White Rodgers 1F97-1271 Installation, Wiring Connections, Battery Location Remove Old Thermostat

INSTALLATION

!WARNING

Thermostat installation and all components of the control system shall conform to Class II circuits per the NEC code.

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.

7.Carefully line the thermostat up with the base and snap into place.

Battery Location

Remove Old Thermostat		2 "AA" alkaline batteries are included in the thermostat at
A standard heat/cool thermostat consists of three basic parts:		the factory with a battery tag to prevent power drainage.
1. The cover, which may be either a snap-on or hinge type.		Remove the battery tag to engage the batteries.
2. The base, which is removed by loosening all captive screws.		To replace batteries, set system to OFF, remove thermostat
3. The switching subbase, which is removed by unscrewing		from wall and install the batteries in the rear along the top of
the mounting screws that hold it on the wall or adapter		the thermostat (see Figure 1).
plate. Before removing wires from old thermostat,		Figure 1 – Thermostat base and rear view of 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.
Installing New Thermostat		Mounting	Mounting
1. Pull the thermostat body off the thermostat base. Forcing		Hole	Hole
or prying on the thermostat will cause damage to the unit.		Place Level		Place Level
2. Place base over hole in wall and mark mounting hole
locations on wall using base as a template.	across Mounting Tabs		across Mounting Tabs
	(for appearance only)		(for appearance only)
3. Move base out of the way. Drill mounting holes. If you
			2 "AA" Batteries
are using existing mounting holes and the holes drilled
are too large and do not allow you to tighten base snug-
ly, use plastic screw anchors to secure the base.

4.Fasten base snugly to wall using mounting holes shown in Figure 1 and two mounting screws. Leveling is for appearance only and will not affect thermostat operation.

5.Connect wires to terminal block on base using appropriate wiring schematic (see Figures 2 & 3).

WIRING CONNECTIONS

Refer to equipment manufacturers' instructions for specific system wiring information. After wiring, see CONFIGURA- TION section for proper thermostat configuration.

TERMINAL DESIGNATION DESCRIPTIONS

Wiring diagrams shown are for typical systems and describe the thermostat terminal functions.

Terminal Designation	Description	Terminal Designation	Description
W	Heat Relay	L	Heat pump malfunction indicator for
G	Fan Relay		systems with malfunction connection
RH	Power for Heating	O	Changeover valve for heat pump energized
RC	Power for Cooling		constantly in cooling
C	Common wire from secondary side of cooling	B	Changeover valve for heat pump energized
	system transformer or heat only system transformer		constantly in heating
		Y	Compressor Relay

Figure 2 –	CLASS II
Two Transformer System	TRANSFORMER
	HEATING

Figure 3 – Single Transformer System

System
Malfunction
Switch
Low	Optional (Heat Pump)
Voltage		L
System	Malfunction Indicator
Power	Changeover
		O
	Valve Cooling

Changeover	B
Valve Heating
Compressor	Y
Contactor

NOTE: If continuous backlight or hardwired power input are desired but do not function in both HEAT and COOL modes, cut the heating transformer 24V wires and tape off. Connect the neutral circuit disconnected from the heating transformer to the neutral circuit of the cooling transformer. Disconnect the wire to the RH terminal and install a jumper between RH and RC. Depending on the system requirements, replace the cooling transformer with a 75VA class II transformer if needed.

	NEUTRAL
	24VAC		LINE IN
		HOT
W	Heat
	Relay
G	Fan
	Relay
RH
		Remove
RC		Jumper
C
Optional
Common		HOT
Connection			LINE IN
	24VAC
	NEUTRAL
		CLASS II
		TRANSFORMER
		COOLING

System

Heat

W

Malfunction

Relay

Low

Switch

Voltage

Optional (Heat Pump)

L

System

Malfunction Indicator

Power

Changeover

O

Fan

G

Energized in Cooling

Relay

Changeover

B

RH

* Single transformer heat and cool

Energized in Heating

*

systems require a jumper from

RC to RH for heat only systems.

Compressor

Y

RC

Attach power to RH. For cool only

Relay

C

attach power to RC.

Optional 24VAC

Common

Connection

24 Volt

Common

LINE IN

24 Volt

Hot

CLASS II

TRANSFORMER

NOTE: Heat Pump without Aux: If using L for MALF indicator, C must be connected. Terminals W and Y must be jumpered and CR HEAT must be selected to SL in Configuration Menu item 6.

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