Emerson 1F97-391 Operating instructions

Thermostat/Humidifier Control
Digital 7 Day Programmable
Comfort-Set®
90 Series
TM
P R E M I U M
1F97-391
Installation and
Operating Instructions
Retain for Future Use
Easy, Menu-Driven Set-Up
and Programming
1 2
3
4
5
6
7
8
9
10
11
12
Premium options
to customize the thermostat
to fit your application.
17
16
15
14 13
INTRODUCTION
Thank you for purchasing your
new Comfort-Set 90 thermostat
and humidifier control. WhiteRodgers has been producing
energy saving controls for over
60 years. We have been designing and producing the ComfortSet family of electronic programmable thermostats since
1982. Comfort-Set 90 is the
third generation of the electronic programmable family.
We believe you will find that
the Comfort-Set 90 is the most
user friendly and technologically advanced thermostat and
humidifier control available
today.
Introduction
You will find information about
thermostat buttons and display
beginning on page 2.
Installation/Configuration
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Installation/Configuration . . . . . . . . . . . . . . . 4
Manual Operation and Programming . . . . 24
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
FAQs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . 42
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Use the tabs at the bottom of the page to quickly
locate sections
1
Programming
Features
FAQs
Troubleshooting
Index
INTRODUCTION
THE THERMOST
AT B
UTT
ONS
THERMOSTA
BUTT
UTTONS
7 Used to adjust the time backward, or to
select the previous menu item.
14 Used to set/reset the filter and
humidity maintenance timer.
8 Used to adjust the time forward, or to
select the next menu item.
15 Sets the system mode (HEATing, OFF,
COOLing, or AUTOmatic changeover).
2 (Red arrow) Raises temperature setting
(99°F or 37°C maximum)
9 Used with TIME FWD /TIME BACK
to set the current day and with HOLD to
enter VACATION mode.
16 Used to adjust the clock one hour
forward or back.
3 The yellow indicator glows when the
system is operating.
10 Used to advance operation to the next
program period.
4 This button (on top of the cover) lights
the display.
11 Used to manually override programming to hold at a selected temperature.
5 Used to initiate or review thermostat
programming.
12 Used to display humidity.
See inside front cover for illustration
showing button locations.
1 (Blue arrow) Lowers temperature
setting (45°F or 7°C minimum)
6 Used with TIME
to set the clock.
FWD
/TIME
BACK
13 Selects fan operation (see The Display,
figure 1 21 ). This button is also used to
program the fan to run continuously during
a program period.
2
17 Used to start or return to program
operation.
LAR
GE LIGHTED (L
CD) DISPLA
Y
LARGE
(LCD)
DISPLAY
menu, the menu item name is shown, one
PR
GM MODE
word at a time (PR
PRGM
MODE, EMR
EMR,
COOL FAN DELA OFF
OFF, etc.).
The thermostat display alternately shows
the current time and the current temperature on the left side. The display also
shows the temperature you have programmed or set on the right side of your
screen.
19 CHECK B
ATTER
Y appears when the
BA
TTERY
“AA” alkaline batteries are weak and
Y appears
should be replaced. BATTER
TTERY
when the thermostat is running on battery
AT appears when
power only. CHECK ST
STA
the thermostat detects certain problems
STEM appears
within itself. CHECK SY
SYSTEM
when the thermostat detects certain
problems in the heating or humidity
system.
18 Displays system mode (HEA
HEA
T , OFF
HEAT
OFF,
O , HOLD
COOL, AUT
UTO
HOLD, VACA or
COOL
HUMD
HUMD). During programming displays the
MOR, D
AY, EVE, NHT
time period (MOR,
DA
NHT)
being programmed. In the configuration
18
19
20
21
CHECK BATTERY
FAN AUTO
HRS
FAN AUTO
HEAT
F
AM
AM
MON TUE WED THU FRI SAT SUN
24
23
HEAT
F
25
MON TUE WED THU FRI SAT SUN
22
Figure 1. The Display
3
Introduction
21 Displays FAN ON when the fan is
operating continuously. Displays FAN
AUT
O when the fan cycles with the
UTO
heating or cooling system.
22 Displays the setpoint temperature. In
HUMD mode, shows humidity setpoint.
23 Alternately displays room temperature
and time of day. In HUMD mode, shows
actual humidity.
24 Shows the current day of the week.
When programming, shows the day(s)
being programmed.
18
CHECK BATTERY
HRS
20 Indicates the length of time remaining
in a temporary hold condition. Also
indicates the length of time remaining in
VACATION mode.
25 The word HEA
T or COOL will appear
HEAT
above or below the setpoint if area 18 is
needed to display other information.
INSTALLATION AND CONFIGURATION
This White-Rodgers Automatic
Setback Digital Thermostat uses
microcomputer technology to provide
precise time, temperature and humidity
control. This thermostat offers the
flexibility to design heating and
cooling programs that fit personal
needs. This thermostat is adaptable to
most 24 Volt residential forced air,
hydronic (hot water or steam), electric
heat systems.
SPECIFICATIONS
Model 1F97-391 7 Day Programming
THERMAL D
ATA
DA
ELECTRICAL D
ATA
DA
Electrical Rating:
17 to 30 VAC, 50/60 Hz
0.05 to 1.5 Amps
1.5 Amps Maximum Total Load
(All terminals combined)
Standard Systems:
Fuel: Gas, Oil, Electric
Type: Heating/Cooling, Heat Only,
Hot Water or Steam Systems, Cool
Only
Setpoint Temperature Range:
45° to 99°F (7° to 37°C)
Setpoint Humidity Range:
10% to 45%
Operating Ambient Temperature:
32° to 110°F (0° to 43°C)
Operating Humidity Range:
90% non-condensing max.
Shipping Temperature Range:
-4° to 131°F (-20° to 55°C)
4
PRECAUTIONS
!
! CAUTION
WARNING
To pr
event electrical shoc
k and/
pre
shock
or equipment dama
ge, discondamag
nect electric po
wer to system a
pow
att
main fuse or cir
cuit br
eak
er bo
x
circuit
break
eaker
box
until installa
tion is complete
complete..
installation
Do not shor
minals on
shortt out ter
terminals
e or primar
y contr
ol to
gas vvalv
alv
alve
primary
control
test. Shor
Shortt or incor
incorrr ect wiring
will dama
ge ther
mosta
damag
thermosta
mostatt and
could cause per
sonal injur
y and/
personal
injury
ge.
or pr
oper
ty dama
damag
proper
operty
Do not use on cir
cuits e
xceeding
circuits
ex
specified vvolta
olta
ge. Higher
oltag
volta
ge will dama
ge contr
ol and
oltag
damag
control
could cause shoc
k or fir
e
shock
fire
hazard.
Ther
mosta
tion
hermosta
mostatt installa
installation
and all components of the
system shall conf
or
m to Class II
confor
orm
cir
cuits per the NEC code
circuits
code..
!
WARNING
Do not wire HM1 or HM2 from
ther
mosta
olts) to HUM on
thermosta
mostatt (24 vvolts)
ignition contr
ol (120 vvolts).
olts).
control
NOTE
Read all instr
uctions thor
oughl
y
instructions
thoroughl
oughly
bef
or
e be
ginning installa
tion.
befor
ore
beginning
installation.
This thermostat is intended for use
with a low voltage system. Do not use
directly on a line voltage system unless
an isolation relay/transformer is
installed.
