Robertshaw 110-10978 User Manual

110-1097B

5 - 2 Day Programmable
1 Heat / 1 Cool

User’s Manual

Quick Start
Installation and
Programming

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DIGITAL
PROGRAMMABLE
THERMOSTAT

8

600

ELECTRIC

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GAS

G

OIL

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®

NeW

HEAT PUMP

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As an ENERGY STAR®partner, Invensys Controls Americas has determined
that this thermostat product meets the ENERGY STAR®guidelines for
energy efficiency.

Application

The Robertshaw 8600 is a single-stage thermostat designed to control
24 VAC gas or electric heating and cooling systems or single-stage
heat pumps.

Features

• Large backlit display.

• Four preprogrammed E
the week.

• Two AA ENERGIZER brand batteries retain time of day settings even
during power outages.

• Low battery indicator.

• Fahrenheit/Celsius display option.

• Programmable from 45°F (4°C) to 90°F (32°C).

• Accuracy within ± 1 degree.

• Adjustable temperature differential: 1-3 °F (1-1.5°C).

• Separate heating and cooling programs.

• Low temperature freeze protection. While in heat mode, the
thermostat will mechanically turn on the heat if the temperature
drops to 40°F (4°C) – even if the batteries are drained or missing.

NERGY STAR

1

®

setpoints for each day of

!

WARNING:

Always turn off power at the main power source by unscrewing

•

fuse or switching circuit breaker to the off position before installing,
removing, cleaning, or servicing thermostat.

Read all of the information in this manual before installing or

•

programming this thermostat.

DO NOT CONNECT TO 120 VAC. This is a 24V AC low voltage ther-

•

mostat. Do not install on voltages higher than 30V AC.

All wiring must conform to local and national building and electrical

•

codes and ordinances.

Do not short (jumper) across terminals on the gas valve or at the

•

system control to test installation. This will damage the thermostat
and void the warranty.

Do not connect ground to any terminal in this unit.

•

Recycling Thermostat

If this thermostat REPLACES a thermostat that contains mercury,
DO NOT discard the old thermostat in the regular trash. Mercury
is harmful to humans and the environment. For this reason, do
not open, break, or crush the mercury cell. If mercury leaks from
a damaged cell, DO NOT touch or handle mercury with bare
hands. Use protective, non-absorbent gloves to place mercury
into a sealable container. Fill the container with sand or another
absorbent material and seal the container completely.

Return the mercury or mercury products, in a sealed container, to
Invensys Controls Americas or a local recycling center for proper
disposal. If you have any questions, call Robertshaw technical
support at 1-800-445-8299.

Invensys Controls Americas
28C Leigh Fisher Blvd.
El Paso, TX 79906
Attn: Mercury Recycling Center

Replacing Existing Thermostat

Wiring Table

Old Label New Label Description

M, W, RH, R5 or R RH Heat transformer, hot side

V or RC RC Cooling transformer, hot side

Y or Y6 Y1 Cooling control

H, W or 4 W1 Heating control

F or G G Fan control relay

O O Cool active reversing valve

B B Heat active reversing valve

NOTE: ON SOME OLDER MODELS, THE C TERMINAL CAN BE EITHER THE COOLING CONTROL OR

THE COMMON SIDE OF THE TRANSFORMER. CHECK FURNACE WIRING DIAGRAM TO
VERIFY C TERMINAL. IF IT IS THE COMMON SIDE OF THE TRANSFORMER, CAP THE
WIRE AND TUCK INTO THE WALL. IF IT IS THE COOLING CONTROL, CONNECT TO THE
Y TERMINAL.

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select

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heat off cool

auto on

!

WARNING:

In heat pump applications, do not connect anything to the W1
terminal. When switched to HP mode, W1 is connected internally
to Y1 on the thermostat.

