Robertshaw 8600 User manual

1
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 ENERGY STAR®setpoints for each day of
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.
110-1097B
5 - 2 Day Programmable
1 Heat / 1 Cool
User’s Manual
Quick Start
Installation and
Programming
W
A
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Y
2
T
W
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E
A
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DIGITAL
PROGRAMMABLE
THERMOSTAT
8600
ELECTRIC
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GAS
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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.
110-1097B 3/8/05 10:39 AM Page 1

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.
2
!
110-1097B 3/8/05 10:39 AM Page 2

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. DO NOT INSTALL BEHIND A DOOR, IN A CORNER, NEAR AIR VENTS,
IN DIRECT SUNLIGHT, OR NEAR ANY HEAT OR STEAM GENERATING FIXTURES. INSTALLATION
AT THESE PLACES WILL AFFECT THERMOSTAT OPERATION.
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
heat off cool
hold
vac
prog
run/sethold
temp
clock
set
auto on
MON
°
F
select set
select set
heat off cool
hold
vac
prog
run/set hold
temp
clock
set
auto on
MON
°
F
heat off cool auto on
Figure 2
!
110-1097B 3/8/05 10:39 AM Page 3

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
RH
RC
GOB Y1W1
MON
°
F
Mounting Holes
ELECTRIC/GAS SWITCH
Selects fan control.
+
+
_
_
HP OPTION SWITCH
Heat pump switch.
Figure 3
Correct battery
placement
110-1097B 3/8/05 10:39 AM Page 4

Wiring Diagrams
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
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
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6
Heating
Control
(COOLING)
Transformer
(HEATING)
Transformer
Hot
120 VAC 24 VAC
24 VAC
Hot
120 VAC
Cooling
Control
HEAT/COOL
5-WIRE
TWO TRANSFORMER NOTE: Disconnect
factory installed jumper.
Hot
Compressor
Contactor
Transformer
24 VAC
120 VAC
HEAT PUMP WITH
COOL ACTIVE
REVERSING VALVE
RH
RC
W1
Y1
B
G
O
RC
RH
W1
Y1
G
CAUTION: Both transformers
must be in phase or damage
may result.
to the equipment and thermostat
Hot
Transformer
24 VAC
120 VAC
HEAT PUMP WITH
HEAT ACTIVE
REVERSING VALVE
RH
RC
W1
NOTE: Factory
Installed Jumper
NOTE: Factory
Installed Jumper
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: Make sure the HP switch
is in the HP position.
NOTE: Make sure the HP switch
is in the HP position
When switched to HP mode,
When switched to HP mode,
W1 is connected internally to Y1.
W1 is connected internally to Y1.
O
B
Fan
Relay
Reversing
Valve
Fan
Relay
Compressor
Contactor Y1
G
O
B
Reversing
Valve
Fan
Relay
Wiring Diagrams
110-1097B 3/8/05 10:39 AM Page 6

7
To Test Thermostat
WARNING: DO NOT SHORT (JUMPER) ACROSS TERMINALS OF GAS
VALVE OR SYSTEM CONTROL TO TEST OPERATION. THIS WILL
DAMAGE THE THERMOSTAT AND VOID YOUR WARRANTY.
CAUTION: DO NOT SWITCH SYSTEM TO COOL OR LEAVE IN COOL MODE
IF THE TEMPERATURE IS BELOW 50°F (10°C). THIS CAN
DAMAGE THE AIR CONDITIONING SYSTEM AND CAUSE
PERSONAL INJURY.
1. Place the HEAT-OFF-COOL switch into the
COOL position. The will be displayed.
2. Press the button until the temperature
setting is at least 3 degrees below the room
temperature. The air conditioning system
should turn on within a few seconds.
NOTE: ONCE THE THERMOSTAT TURNS OFF WHEN IN THE COOL MODE,
A BUILT IN 5-MINUTE DELAY PREVENTS THE SYSTEM FROM
TURNING ON AGAIN. THIS PROTECTS THE COMPRESSOR. NO
ADDITIONAL TIME DELAY RELAY IS REQUIRED. TO OVERRIDE THE
5-MINUTE DELAY FOR INSTALLATION, PRESS THE RESET BUTTON.
3. Put the HEAT-OFF-COOL switch into the OFF
position. The air conditioning system should
turn off.
4. Put the HEAT-OFF-COOL switch into the HEAT
position. The will be displayed.
5. Press the button until the temperature
setting is at least 3 degrees above room
temperature. The heating system should turn on. The fan may
not turn on immediately, depending on the fan delay built into
the furnace.
NOTE: If HP is selected, the heat will not come on until the 5 minute
short cycle protection has expired.
6. Put the HEAT-OFF-COOL switch into the OFF
position. The heating system should turn off.
The fan may continue to run for a short
period of time.
7. Put the AUTO-ON switch into the ON
position. The blower fan should turn on.
The display will show a .
8. Put the AUTO-ON switch into the AUTO
position. The blower fan should turn off.
heat off cool
heat off cool
heat off cool
heat off cool
auto on
auto on
!
110-1097B 3/8/05 10:39 AM Page 7