Do not exceed the ratings shown in the
Specifications section, preceding page.
If in doubt about the electrical ratings
of your heating/cooling system, have it
inspected by a qualified heating and air
5
Installation/Configuration
conditioning contractor or licensed
electrician.
All wiring must conform to local and
national electrical codes and ordinances.
This control is a precision instrument,
and should be handled carefully.
Rough handling or distorting components could cause the control to
malfunction.
INST
ALLA
TION AND CONFIGURA
TION
INSTALLA
ALLATION
CONFIGURATION
ATTENTION!
REMOVE OLD THERMOSTAT
ATTACH BASE TO WALL
This product does not contain mercury.
However, this product may replace a
unit which contains mercury.
Do not open mercury cells. If a cell
becomes damaged, do not touch any
spilled mercury. Wearing nonabsorbent gloves, take up the spilled
mercury with sand or other absorbent
material and place into a container
which can be sealed. If a cell becomes
damaged, the unit should be discarded.
Mercury must not be discarded in
household trash. When the unit this
product is replacing is to be discarded,
place in a suitable container and return
to White-Rodgers at 2895 Harrison
Street, Batesville, AR 72501 for proper
disposal.
Shut off electricity at main fuse or
circuit breaker box until installation is
complete AND the jumper leads (fig.
10, page 17) on the back of the
thermostat are configured properly.
Remove packing material from the
thermostat. Place fingers of one hand
on the center top and bottom portion
of the thermostat. Grasp the base in the
other hand on top and bottom center
and gently pull straight out. Forcing or
prying on the thermostat will cause
damage to the unit.
Remove the front cover of the old
thermostat. With wires still attached,
remove wall plate from the wall.
Identify each wire attached to the
thermostat using one of the labels
enclosed with the new thermostat.
Disconnect the wires from the old
thermostat one at a time. DO NOT let
the wires fall back into the wall.
Install the new thermostat using the
following procedures.
6
Place the base over the hole in the wall
where the wires come out and mark
mounting hole locations base as a
template. Drill 3/16” pilot holes, and
install screw anchors in the wall.
Run wires through hole in base and
attach base to wall (see fig. 2, page 7).
Insert the wires into the terminals on
the base using the appropriate wiring
diagram and tighten the terminal
screws.
CONFIGURING
AND PROGRAMMING
4
Before the power is turned on, the
thermostat must be configured to
operate properly with the system. See
CONFIGURATION on page 16 in this
manual.
2
3
1
S1 S2 S3
HM1 W RH RC G Y
1
HM2 6
1 Mounting screws
2 Pull wires through this opening
3 Insert wires into terminal holes, then tighten screws
4 Screw anchors
Figure 2 – Thermostat base
7
Installation/Configuration
WIRING DIA
GRAMS
DIAGRAMS
All wiring diagrams are for typical systems only. Refer to equipment manufacturers' instructions for specific system wiring
information.
H
HM1
6
Y
G
W
HM2
RC
RH
1
3
2
W
RH
HM1 W RH RC G
E
Y
HM2 6
L
J
I
K
1
From heating system
2 From 24 VAC transformer
3 Red jumper wire (provided)
For humidifier wiring see pages 14-15.
See page 9 for letter identification.
M
NOTE: Ensure that RED RH/RC jumper wire (provided with
thermostat) is connected between thermostat's RH and RC
terminals for proper operation with this system.
Figure 3 – Typical wiring diagram for heating only, single transformer system
8
LETTER IDENTIFICATION FOR WIRING DIAGRAMS
A Humidifier System
H Jumper Wire
L Hot Side
B Zone Valve
I TRANSFORMER
M Neutral Side
C Cooling System
J 24 VAC Side
N HEATING TRANSFORMER
D Fan Relay
K 120 VAC Side
O COOLING TRANSFORMER
E Heating System
P Jumper Wire (field-installed)
9
Installation/Configuration
H
HM1
6
Y
G
W
HM2
RC
RH
1
C
D
E
3
2
W
L
RH
HM1 W RH RC G
J
1 From heating system
2 From 24 VAC transformer
3
Red jumper wire (provided)
4 From fan relay
5 From cool system
For humidifier wiring see pages 14-15.
See page 9 for letter identification.
I
4
G
Y
5
Y
HM2 6
K
M
NOTE: Ensure that RED RH/RC jumper wire (provided with
thermostat) is connected between thermostat's RH and RC
terminals for proper operation with this system.
NOTE: For three-wire heat only system, connect terminals G, W
and RH
RH. For cool only system, connect terminals Y, G and RH
RH.
Figure 4 – Typical wiring diagram for heat only, cool only, & heat/cool single transformer system
10
H
6
HM1
Y
G
W
HM2
RC
RH
1
3
2
4
6 4
5
B
W
1
HM1 W RH RC G
2
J
1
2
6
RH
L
From heating system
From 24 VAC transformer
(through zone valve)
3 Red jumper wire (provided)
4 From zone valve system
For humidifier wiring see pages 14-15.
See page 9 for letter identification.
I
HM2 6
K
M
NOTE: Thermostat must have batteries installed.
NOTE: Ensure that RED RH/RC jumper wire (provided with
thermostat) is connected between thermostat's RH and RC
terminals for proper operation with this system.
Figure 5 – Typical wiring diagram for heat only, three-wire, zone valve system
11
Installation/Configuration
Y
HM1
6
Y
G
HM2
W
RC
RH
1
L
C
D
E
3
2
W
J
I
K
RH
C
R
HM1 W RH RC G
G
Y
4
Y
HM2 6
M
L
J
1
2
3
4
5
From heating system
From 24 VAC heating transformer
From 24 VAC cooling transformer
From fan relay
From cooling system
O
K
M
Figure 6 – Typical wiring diagram for heat/cool, two-transformer system
For humidifier wiring see pages 14-15.
See page 9 for letter identification.
12
5
HM1
6
Y
G
C
D
W
HM2
RH
RC
2
1
L
R
J
I
K
HM1 W RH RC G
M
1 From 24 VAC cooling transformer
2 From fan relay
3
From cooling system
For humidifier wiring see pages 14-15.
See page 9 for letter identification.
Figure 7 – Typical wiring diagram for three-wire cooling system
13
Installation/Configuration
C
G
Y
Y
HM2 6
3
1
HM1
6
Y
G
W
HM2
RC
RH
HM
HM1 W RH RC G
A
Y
HM2 6
L
J
K
I
M
NOTE: Two terminal choices (HM1 or HM2) are provided for
humidifier control. When the humidity setting is higher than the
room humidity:
HM1 turns off the humidifier when the call for heat ends.
HM2 powers the humidifier an additional 30 seconds after the
call for heat ends to provide slightly more humidity output.
1 From humidity system
See page 9 for letter identification.
Most installers will use HM1 unless they feel more humidity is
desirable.
Figure 8 – Typical wiring diagram for 24V humidifier system
14
1
6
HM1
Y
G
W
HM2
RC
RH
HM
HM1 W RH RC G
Y
HM2 6
L
Relay
90-290Q
or equivalent
J
K
I
M
A
K
1
From humidity system
See page 9 for letter identification.
Figure 9 – Typical wiring diagram for 120V humidifier system
15
Installation/Configuration
CONFIGURA
TION
CONFIGURATION
JUMPERS
Before turning power on to the system,
the jumpers on the back of the
thermostat must be configured to
operate correctly with the system
equipment.