1. Turn off power to heating and cooling system.

2. Remove cover of old thermostat to expose wires. Do not
disconnect wires. (See Figure 1)

3. Label wires per the Wiring Table.

4. After labeling wires, remove wires from terminals.

5. Remove existing thermostat base from wall.

6. Refer to the following section for instructions on how to
install thermostat.

Figure 1

Installing Item 8600 Thermostat

NOTE: FOR NEW INSTALLATIONS, MOUNT THERMOSTAT ON AN INSIDE WALL, 4-5 FEET

ABOVE THE FLOOR
IN DIRECT SUNLIGHT, OR NEAR ANY HEAT OR STEAM GENERATING FIXTURES. INSTALLATION
AT THESE PLACES WILL AFFECT THERMOSTAT OPERATION

. DO NOT INSTALL BEHIND A DOOR, IN A CORNER, NEAR AIR VENTS,

.

MON

run/set

prog

select

heat off cool

temp
hold

auto on

°

F

set

vac

clock

hold

set

1. Turn power off to the heating and cooling systems.

2. Place HEAT-OFF-COOL in OFF position.

3. Place AUTO–ON switch
into AUTO position.

4. Remove the cover using a coin
or screwdriver (see Figure 2).

5. Place thermostat against the
wall at desired location. Make
sure wires will feed through
opening on base of thermostat.

3

Figure 2

Figure 3

Mounting Holes

_

MON

GOB Y1W1

ELECTRIC/GAS SWITCH
Selects fan control.

RH

RC

°

F

+
_

Correct battery
placement

+

HP OPTION SWITCH
Heat pump switch.

6. Mark placement of mounting holes (see Figure 3). Set base aside.

7. Drill the marked holes using a 3/16” (5mm) drill bit. NOTE: Enclosed
plastic anchors do not require a drilled hole for drywall.

8. Tap plastic anchors into the wall.

9. Align base with plastic anchors and feed wires through opening
(see Figure 3).

10. Secure base to wall with supplied screws.

11. Connect wires to terminal strip. Refer to wiring diagrams on page 5.
Make sure wire connections are secure.

12. Place Electric/Gas switch into either the ELEC or GAS position
depending on the type of furnace (see Figure 3).

13. Place the HP option switch into either the NON_HP or HP position
depending on the type of system you are using (see Figure 3). Use
the HP position for heat pumps ONLY. Use the NON_HP setting for
everything else.

14. Install two AA ENERGIZER brand batteries or equivalent into battery
compartment. Be sure to match positive (+) ends of batteries with
positive (+) battery terminals in the battery compartment. See Figure
3 for correct battery placement.

15. Replace cover on thermostat by snapping into place.

16. Turn on power to system. Test thermostat as described in the
section To Test Thermostat.

4

Wiring Diagrams

Hot

Heating
Control

Fan

Control

Cooling
Control

Transformer

T
H
E

R
M
O
S

T
A

T

RH

RC

W1

Y1

G

O

B

24 VAC

120 VAC

Hot

Heating
Control

Fan

Control

Transformer

24 VAC

120 VAC

Hot

Heating
Control

Transformer

24 VAC

120 VAC

HEAT/COOL

4-WIRE

SINGLE TRANSFORMER

HEAT ONLY

2-WIRE

SINGLE TRANSFORMER

HEAT ONLY

SINGLE TRANSFORMER

3-WIRE

Factory-Installed

Jumper

Hot

Cooling
Control

Fan

Control

Transformer

24 VAC

120 VAC

COOL ONLY

3-WIRE

SINGLE TRANSFORMER

RH

RC

W1

Y1

G

Factory-Installed

Jumper

RH

RC

W1

Y1

G

RH

RC

W1

Y1

G

T
H
E
R
M
O
S

T
A

T

T
H
E
R
M
O
S

T
A

T

T
H
E
R
M
O
S

T
A

T

NOTE: Remove factory
installed jumper

O

B

O

B

O

B

The following is just a sample of the most common types of HVAC
systems. Refer to your system’s installation manual for wiring information.

5