Robertshaw 9620 User manual

Important Safety Information
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.
•This is a 24V AC low voltage thermostat. 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.
1
110-732E
7 Day Programmable
2 Heat / 2 Cool
W
A
R
R
A
N
T
Y
INTEGRATED COMFORT SOLUTIONS
™
DIGITAL
PROGRAMMABLE
THERMOSTAT
9620
User’s Manual
Quick Start
Installation and
Programming
®
HEAT PUMP
H
©2001 Maple Chase Company
As an ENERGY STAR®partner, Maple Chase has
determined that this thermostat product meets
the ENERGY STAR®guidelines for energy efficiency.
!

Features
•Four preprogrammed ENERGY STAR®setpoints for each day of the week
•Quickset™ programming for quickly programming all days of the
week simultaneously
•Energy Efficient Recovery (EER™)
•Residual cooling for added air conditioning efficiency
•Two AA ENERGIZER®brand batteries retain program memory,
even during power outages
•Low battery indicator
•Multi-colored LED indicators for system status
•Zone compatible as master thermostat
•Fahrenheit/Celsius display option
•Programmable from 45°F (7°C) to 90°F (32°C)
•Accuracy within ±1 degree
•Adjustable temperature differential: 1-3 degrees
•Maintains summer and winter programming
Step 1: Replacing Existing Thermostat
1. Turn off power to heating and cooling system.
2. Remove cover of old thermostat to expose wires. (Figure 1)
FIGURE 1
3. Disconnect wires one at a time from existing terminals. use
enclosed labels to mark existing wires. Refer to cross references in
Table 1 if existing wiring does not directly match the labels.
•If you have any questions about cross referencing the old terminal to
the new label, reference your equipment installation manual, a
licensed contractor, or call Robertshaw Tech Support [phone].
4. Remove existing thermostat base from wall.
2

TABLE 1
Old Terminal New Label Description
R, V-VR or VR-R R 24 VAC
Y, Y1 or M Y1 Stage 1 Cooling/Heating Circuit
O or R O Reversing Valve (Cooling Mode)
BBReversing Valve (Heating Mode)
G or F G Fan Contactor Circuit
Y2 Y2 2nd Stage Cooling Circuit
W1 or W2 or W-U W2 2nd Stage Heating Circuit
L or X L System Monitor LED
EEEmergency Heating Circuit
C, X or B C 24 VAC Transformer Common Side
NOTE: THIS THERMOSTAT REQUIRES A 24V AC COMMON WIRE FOR PROPER OPERATION.
5. After labeling wires, remove wires from terminals.
6. Remove existing thermostat base from wall.
7. Refer to the following section for instructions on how to
install thermostat.
Recycling Thermostat
If this thermostat is replacing a thermostat that contains mercury in a
sealed tube, do not place your old thermostat in the garbage. Contact your
local waste management authority for instructions regarding proper dis-
posal of the thermostat. If you have any questions, call Robertshaw tech-
nical support at 1-800-445-8299.
Step 2: Installing Model 9620 Thermostat
NOTE: FOR NEW INSTALLATIONS, MOUNT THERMOSTAT ON INSIDE WALL, 4-5 FEET ABOVE THE FLOOR. DONOT INSTALL
BEHIND A DOOR, IN A CORNER, NEAR AIR VENTS, IN DIRECT SUNLIGHT, OR NEAR ANY HEAT OR STEAM GENERATING FIX-
TURES. INSTALLATION AT THESE PLACES WILL AFFECT THERMOSTAT OPERATION.
IMPORTANT: THIS THERMOSTAT IS COMPATIBLE WITH 100% LOCKOUT SYSTEMS. TORESET THE SYSTEM, TURN
THERMOSTAT TO OFF POSITION FOR AT LEAST 60 SECONDS.
1. Turn off power to the heating and cooling systems.
2. Place COOL-OFF-HEAT-EM in OFF position.
3
PROG
MAN
SET PROG/MAN COOL-OFF-HEAT-EM
AUX CHECK EMER
AUTO - ON
>
>
AUTO - ON
COOL-OFF-HEAT-EM

3. Place AUTO-ON switch into AUTO position.
4. Remove the cover using a coin or screwdriver (Figure 2).
FIGURE 2
5. Place thermostat against the wall at desired location. Make sure
wires will feed through opening on base of thermostat.
6. Mark placement of mounting holes (Figure 3). Set base aside.
FIGURE 3
7. Drill the marked holes using a 3/16" drill bit. NOTE: Enclosed plastic
anchors do not require a drilled hole for drywall.
8. Tap plastic anchors into the holes.
9. Align base with plastic anchors and feed wires through opening
(Figure 3).
4
EM
PROG
MAN
Y2
Y1
E
G
W2