This thermostat is configured from the
factory to operate a standard fossil fuel
(gas, oil, etc.), forced hot air system
with a single stage air conditioning
compressor and fan. This is the correct
configuration for any system that
DOES NOT require the thermostat to
energize the fan on a call for heat.
If you have an electric heat or other
system that REQUIRES the thermostat
to control the fan, find and cut the
jumper lead labelled W914 (see fig.
10). This will allow the thermostat to
energize the fan instantly on a call for
heat. If you are unsure if the system
requires the thermostat to control the
fan, contact a qualified heating and air
conditioning service person.
16
A remote sensor can be used with this
thermostat. To use a remote sensor,
jumper W922 must be clipped (see fig.
10) and the REMT SEN option in the
configuration menu must be set to ON.
1
2
W914
W922
1 Clip for remote sense
2 3-pin connector
3 Clip for electric heat
Figure 10 – Jumper locations
17
Installation/Configuration
3
CONFIGURA
TION MENU
CONFIGURATION
The configuration menu allows you to set thermostat operating characteristics to your system or personal requirements.
To enter the menu, press TIME FWD and TIME BACK once at the same time. Press TIME FWD to advance through the
menu options. Press
arrow keys to change options. Either the installer or the operator may change shaded
options. We recommend that other options be set by the installer.
Step
1
Press Button(s)
Displayed (Factory Default)
Press
or
EMR
(ON)
OFF
to select:
COMMENTS
Selects EMR option ON or OFF
See page 32
TIME
TIME
BACK
2
TIME
FWD
SET CYCL HEAT
(05)
02 - 40
Adjusts heat anticipation value (2 through 40)
See page 20
3
TIME
FWD
SET CYCL COOL
(12)
09 - 40
Adjusts cool anticipation value (9 through 40)
See page 20
4
TIME
FWD
COOL FAN DELA OFF
(01)
01 - 127
Adjusts cool fan-off delay (1 through 127 sec.)
See page 20
5
TIME
FWD
COOL FAN DELA ON
(04)
01 - 05
Adjusts cool fan-on delay (1 through 5 sec.)
See page 20
6
TIME
FWD
COMP LOCK
(OFF)
ON
7
TIME
FWD
SYSTEM
(HEAT-OFF-COOL-AUTO)
HEAT-OFF,
COOL-OFF,
HEAT-OFF-COOL
FWD
18
Selects compressor lockout ON or OFF (see NOTE)
See page 21
Selects system switch choices for heat only,
cool only, heat/cool or automatic changeover
See page 21
CONFIGURA
TION MENU (cont’
d)
CONFIGURATION
(cont’d)
Adjusts temperature display higher or lower
See page 32
8
TIME
FWD
0˚F
(0)
5 LO to
5 HI
9
TIME
FWD
(˚F)
˚C
10
TIME
FWD
BEEP
(ON)
OFF
Turns beeper ON or OFF
11
TIME
FWD
REMT SEN
(OFF)
ON
Selects remote sensor OFF or ON
See page 21
12
TIME
FWD
PART LOCK
(OFF)
ON
Selects partial keypad lockout OFF or ON
See page 34
13
TIME
FWD
LOCK
(OFF)
ON
Selects total keypad lockout OFF or ON
See page 34
14
TIME
FWD
RH
20 LO to
20 HI
Adjusts humidity display higher or lower
See page 36
15
TIME
FWD
DRY
(0)
HI - LO
Selects programmable automatic humidity reduction
See page 37
16
PROGRAM
Adjusts temperature display to ˚F or ˚C.
Returns to normal operation
RUN
NOTE: COMP LOCK OFF permanently defeats the compressor lockout. Turn this feature off only if the system already
provides for compressor short-cycle protection.
19
CONFIGURA
TION
CONFIGURATION
ADJUSTABLE ANTICIPATION
This option allows the cycle times in
heating and cooling to be increased or
decreased. The factory set values can
be adjusted higher for longer cycles or
lower for shorter cycles.
The adjustment range for HEATING is
from 2 to 40. The factory preset is 5.
The adjustment range for COOLING
is from 9 to 40. The factory preset is
12. The recommended initial setting
for hydronic (hot water or steam)
systems is 35.
The cooling will not go below 9
because compressors require a longer
cycle.
The chart below shows how this
adjustment range affects thermostat
performance.
HEATING
COOL FAN-ON
AND FAN-OFF DELAY
This option allows a selection of a fanon delay of 1 to 5 seconds on a call for
cool and 1 to 127 seconds of fan-off
delay after the thermostat has satisfied
the call for cool.
A short delay to allow the A-coil to
cool off before the fan turns on may be
preferred. This also allows the
COOLING
Anticipation Value
Cycle Length
Differential Temperature Cycle Length Differential Temperature
2–8
Shorter
0.4–0.6˚F (0.2–0.3˚C)
N/A
N/A
9–20
Longer
0.6–1.0˚F (0.3–0.6˚C)
Shorter
0.6–1.0˚F (0.3–0.6˚C)
21–40
Hydronic
1.0–1.6˚F (0.6–0.9˚C)
Longer
1.0–1.6˚F (0.6–0.9˚C)
These numbers are approximate and represent operation with a typical system. Actual temperature differentials and run
times may vary widely based on your building and equipment, as well as outdoor temperature conditions.
20
CONFIGURA
TION
CONFIGURATION
compressor and the fan to come on at
slightly different times, which allows
full power to the compressor on start
up.
The fan off delay allows the fan to
continue running after the compressor
has shut off. This distributes the
cooling that would otherwise stay
trapped in the air conditioning coils
through the ducts. Ideally the timing
would be set so the fan shuts off just as
the cool air is exhausted. If this timing
is set too long the fan may begin
blowing warm air before it shuts off.
Shortening the fan-off delay will
prevent this.
COMPRESSOR LOCKOUT
This thermostat is designed with an
optional compressor lockout feature.
It is designed to protect the system
against premature compressor failure
by “locking out” the compressor for at
least five minutes after each cycle.
When the thermostat is in compressor
lockout, the word COOL will flash on
the display. During this period, the
compressor will not be energized.
Selecting COMP LOCK ON in the
configuration menu (page 18, step 6)
will enable this feature.
DISABLING HEAT, COOL,
OR AUTO MODES
The automatic changeover feature of
this thermostat can be disabled
(automatic changeover allows the
thermostat to switch between heating
and cooling to maintain temperature).
If this thermostat is controlling a
heating-only or cooling-only system,
the heat, cool, or auto modes can be
disabled.
21
Installation/Configuration
Lockout Bypass Option
FOR QUALIFIED SERVICE
TECHNICIANS’ USE ONLY.
HOMEOWNERS SHOULD
NOT USE THIS FEATURE
DUE TO POSSIBILITY OF
EQUIPMENT OR PROPERTY
DAMAGE, OR PERSONAL
INJURY.
To override this feature for one
cycle while testing thermostat
operation, press SET TIME and
SET DAY buttons at the same
time.
OPTIONAL REMOTE
TEMPERATURE SENSE
An optional remote sensor (part #
F145-1328) can be attached to this
thermostat and may be wired as far
CHECK THERMOST
AT OPERA
TION
THERMOSTA
OPERATION
away as 300 feet. The thermostat will
use the temperature in the remote
location as its room temperature
display.
