White Rodgers Comfort-Set 1F97-391 User manual

Comfort-Set®
90 SeriesTM
PREMIUM
1F97-391
Installation and
Operating Instructions
Retain for Future Use
Thermostat/Humidifier Control
Digital 7 Day Programmable

17 16
4
356
2
17 8 9
10
11
12
13
14
15
Easy, Menu-Driven Set-Up
and Programming
Premium options
to customize the thermostat
to fit your application.

1
INTRODUCTION
Thank you for purchasing your
new Comfort-Set 90 thermostat
and humidifier control. White-
Rodgers has been producing
energy saving controls for over
60 years. We have been design-
ing and producing the Comfort-
Set family of electronic pro-
grammable thermostats since
1982. Comfort-Set 90 is the
third generation of the elec-
tronic programmable family.
We believe you will find that
the Comfort-Set 90 is the most
user friendly and technologi-
cally advanced thermostat and
humidifier control available
today.
Introduction Installation/Configuration Programming FAQs
Features
You will find information about
thermostat buttons and display
beginning on page 2.
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
Troubleshooting Index

2
THETHE
THETHE
THE THERMOSTTHERMOST
THERMOSTTHERMOST
THERMOSTAA
AA
AT BT B
T BT B
T BUTTUTT
UTTUTT
UTTONSONS
ONSONS
ONS
See inside front cover for illustration
showing button locations.
1(Blue arrow) Lowers temperature
setting (45°F or 7°C minimum)
2(Red arrow) Raises temperature setting
(99°F or 37°C maximum)
3The yellow indicator glows when the
system is operating.
4
This button (on top of the cover) lights
the display.
5
Used to initiate or review thermostat
programming.
6Used with TIME
FWD
/TIME
BACK
to set the clock.
7
Used to adjust the time backward, or to
select the previous menu item.
8
Used to adjust the time forward, or to
select the next menu item.
9
Used with TIME
FWD
/TIME
BACK
to set the current day and with
HOLD
to
enter VACATION mode.
10
Used to advance operation to the next
program period.
11 Used to manually override program-
ming to hold at a selected temperature.
12
Used to display humidity.
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.
14 Used to set/reset the filter and
humidity maintenance timer.
15 Sets the system mode (HEATing, OFF,
COOLing, or AUTOmatic changeover).
16 Used to adjust the clock one hour
forward or back.
17 Used to start or return to program
operation.
INTRODUCTION

3
FAN AUTOHRS
CHECK BATTERY
F
AM
MON
FAN AUTO
HEATHEAT
HRS
CHECK BATTERY
F
AM
MON WED THU FRI SAT SUNTUEWED THU FRI SAT SUNTUE
18 18
19 20 21
22
25
2324
Figure 1. The Display
LARLAR
LARLAR
LARGE LIGHTED (LGE LIGHTED (L
GE LIGHTED (LGE LIGHTED (L
GE LIGHTED (LCD) DISPLACD) DISPLA
CD) DISPLACD) DISPLA
CD) DISPLAYY
YY
Y
The thermostat display alternately shows
the current time and the current tempera-
ture on the left side. The display also
shows the temperature you have pro-
grammed or set on the right side of your
screen.
18 Displays system mode (HEAHEA
HEAHEA
HEATT
TT
T, OFFOFF
OFFOFF
OFF,
COOLCOOL
COOLCOOL
COOL, AA
AA
AUTUT
UTUT
UTOO
OO
O, HOLDHOLD
HOLDHOLD
HOLD, VV
VV
VAA
AA
ACACA
CACA
CA or
HUMDHUMD
HUMDHUMD
HUMD). During programming displays the
time period (MOR,MOR,
MOR,MOR,
MOR, DD
DD
DAA
AA
AYY
YY
Y
,,
,,
,EVE,EVE,
EVE,EVE,
EVE, NHTNHT
NHTNHT
NHT)
being programmed. In the configuration
menu, the menu item name is shown, one
word at a time (PRPR
PRPR
PRGMGM
GMGM
GM MODEMODE
MODEMODE
MODE, EMREMR
EMREMR
EMR,
COOLCOOL
COOLCOOL
COOL FF
FF
FANAN
ANAN
AN DELADELA
DELADELA
DELA OFFOFF
OFFOFF
OFF, etc.).
19
CHECK BCHECK B
CHECK BCHECK B
CHECK BAA
AA
ATTERTTER
TTERTTER
TTERYY
YY
Yappears when the
“AA” alkaline batteries are weak and
should be replaced. BB
BB
BAA
AA
ATTERTTER
TTERTTER
TTERYY
YY
Yappears
when the thermostat is running on battery
power only. CHECK STCHECK ST
CHECK STCHECK ST
CHECK STAA
AA
ATT
TT
T appears when
the thermostat detects certain problems
within itself. CHECK SYCHECK SY
CHECK SYCHECK SY
CHECK SYSTEMSTEM
STEMSTEM
STEM appears
when the thermostat detects certain
problems in the heating or humidity
system.
20 Indicates the length of time remaining
in a temporary hold condition. Also
indicates the length of time remaining in
VACATION mode.
21 Displays FF
FF
FAN ONAN ON
AN ONAN ON
AN ON when the fan is
operating continuously. Displays FF
FF
FANAN
ANAN
AN
AA
AA
AUTUT
UTUT
UTOO
OO
Owhen the fan cycles with the
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.
25 The word HEAHEA
HEAHEA
HEATT
TT
Tor COOLCOOL
COOLCOOL
COOL will appear
above or below the setpoint if area 18 is
needed to display other information.
Introduction