FAN AUTO ON
COOL OFF HEAT EM
CHANGE SET PROG/MAN
AM
PM
MORN DAY EVE NITE EER


O
B
C L R
MOUNTING HOLES
WIRE OPENING

10. Secure base to wall with supplied screws.
11. Terminal screws are loosened. Insert wires into terminal strip
(Figure 4) matching the label to the corresponding terminal (see
Wiring Diagrams below). Tighten screws.
5
9620 WIRING SAMPLE #1
Y1 E G W2CLRY2
Typical heat pump with cool active reversing valve and auxiliary/emergency heat.
OB
B
9620 WIRING SAMPLE #2
CLRY2Y1EGW2O
Typical heat pump with heat active reversing valve and auxiliary/emergency heat.
RY2
Jumper
9620 WIRING SAMPLE #3
BY1 E G W2CL O
Typical heat pump with heat active reversing valve and auxiliary/emergency heat.
Does not have separate wire for emergency heat (jump W2 & E).
OB
9620 WIRING SAMPLE #4
CW2LRY2Y1 E G
Typical heat pump with cool active reversing valve, auxiliary/emergency heat
and second stage of cooling. System fault indicator connected (L terminal).
FIGURE 4

6
12. 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.
13. Replace cover on thermostat by snapping into place.
14. Turn on power to system. Test thermostat as described in the
following section.
TERMINAL LEGEND - 9620
TERM EQUIPMENT TO CONNECT REQ? TERMINAL FUNCTION
C24VAC common connection Yes For input of 24VAC common
side of transformer
LSystem fault indicator connection No For connection of system
fault indicator (if present)
R24VAC hot connection Yes For input of 24VAC hot side
of transformer
Y2 Second stage cooling connection No Energizes on a call for sec-
ond stage cooling
Y1 First stage compressor connection Yes Energizes on a call for first
stage heating or cooling
EEmergency heat connection No* Energizes on a call for heat
in the EM mode only
GIndoor fan connection Yes Energizes with E, Y1, Y2 and
W2 terminals or with FAN
option switched to the ON
position
W2 Second stage heat connection No* Energizes on a call for sec-
ond stage of heat (auxiliary
heat)
OCool active reversing Yes** Energizes when in the in
valve connection COOL mode
BHeat active reversing Yes** Energizes when in the
valve connection HEAT or EM modes
*For systems using a backup heat source. If separate E terminal connection is not available,
jumper E and W2.
** Most heat pump systems will have a cool active OR a heat active reversing valve. Use the
appropriate terminal.

Step 3: Testing the 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: DONOT SWITCH SYSTEM TO COOL IF THE TEMPERATURE IS BELOW 50°F (10°C). THIS CAN DAMAGE
THE AIR CONDITIONING SYSTEM AND CAUSE PERSONAL INJURY.
1. Place the COOL-OFF-HEAT-EM
switch into the COOL position
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: O NCE THE THERMOSTAT TURNS THE SYSTEM OFF WHILE IN THE COOL OR HEAT MODE , ABUILT - IN DELAY KEEPS THE COM -
PRESSOR FROM TURNING ON FOR ABOUT 5 MINUTES . T HIS PROTECTS THE COMPRESSOR . N OADDITIONAL TIME DELAY RELAY ( DELAY ON
BREAK
) IS NECESSARY . T OOVERRIDE THE 5- MINUTE DELAY FOR INSTALLATION , PRESS RESET. T HIS WILL ERASE THE DELAY AS WELL
AS ALL PROGRAMMING
.
3. Put the COOL-OFF-HEAT-EM switch into
the OFF position. The air conditioning
system should turn off. The fan may
continue to run for a short period of time.
4. Put the COOL-OFF-HEAT-EM switch
into the HEAT position.
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.
6. Put the COOL-OFF-HEAT-EM switch
into the OFF position. The heating
system should turn off. Once again,
the fan may have a delay.
7. Put the AUTO-ON switch
to the ON position. The blower
fan should turn on.
8. Put the AUTO-ON switch
to the AUTO position. The blower
fan should turn off.
7
COOL-OFF-HEAT-EM
COOL-OFF-HEAT-EM
COOL-OFF-HEAT-EM
COOL-OFF-HEAT-EM
AUTO - ON
AUTO - ON
>
>

