Robertshaw 9720 User Manual
User’s Manual
Quick Start Installation and Programming
110-662
W
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7 Day Programmable
3 Heat / 2 Cool
INTEGRATED COMFORT SOLUTIONS
™
DELUXE
PROGRAMMABLE
THERMOSTAT
9720
®
HEAT PUMP
H
2
PRODUCT FEATURES
MON
F
HEAT
PM
AUTO FAN
MANUAL
As an EnergyStar
®
partner, Maple Chase has determined that this product meets the EnergyStar®guidelines for energy efficiency.
SET
AN
PROG/M
QUICKSET
LOCK
FILTER
SYSTEM
FAN
INSTALL
• Attractive, Styleline™ design
• 7-day programming; 4 setpoints per day
• 4 pre-programmed setpoints
• EnergyStar
®
compliant
• QuickSet™ programming mode
• Autochangeover mode automatically switches system
from heat to cool
• Programmable fan control
• Detachable sub-base allows you to remove mounted thermostat
for easy, convenient programming
• Energy Efficient Recovery (EER™) mode for maximum savings
• Filter monitor notifies when to change or clean furnace filter
ASS
BYP
• Programmable keypad lock prevents unauthorized
re-programming
• NiteView™ LCD display backlight
• Programmable residual cooling fan delay for increased air
conditioning efficiency
• Allows for up to 3 remote temperature sensors
• Visual and audible low battery signal
• High temperature protection
KEYPAD QUICK REFERENCE
3
SET
- Begins, saves, and advances
programming inputs
PROG/MAN
- Sets thermostat to either
program or manual mode. Provides quick
return to normal operating mode from
any menu
QUICKSET
- Allows quick programming by
enabling user to program all seven days at
once
LOCK
- Accesses keypad “lock” and
“unlock” feature
FILTER
- Accesses filter monitor
and status
SYSTEM
- Accesses 5 modes of
operation: HEAT, COOL,
AUTO(changeover), EMER
(emergency heat), or system OFF
FAN
-Accesses two modes of fan
operation: auto and on
Decreases or
reverses setting
on display.
MAIN DISPLAY (OFF MODE)
A few seconds after power up or RESET, the display shown
above will appear. The thermostat will be in OFF mode.
1. Press SYSTEM button to enter HEAT, COOL, AUTO*
(changeover), or EMER (emergency heat) modes of
operation.
2. Press PROG/MAN button to enter program or manual
modes. Pressing PROG/MAN returns thermostat to
main display from any menu.
*AUTO may only be entered if "AUTO CHG" was enabled during installation
and you are in PROGRAM mode. (See "CHANGING DIP SWITCH SETTINGS.")
V
V
Increases or
advances setting
on display.
SET
AUTO FAN
PROG/MAN
QUICKSET
LOCK
FILTER
SYSTEM
FAN
The Robertshaw Item 9720 is directly compatible with 24V AC multi-stage heat pump systems with up to 3
stage heat/2 stage cool. It will operate with multi-stage heat pump systems that are automatic or manual
changeover and have auxiliary or emergency heating. There are no optional items required for standard
system installations.
This thermostat will automatically control the heat and/or air conditioning system. Once programmed, it will
automatically adjust the temperature setting and fan operation at your programmed times. When used
properly, this thermostat can reduce heating and cooling costs throughout the year.
TABLE OF CONTENTS
Product Features ..................................2
KeyPad Quick Reference ......................3
Important Safety Information..............5
Helpful Programming Tips ..................6
NiteView™ LCD Display Backlight ......8
Removing Thermostat from Wiring
Subbase ................................................9
Programming........................................11
Set or Change Time, Day, etc ..........11
Selecting ˚F/˚C ..................................13
Program Overview ..........................13
Programming with Quickset............15
Review, Change, or Personalize......17
Review or Modify Program ............20
Energy Efficient Recovery (EER™)..21
Programming Filter Monitor ................22
Checking Filter Monitor ....................22
Resetting Filter Monitor....................22
Programming Keypad Lock ..............23
Unlocking Keypad ............................24
Operation ..............................................25
Beginning Programmed
Operation...........................................25
Resetting Thermostat ........................26
Compressor Protection ....................27
Selecting Auto Changeover ............28
24V AC Circuit Power Monitor..............30
LED Indicators........................................30
Changing Dip Switch Settings ..............31
Replacing the Back-Up Batteries ..........32
Cleaning and Repair ............................34
Troubleshooting ..................................35
Warranty................................Back Cover
4
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, or cleaning this thermostat.