4
INSTALLATION AND CONFIGURATION
This White-Rodgers Automatic
Setback Digital Thermostat uses
microcomputer technology to provide
precise time, temperature and humidity
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
Model 1F97-391Model 1F97-391
Model 1F97-391Model 1F97-391
Model 1F97-391 7 Day Programming
ELECTRICAL DELECTRICAL D
ELECTRICAL DELECTRICAL D
ELECTRICAL DAA
AA
ATT
TT
TAA
AA
A
Electrical Rating:
17 to 30 VAC, 50/60 Hz
0.05 to 1.5 Amps
1.5 Amps Maximum Total Load
(All terminals combined)
THERMAL DTHERMAL D
THERMAL DTHERMAL D
THERMAL DAA
AA
ATT
TT
TAA
AA
A
Setpoint Temperature Range:
45° to 99°F (7° to 37°C)
Setpoint Humidity Range:
10% to 45%
OperatingAmbient 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)
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.
Standard Systems:
Fuel: Gas, Oil, Electric
Type: Heating/Cooling, Heat Only,
Hot Water or Steam Systems, Cool
Only

5
PRECAUTIONSPRECAUTIONS
PRECAUTIONSPRECAUTIONS
PRECAUTIONS
WARNING
!
Do not shorDo not shor
Do not shorDo not shor
Do not short out tert out ter
t out tert out ter
t out terminals onminals on
minals onminals on
minals on
gg
gg
gas vas v
as vas v
as valvalv
alvalv
alve or primare or primar
e or primare or primar
e or primary contry contr
y contry contr
y control tool to
ol tool to
ol to
test.test.
test.test.
test. ShorShor
ShorShor
Short or incort or incor
t or incort or incor
t or incorrr
rr
rect wiringect wiring
ect wiringect wiring
ect wiring
will damawill dama
will damawill dama
will damagg
gg
ge there ther
e there ther
e thermostamosta
mostamosta
mostat andt and
t andt and
t and
could cause percould cause per
could cause percould cause per
could cause personal injursonal injur
sonal injursonal injur
sonal injury and/y and/
y and/y and/
y and/
or pror pr
or pror pr
or properoper
operoper
operty damaty dama
ty damaty dama
ty damagg
gg
gee
ee
e..
..
.
Do not use on cirDo not use on cir
Do not use on cirDo not use on cir
Do not use on circuits ecuits e
cuits ecuits e
cuits exx
xx
xceedingceeding
ceedingceeding
ceeding
specified vspecified v
specified vspecified v
specified voltaolta
oltaolta
oltagg
gg
gee
ee
e..
..
.HigherHigher
HigherHigher
Higher
vv
vv
voltaolta
oltaolta
oltagg
gg
ge will damae will dama
e will damae will dama
e will damagg
gg
ge contre contr
e contre contr
e control andol and
ol andol and
ol and
could cause shoccould cause shoc
could cause shoccould cause shoc
could cause shock or firk or fir
k or firk or fir
k or firee
ee
e
hazard.hazard.
hazard.hazard.
hazard.
TT
TT
Therher
herher
hermostamosta
mostamosta
mostat installat installa
t installat installa
t installationtion
tiontion
tion
and all components of theand all components of the
and all components of theand all components of the
and all components of the
system shall confsystem shall conf
system shall confsystem shall conf
system shall conforor
oror
orm to Class IIm to Class II
m to Class IIm to Class II
m to Class II
circir
circir
circuits per the NEC codecuits per the NEC code
cuits per the NEC codecuits per the NEC code
cuits per the NEC code..
..
.
TT
TT
To pro pr
o pro pr
o pree
ee
evv
vv
vent electrical shocent electrical shoc
ent electrical shocent electrical shoc
ent electrical shock and/k and/
k and/k and/
k and/
or equipment damaor equipment dama
or equipment damaor equipment dama
or equipment damagg
gg
gee
ee
e,,
,,
,discon-discon-
discon-discon-
discon-