This is an excellent feature if the
thermostat is in a poor location for
sensing temperature or the thermostat
is in a separate room to prevent
tampering.
NOTE
The remote sense feature will not
work if the system does not provide
24V to the thermostat (example:
heating-only system or 3-wire zone
valves).
To use a remote sensor, jumper W922
must be clipped (see figure 10) and
the REMT SEN option in the configuration menu (on page 19) must be set
to ON.
After the thermostat is installed and
configured, do the following to ensure
proper operation.
FAN OPERATION
If your system does not have a G
terminal connection, skip to “Heating
System” section.
1. Turn power on to the system.
2. Press FAN until FAN ON is
displayed. The fan should begin to
operate.
3. Press FAN until FAN AUT
UTO
O is
displayed. The fan should stop
operating.
HEATING SYSTEM
1. Press SYSTEM until HEA
HEAT
T is
displayed. If the heating system has
a standing pilot, ensure that it is lit.
2. Press
to adjust thermostat
22
setting above room temperature.
The heating system should begin to
operate.
3. Press
to adjust temperature
below room temperature. The
heating system should stop
operating.
HUMIDIFIER OPERATION CHECK
NOTE: Humidifier will only operate
when the furnace is running.
T is
1. Press SYSTEM switch until HEA
HEAT
displayed.
2. Press
until the setpoint is
above the room temperature by a
few degrees and the furnace starts
running.
3. Press HUMIDITY % . The display
will show the current humidity
level in the room and the current
humidity setpoint for approximately 10 seconds.
4. To check humidifier, press
to
CHECK THERMOST
AT OPERA
TION (cont’
d.)
THERMOSTA
OPERATION
(cont’d.)
HUMIDIFIER OPERATION
CHECK (cont’d.)
raise the humidity setpoint (45%
maximum) above the room humidity level. The humidifier should
operate. If the humidity in the room
is above 45%, press
to adjust
the setting to 45% (the maximum
setting) and hold the up arrow in
for 5 seconds. The display will read
ON and the humidifier will operate.
This test will last for one heat cycle.
The humidifier will then operate
when the heat is running to
maintain your humidity setting.
COOLING SYSTEM
!
WARNING
To prevent compressor and/or
property damage, if the outdoor
temperature is below 50°F
(10°C), DO NOT operate the
cooling system.
1. Press SYSTEM until COOL is
displayed.
2. Press
to adjust thermostat
setting below room temperature.
The fan should come on (after the
fan-on delay time, if any), followed
by cold air circulation. There may
be a 5 minute delay on compressor
operation.
3. Press
to adjust temperature
setting above room temperature.
The cooling system should stop
operating, and the fan should stop
running (after the fan-off delay
time, if any).
RESETTING THERMOSTAT
The thermostat can be reset back to
factory default programs and configuration options. Removing power from
the thermostat will not reset it to the
default settings. Before resetting the
Installation/Configuration
23
thermostat, you may want to make
note of the previously selected
configuration options and programming.
To reset the thermostat, press and
release PROGRAM RUN , then press
the FAN , TIME BACK and
buttons at the same time. This will
reset the thermostat to factory default
programs and configuration. The
display will momentarily go blank,
then all segments on the display will
momentarily be shown. The thermostat
will then go into the HOLD mode and
will maintain factory preset temperatures.
PROGRAMMING
MANU
AL OPERA
TION
MANUAL
OPERATION
(Bypassing the Pr
o g ram)
Pro
Your Comfort-Set 90 thermostat can
be used to control temperature
manually (without programming).
For manual operation, press SYSTEM
T or COOL
to select HEA
HEAT
COOL, then press
PROGRAM HOLD . Use
or
to set the temperature as
desired.
PR
OGRAMMED OPERA
TION
PROGRAMMED
OPERATION
Planning Your Pr
o g ram
Pro
The sample schedule (pages 26 & 27)
shows the factory installed programs
for heating and cooling. The heating
and cooling programs are separate, and
must be programmed individually. To
use the factory program, set the clock
and press PROGRAM RUN with the
thermostat SYSTEM set to Hea
Heatt ,
Cool
Cool, or Auto
uto.
Fill out the blank schedules (pages 28
& 29) with the time and temperatures
you want in your program. Fill in
every space for your program.
The same temperature can be repeated
more than once if you do not want the
temperature to change over several
time periods. This is useful for homes
or businesses that are occupied all day
and only want a setback temperature at
night.
Entering Your Pr
Pro
o g ram
k:
Clock
To Set the Cloc
1. Press PROGRAM
RUN
.
2. Press SET TIME . The display will
show the hour. Use TIME FWD or
TIME BACK to set to the current hour
and AM/PM designation.
24
3. Press SET TIME again. The
display will show minutes. Use TIME
FWD or TIME BACK to set to the
current minutes.
4. Press PROGRAM
RUN
.
To Set the Da
y:
Day
5. Press SET DAY . The display will
indicate a day of the week. Use TIME
FWD or TIME BACK to set to the
current day of the week.
6. Press PROGRAM
RUN
.
o g ram
To Set the Pr
Pro
am:
T (for
HEAT
7. Press SYSTEM to select HEA
heating program) or COOL (for
cooling program).
8. Press PROGRAM VIEW one time.
The display will show MOR and the
settings for time and temperature.
9. If you program Monday the first
time you press PROGRAM VIEW it
will be copied to the rest of the week.
To program the other days of the week
press ADV. /DAY until you reach the
day you wish to change and follow
Steps 10, 11 & 12. You can also copy
the program from one day to another.
To copy, press HOLD /COPY. The
display will show COPY, and all the
other days of week will be flashing.
Press HOLD /COPY again to copy the
day in to the rest of the week or press
TIME FWD or TIME BACK until
you reach the day you want to copy to
and press HOLD /COPY.
10.Press TIME FWD or TIME BACK
to set the time on the display as
selected in your HEATING or
COOLING Schedule. Be sure to
check the AM or PM on the display.
11.Press the red
or blue
button to adjust the temperature to
match your schedule. If you want the
fan ON continuously during this
period, press FAN .
12.Press PROGRAM VIEW one time.
MOR on the display will change to
DAY. Repeat steps 10 and 11 to enter
time and temperature for this period.
25
Programming
13.Press PROGRAM VIEW to
continue through the entire schedule,
entering time and temperature for each
period. When you are satisfied that
your program matches your schedule,
press PROGRAM RUN . Programming is now complete for this mode
and your program is running.
14.To program the other mode, repeat
the procedure from step 6.
