White Rodgers 1F85-277 User Manual

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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	1F85-277
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
Standard Heat Only Systems	Yes
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

PREPARATIONS

Assemble tools required as shown below.

FLAT BLADE SCREWDRIVER

WIRE CUTTER/STRIPPER

HAND OR POWER DRILL WITH 3/16 INCH DRILL BIT, IF NEEDED

REMOVING OLD THERMOSTAT

! CAUTION

To prevent electrical shock and/or equipment damage, disconnect electric power to system at main fuse or circuit breaker box until installation is complete.

Before removing wires from old thermostat's switching subbase, 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 snap-on or hinge type.

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.

				Y2
				C
				R
				E/W1
				Y1
O	B L	W2 G		Mounting
Mounting				Mounting
Mounting				Hole
Hole				Hole
Hole	ELEC.			GAS
				Elec-Gas
	ON		AUTO	Switch

Figure 1 – Thermostat base

ATTENTION! This product does not contain mercury. However, 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 non-absorbent gloves, clean up the spilled mercury and place into a container which can be sealed. If a cell becomes damaged, the unit should be discarded.

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 White-Rodgers at 2895 Harrison Street, Batesville, AR 72501 for proper disposal.

	White-Rodgers is a division	PART NO. 37-6560A
	of Emerson Electric Co.
		0430
	www.white-rodgers.com

MOUNTING AND WIRING

!WARNING

Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazard.

Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will damage thermostat and could cause personal injury and/or property damage.

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

Electric/Gas Switch (Fan Option)

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 you system is an electric heat or heat-pump system that REQUIRES the thermostat to turn on the fan on a call for heat, locate the ELEC/GAS switch on the back of the thermostat (see fig. 1) and switch it to the ELEC 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.

When the thermostat is configured for Heat Pump, the thermostat will always power the circulator fan on a call for heat in the HEAT mode. The ELEC/GAS switch must be set to match the type of Auxiliary heat your system uses for proper operation in the EMERgency mode.

All wiring diagrams are for typical systems only. Refer to equipment manufacturers’ instructions for specific system wiring information.

! CAUTION

Take care when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Personal injury and/or property damage may occur.

Attach Thermostat Base to Wall

1.Remove the packing material from the thermostat. Gently pull the cover straight off the base. Forcing or prying on the thermostat will cause damage to the unit.

2.Connect wires beneath terminal screws on base using appropriate wiring schematic (see figs. 2 through 4).

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. Place a level against bottom of base, 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 fireresistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.

Battery Location

2 “AA” alkaline batteries are included in the thermostat at the factory with a battery tag to prevent power drainage. You must remove the battery tag to engage the batteries.

If “BATT” is displayed, the batteries are low and should be replaced with fresh “AA” Energizer® alkaline batteries. To replace batteries, press system button to OFF, install the batteries along the top of the base (see Fig. 1). The batteries must be installed with the positive (+) end to the left.

E/W1

THERMOSTAT

C *

SYSTEM

Reversing Valve

2nd Stage

Fan

MONITOR

Emergency

Energized in Cool

Energized in Heat,

Compressor

Aux

SWITCH

Relay

Heat

Mode

Off, Emergency

Heat

Contactor

Relay

Mode

Relay

24 VAC

Hot

120 VAC

Neutral

TRANSFORMER

(Class II Current Limited)

Figure 2. Typical wiring diagram for single transformer heat pump systems

*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkaline batteries.

NOTE

If safety circuits are in only one of the systems, remove

the transformer of the system with NO safety circuits.

E/W1

THERMOSTAT

C *

CUT AND

SYSTEM

TAPE OFF!

SYSTEM

Reversing

2nd Stage

Fan

Limit or

Valve

MONITOR

Valve

Compressor

Relay

Emergency

SWITCH

Safety

HOT

Energized in

Heat

Switches

120 VAC

24 VAC

Cool Mode

Heat, Off,

Compressor

Aux

Relay

Emergency

Heat

NEUTRAL

Mode

Contactor

Relay

Hot

24 VAC

120 VAC

TWO COMMONS MUST

Neutral

TRANSFORMER

BE JUMPERED TOGETHER!

(Class II Current Limited)

Figure 3. Typical wiring diagram for two transformer heat pump systems with NO safety circuits

*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkaline batteries.

WIRING DIAGRAMS

NOTE

Polarity must be observed. If the HOT side of the second transformer is jumpered to the COMMON side of the first transformer a short will be made. Damage to equipment will occur when power is restored.

E/W1

THERMOSTAT

C *

SYSTEM

Limit or

Safety

HOT

Reversing

Safety

24 VAC

120 VAC

Switches

Emergency

SYSTEM

Switches

Reversing

Valve

2nd Stage

Fan

Heat

MONITOR

NEUTRAL

Energized in

Valve

Heat, Off,

Compressor

Relay

SWITCH

24 VAC

Auxiliary

NOTE

Energized in

ACCESSORY

Heating

Aux

Cool Mode

Emergency

Compressor

RELAY N.O.

Transformer

The accessory relay scheme

Mode

Contactor

Heat

CONTACT

(Class II

is required when safety

Relay

Current Limited)

COMMON

circuits exist in both systems.

TWO COMMONS MUST

Limit or

BE JUMPERED TOGETHER!

Safety

HOT

Switches

24 VAC

120 VAC

Switches

COMMON

NEUTRAL

Heat Pump Transformer

(Class II Current Limited)

Figure 4. Typical wiring diagram for two transformer heat pump systems with safety circuits in BOTH systems

*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkaline batteries.