■ Read all of the information in this manual before programming this thermostat.
■ This is a 24V AC low-voltage thermostat. Do not install on voltages higher than 30V AC.
■ If you experience a loss of power, this thermostat will indicate “-AC” in the time field of the LCD display. This
means that your system’s 24V AC circuit is not receiving power or is not functioning correctly. The back-up
batteries provided in this thermostat will maintain the programming during the loss of power. However, the
thermostat requires 24V AC power and a functioning system for proper control.
■ 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.
■ This thermostat is equipped with automatic compressor protection to prevent potential damage due to short cycling or
extended power outages. The short cycle protection provides a 5-minute delay between heating or cooling cycles to
prevent compressor damage.
During extended power outages our thermostat provides an extra margin of compressor protection in the heat
mode by delaying the first stage of heating (heat pump) from engaging until the compressor crankcase oil has
been warmed. This will help avoid compressor damage due to improper oil circulation during cold weather
conditions. This important safeguard will delay the first stage of heating (heat pump) for 1 hour less than the
power outage, for up to 12 hours maximum. During this period the system will depend on the auxiliary stages of
heating to maintain the setpoint temperature.
!
5
IMPORTANT SAFETY INFORMATION (CONT.)
■ Do not switch system to cool if the temperature is below 50°F (10°C). This can damage the
cooling system and may cause personal injury.
■ This thermostat is 24V AC powered and requires connection to both sides of transformer for
proper operation. It also requires four charged “AA” ENERGIZER®brand batteries or
equivalent alkaline batteries as a back-up power source. Should the 24V AC circuit be
interrupted temporarily due to a power outage, the battery back-up will maintain all program
information during power outages.
■ Replace back-up batteries every year or when “LO BATT” indicator appears on the thermostat
display.
■ Use this thermostat only as described in this manual.
HELPFUL PROGRAMMING TIPS
■ Make sure the SYSTEM switch is in the HEAT or COOL position before programming.
The thermostat will not allow programming in AUTO or OFF modes. Do not program in
EMER mode.
■ Make sure you set the time of day (note AM/PM indicator) and day of week accurately to
ensure correct operation.
■ The program schedule has a winter (HEAT) and a summer (COOL) program. Both schedules will
use the same time and programmable fan settings, but can have different temperature settings.
If you change the time or programmable fan setting in one program, the opposite program will
change also.
6
SYSTEM
■ The Energy Efficient Recovery (EER™) feature looks ahead up to 2 hours prior to the end of
the set-back (or set-up) period to begin monitoring system performance and calculating
when to turn on the system. It also determines whether the auxiliary heat or cool stages
should be activated prior to setpoint 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 lock out the auxiliary stages until 30 minutes prior to the upcoming setpoint time
to utilize the most energy efficient heat pump (first) stage. The auxiliary stages of heating and
cooling will be available during this lock-out period to maintain the setpoint temperature
should the heat pump not be able to keep up with the heating or cooling demand.
■ To control the system, press the SYSTEM switch until HEAT, COOL, EMER, or AUTO appears
in the display. The thermostat will not properly control the system to your desired setpoint
temperature unless it is in one of these operating modes.
■ The EMER (emergency) mode of heat can be manually selected to bypass heat pump oper-
ation and switch to auxiliary or emergency stages of heating to control setpoint temperature.
■ To enter AUTO, you must first be in PROGRAM mode. Press PROG/MAN button until
PROGRAM appears in display. Then press SYSTEM button to enter AUTO.
■ The QuickSet™ feature programs each individual day simultaneously with the identical
program. Each and every day can then be individually modified to suit specific
needs/desires.