7 Day Sample HEAT Program Schedule
(Shows factory programming)
1
1
2
3
5
6
5
6
5
6
5
6
MON
6:00 AM
70°F (21°C)
8:00 AM
62°F (16°C)
5:00 PM
70°F (21°C)
10:00 PM
62°F (16°C)
TUE
6:00 AM
70°F (21°C)
8:00 AM
62°F (16°C)
5:00 PM
70°F (21°C)
10:00 PM
62°F (16°C)
WED
6:00 AM
70°F (21°C)
8:00 AM
62°F (16°C)
5:00 PM
70°F (21°C)
10:00 PM
62°F (16°C)
THU
6:00 AM
70°F (21°C)
8:00 AM
62°F (16°C)
5:00 PM
70°F (21°C)
10:00 PM
62°F (16°C)
FRI
6:00 AM
70°F (21°C)
8:00 AM
62°F (16°C)
5:00 PM
70°F (21°C)
10:00 PM
62°F (16°C)
SAT
6:00 AM
70°F (21°C)
8:00 AM
62°F (16°C)
5:00 PM
70°F (21°C)
10:00 PM
62°F (16°C)
SUN
6:00 AM
70°F (21°C)
8:00 AM
62°F (16°C)
5:00 PM
70°F (21°C)
10:00 PM
62°F (16°C)
Morning (MOR)
2 Day (DAY)
3 Evening (EVE)
4
4
Night (NHT)
5 Start Time
6 Temperature
26
7 Day Sample COOL Program Schedule
(Shows factory programming)
1
5
1
2
6
5
3
6
5
6
5
6
MON
6:00 AM
78°F (25°C)
8:00 AM
85°F (29°C)
5:00 PM
78°F (25°C)
10:00 PM
82°F (27°C)
TUE
6:00 AM
78°F (25°C)
8:00 AM
85°F (29°C)
5:00 PM
78°F (25°C)
10:00 PM
82°F (27°C)
WED
6:00 AM
78°F (25°C)
8:00 AM
85°F (29°C)
5:00 PM
78°F (25°C)
10:00 PM
82°F (27°C)
THU
6:00 AM
78°F (25°C)
8:00 AM
85°F (29°C)
5:00 PM
78°F (25°C)
10:00 PM
82°F (27°C)
FRI
6:00 AM
78°F (25°C)
8:00 AM
85°F (29°C)
5:00 PM
78°F (25°C)
10:00 PM
82°F (27°C)
SAT
6:00 AM
78°F (25°C)
8:00 AM
85°F (29°C)
5:00 PM
78°F (25°C)
10:00 PM
82°F (27°C)
SUN
6:00 AM
78°F (25°C)
8:00 AM
85°F (29°C)
5:00 PM
78°F (25°C)
10:00 PM
82°F (27°C)
Morning (MOR)
2 Day (DAY)
3 Evening (EVE)
4
4
Night (NHT)
5 Start Time
6 Temperature
27
Programming
7 Day Personal HEAT
Program Schedule
1
5
2
6
5
3
6
5
MON
TUE
WED
THU
FRI
SAT
SUN
1
Morning (MOR)
2 Day (DAY)
3 Evening (EVE)
4
Night (NHT)
5 Start Time
6 Temperature
28
4
6
5
6
7 Day Personal COOL
Program Schedule
1
5
2
6
5
3
6
5
MON
TUE
WED
THU
FRI
SAT
SUN
1
Morning (MOR)
2 Day (DAY)
3 Evening (EVE)
4
Night (NHT)
5 Start Time
6 Temperature
29
Programming
4
6
5
6
FEATURES
Thermostat Features:
Pushbutton Backlight --------------- 31
Factory Preprogramming ----------- 31
Arm Chair Programming ----------- 31
Temporary Program Override ------ 31
Indefinite Program Hold
(Bypassing the Program) -------- 31
Selectable Energy Management
Recovery (EMR) ----------------- 32
Automatic Heat/Cool
Changeover ------------------------ 32
Adjustable Temperature Display -- 32
Programmable Fan Control -------- 33
Programmable Vacation
Time Temp ------------------------ 33
Daylight Savings Time Button ---- 33
Battery Back-up --------------------- 33
Keypad Lockout --------------------- 34
Thermostat Start-up after
Power Loss ------------------------ 34
Compressor Short Cycle
Protection -------------------------- 35
Air Filter Change-Out Indicator --- 35
System and Thermostat
Diagnosis -------------------------- 35
30
Humidistat Features:
Adjustable Humidity Display ------ 36
Humidifier Maintenance
Indicator --------------------------- 36
Humidifier Control and
Monitoring ------------------------ 37
Programmable Automatic
Humidity Reduction ------------- 37
Pushb
utton Bac
klight
Pushbutton
Backlight
The large numbers and letters on your
LCD screen make it easy to see. In low
light conditions, press the button on
top of the thermostat and the display
will light up for three seconds. For ten
minutes after pressing the light button,
pressing any other button will light the
display for ten seconds. The display
light uses power from the 3 “AA”
alkaline batteries installed. Excessive
use of the display light will reduce
battery life.
Factor
y Pr
e pr
o g ramming
actory
Pre
pro
This thermostat has been programmed
at the factory. The chart in the
programming examples section lists
these factory settings. If the times and
temperatures are the same as your
schedule, you may simply run the
factory installed program by pressing
PROGRAM RUN .
Ar
m Chair Pr
o g ramming
Arm
Pro
amming..
The thermostat uses 24 VAC power
supplied by the system for normal
operation. However, if the installed
“AA” batteries are providing sufficient
power, you can program the thermostat
away from the wall. If the thermostat
indicates low battery power (CHECK
BATTERY), refer to the Battery Backup feature (page 33).
Tempor
ar
y Pr
o g ram Ov
er
ride
emporar
ary
Pro
Over
erride
ride..
Any time your program is running and
you would like to override it for a
specific amount of time, press
or
until the temperature you
want is displayed. The display will
indicate HOLD, and the number of
hours remaining in the hold period will
be indicated with the word HRS. To
adjust the length of time for the
override, press TIME FWD or TIME
BACK . HOLD TILL will be displayed
as well as the HOLD period expiration
31
Features
time. Press TIME FWD or TIME
BACK buttons until you reach the time
you would like it to resume the
program. The TIME FWD or TIME
BACK buttons adjust the time in 15
minute increments. This programmed
hold time has a 19 hour maximum and
15 minute minimum. Beyond 19 hours
you may wish to use the vacation hold
feature (page 33). If you need to, you
can adjust the temperature up or down.
Indefinite Pr
o g ram Hold.
Pro
If you want to operate the thermostat
to keep a set temperature without a
program running, press PROGRAM
HOLD . The
or
buttons
can be used to raise or lower the
temperature. The thermostat will hold
the set temperature until you return to
the program by pressing PROGRAM
RUN .
Selecta
ble Ener
gy
Selectab
Energ
Mana
gement R
eco
ver
y (EMR)
Manag
Reco
ecov
ery
EMR causes the thermostat to start
operating the system early in order to
make the building temperature reach
your program setpoint at the time you
specify. In heating, the thermostat will
start 5 minutes early for every 1°F
difference between the room temperature and the next programmed
temperature. In cooling, the thermostat
uses 15 minutes per °F.
EXAMPLE: If the temperature in the
room is 65°F and the thermostat is
programmed for 70°F at 7 AM, the
thermostat will start approximately 25
minutes early. The difference between
the room temperature (65°F) and the
setpoint (70°F) is 5°. 5° X 5 minutes
per °F = 25 minutes. The setpoint on
the display will actually change to
display 70° about 25 minutes early.
The maximum time the thermostat can
start early in heating is 75 minutes.
The maximum time the thermostat can
start early in cooling is 3 hours and 45
minutes. Cooling can start earlier
because it takes longer for cooling
systems to reach the desired temperature.
To select or deselect this feature, refer
to the CONFIGURATION section
(page 18, step 1).