Programming Guide
SETTING TIME OF DAY AND
DAY OF WEEK
1. Press SELECT until the cursor is
over SET CLOCK. Press SET. The
HOURS segment will be blinking.
Use the or button to adjust
the hours setting. NOTE: The AM
or PM indicator will change as the
HOURS display rolls through a 24
hour cycle.
2. Press SET. The MINUTES segment will be blinking. Use the or
button to adjust the MINUTES setting.
3. Press SET. The DAY segment will be blinking at the top of the display.
Use the or button to adjust the day of the week. Press SET.
PROGRAMMING YOUR THERMOSTAT
The 8600 thermostat features 1-button programming. Simply follow these
steps to customize your thermostat for your lifestyle.
1. Place the HEAT-OFF-COOL switch into the HEAT position. Make sure
the cursor is in the RUN/SET PROG position. Press SET. The HOURS
segment will be blinking. MON thru FRI
(the work week) will be displayed across
the top. AM1 will be illuminated in the
lower right hand corner. You can now
start programming the first event of the
work week.
2. Use the or button to adjust the hour of the first event.
Press SET.
3. The MINUTES segment will be blinking. Use the or button to
adjust the minutes. Press SET.
4. The temperature should be blinking. Use the or button to
adjust the desired temperature of the first event. Press SET.
5. AM2 should now be displayed. Repeat
steps 2-4 to program the remaining events
(PM1 and PM2) for the work week. There
are a total of 4 events.
8
MON = MONDAY
TUE = TUESDAY
WED = WEDNESDAY
THU = THURSDAY
FRI = FRIDAY
SAT = SATURDAY
SUN = SUNDAY
select set
heat off cool
hold
vac
prog
run/set hold
temp
clock
set
auto on
MON
°
F
select set
hold
vac
prog
run/set hold
temp
clock
set
o on
Cursor
110-1097B 3/8/05 10:39 AM Page 8

6. After pressing SET for the 4th event, the
day of the week along the top will switch
to SAT SUN and AM1 will be displayed.
Repeat steps 2-4 to program the
weekend settings.
7. With the weekend settings programmed, place the HEAT-OFF-COOL
switch in the COOL position. Repeat steps 2-6 to program the
cooling settings.
CUSTOMIZING YOUR THERMOSTAT
Settings
System
Cool: The thermostat controls the cooling.
Off: The heating and cooling systems are off.
Heat: The thermostat controls the heat.
Fan
Auto: Equipment controls the fan.
On: The fan operates continuously.
Temperature Differential
The temperature differential is factory set at 1.0°F (.5°C). This means that
whenever the room temperature changes by one degree Fahrenheit
from the temperature setting, the system will turn on. If the system turns
on too often, increase the temperature differential.
Changing Fahrenheit (°F) to Celsius (°C), Clock Setting, Temperature
Differential, and Filter Monitor
You can change temperature scales (F or C), set a 12 or 24 hour clock,
adjust differentials and change the filter monitor setting by following
these instructions.
1. Press SELECT and SET at the same time.
Hold for 3 seconds. An Fshould be
blinking in the display. Use the or
button to toggle between Farhenheit (F)
or Celsius (C).
2. Press SET. CLOC will be displayed in the
lower left corner. Use the or
button to toggle between 12 or 24 for the
clock setting.
3. Press SET. diFF will be displayed in the
lower left corner. Use the or
button to adjust the 1st stage differential
between 1°F and 3°F (1°C and 1.5°C).
4. Press SET. CHECK FILTER will be
displayed and the length of the filter set-
ting will be blinking in the lower left cor-
ner. Use the or button to adjust the
filter setting from 0 (OFF) to 9900 hours.
NOTE: The filter timer is based on
equipment run time. Select the length of time based on your filter's
recommended service interval.
5. Press SET or wait 5 seconds and the thermostat will return to the
normal operating mode.
9
110-1097B 3/8/05 10:39 AM Page 9

