Robertshaw 988-1R - Manual

MECHANICAL THERMOSTAT
• MODEL 984-1R: COOLING ONLY
• MODEL 986-1R: HEATING ONLY
• MODEL 988-1R: HEATING and COOLING
INSTALLATION INSTRUCTIONS
Please read all instructions carefully before starting. Leave this instruction sheet
near the thermostat when you are finished.
SPECIFICATIONS
For use with self-powered 250-750 millivolt generating systems and 2 wire (Models
984 and 986) or 2, 3, 4 and 5 wire (Model 988) electric, gas or oil systems equipped
with 24 VAC controls.
Electrical Rating: 24 to 30 VAC (or 250-750mV)
Heat Anticipator: 0.1 A to 1.2 A (Adjustable)
Cool Anticipator: 0 to 1.5 A (Fixed)
IMPORTANT SAFETY INFORMATION
• Always turn off power at the main power source (unscrew fuse or switch circuit
breaker to the off position) before installing, removing, cleaning, or servicing
thermostat.
• Read this manual entirely before installing this thermostat.
• This is a 24VAC low-voltage thermostat. Do not install on voltages higher than
30VAC.
• 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 relay to test the
installation. This will damage the thermostat and void the warranty.
• (For models 984-1R and 988-1R) To avoid damage to the air conditioner, do
not operate if the outside temperature is below 50
°F. Please refer to the air
conditioner manufacturer’s recommendations.
SELECTING THERMOSTAT LOCATION
For accurate temperature control and comfort, selecting the proper location is
very important. If this is a new installation, the guidelines below should be fol-
lowed. When replacing an old thermostat, install the new thermostat in the same
location unless these guidelines suggest otherwise.
1. Locate the thermostat on an inside wall of a frequently occupied area (e.g., fami-
ly room) about 4-5 feet above the floor.
2. Do not install the thermostat where there are unusual sources of heat, such
as in direct sunlight or near a radiator, duct vent, lamp, or fireplace.
3. Do not install the thermostat where there are unusual cooling sources such as an
outside wall, drafts from doors, windows, stairways or duct vents.
4. Do not install the thermostat where the air circulation is poor, such as in a
corner, alcove, or behind a door.
REMOVING OLD THERMOSTAT
1. Shut off electricity to your heating and/or cooling system by removing the
associated fuse or switching the circuit breaker off.
2. Remove the cover of the old thermostat. If you do not see the system
wires, then you wilI have to remove another section of the thermostat.
This may require the use of a screwdriver.
3. Observe the terminal markings of each wire. Label each wire with tape indi-
cating the appropriate terminal markings to allow easy installation of the
Robertshaw thermostat.
4. After you have labeled the existing wires, remove the wires from the terminals.
5. Remove the old thermostat base from the wall.
6. Hold the Robertshaw thermostat in one hand. Carefully remove cover
from thermostat base by pulling upward gently. Remove the paper
barrier around the magnet before final installation. Failure to remove the
paper barrier will result in the switch mechanism not working properly.
7. Position thermostat base on wall and carefully feed existing wires
through opening. The Robertshaw thermostat must be leveled to
provide good appearance and reliable performance.
8. After you have finished positioning the Robertshaw thermostat, you can
mark the placement of the two screw holes for mounting. Set aside
thermostat base.
9. If you are mounting the thermostat on plasterboard or another type of
soft material, use the supplied plastic anchors. Use a 3/16” drill to make
two holes where the mounting holes have been marked. Insert the
anchors into the holes.
10. Feed the wires back through the base, then mount to wall with supplied
screws.
11. Connect the wires to their associated marked terminals.
12. Check all connections so that adjacent wires are not touching.
13. Replace the cover onto the base by snapping it into place.
14. Recheck the level to make sure the unit has not shifted.
15. Make sure the system selector switch is in the OFF position until you
are ready to check your wiring.
INTERNAL FAN OPTION (MODEL 988-1R ONLY)
For typical gas or oil heating systems, connect the G wire to the G1 gas/oil termi-
nal of the Robertshaw thermostat to allow a natural system delay in fan operation
during the heat mode. If the heating system requires the fan to come on immedi-
ately with the heat (i.e., electric heating systems), then connect the G wire to the
G2 electric terminal.
G1 gas/oil: Fan on with delay in heat
G2 electric: Fan on immediately with heat
SETTING THE HEAT ANTICIPATOR
To help provide accurate control of furnace heat cycles, you must adjust the
anticipator setting of the Robertshaw thermostat to match the current rating of
the system control device.
This setting can be found by looking at the
setting used on the previous thermostat. If
you are unable to find it, the information can
be found in the owner’s manual for the
heating system. You can also find the
information printed on the control device at
the furnace. The control device is normally a
gas valve, relay, or pilot generator located
behind the furnace cover.
