White Rodgers 1E78-144 Installation Manual

White Rodgers 1E78-144 Installation Manual

YOUR THERMOSTAT REPLACES

Typical System Compatibility Chart

1E78

Standard Heat Only Two Wire Gas or Oil Fired Systems (24 volt)

Yes

Electronic Ignition Heat Only Two Wire Systems (24 volt)

Yes

Electronic Ignition Heat Only Gas or Oil Fired Systems (24 volt)

Yes

Standard Heat/Cool Systems (24 volt)

Yes

Heat/Cool Systems Electric Heat (24 volt)

Yes

Heat Only Electric Heat Systems (24 volt)

Yes

Cool Only Systems (24 volt)

Yes

Heat Pump Systems (No Aux. or Emergency Heat)

Yes

Hot Water Zone Heat Only (Two Wire) Systems

Yes

Hot Water Zone Heat Only (Three Wire) Systems

No

Line Voltage Heating or Baseboard 110/240 Volt Systems

No

Millivolt Systems Floor or Wall Furnaces

Yes

VDC Mobile Home Application

Yes

Multistage Systems

No

Systems Exceeding 30VAC, 1.5 Amp

No

White Rodgers 1E78-144 MOUNTING AND WIRING

Electric Heat or Single-Stage Heat Pump Systems

This thermostat is configured from the factory to operate a heat/cool, fossil fuel (gas, oil, etc.), forced air system. It is configured correctly for any system that DOES NOT require the thermostat to energize the fan on a call for heat. If your system is an electric or heat-pump system that REQUIRES the thermostat to turn on the fan on a call for heat, locate the GAS/ELECTRIC switch (see fig. 1) and switch it to the ELECTRIC position. This will allow the thermostat to energize the fan immediately on a call for heat. If you are unsure if the heating/ cooling system requires the thermostat to control the fan, contact a qualified heating and air conditioning service person.

Hydronic (Hot Water or Steam) Heating Systems

This thermostat is set to operate properly with a forced-air heating system. If you have a hydronic heating system (a system that heats with hot water or steam), you must set the thermostat to operate properly with your system. The factory default setting is forced air heat. Clipping jumper W905 on the circuit board will produce a longer heating cycle which is normally for hot water or steam (hydronic) systems. Both settings produce a very accurate temperature control and can be set to your personal preference. As received, the thermostat cycles the system just under 1˚F. With W905 clipped, the system cycles at approximately 1.5˚F.

White Rodgers 1E78-144 MOUNTING AND WIRING

Energy Management Recovery (EMR)

This thermostat is set to operate with EMR. This causes the thermostat to start the heating or cooling system early to have the room temperature reach the program setpoint at the time the period is to start. To disable EMR, clip jumper W903 (see Fig. 1). Attach Thermostat Base to Wall

  1. Remove the packing material from the thermostat. Gently pull the thermostat body straight off the base. Forcing or prying on the thermostat will cause damage to the unit. If necessary, move the electric heat switch (see ELECTRIC HEAT SYSTEMS, above).
  2. Connect wires beneath terminal screws on base using appropriate wiring schematic (see figs. 2 through 7).
  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. 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.

White Rodgers 1E78-144 Battery Location

This thermostat requires 2 “AAA” alkaline batteries to operate. If indicator battery low is appears on the display, the batteries are low and should be replaced with fresh “AAA” Energizer® alkaline batteries. The batteries are located on the back of the thermostat body (see fig. 1).

CHECK White Rodgers 1E78-144 THERMOSTAT OPERATION

White Rodgers 1E78-144 Fan Operation
If your system does not have a G terminal connection, skip to Heating System.

  1. Turn on power to the system.
  2. Move FAN switch to ON position. The blower should begin to operate.
  3. Move FAN switch to AUTO position. The blower should stop immediately.

White Rodgers 1E78-144 Cooling System

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.

  1. Move SYSTEM switch to COOL position.
  2. Press DOWN to adjust thermostat setting below room temperature. The blower should come on immediately on high speed, followed by cold air circulation
  3. Press UP to adjust temperature setting above room temperature. The cooling system should stop operating.

Heating System

  1. Move SYSTEM switch to HEAT position. If the heating system has a standing pilot, be sure to light it.
  2. Press UP to adjust thermostat setting above room temperature. The heating system should begin to operate.
  3. Press DOWN  to adjust temperature setting below room temperature. The heating system should stop operating.

Readmore and Download White Rodgers 1E78-144 Installation Manual

Title : White Rodgers 1E78-144 Installation Manual
Format : PDF
Pages : 8 Pages
Language : English
File Size : 1 MB

 

 White Rodgers 1E78-144 Installation Manual