nect electric ponect electric po
nect electric ponect electric po
nect electric poww
ww
wer to system aer to system a
er to system aer to system a
er to system att
tt
t
main fuse or cirmain fuse or cir
main fuse or cirmain fuse or cir
main fuse or circuit brcuit br
cuit brcuit br
cuit breakeak
eakeak
eaker boer bo
er boer bo
er boxx
xx
x
until installauntil installa
until installauntil installa
until installation is completetion is complete
tion is completetion is complete
tion is complete..
..
.
CAUTION
!
WARNING
!
Do not wire HM1 or HM2 fromDo not wire HM1 or HM2 from
Do not wire HM1 or HM2 fromDo not wire HM1 or HM2 from
Do not wire HM1 or HM2 from
therther
therther
thermostamosta
mostamosta
mostat (24 vt (24 v
t (24 vt (24 v
t (24 volts) to HUM onolts) to HUM on
olts) to HUM onolts) to HUM on
olts) to HUM on
ignition contrignition contr
ignition contrignition contr
ignition control (120 vol (120 v
ol (120 vol (120 v
ol (120 volts).olts).
olts).olts).
olts).
NOTE
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
conditioning contractor or licensed
electrician.
All wiring must conform to local and
national electrical codes and ordi-
nances.
This control is a precision instrument,
and should be handled carefully.
Rough handling or distorting compo-
nents could cause the control to
malfunction.
RR
RR
Read all instread all instr
ead all instread all instr
ead all instructions thoructions thor
uctions thoructions thor
uctions thoroughloughl
oughloughl
oughlyy
yy
y
befbef
befbef
beforor
oror
ore bee be
e bee be
e beginning installaginning installa
ginning installaginning installa
ginning installation.tion.
tion.tion.
tion.
Installation/Configuration

6
INSTINST
INSTINST
INSTALLAALLA
ALLAALLA
ALLATIONTION
TIONTION
TION AND CONFIGURAAND CONFIGURA
AND CONFIGURAAND CONFIGURA
AND CONFIGURATIONTION
TIONTION
TION
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 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.
REMOVE OLD THERMOSTATREMOVE OLD THERMOSTAT
REMOVE OLD THERMOSTATREMOVE OLD THERMOSTAT
REMOVE OLD THERMOSTAT
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.
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.
ATTACH BASE TO WALLATTACH BASE TO WALL
ATTACH BASE TO WALLATTACH BASE TO WALL
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 non-
absorbent 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.
ATTENTION!ATTENTION!
ATTENTION!ATTENTION!
ATTENTION!

7
HM1 WRH
RC GYHM2 6
S1 S2 S3
1
23
4
1
Figure 2 – Thermostat base
1Mounting screws
2Pull wires through this opening
3
Insert wires into terminal holes, then tighten screws
4Screw anchors
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.
CONFIGURINGCONFIGURING
CONFIGURINGCONFIGURING
CONFIGURING
AND PROGRAMMINGAND PROGRAMMING
AND PROGRAMMINGAND PROGRAMMING
AND PROGRAMMING
Installation/Configuration

8
HM1 W RH RC G Y HM2 6
W
RH
123
HM1 HM2
6YGWRC RH
E
H
JI
M
K
L
WIRING DIAWIRING DIA
WIRING DIAWIRING DIA
WIRING DIAGRAMSGRAMS
GRAMSGRAMS
GRAMS
All wiring diagrams are for typical systems only. Refer to equipment manufacturers' instructions for specific system wiring
information.
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.
1From heating system
2From 24 VAC transformer
3
Red jumper wire (provided)
For humidifier wiring see pages 14-15.
See page 9 for letter identification.
Figure 3 – Typical wiring diagram for heating only, single transformer system