Automa
tic Hea
t/Cool Chang
eo
ver
utomatic
Heat/Cool
Changeo
eov
If you have a heating/cooling system,
the thermostat can be set to automatically switch the system from heating to
cooling as needed. To set your
thermostat to this operating mode,
press SYSTEM button until AUTO is
displayed on the screen.
and
buttons
Pressing the
at the same time will change the
setpoint temperature displayed to the
32
setpoint of the other mode. This will
allow you to modify both the HEAT
and COOL setpoints to accommodate a
HOLD condition while in Automatic
Changeover mode. To adjust, refer to
the Configuration section (page18,
step 7).
Adjusta
b le Temper
a tur
e Displa
y
Adjustab
empera
ture
Display
The room temperature display can be
adjusted to read higher or lower by
following the configuration menu and
adjusting the temperature to a higher
or lower value. The thermostat is
calibrated at the factory to display a
very accurate room temperature, but
due to various conditions and/or
personal preference, you may wish to
adjust the thermostat display higher or
lower (up to 5°F). For example, if the
thermostat displays a room temperature of 70° but you want it to display
73°, you can adjust it. To adjust, refer
to the CONFIGURATION section
(page 19, step 8).
Pr
o g ramma
b le F
an Contr
ol
Pro
ammab
Fan
Control
This feature allows you to have your
fan operate continuously through one
or more programmed time periods.
This is useful if you want constant air
circulation in your location during a
specific time period. If you do not use
this feature, the fan will cycle normally
with the heating and cooling system.
Pr
o g ramma
b le Vaca
tion Time/
Pro
ammab
acation
Temper
a tur
e Oper
a tion.
empera
ture
Opera
The VACATION mode allows you to
program the thermostat to hold a
constant temperature for 1 to 29 days.
At the end of the day and time you
select, the thermostat will return to
normal program operation.
To program the number of days, press
HOLD then press SET DAY . VACA
HOLD TILL will be displayed. The
display will also show DAYS
(flashing) and the number 5. To
change the number of vacation days,
press TIME FWD or TIME BACK .
Press
or
to set the
temperature you wish to maintain
while away. While still in the vacation
mode, set the time you want the
program to resume by pressing SET
TIME once. The current time will
display. Press TIME FWD to adjust
the time in 15 minute increments. You
may wish to select a few hours in
advance of your expected return to
allow time to reach the desired
temperature. Your thermostat is now
programmed to hold the temperature
you selected through your vacation for
HEAT, COOL, or AUTO.
After 20 seconds the display will
return to time/temperature alternation,
and will display VACA. Pressing SET
DAY again will activate the vacation
mode settings. Pressing PROGRAM
RUN cancels this feature and begins
33
Features
running your normal program.
Da
ylight Sa
vings Time Button.
Daylight
Savings
One button adjustment allows you to
change your thermostat clock between
Standard Time and Daylight Savings
time. Simply push the DAYLIGHT
SAVINGS TIME button to advance
the time forward one hour in the
Spring. In the Fall, press the DAYLIGHT SAVINGS TIME button
twice to fall back an hour. If you push
it three times in a row (in less than 30
seconds) it will return to the original
time setting. After clock adjustment,
press PROGRAM RUN to resume
your normal program.
Ba
tter
y Bac
k-Up
Batter
ttery
Back-Up
k-Up..
Three “AA” alkaline batteries allow
the thermostat to maintain its program
in the event of a power loss. They also
operate the back light for viewing the
display in low light conditions, and
allow for armchair programming.
CHECK BATTERY will be displayed
when the batteries are low. To assure
optimum performance, change
batteries once a year or when CHECK
BATTERY is displayed. When
changing batteries, always replace all
three batteries with new “AA” alkaline
batteries (for optimum performance,
we recommend Energizer® batteries).
If the batteries must be changed
frequently, it may indicate a problem
with the system. Contact the heating/
cooling system manufacturer or a
service person. Remember that
excessive use of the display light will
reduce battery life.
Keypad Loc
kout.
Lock
This security feature allows you to
lock out the keypad to prevent
unauthorized tampering with the
program. Two levels of security are
available, Total Keypad Lockout or
Partial Keypad Lockout. Total Keypad
Lockout renders all buttons inoperative. Partial Keypad Lockout allows
only the
or
to operate for
temporary temperature overrides. It
also limits the temperature to the
maximum heating and minimum
cooling temperatures used in your
program. This is especially useful in
buildings where unscheduled events
are common. Anyone can change the
temperature, but only between the
temperatures you set and only for two
hours or the number of hours you
specify if you set up your Hold Till
timing (see Temporary Program
Override, page 31). To select or
deselect this feature, refer to the
CONFIGURATION section (page 19,
steps 12 and 13).
34
tup
Ther
mosta
hermosta
mostatt Star
Startup
After Total P
o wer Loss
Po
Loss..
On installation, or when power is
restored after a total power loss to the
thermostat, your thermostat will
automatically maintain a heating
temperature of 62°F (16°C) and a
cooling temperature of 85°F (29°C). A
total loss of power will occur when
you lose 24 VAC power to the
thermostat, and you have no battery
backup. If this happens, the thermostat
display will go blank in about one
minute after power loss.
When power is restored, the thermostat
will automatically return to the
temperatures listed above. If this
happens, set the clock and day of the
week (use steps 1 through 6 from
“Entering Your Program”, page 24),
then select HEAT, COOL or AUTO
using the SYSTEM . button, and press
PROGRAM RUN to resume operation
with your previously set program.
Compressor
Shor
t-Cy
c le Pr
otection.
Short-Cy
t-Cyc
Protection.
Your thermostat can be configured to
protect your system against premature
compressor failure by “locking out”
the compressor. This ensures that the
compressor will stay off for at least
five minutes on each cycle. When the
thermostat is in compressor lock-out,
the word COOL will flash. During this
period, the compressor will not be
energized. See installation and
configuration, page 18, step 6.
Air Filter
Chang
e-Out Indica
tor
Change-Out
Indicator
tor..
This feature allows the thermostat to
display the words CHNG FLTR
(change filter) after a set time of fan
operation. This is a reminder to change
or clean your air filter. The factory set
interval for CHNG FLTR to be
displayed is 200 hours of fan operation. This can be set anywhere from 0
to 1950 hours in 25 hour increments. A
selection of 00 will cancel this
feature.
When CHNG FLTR is displayed, you
can clear it by pressing the HUM/
FLTR SERVICE button. This resets
the timer and starts counting the hours
until the next filter change.
The following steps will allow you to
change the number of hours for filter
change-out.
1. If you see CHNG FLTR on the
display, press the HUM/FLTR
SERVICE button once to reset the
timer. If you do not see CHNG FLTR
proceed to step 2.
On a 7–Day thermostat, when the
HUM/FLTR SERVICE button is
pressed twice, the display will show
the number of hours remaining before
CHNG FLTR indicator will display.
35
Features
2. Press the HUM/FLTR SERVICE
button. The display will show SET
FILTER TIME and will show the
number of hours to filter change.
3. Press TIME FWD or TIME BACK
to change the time to your requirements.
4. Press PROGRAM RUN to return
to the normal operating mode.
NOTE: If unsure what interval to use
between filter changes or cleaning,
contact the manufacturer of your
heating/cooling equipment.
System and
Ther
mosta
gnostics
hermosta
mostatt Dia
Diagnostics
gnostics..