Begin Programmed Operation
1. Make sure the cursor is above RUN/SET PROG.
2. Place AUTO–ON switch into AUTO.
3. Place HEAT-OFF-COOL switch into COOL or HEAT depending on
the season.
Temporary Program Hold
You can temporarily increase or decrease the temperature and hold it for
3 hours or until the next program event, whichever comes first.
1. Press the or button. The temperature will blink. Using the
or button, adjust the temperature to the desired level.
2. Press SET.
Another way to select a temporary hold is:
1. Press SELECT until the cursor is over TEMP HOLD. Press SET.
The temperature will be blinking. Use the or button to change
the temperature.
2. Press SET.
To cancel a temporary hold, press SELECT until the cursor is above
RUN/SET PROG. Press SET.
Vacation Hold
You can set your thermostat to hold a desired temperature for 1-365 days.
Vacation hold terminates at midnight of the last day. The thermostat
returns to normal operation the next day at 12:01 AM.
1. Press SELECT until the cursor is over VAC HOLD. Press SET.
The temperature will be blinking. Use the or button to change
the temperature.
2. Press SET. 7d will be displayed. Use the or button to adjust
between 1 and 365 days.
3. Press SET.
To cancel a vacation hold, press SELECT until the cursor is above
RUN/SET PROG. Press SET.
10
select set
heat off cool
hold
vac
prog
run/set hold
temp
clock
set
auto on
MON
°
F
heat off cool auto on
select
hold
vac
prog
run/set hold
temp
clo
s
110-1097B 3/8/05 10:39 AM Page 10

Check Filter Reset
Once the filter timer has expired,
CHECK FILTER will turn on and stay
on. To clear the message and reset
the timer:
1. Press SELECT and SET and hold
for 3 seconds. CLr will appear in
the time display.
2. Press any key to clear the message.
The display will transition to the tem-
perature scale display. See step 4 in
CUSTOMIZING YOUR THERMOSTAT.
3. No further input is needed. Within a few seconds, the display will
return to the normal operating mode.
♦Backlit Display
This thermostat is equipped with a backlight to make night time temper-
ature adjustments quick and easy. Press the button to activate the
backlight. The backlight will turn off after about 10 seconds of inactivity.
Reset
The RESET button is located above the upper left corner of the display.
Only use the reset feature if the thermostat is malfunctioning.
11
RH
RC
GOB Y1W1
MON
°
F
RESET
BUTTON
110-1097B 3/8/05 10:39 AM Page 11

Troubleshooting
Symptom Remedy
Thermostat does not turn Check wiring.
on system. (See Installing Item 8600
Thermostat)
Thermostat turns on and off too Increase temperature differential.
frequently. (See Programming Guide)
Display is blank, flashing or Replace batteries.
constant LO BAT.
System fan does not operate Move Electric/Gas switch to
properly. either gas or electric, to match
system. (See Installing Item
8600 Thermostat)
Time shown on display is not the Change time of day setting.
current time of day. (See Programming Guide)
Thermostat does not Thermostat may not have been
follow program. programmed in HEAT or COOL
position. Verify program.
Check AM/PM indicators at time
of day and programmed time
changes.
(See Programming Guide)
Verify program and day of week
are correct.
(See Programming Guide)
12
Note: Although the thermostat has a low battery indicator, replace the
batteries once a year to prevent leakage and to prevent the ther-
mostat and heat/cooling system from shutting down due to lack
of battery power in the thermostat.
If problems with thermostat cannot be resolved, call:
Technical Support: [phone]
Monday-Friday 7:30 AM - 5:30 PM CST
For after hours service, a 24-hour automated help line is available.
110-1097B 3/8/05 10:39 AM Page 12

13
Two Year Limited Warranty
Invensys Controls Americas warrants to the original contractor installer,
or to the original consumer user, each new Robertshaw
thermostat to be free from defects in materials and workmanship under
normal use and service for a period of two (2) years from date of
purchase. This warranty and our liability does not apply to batteries or
merchandise that has been damaged by misuse, neglect, mishandling,
alterations, improper installation, or use in a way other than in
accordance with Invensys Controls Americas recommendations
and instructions.
Invensys Controls Americas agrees to repair or replace at its option any
thermostat under warranty provided it is returned within the warranty
period, postage prepaid, with proof of the date of purchase. Cost of
thermostat removal or reinstallation is not the responsibility of Invensys
Controls Americas.
Repair or replacement as provided under this warranty is the exclusive
remedy of the consumer. Invensys Controls Americas shall not be liable
for any incidental or consequential damages for breach of any express or
implied warranty on this product, or under any other theory of liability.
Except to the extent prohibited by applicable law, any implied warranty of
merchantability or fitness for a particular purpose on this product is
limited to the duration of this warranty.
Some states do not allow the exclusion or limitation of incidental or
consequential damages, or allow limitations on how long an implied
warranty lasts, so the above limitations or exclusions may not apply to
you. This warranty gives you specific legal rights, and you may also have
other rights which vary from state to state.
For warranty returns, send thermostat, shipping prepaid to:
Invensys Controls Americas
Warranty Claims Department
515 S. Promenade
Corona, CA 92879-1736
©2005 Invensys Controls Americas 110-1097B
Controls Americas
191 E. North Avenue
Carol Stream, Illinois 60188
United States of America
110-1097B 3/8/05 10:39 AM Page 13

NOTES
14
110-1097B 3/8/05 10:39 AM Page 14