1F85-277
Heating & Air Conditioning
7 Day/5-1-1 Programmable/Non-programmable, Auto
Changeover, Multi-Stage/Heat Pump Thermostat
INSTALLATION INSTRUCTIONS
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.
YOUR THERMOSTAT REPLACES
Description | |
Heat Pump (No Aux. or Emergency Heat) | Yes |
Heat Pump (with Aux. or Emergency Heat) | Yes |
Standard Heat & Cooling Systems | Yes |
Two Stage Heat & Two Stage Cool | Yes |
PREPARATIONS
Assemble tools required as shown below.
FLAT BLADE SCREWDRIVER
Standard Heat Only Systems | Yes |
HAND OR POWER
WIRE CUTTER/STRIPPER
Millivolt Heat Only Systems – Floor or Wall Furnaces | Yes |
Standard Central Air Conditioning | Yes |
Gas or Oil Heat | Yes |
Electric Furnace | Yes |
Hydronic (Hot Water) Zone Heat – 2 Wires | Yes |
Hydronic (Hot Water) Zone Heat – 3 Wires | No |
DRILL WITH 3/16 INCH DRILL BIT, IF NEEDED
REMOVING OLD THERMOSTAT
!CAUTION
To prevent electrical shock and/or equipment dam- age, disconnect electric power to system at main fuse or circuit breaker box until installation is complete.
Before removing wires from old thermostat's switching sub- base, label each wire with the terminal designation it was removed from.
1.Shut off electricity at the main fuse box until installation is complete. Ensure that electrical power is disconnected.
2.Remove Old Thermostat: A standard heat/cool thermostat consists of three basic parts:
a.The cover, which may be either a
b.The base, which is removed by loosening all captive screws.
c.The switching subbase, which is removed by unscrewing the mounting screws that hold it on the wall or adaptor plate.
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.
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.
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| Y2 |
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| C |
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| R |
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| E/W1 |
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| Y1 |
O | B L | W2 G |
| Mounting |
Mounting |
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| Hole | |
Hole |
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ELEC. |
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| GAS | |
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| ON |
| AUTO | Switch |
Figure 1 – Thermostat base
ATTENTION! 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
Mercury must not be discarded in household trash. When the unit this product is replacing is to be discarded, place in a suitable container and return to
PART NO. | ||
of Emerson Electric Co. | ||
0430 | ||