The display will indicate CHECK
SYSTEM if the room temperature
does not rise within two hours of the
call for heat. After two hours the
thermostat will quit calling for heat for
one minute (this allows some furnaces
to reset) and call for heat again. It will
repeat this sequence three times. If the
temperature still does not rise, it will
continue to call for heat. This normally
indicates the heating system is not
working correctly. You may wish to
consult your furnace manufacturer or
service person.
The display will indicate CHECK STAT
if one of the following occurs.
• One of the buttons is stuck down or
in. Check buttons, make sure nothing
is pushing them in.
• The thermostat sensor is not
functioning. If using a remote sensor,
check connections, wiring and power.
• The humidity sensor is not functioning.
After checking the above, press
PROGRAM RUN to reset the
display. If this does not clear the
display, disconnect power and remove
the batteries for five minutes.
If these checks fail to solve the
problem, the thermostat should be
replaced.
be set anywhere from 0 to 1975 hours
in 25 hour increments. A selection of
00 will cancel this feature.
Adjusta
b le Humidity Displa
y.
Adjustab
Display
The room humidity display can be
adjusted to read higher or lower by
following the configuration menu and
adjusting the humidity to a higher or
lower value (up to 20% RH). The
sensed humidity is calibrated at the
factory. If you want to adjust it, refer
to the CONFIGURATION section
(page 19, step 14).
When CHCK HUMD is displayed,
you can clear it by pressing HUM/
FLTR SERVICE button. This resets
the timer and starts counting the hours
until the next humidifier maintenance.
Humidifier
tor
Maintenance Indica
Indicator
tor..
This feature allows the thermostat to
display the words CHCK HUMD
(check humidifier) after a set time of
humidifier operation. This is a
reminder to maintain or clean your
humidifier. The factory set interval for
CHCK HUMD to be displayed is 100
hours of humidifier operation. This can
36
The following steps will allow you to
change the number of hours for
humidifier maintenance.
1. If you see CHCK HUMD on the
display, press the HUM/FLTR
SERVICE button once to reset the
timer. Also display will show SET
HUMD TIME and will show the
number of hours to humidifier
maintenance.
2. Press TIME FWD or TIME BACK
to change the time to your requirements.
3. Press PROGRAM RUN to return
to the normal operating mode.
Humidifier Control
and Monitoring
When humidity key is pressed in the
run mode the actual humidity will be
displayed on the left side of the
display. HUMD is displayed above the
actual humidity. The humidity set
point is displayed on the right side of
the display.
or
key may be pressed to
modify the humidity set point.
Maximum displayed humidity is 80%
RH and minimum displayed humidity
is 10% RH. If the heating system is
operating and there is a demand for
humidity, then the humidifier will
operate.
If the demand for humidity is not
satisfied for ten consecutive heat cycle
operations, the display will show the
word HUMD for one second and the
word MX for one second signaling
maximum possible humidity is reached
with respect to the humidifier’s
capability.
Pr
o g ramma
b le Automa
tic
Pro
ammab
utomatic
Humidity R
eduction.
Reduction.
This feature automatically lowers
humidity when the outside temperature
drops. This is to prevent the interior
windows/walls from reaching the dew
point where water condenses on
surfaces. To achieve automatic
humidity reduction, the thermostat
lowers the humidity when furnace
cycles are long. When the furnace runs
shorter cycles, it increases humidity.
For suggested settings see table below.
HI
If your window insulation is poor, you
need high humidity reduction. If your
window insulation is good, you need
low humidity reduction (factory
setting).
To adjust this feature, refer to the
CONFIGURATION section (page 19,
step 15). Selection of 0 will cancel this
feature.
0
Poorly insulated homes or homes with a lot of condensation on
windows/walls
Factory default – no humidity reduction
LO
Well insulated homes requiring little humidity reduction
37
Features
FAQs
1F97-391
1. My thermostat is reading
in Celsius. How do I change
it to Fahrenheit?
Press PROGRAM RUN to make certain the thermostat is in the run program mode, then
press TIME FWD and TIME BACK at the same time to enter the configuration menu.
WN arrow to select °F,
Press TIME FWD until you get to °C then press the UP or DO
DOWN
press PROGRAM RUN to return to normal operation.
2. The display shows the
Y.
ATTER
TTERY
word CHECK B
BA
What does it mean?
Y symbol
ATTER
Y on the digital display indicates low batteries. The BATTER
CHECK B
TTERY
TTERY
BA
(not blinking) indicates a loss of power (24 volts) from the heating and cooling equipment
to the thermostat, or that the thermostat is operating on battery power only.
3. How do I bypass (not use)
the program?
STEM
To bypass the program and operate the thermostat manually press the MODE SY
SYSTEM
button to select Heat or Cool (whichever you prefer) and press HOLD
HOLD. Use the Temp Up
wn buttons to set the thermostat on the temperature you want. The temperaor Temp Do
Down
ture setting you choose will be held until you manually change it using the Temp Up or
wn buttons. The thermostat will remain in the HOLD mode when you change
Temp Do
Down
temperature and maintain whatever temperature you set. If you decide to return to the
program, press PROGRAM RUN to cancel the hold feature.
4. What functions do the
connecting terminals have on
the subbase?
Typical terminals and functions:
HM1=Humidifier System
6=Zone Valve
G=Fan Relay
W=Heating System
RC= Power (Cooling)
RH=Power (Heating)
38
Y=Cooling System
HM2=Humidifier System
FAQs
1F97-391
5. My furnace (air conditioning) cycles too fast (slow). Is
there an adjustment?
The 1F97-391 has a feature called Adjustable Heating and Cooling Cycle times (also
called Anticipation) that allows you to increase or decrease the cycle times in heating and
cooling. This is useful if you think your cycle times are too long or too short. The higher
the number you select, the longer the cycle. The lower the number you select, the shorter
the cycle. The 1F97-391 is adjusted in the configuration menu (see your installation
instructions). The range of adjustment for HEATING is from 2 to 40. The factory Preset is
5. The range of adjustment for COOLING is from 9 to 40. The factory Preset is 12. The
cooling will not go below 9 because compressors require a longer cycle. See page 20.
6. Why does the blower fan
keep running after the system
has shut off?
Normally the blower will turn off within a few minutes after the call for heat or cool. The
blower running after the system shuts off may indicate (1) the thermostat is set to FAN
ON
ON, (2) the fan has been programmed to run at that time period or (3) something has
damaged the thermostat or equipment. If the thermostat display indicates FAN ON
ON, press
O , meaning the fan will cycle only with the
the fan button once to set it to FAN AUT
UTO
GF
AN (Program Fan), sometime during programequipment. If the display indicates PR
PRG
FAN
GF
AN (Program Fan), check all of the
ming, the FAN button was pushed. To remove PR
PRG
FAN
GF
AN
programmed times and temperatures. When you encounter PR
PRG
FAN
AN, press the FAN
button to remove it from that time period in the program. As a final test, set the thermostat
O is not displayed. If the fan continues to run,
to OFF
OFF. Verify that FAN ON or FAN AUT
UTO
you may want to contact your heating and cooling service person for assistance.
39
FAQs
FAQs
1F97-391
7. Do I have to program a
stop time for each program
period?
There is no need to select a time to stop a programming period. Starting a new programming period will stop the previous program period.
8. My display light does not
work. Can it be fixed or
replaced?
The display light in the 1F97-391 is not a replaceable item. The display light uses power
from the batteries. If batteries are good, a replacement thermostat would be indicated.
9. Between Heating and
Cooling seasons, I want to
turn my system off. Will this
change the program?