Step 4: Customizing Your Thermostat
◆Set Time of Day, Day of Week,
Temperature Differential,
Residual Cooling
1. Press SET and PROG/MAN.
Release simultaneously.
Press or to change time of day.
2. Press Press
to change day of week.
3. Press Press
to change 1st stage
temperature differential.
NOTE: THE TEMPERATURE DIFFERENTIAL IS FACTORY PRESET AT 1°. THIS MEANS THAT
WHENEVER THE ROOM TEMPERATURE CHANGES BY ONE FULL DEGREE FROM THE TEMPERA-
TURE SETTING, THE SYSTEM WILL TURN ON. IFTHE SYSTEM TURNS ON TOO OFTEN,
INCREASE THE TEMPERATURE DIFFERENTIAL.
4. Press Press
to change 2nd stage
temperature differential.
NOTE: THE SECOND STAGE TEMPERATURE DIFFERENTIAL IS FACTORY PRESET AT 2°.
5. Press Press
to change
residual cooling.
NOTE: THE RESIDUAL COOL FEATURE WILL KEEP THE SYSTEM FAN ON FOR AN
ADDITIONAL 30, 60, OR 90 SECONDS AFTER THE COMPRESSOR CYCLES OFF IN COOL
MODE. THE RESIDUAL COOL FEATURE CAN BE SET ONLY IN THE COOL MODE.
8
>
>
PROG
MAN
SET PROG/MAN COOL-OFF-HEAT-EM
AUX CHECK EMER
AUTO - ON
>
>
SET PROG/MAN
SET P
>
>
1=MO
2=TU
3=WE
4=TH
5=FR
6=SA
7=SU
SET P
>
>
SET
P
>
>
SET
P
>
>
>
>

◆Changing Fahrenheit (F) to Celsius (C)
Press and hold SET. Press
Release both simultaneously.
◆Energy Efficient Recovery (EER™)
The Energy Efficient Recovery (EER™) feature looks ahead up to 2 hours
prior to the end of the setback (or set-up) period to begin monitoring per-
formance and calculating when to turn on your system. It also determines
whether the auxiliary heat or cool stages should be activated prior to set-
point time to meet your chosen setpoint temperature. The thermostat will
indicate EER in the display when this program feature is active. The EER™
feature will lockout the auxiliary stages until 20 minutes prior to upcoming
setpoint time to utilize the most energy efficient first stage. The auxiliary
stages of heating and cooling will be available during this lock-out period
to maintain the setpoint temperature should the system not be able to
keep up with the heating or cooling demand.
Step 5: Setting the Program
This Robertshaw thermostat is preprogrammed with the following
ENERGY STAR®settings for the greatest energy savings.
Setting Time Heat Setpoint Cool Setpoint
Temperature Temperature
MORN 6:00 a.m. 70°F 78°F
DAY 8:00 a.m. 62°F 85°F
EVE 5:00 p.m. 70°F 78°F
NITE 10:00 p.m. 62°F 82°F
These settings can be customized using the following QuickSet™ or daily
programming guides.
9
SET P
>

◆QuickSet™ Programming Mode
QuickSet™ will program all 7 days of the week with the same program.
1. Place COOL-OFF-HEAT-EM
in COOL or HEAT position.
2. Press and hold SET. Press the button.
Release simultaneously.
3. The MORN indicator should be blinking. Program the time of day and
the temperature as outlined in the Setting Daily Program section.
◆Setting Daily Programming
1. Place COOL-OFF-HEAT-EM
in COOL position.
2. Press SET button. The display will
show a number from 1 to 7. This
number represents the day of the
week to be programmed. If pro-
gramming individual days, press
either or button to adjust
the day of the week to program.
3. Press SET. Press or to change
MORN time.
4. Press SET.
5. Press or to change
MORN temperature.
6. Repeat steps 2-5 for DAY, EVE, and NITE.
7. Repeat steps 2-6 above to program
any other day of the week.
8. Shift COOL-OFF-HEAT-EM to HEAT position.
9. Repeat steps 2-6 to program HEAT (winter) settings.
10
>
>
PROG
MAN
SET PROG/MAN COOL-OFF-HEAT-EM
AUX CHECK EMER
AUTO - ON
>
>
COOL-OFF-HEAT-EM
SET PR
>
>
>
>
PROG
MAN
SET PROG/MAN COOL-OFF-HEAT-EM
AUX CHECK EMER
AUTO - ON
>
>
SET PR
>
>
PROG
MAN
SET PROG/MAN COOL-OFF-HEAT-EM
AUX CHECK EMER
AUTO - ON
>
>
SET P
>
>
COOL-OFF-HEAT-EM
COOL-OFF-HEAT-EM
>
>

