting is fast cycle, which cycles 1st stage at approximately 1.2°F and 2nd stage 0.75°F. If you prefer slow cycle, clip jump W905. The 1st stage and 2nd stage would be 1.5°F and 1.2°F respectively.

O/B Terminal Switch Selection

The O/B switch on this thermostat is factory set to “O” position. This will accommodate the majority of heat pump applications, which require the changeover relay to be energized in COOL. If the thermostat you are replacing or the heat pump being installed with this thermostat requires a “B” terminal, to energize the changeover relay in HEAT, the O/B switch must be moved to the “B” position.

Attach Thermostat Base to Wall

  1. Remove the packing material from the thermostat. Gently pull the cover straight off the base. Forcing or prying on the thermostat will cause damage to the unit.
  2. Connect wires beneath terminal screws on base using appropriate wiring schematic (see figs. 2 through 4).
  3. Place base over hole in wall and mark mounting hole locations on wall using base as a template.
  4. Move base out of the way. Drill mounting holes.
  5. Fasten base loosely to wall, as shown in fig. 1, using two mounting screws. Place a level against bottom of base, adjust until level, and then tighten screws. (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.
  6. Push excess wire into wall and plug hole with a fire-resistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.

Battery Location

This thermostat does not require batteries to operate. The 2 “AAA” alkaline batteries are for the thermostat to remember the configuration menu selections if AC voltage is lost. If the display shows BATT or when AC power is not present, the batteries are low and should be replaced with fresh “AAA” Energizer® alkaline batteries. For best results, replace all batteries with new premium brand alkaline batteries such as Duracell® or Energizer®. To replace the batteries, install the batteries along the top of the base (see fig. 1). The batteries must be installed with the positive (+) ends to the right. Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard. Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will damage thermostat and could cause personal injury and/or property damage. Thermostat installation and all components of the system shall conform to Class II circuits per the NEC code.

White Rodgers 1F79 Typical wiring diagram for single transformer systems

White Rodgers 1F79 Typical wiring diagram for single transformer systems

White Rodgers 1F79 Typical wiring diagram for two transformer systems with NO safety circuits

White Rodgers 1F79 Typical wiring diagram for two transformer systems with NO safety circuits

White Rodgers 1F79 Typical wiring diagram for two transformer systems with safety circuits in BOTH systems

White Rodgers 1F79 Typical wiring diagram for two transformer systems with safety circuits in BOTH systems

White Rodgers 1F79 TROUBLESHOOTING

Reset Operation
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation you can reset the thermostat by pressing UP and DOWN at the same time when system is switched from “OFF” to “HEAT” position. This also resets the factory defaults. If the thermostat has power, has been reset and still does not function correctly contact your heating/cooling service person or place of purchase.

Batteries
For optimum performance, we recommend replacing batteries once a year with fresh “AAA” alkaline batteries.

Symptom

Possible Cause

Corrective Action

No Heat/No Cool/No Fan (common problems)

  1. Blown fuse or tripped circuit breaker.
  2. Furnace power switch to OFF.
  3. Furnace blower compartment door or panel loose or not properly installed.

Replace fuse or reset breaker.

Turn switch to ON.

Replace door panel in proper position to engage safety interlock or door switch.

No Heat

  1. Pilot light not lit.
  2. System Switch not set to HEAT.
  3. Loose connection to thermostat or system.
  4. Furnace Lock-Out Condition. Heat may also be intermittent.
  5. Heating system requires service or thermostat requires replacement.

Re-light pilot.

Set System Switch to HEAT and raise setpoint above room temperature.

Verify thermostat and system wires are securely attached.

Many furnaces have safety devices that shut down when a lock-out condition occurs. If the heat works intermittently contact the furnace manufacturer or local service person for assistance.

Diagnostic: Set System Switch to HEAT and raise the setpoint above room temperature. Within a few  seconds the thermostat should make a soft click sound. This sound usually indicates the thermostat is operating properly. If the thermostat does not click, try the reset operation listed above. If the thermostat does not click after being reset contact your heating and cooling service person or place of purchase for a replacement. If the thermostat clicks, contact the furnace manufacturer or a service person to verify the heating is operating correctly.

No Cool

  1. System Switch not set to COOL.
  2. Loose connection to thermostat or system.
  3. Cooling system requires service or thermostat requires replacement.

Set System Switch to COOL and lower setpoint below room temperature.

Verify thermostat and system wires are securely attached.

Same procedure as diagnostic for No Heat condition except set the thermostat to COOL and lower the setpoint below the room temperature. There may be up to a five minute delay before the thermostat clicks in Cooling.

Heat, Cool or Fan Runs Constantly.

  1. Possible short in wiring.
  2. Possible short in thermostat.
  3. Possible short in heat/cool/fan system.
  4. Fan Switch set to Fan On.

Check each wire connection to  verify they are not shorted or touching together. No bare wire should stick out from under terminal screws. Try resetting the thermostat as described above. If the condition persists the manufacturer of your system or service person can instruct you on how to test the Heat/Cool system for correct operation. If the system operates correctly, replace the thermostat.

Furnace (Air Conditioning) Cycles Too Fast or Too Slow (narrow or wide temperature swing)

1. The location of the thermostat and/or the size of the Heating (Cooling) System may be influencing the cycle rate.

Digital thermostats normally provide precise temperature control and may cycle faster than some older mechanical models. A faster cycle rate means the unit turns on and off more frequently but runs for a shorter time so there is no increase in energy use. If you would like to increase the cycle time, clip Jumper W-905 as mentioned in the instructions for Hydronic Heating Systems. It is not possible to shorten the cycle time. If an acceptable cycle rate is not achieved as received or by clipping W-905 contact a local service person for additional suggestions.

Thermostat Setting and Thermostat Thermometer Disagree

1. Thermostat thermometer setting requires adjustment.

Thermostat thermometer can be adjusted +/-3 degrees. See Temperature Display Adjustment in the Operation section

Blank Display and/or Keypad Not  Responding

1. Voltage spike or static discharge,

Use the Reset Operation listed above.

Readmore and Download White Rodgers 1F79 Thermostat Manual

Title : White Rodgers 1F79 Thermostat Manual
Format : PDF
Pages : 8 Pages
Language : English
File Size : 1 MB

 

 White Rodgers 1F79 Thermostat Manual