Emerson 1E78-151 Instruction Manual
Emerson 1E78-151 Spesification
ELECTRICAL DATA
Electrical Rating: MV to 30 VAC 50/60 Hz. or D.C. 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
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 |
|
12 VDC Mobile Home Application |
Yes |
|
Multistage Systems |
No |
|
Systems Exceeding 30VAC, 1.5 Amp |
No |
Emerson 1E78-151 THERMOSTAT DETAILS
W903 - clip to disable EMR feature
W904 - clip for Celcius display
W905 - clip for hydronic system
NOTE: Earlier models refer to 37-7006 for jumper locations.
REMOVING OLD THERMOSTAT
Before removing wires from old thermostat’s switching subbase, label each wire with the terminal designation it was removed from.
- 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.
- Shut off electricity at the main fuse box until installation is complete. Ensure that electrical power is disconnected.
- 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.
- Identify each wire attached to the old thermostat.
- Disconnect the wires from the old thermostat one at a time. DO NOT LET WIRES FALL BACK INTO THE WALL.
- Install new thermostat using the following procedures.
Emerson 1E78-151 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.
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
- 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).
- Connect wires beneath terminal screws on base using appropriate wiring schematic (see figs. 2 through 7).
- Place base over hole in wall and mark mounting hole locations on wall using base as a template.
- Move base out of the way. Drill mounting holes.
- 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.
- 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 requires 2 “AAA” alkaline batteries to operate. If appears on the display Low Battery, 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).
Readmore and Download Emerson 1E78-151 Instruction Manual PDF
| Title | : Emerson 1E78-151 Instruction Manual PDF |
| Format | |
| Pages | : 267 Pages |
| Language | : English |
| File Size | : 2 MB |