11
>
>
ET PROG/MAN C
PROG
MAN
PROG
MAN
SET PROG/MAN COOL-OFF-HEAT-EM
AUX CHECK EMER
AUTO - ON
>
>
>
>
PROG
MAN
SET PROG/MAN COOL-OFF-HEAT-EM
AUX CHECK EMER
AUTO - ON
>
>
PROG
MAN
SET PROG/MAN COOL-OFF-HEAT-EM
AUX CHECK EMER
AUTO - ON
>
>
AUTO - ON
SUMMER
WINTER
COOL-OFF-HEAT-EM
COOL-OFF-HEAT-EM
NOTE: O NCE THE THERMOSTAT TURNS THE SYSTEM OFF WHILE IN THE COOL OR HEAT MODE , ABUILT - IN DELAY KEEPS THE COMPRESSOR FROM TURN -
ING ON FOR ABOUT 5 MINUTES . T HIS PROTECTS THE COMPRESSOR . N OADDITIONAL TIME DELAY RELAY ( DELAY ON BREAK ) IS NECESSARY . T OOVERRIDE
THE
5- MINUTE DELAY FOR INSTALLATION , PRESS RESET. T HIS WILL ERASE THE DELAY AS WELL AS ALL PROGRAMMING .
◆Begin Programmed Operation
1. Place AUTO-ON
into AUTO.
2. Place COOL-OFF-HEAT-EM
into COOL or HEAT,
depending on the season.
3. Press PROG/MAN button
until indicator is in PROG position.
◆ Temporary Program Override
To temporarily increase or decrease temperature:
Press or .
The thermostat will automatically return to the program at the next sched-
uled setting change or after four hours.

12
◆Manual Operation
1. Press PROG/MAN until indicator is in MAN position.
2. Press or to adjust
temperature settings.
◆Reset
To reset the thermostat to factory preprogrammed conditions,
press the RESET button located beneath the lower left corner
of the display.
PROG
MAN
SET PROG/MAN COOL-OFF-HEAT-EM
AUX CHECK EMER
AUTO - ON
>
>
TPROG/MAN
PROG
MAN
>
>
PROG

MAN


Y2


Y1

E

G
W2



FAN AUTO ON
COOL OFF HEAT EM
CHANGE SET PROG/MAN
AM
PM
MORN DAY EVE NITE EER
RESET BUTTON
O
B
C L R
>
>

13
If problems with thermostats cannot be resolved, call:
Technical Support: [phone]
Monday-Friday 7:30-5:30 CST
Troubleshooting
SYMPTOM REMEDY
Thermostat does not turn
on system. Check wiring. (See Installing Model 9620
Thermostat)
Check fuse. Replace with 3 amp
fuse if fuse has opened. Five
minute compressor short cycle
protection maybe in effect. Press
RESET to override. NOTE: This will
erase programming.
Thermostat turns on and off too
frequently. Increase temperature differential. (See Customizing Your Thermostat)
Display is blank, flashing, or
constant LO BAT. Replace batteries.
Time shown on display is not the
current time of day. Change time of day setting. (See Customizing Your Thermostat)
Thermostat does not follow
program. Thermostat in MANUAL mode. (See Customizing Your Thermostat)
Thermostat may not have been
programmed in HEAT or COOL
position. Verify program.
Check AM/PM indicators at time of
day and programmed time
changes. (See Customizing Your
Thermostat)
Verify program and day of week
is correct. (See Customizing Your
Thermostat)
Thermostat does not advance day
of week.
To view or change day of week
use method on page 5.
◆LED Indicators
The LED indicators are used to indicate system activity. The AUX indicator
illuminates during a call for second stage heating. The auxiliary stages are
used to maintain comfort during extremes in weather conditions. If the
AUX LED is illuminated too frequently during periods of moderate temper-
ature, check the differential settings (page 8).
The CHECK indicator is used to monitor system status. If the CHECK indi-
cator is illuminated, call your local HVAC service provider.
The EMER indicator is illuminated only when the system switch is moved
to the EM (emergency heat) position. The EM position is used only when
the primary stage of heat is not functioning or requires service.

14
Maple Chase Company
2820 Thatcher Road
Downers Grove, Illinois 60515
United States of America
Five-Year Limited Warranty
Maple Chase Company 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 five (5) years from date of purchase. This warranty does not
cover batteries, damage caused by batteries, damage resulting from
improper installation, alteration, misuse or abuse of the thermostat occur-
ring after the date of purchase.
Maple Chase Company agrees to repair or replace at its option any thermo-
stat 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 Maple Chase Company.
Repair or replacement as provided under this warranty is the exclusive
remedy of the consumer. Maple Chase Company 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 conse-
quential damages, or allow limitations on how long an implied warranty
lasts, so the above limitations or exclusions may not apply to you. This war-
ranty 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:
Uni-Line North America
Warranty Claims Department
515 S. Promenade
Corona, CA 91719