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White Rodgers 1F85-0422 Blue Universal Thermostat Instruction Manual
INSTALLATION
Figure 1 – Battery door shown open
WARNING
!
Thermostat installation and all components of the
control system shall conform to Class II circuits per
the NEC code.
“AA” Alkaline Batteries
Remove Old Thermostat
A standard heat/cool thermostat consists of three basic parts:
1) The cover, which may be either a snap-on or hinge type.
2) The base, which is removed by loosening all captive
screws.
Thermostat can be powered by system AC power or Battery.
If
is displayed, the thermostat is battery powered. If
is not displayed, thermostat is system powered with optional
battery back-up. When battery power remaining is approxi-
3) The switching subbase, which is removed by unscrewing
the mounting screws that hold it on the wall or adapter
plate. Before removing wires from old thermostat,
label each wire with the terminal designation from
which it was attached. Disconnect the wires from the
old thermostat one at a time. Do not let wires fall back
into the wall.
mately half, the
will be displayed. When “Change
”
is displayed, install fresh “AA” alkaline batteries immediately.
For best results, replace all batteries with new premium brand
alkaline batteries such as Duracell® or Energizer®. We recom-
mend replacing batteries every 2 years. If the home is going
to be unoccupied for an extended period (over 3 months) and
is displayed, the batteries should be replaced before
leaving. When less than two months of battery life remain, the
setpoint temperature will offset by 10 degrees (10 degrees
cooler in Heat mode / 10 degrees warmer in Cool mode). If
offset occurs, the normal setpoint can be manually reset with
Installing New Thermostat
1) Pull the thermostat body off the thermostat base. Forcing
or prying on the thermostat will cause damage to the unit.
2) Place base over hole in wall and mark mounting hole
locations on wall using base as a template.
or
. Another offset will occur within two days if batter-
3) Move base out of the way. Drill mounting holes. If you
are using existing mounting holes and the holes drilled
are too large and do not allow you to tighten base snugly,
use plastic screw anchors to secure the base.
ies are not replaced.
Figure 2 – Thermostat base and rear view of thermostat
4) Fasten base snugly to wall using mounting holes shown
in Figure 2 and two mounting screws. Leveling is for
appearance only and will not affect thermostat operation.
5) Connect wires to terminal block on base.
Mounting
Hole
Mounting
Hole
6) Push excess wire into wall and plug hole with a fire re-
sistant material (such as fiberglass insulation) to prevent
drafts from affecting thermostat operation.
Place Level
Place Level
across
Mounting Tabs
(for appearance only)
across
Mounting T a bs
(for appearance only)
7) Carefully line the thermostat up with the base and snap
into place.
Batteries
2 “AA” alkaline batteries are included with the thermostat.
To install the batteries, pull the battery door as shown by the
arrow and lift open. Using the polarity indicated inside the bat-
tery door, insert the batteries. To close the battery door, swing
the door down while pulling in the direction of arrow. Once
fully down, snap the door back into position. To replace the
batteries, set system to OFF.
WIRING CONNECTIONS
Refer to equipment manufacturers’ instructions for specific Refer to 37-6895 for 1F83-0422/1F85-0422 wiring diagram
system wiring information. After wiring, see CONFIGURATION specifications.
section for proper thermostat configuration.
TERMINAL DESIGNATION DESCRIPTIONS
Terminal
Designation
Terminal
Designation Description
Description
L...............Heat pump malfunction indicator for systems
with malfunction connection
O..............Changeover valve for heat pump energized
constantly in cooling
B ..............Changeover valve for heat pump energized
constantly in heating
Y ..............Compressor Relay
W/E............Heat Relay/Emergency Heat Relay (Stage 1)
W2.............2nd Stage Heat (3rd Stage Heat in HP 2)
G..............Fan Relay
RH.............Power for Heating
RC.............Power for Cooling
C ..............Common wire from secondary side of cooling system
transformer or heat only system transformer
6...............3 Wire Zone Valve – Energized when no call for Heat
Y2 .............2nd Stage Compressor
2
| General | Details |
|---|---|
| Name | White Rodgers 1F85-0422 Blue Universal Thermostat Instruction Manual |
| Make | WHITE RODGERS |
| Language | English |
| Filetype | PDF (Download) |
| File size | 0.38 MB |
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