STEM button until the
Any time you wish to turn your system off, simply press SY
SYSTEM
display shows OFF
OFF. This will not affect your thermostat’s programming in any way. To
STEM button until HEA
T , OFF
O is
turn the system back on, press SY
SYSTEM
HEAT
OFF, COOL
COOL, or AUT
UTO
displayed and press RUN. The system will begin operating according to the current
thermostat program.
10. Do I have to reprogram
my thermostat after I change
the batteries?
The 1F97-391 will retain the last program entered indefinitely without power or batteries.
40
FAQs
1F97-391
11. How can I get an extra
copy of the Operating
Manual for my thermostat?
Visit our website at www.white-rodgers.com for operating manuals.
12. What do I do if my
system is not working
properly and I need service?
Contact a Local Heating & Cooling service person or visit our website at
www.white-rodgers.com to consult our “Where to Buy” Service/Dealer locator.
13. What does CHCK
HUMD on the display mean
and how do I reset it?
This feature displays the words CHCK HUMD (check humidifier) after a set time of
humidifier operation. This is a reminder to maintain or clean your humidifier. When
CHCK HUMD is displayed, you can clear it by pressing the HUM/FL
TR SER
VICE
HUM/FLTR
SERVICE
button.
14. When I push the
Humidity button, it displays
HUMD MX
MX. What does this
mean?
HUMD MX indicates the humidifier has not reached the current humidity setting in the
last 10 heating cycles. If the condition persists, a service person may recommend additional humidifier capacity.
41
FAQs
TROUBLESHOOTING
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
No Heat/No Cool/No Fan
(common problems)
1. Blown fuse or tripped circuit
breaker.
2. Furnace power switch to OFF.
3. Furnace blower compartment
door or panel loose or not
properly installed.
Replace fuse or reset breaker.
1. Pilot light not lit.
2. Thermostat not set to Heat.
Re-light pilot.
STEM button until Heat is displayed
Press the SY
SYSTEM
and raise temperature above room temperature.
Verify thermostat and system wires are securely
attached.
Many furnaces have safety devices that shut down
when a lock-out condition occurs. If the heat works
intermittently, contact the furnace manufacturer or
local service person for assistance.
No Heat
3. Loose connection to thermostat
or system.
4. Furnace Lock-Out Condition.
Heat may also be intermittent.
42
Turn switch to ON.
Replace door panel in proper position to engage
safety interlock or door switch.
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
No Heat (cont.)
5. Heating system requires
service or thermostat requires
replacement.
STEM button until Heat is
Diagnostic: Press the SY
SYSTEM
displayed and raise the setpoint above room temperature. Within a few seconds the thermostat should
make a soft click sound. This sound usually indicates
the thermostat is operating properly. If the thermostat
does not click, try the reset operation by pressing the
WN
FAN
CK, and the temperature DO
DOWN
AN, TIME BACK
arrow at the same time. If the thermostat does not
click after being reset, contact your heating and
cooling service person or place of purchase for a
replacement. If the thermostat clicks, contact the
furnace manufacturer or a service person to verify the
heating is operating correctly.
No Cool
1. Thermostat not set to Cool.
STEM button to Cool and lower
Press the SY
SYSTEM
temperature below room temperature.
Verify thermostat and system wires are securely
attached.
Same procedure as Diagnostic for No Heat condition
except set the thermostat to Cool and lower the
setpoint below the room temperature. There may be
up to a 5 minute delay before the thermostat clicks in
Cooling.
2. Loose connection to thermostat
or system.
3. Cooling system requires
service or thermostat requires
replacement
43
Troubleshooting
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
Heat, Cool or Fan Runs
Constantly
1. Possible short in wiring.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan
system.
4. Fan Switch is set to Fan On.
Check each wire connection to verify they are not
shorted or touching together. No bare wire should
stick out from under terminal screws. Try resetting
the thermostat as described in previous Corrective
Actions. Also, if the FAN switch is set to the ON
position, the blower fan will cycle continuously
whether the heating or cooling system is running,
move FAN switch to the AUTO position. If the
condition persists, the manufacturer of your system
or service person can instruct you on how to test the
Heat/Cool system for correct operation. If the system
operates correctly, replace the thermostat.
Thermostat Setting and
Thermostat Thermometer
Disagree
1. Thermostat thermometer
setting requires adjustment.
The thermometer can be adjusted +/- 5 degrees. See
Temperature Display Adjustment in the Configuration
Menu Section.
Thermostat Does Not Follow
Program
1. AM or PM set incorrectly in
program.
2. AM or PM set incorrectly on
the clock.
3. Voltage spike or static
discharge.
44
Check current clock and program settings including
the AM or PM designations for each time period. If a
voltage spike or a static discharge occurs, use the
ACK
Reset Operation by pressing FAN
AN, TIME B
BA
CK, and
WN arrow at the same time.
the temperature DO
DOWN
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
Blank Display and/or Keypad
Not Responding
1. Voltage spike or static
discharge.
2. Battery change required.
Replace batteries and check heat/cool system for
proper operation. If a voltage spike occurs, use the
ACK
Reset Operation by pressing FAN
AN, TIME B
BA
CK, and
WN arrow at the same time.
the temperature DO
DOWN
The room Humidity display can be adjusted to read
higher or lower by following the configuration menu
and adjusting the humidity to a higher or lower value
(up to 20% RH). To adjust the humidity display refer
TION section (page 19, step
to the CONFIGURA
CONFIGURATION
14).
How do I change the room
Humidity display?
45
INDEX
Adjustable Humidity Display ------ 36
Adjustable Temperature Display -- 32
Air Filter Change-out Indicator --- 35
Arm Chair Programming ----------- 31
Automatic Changeover ------------ 32
Automatic Humidity Reduction,
Programmable --------------------- 37
Battery Back-Up --------------------- 33
Compressor Short-Cycle
Protection -------------------------- 35
CONFIGURATION ------------------ 4
Configuration Menu Chart --------- 18
Copy ----------------------------------- 25
Daylight Savings Time Button ---- 33
Energy Management Recovery ---- 32
Fan Control, Programmable -------- 33
Factory Preprogrammed ------------ 31
FAQs ---------------------------------- 38
FEATURES -------------------------- 30
Humidifier Maintenance Indicator 36
INTRODUCTION -------------------- 2
Thermostat Buttons --------------- 2
Display ------------------------------ 3
Keypad Lockout --------------------- 34
Liquid Crystal Display -------------- 31
Operation
Manual ----------------------------- 24
Programmed ----------------------- 24
Program
Entering Your --------------------- 24
Indefinite Hold -------------------- 31
Planning Your --------------------- 24
Temporary Override -------------- 31
Styles ------------------------------- 24
PROGRAMMING ------------------ 24
Schedule
Sample Programs ----------------- 26
Personal Programs ---------------- 28
Set
Clock ------------------------------- 24
Day --------------------------------- 24
Program ---------------------------- 24
System and Thermostat
Diagnosis -------------------------- 35
Thermostat Startup After Total
Power Loss ------------------------ 34
Troubleshooting --------------------- 42
Vacation ------------------------------- 33
37-6459A
0339
Index
NO
TES
NOTES
NO
TES
NOTES
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.
White-Rodgers is a division
of Emerson Electric Co.
Printed in U.S.A.
PART NO. 37-6459A
0339