7
HELPFUL PROGRAMMING TIPS (CONT.)
PROG/MAN
SYSTEM
SYSTEM
QUICKSET
NITEVIEW™ LCD DISPLAY BACKLIGHT
This thermostat incorporates a revolutionary new display backlight to make nighttime
temperature or program adjustments quick and easy. The NiteView™ display backlight uses
modern lighting technology to provide an even-flowing light behind the display. There are two
ways to activate the backlight:
1. Every time you press a keypad button or the ∨ or ∧ buttons to make an adjustment, the
backlight will automatically turn on illuminating the display. The backlight will turn off after about
a minute of inactivity.
2. Press the NiteView™ display backlight button located on the top of the thermostat (over the LCD
display). The backlight will turn off after about 15 seconds of inactivity.
NiteView™ light button
SET
MON
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HEAT
PM
AUTO FAN
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PROG/MAN
QUICKSET
LOCK
FILTER
SYSTEM
FAN
INSTALL
BYPASS
8
Your new thermostat can be removed from its wiring
subbase for easy programming, resetting the
thermostat, or changing the batteries. The wiring
subbase will remain attached to the wall.
To remove thermostat from wiring subbase:
1. Press SYSTEM button until OFF is displayed in the
time field.
2. Gently lift the bottom of the thermostat up and out
as shown in Figure 1.
3. Pull thermostat up and away from wiring subbase.
To replace thermostat onto wiring subbase:
1. Align slots on top of thermostat with square pins
on subbase.
2. Latch the top of the thermostat into place. Pivot the
thermostat down and push in to lock the bottom of
the thermostat into place.
Figure 1
REMOVING THERMOSTAT FROM WIRING SUBBASE
9
SYSTEM
AUTO FAN
To replace thermostat onto wiring subbase (cont.):
3. Press SYSTEM button to put the thermostat into HEAT,
COOL, EMER, or AUTO mode. The thermostat will return to
normal operating mode.
You may reset the thermostat at any time. Reset is located on the
back side of thermostat in the lower, right corner. See diagram.
Pressing reset will erase ALL programmed information as well as
time clock and day of week.
10
SYSTEM
RESET
1. Press and hold SET button while pressing PROG/MAN button. Release
both buttons.The display will show the time clock setting:
2. Press either ∨ or ∧ button to adjust the current time forward or
backward. The time will change in one-minute increments each time
you press either button. The time will scroll in 10-minute increments if
you hold down either button. Note AM/PM indicator.
3. Press SET button. The day of the week will appear at the top of the
display.
4. Press either ∨ or ∧ button to change to the current day of the week
(MON, TUE, WED, THU, FRI, SAT, SUN).
11
PROGRAMMING
Set or Change Time, Day, Temp. Differential, and Residual Cooling
NOTE: During programming, the setting to be changed will appear on the display. If no key presses are made within 45
seconds, the display will revert to the main display. Press PROG/MAN button at any time during programming to return to the
main display.
PROGRAMMING
SET
PROG/MAN
SET
PM
MON
PROGRAMMING
12
5. Press SET button. The first stage temperature differential (1˚F)
will appear on the display as 10˚.
6. Press either ∨ or ∧ button to change the first stage temperature
differential. The differential may be adjusted from .5˚F (05˚), 1˚F
(10˚), 1.5˚F (15˚), or 2˚F (20˚). (If your system cycles too often,
increase the temperature differential setting.)
7. Press SET button. The second stage temperature differential
(1.5˚F) will appear on the display as 15˚.
8. Press either ∨ or ∧ button to change the temperature
differential. The differential may be adjusted from 1.5˚F (15˚),
2˚F (20˚), or 3˚F (30˚).
9. Press SET button.
NOTE: If SYSTEM button is in COOL, the display will show ":60." This
is the residual cooling fan delay. If desired, press either ∨ or ∧ button
to adjust the fan delay to ":00", ":30", ":60", or ":90" seconds. Then,
press set button.
SET
SET
SET
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