If the current rating is still unavailable,
connect an AC ammeter between the RH and
W terminals on the thermostat. Let the
system operate through the
ammeter for at least one minute before taking
the reading. This reading can be used as the
setting for the anticipator.
If your system is a millivolt system, set the anticipator to 1.2.
CHECK THE WlRING
CAUTION: DO NOT jump across the gas valve or relay to test the
thermostat.This will destroy the thermostat and void the warranty.
Model 984-1R only:
CAUTION: To avoid damage to the air conditioner, do not operate if the outside
temperature is below 50
°F (10°C). Please refer to the recommenda-
tions of the air conditioner’s manufacturer.
1. Slide the system selector switch to the COOL position and the fan switch
to the AUTO position.
2. Set the temperature 6
° to 8° BELOW the room temperature. The cooling
system and fan should turn on.
3. Slide the system selector switch to the OFF position. The cooling system
should turn off.
Model 986-1R only:
1. Turn on the power to the furnace.
2. Adjust the temperature setting of the thermostat 6° to 8° ABOVE room tem-
perature. The heating system should turn on. The fan may take a few min-
utes to turn on depending on the delay built into the furnace.
3. Adjust the temperature setting of the thermostat 6° to 8° BELOW room tem-
perature. The heating system should turn off. Once again, the fan may have
a delay.
Model 988-1R only:
1. Turn on the power to the furnace.
2. Slide the system selector switch to the HEAT position and the fan switch
to the AUTO position.
3. Adjust the temperature setting of the thermostat 6° to 8° ABOVE room tem-
perature. The heating system should turn on. The fan may take a few min-
utes to turn on depending on the delay built into the furnace.
4. Slide the system switch to the OFF position. The heating system should
turn off. Once again the fan may have a delay.
CAUTION: To avoid damage to the air conditioner, do not operate it if the outside
temperature is below 50° F (10
°C). Please refer to the recommenda-
tions of the air conditioner’s manufacturer.
5. Slide the system selector switch to the COOL position, and the fan switch
to the AUTO position.
6. Set the temperature 6° to 8° BELOW the room temperature. The cooling
system and fan should turn on.
7. Slide the system selector switch to the OFF position. The cooling system
should turn off.
THREE YEAR LIMITED WARRANTY
The manufacturer 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 three
(3) years from date of purchase. This warranty and our liability does not apply to
batteries or the merchandise that have been damaged, caused by misuse, neg-
lect, mishandling, alterations, improper installation, or use in a way other than in
accordance with the manufacturer recommendations and instructions.
The manufacturer 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 the manufacturer.
Repair or replacement as provided under this warranty is the exclusive remedy of
the consumer. The manufacturer shall not be liable for any incidental or conse-
quential damages for breach of any express or implied warranty of 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
the product is limited to the duration of the 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. You also may have other rights which vary from state to
state.
Instructions for return: Pack the thermostat carefully in a well-padded carton. Be sure
to include a note describing in detail what is wrong with the product. Return, postage pre-
paid, to:
Invensys Controls
515 South Promenade Avenue
Corona, CA 92879-1736
Attn: Warranty Department
Technical Service Available
M-F 7:30 AM to 5:30 PM CST
Inside US telephone: (800) 445-8299
®
INTERNAL FAN OPTION)
,
,
For longer ON times
0.4 AMP
Typical Gas Valve
Current Rating
MODELS 984-1, 986-1, 988-1
MODEL 988-1 Two Transformers
One Transformer
THERMOSTAT
THERMOSTAT
HEATING
CONTROL
HEATING
CONTROL
COOLING
CONTROL
COOLING
CONTROL
**
** **
** *
* *
*
Fan control for gas or oil heating systems Fan control for gas or oil heating systems
Fan control for electric heating systems Fan control for electric heating systems
120 VAC 120 VAC
120 VAC
24 VAC 24 VAC
24 VAC
FACTORY
INSTALLED
JUMPER
REMOVE
FACTORY
INSTALLED
JUMPER
HOT
HOT
COMMON
COMMON
L1
L1
L2
L2
W
W
G2
G2
Y
Y
G1
G1
RC
RC
RH
RH
L1
L2
HOT
COMMON
MODELS 984-1R 986-1R 988-1R
MODELS 988-1R
WIRING DIAGRAMS
Terminal designations:
984-1R: Y, G, R
986-1R: W, R
988-1R: W, G, Y, RC, RH
110-330H
191 E. North Avenue
Carol Stream, IL 60188
United States of America
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
28C Leigh Fisher Blvd.
El Paso, TX 79906
Attn: Mercury Recycling Center