9
A
Humidifier System
B
Zone Valve
C
Cooling System
D
Fan Relay
E
Heating System
H
Jumper Wire
I
TRANSFORMER
J
24 VAC Side
K
120 VAC Side
L
Hot Side
M
Neutral Side
N
HEATING TRANSFORMER
O
COOLING TRANSFORMER
P
Jumper Wire (field-installed)
LETTER IDENTIFICATION FOR WIRING DIAGRAMS
Installation/Configuration

10
HM1 W RH RC G Y HM2 6
G
Y
5
3
24
RH
W
1
HM1 HM2
6YGWRC RH
ED
C
H
JI
M
K
L
1
From heating system
2From 24 VAC transformer
3Red jumper wire (provided)
4
From fan relay
5From cool system
For humidifier wiring see pages 14-15.
See page 9 for letter identification.
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 GG
GG
G,,
,,
, WW
WW
W
and RHRH
RHRH
RH. For cool only system, connect terminals YY
YY
Y
,,
,,
,GG
GG
G and RHRH
RHRH
RH.
Figure 4 – Typical wiring diagram for heat only, cool only, & heat/cool single transformer system

11
HM1 W RH RC G Y HM2 6
W
RH
12
6
4
3
HM1 HM2
YGWRC RH
H
JI
M
K
L
6
6
1
45
2
B
1From heating system
2From 24 VAC transformer
(through zone valve)
3
Red jumper wire (provided)
4From zone valve system
For humidifier wiring see pages 14-15.
See page 9 for letter identification.
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
Installation/Configuration

12
HM1 W RH RC G Y HM2 6
W
RH
12
RC
G
Y
5
34
HM1 HM2
6YGWRC RH
ED
C
JI
M
K
L
JO
M
K
L
1From heating system
2From 24 VAC heating transformer
3
From 24 VAC cooling transformer
4From fan relay
5From cooling system
For humidifier wiring see pages 14-15.
See page 9 for letter identification.
Figure 6 – Typical wiring diagram for heat/cool, two-transformer system

13
Installation/Configuration
HM1 HM2
6YGWRC RH
D
C
JI
M
K
L
HM1 W RH RC G Y HM2 6
1
RC
G
Y
3
2
1
From 24 VAC cooling transformer
2From fan relay
3From 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

14
HM1 6 Y G W
HM2
RC RH
HM1 W RH RC G Y HM2 6
A
1
L
M
KJ
1
I
HM
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.
Most installers will use HM1 unless they feel more humidity is
desirable.
Figure 8 – Typical wiring diagram for 24V humidifier system
1
From humidity system
See page 9 for letter identification.

15
HM1 6 Y G W HM2 RC RH
HM1 W RH RC G Y HM2 6
A
1
L
M
K
K
J
1
I
Relay
90-290Q
or equivalent
HM
Figure 9 – Typical wiring diagram for 120V humidifier system
1From humidity system
See page 9 for letter identification.
Installation/Configuration

16
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.
JUMPERSJUMPERS
JUMPERSJUMPERS
JUMPERS
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.
CONFIGURACONFIGURA
CONFIGURACONFIGURA
CONFIGURATIONTION
TIONTION
TION
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.

17
1 32
W922 W914
1
Clip for remote sense
23-pin connector
3Clip for electric heat Figure 10 – Jumper locations
Installation/Configuration

18
Step Press Button(s) Displayed (Factory Default) Press or to select: COMMENTS
1EMR
(ON) OFF
2SET CYCL HEAT
(05) 02 - 40
Adjusts heat anticipation value (2 through 40)
See page 20
3SET CYCL COOL
(12) 09 - 40
4COOL FAN DELA OFF
(01) 01 - 127
5COOL FAN DELA ON
(04) 01 - 05
6COMP LOCK
(OFF) ON
7SYSTEM
(HEAT-OFF-COOL-AUTO) HEAT-OFF, COOL-OFF,
HEAT-OFF-COOL
Selects system switch choices for heat only,
cool only, heat/cool or automatic changeover
See page 21
Selects EMR option ON or OFF
See page 32
Adjusts cool anticipation value (9 through 40)
See page 20
Adjusts cool fan-off delay (1 through 127 sec.)
See page 20
Selects compressor lockout ON or OFF (see NOTE)
See page 21
Adjusts cool fan-on delay (1 through 5 sec.)
See page 20
TIME
FWD
TIME
FWD
TIME
FWD
TIME
FWD
TIME
FWD
TIME
FWD
TIME
FWD
TIME
BACK
CONFIGURACONFIGURA
CONFIGURACONFIGURA
CONFIGURATION MENUTION MENU
TION MENUTION MENU
TION MENU
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.