Heat Pump Terminal Outputs

Refer to equipment manufacturers' instructions for specific system wiring information.

You can configure the thermostat for use with the following heat pump system types:

HEAT PUMP TYPE 1. Single stage compressor system; gas or electric backup.

This thermostat is designed to operate a single-transformer system. If you have a two-transformer system, cut and tape off

one transformer. If transformer safety circuits are in only one of the systems, remove the transformer of the system with NO safety circuits. If required, replace remaining transformer with a 75VA Class II transformer. After disconnecting one transformer, the two commons must be jumpered together.

Use the terminal output information below to help you wire the thermostat properly for your heat pump system. After wiring, see CONFIGURATION section for proper thermostat configuration.

				THERMOSTAT TERMINALS (HEAT PUMP)
SYSTEM	L	C*	R	W2	E/W1	Y2	Y1	G	O	B
Heat	Malfunction	24 Volt	24 Volt	HP 1 and	Emergency	No	Heat and	Blower/Fan Energized	Energized	Energized
Pump 1	Light	(Common)	(Hot)	Emergency	Mode	Output	Cool mode	on call for Heat	in Cool	in Heat
				2nd stage	1st stage		1st stage	and Cool	Mode	OFF
				2nd stage	1st stage		1st stage	and Cool	Mode	OFF
Heat				HP 2		2nd	(compressor)	Set GAS/ELEC switch		Emergency
Pump 2				3rd stage		stage		for Emergency mode		mode
						compressor

*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkaline batteries.

E/W1

C *

THERMOSTAT

SYSTEM

Compressor

Heat

Contactor

Relay

Reversing

Stage 2

Stage 1

Hot

Valve

Energized in

24 VAC

120 VAC

Cool Mode

Heat Mode

Compressor

Heat

Fan

Neutral

Off Emergency

Contactor

Relay

TRANSFORMER

Stage 1

Stage 2

(Class II, Current Limited)

Figure 5. Typical wiring diagram for single transformer multi-stage systems

*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkaline batteries.

Multi-Stage Terminal Outputs

Refer to equipment manufacturers' instructions for specific system wiring information.

You can configure the thermostat for use with either multi-stage electric heat systems or multi-stage gas systems. When configured for electric heat, the G terminal (blower/fan) will be energized on a call for heat.

This thermostat is designed to operate a single-transformer system. If you have a two-transformer system, cut and tape off

Use the terminal output information below to help you wire the thermostat properly for your multi-stage system. After wiring, see CONFIGURATION section for proper thermostat configuration.

				THERMOSTAT TERMINALS (MULTI-STAGE)
SYSTEM	L	C*	R	W2	E/W1	Y2	Y1	G	O	B
Multi-stage	Malfunction	24 Volt	24 Volt	Heat Mode	Heat mode	Cool Mode	Cool Mode	Blower/Fan Energized	Energized	Energized
	Light	(Common)	(Hot)	2nd stage	1st stage	2nd stage	1st stage	on call for Cool (and	in Cool	in Heat, Off,
								Heat if configured	Mode	Emergency
								to Electric Heat)		Modes

*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkaline batteries.

CHECK THERMOSTAT OPERATION

NOTE

To prevent static discharge problems, touch side of thermostat to release static build-up before touching any keys.

If at any time during testing your system does not operate properly, contact a qualified serviceperson.

Fan Operation

If your system does not have a G terminal connection, skip to

Heating System.

1.Turn on power to 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.

! CAUTION

Do not allow the compressor to run unless the compressor oil heaters have been operational for 6 hours and the system has not been operational for at least 5 minutes.

Heating System

1.Press SYSTEM button to select the Flame icon (). If the auxiliary heating system has a standing pilot, be sure to light it.

2.Press to adjust thermostat setting to 1° above room temperature. The heating system should begin to

operate. The display should show “STG1”. However, if the setpoint temperature display is flashing, the compressor lockout feature is operating (see Configuration menu, item 5).

3.Adjust temperature setting to 3° above room temperature. If your system configuration is set at MS2, HP2 or HP1, the auxiliary heat system should begin to operate and the display should show “STG1+2”.

4.Press to adjust the thermostat below room temperature. The heating system should stop operating.

Emergency System

EMER bypasses the Heat Pump to use the heat source wired to terminal E on the thermostat. EMER is typically used when compressor operation is not desired, or you prefer back-up heat only.

1.Press SYSTEM button to select EMER. “EMER” will flash on the display.

2.Press to adjust thermostat setting above room temperature. The Aux. heating system will begin to

operate. The display will show “STG1” flashing “EMER”

and Flame icon () to indicate that the Aux. system is operating.

3.Adjust temperature setting to 3° above room temperature. The auxiliary heat system should begin to operate and the display should show “STG1+2”.

4.Press to adjust the thermostat below room temperature. The Aux. heating system should stop operating.

! CAUTION

To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.

Cooling System

1.Press SYSTEM button to select the Snowflake icon ().

2.Press to adjust thermostat setting below room temperature. The blower should come on immediately on high speed, followed by cold air circulation. The display should show “STG1”.

3.Adjust temperature setting to 3° below room temperature. The second stage cooling should begin to operate and the display should show “STG1+2”.

4.Press to adjust the temperature setting above room temperature. The cooling system should stop operating.

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