1F59-13
Low Voltage Heat Pump Thermostat
INSTALLATION & OPERATION
INSTRUCTIONS
WHITE-RODGERS
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE
PERSONAL INJURY AND/OR PROPERTY DAMAGE.
DESCRIPTION
These thermostats are designed to control a heat pump system
where automatic changeover is not required.
The 1F59-13 thermostat has no indicator lights.
50
60
70
80
90
70
1F59-13
PRECAUTIONS
If in doubt about whether your wiring is millivolt, line, or low
voltage, have it inspected by a qualified heating and air condi-
tioning contractor or a licensed electrician.
CAUTION
!
To prevent electrical shock and/or equipment damage,
disconnect electric power to system at main fuse or
circuit breaker box until installation is complete.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical codes
and ordinances.
WARNING
!
This control is a precision instrument, and should be handled
carefully.Roughhandlingordistortingcomponentscouldcause
the control to malfunction.
Do not use on circuits exceeding 30 volts. Higher
voltage will damage control and could cause shock or
fire hazard.
DO NOT USE this thermostat on heat pump systems
that have a spark ignition gas or fossil fuel second
stage heat source.
SPECIFICATIONS
ELECTRICAL DATA
THERMAL DATA
Electrical Rating:
Temperature Range: 40°F to 90°F (4°C to 32°C)
18 to 30 VAC, 50/60 Hz
0.01 to 1.5 amps (load per terminal)
2.5 amps max. total load (all terminals combined)
Rated Differential:
Stage 1 heat – 1.3°F (max.)
Stage 2 heat – 0.9°F (max.)
Cooling – 1.3°F (max.)
STAGING DATA
DIMENSIONS
Up to two heating stages
3.5” H x 5.5” w x 1.25” D
One cooling stage
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
PART NO. 37-5780A
Printed in U.S.A.
9713
WIRE THERMOSTAT TO SYSTEM
Insert stripped wires into terminal blocks,
then tighten terminal screws.
For best electrical connection, use solid 18 gauge wire. If you
mustusestrandedwire, tinthewireswithsoldertoinsureagood
electrical connection.
1. Strip wires back 1⁄4”.
W
R
G
O
Y
B
L
C
W7
2. Using needle-nose pliers, insert wire into correct terminal
block opening (see figs. 3 and 4).
See
System
Function
Table
Anticipation
Selection
Switches
3. Tighten terminal block connector screw.
4. Repeat steps 2 and 3 for each wire.
Pull wires through this opening
Setpoint switch
(without knob)
Figure 3. Thermostat base with typical wiring
CAUTION
NOTE
!
To prevent electrical shock and/or equipment damage,
disconnect electrical power to system at main fuse or
circuit breaker until installation is complete.
Thistypicalwiringdiagramshowsonlytheterminalidentification
and wiring hookup. Always refer to wiring instructions provided
by equipment manufacturer for system hookup.
All wiring should be installed in accordance with local and
national codes and ordinances.
Thermostat
Control
Circuit
THERMOSTAT
SYSTEM
B
O
Y
G
W
C
L
R
Auxiliary
Heat
Relay
Reversing
Valve*
Compressor
Contactor
Malfunction
Switch
Hot
Fan
Reversing
Valve**
120 VAC
Neutral
24 VAC
Relay
TRANSFORMER
* Reversing valve is energized when the System Switch is in the HEAT position
** Reversing valve is energized when the System Switch is in the COOL position
Figure 4. Typical wiring diagram
3. Carefully snap cover onto thermostat base. Refer to the
ATTACH SETPOINT KNOB AND COVER
OPERATION section for instructions on setting the thermo-
stat for desired operation.
1. Afterthermostatbaseismountedonwall, removecardboard
insert from setpoint switch.
2. Carefully press setpoint knob onto setpoint switch (see fig. 5).
Setpoint
Knob
Setpoint
Switch
1
2
O
F
F
F
G
O
Y
1
2
O
F
F
5
G
O
Y
5 5
4 5 5 0
4 0
60
62
6465
66
5 5
4 5 5 0
4 0
60
9 0
50
62
60
8 8
8 6
8 4
8 3
8 2
6465
66
70
80
68
9 0
90
8 8
8 6
8 4
8 3
8 2
69
70
71
68
7
69
70
71
8 1
8 0
7 9
72
73
74
7 8
77
8 1
8 0
7 9
72
73
74
7 8
77
B
C
A
Figure 5. Attach setpoint knob and cover
3
OPERATION
SWITCH POSITIONS
SYSTEM FUNCTION
Rev
Valve Valve
(O) (B)
Rev
Aux
Heat Compr.
Relay Contact
FAN
SYSTEM
Fan
Emer Relay
COMPONENT OPERATION
Auto
On
Cool
Off
Heat
No heat - no cool - no fan - no lights
Heating Mode: stage 1 calling. Fan relay,
compressor contactor, and reversing valve (B)
energized by thermostat.
Heating Mode: both stages calling. Fan relay,
compressor contactor, reversing valve (B),
and auxiliary heat relay are energized.
Emergency Heat Mode: aux heat, Fan Relay*
and reversing valve (B) are energized.
Compressor locked out.
Cooling Mode: Fan relay, compressor
contactor and reversing valve (O) energized.
Fan On: Energizes fan relay regardless
of system switch position.
Indicates switch position on thermostat subbase and system function in operation.
* In EMERGENCY HEAT mode, fan may be disabled if required by cutting jumper W7 (see Fig 3)
This thermostat is easy to operate. The above table shows how
the system will operate when the FAN and SYSTEM switches
are in different positions.
FAN
AUTO
ON
To set the switches, open the door on the left side of the
thermostat (see fig 6). Move the FAN andSYSTEM switches up
or down to select desired system operation. To set the tempera-
ture, move the temperature selection knob (on the right side of
the thermostat) until the desired temperature is shown in the
70
SYSTEM
50 60 70 80 90
COOL
OFF
HEAT
EMER
window.
ANTICIPATION ADJUSTMENT
Figure 6. Thermostat with door open
The anticipation setting on this thermostat is adjustable. Any
anticipation setting (including the factory setting) will work with
any system for which this thermostat is intended for use.
However, the user may be more comfortable with a particular
setting. If the system is turning on and off too often (short cycles)
or not often enough (long cycles) for the user’s comfort, follow
these steps to adjust the anticipation.
Antic.=14*
Antic.=10* (Factory setting) Antic.=16*
Antic.=30*
1
2
1
2
1
2
1
2
OFF
OFF
OFF
OFF
Shorter
Cycles
Longer
Cycles
1. Turn off power to the thermostat.
* These numbers represent different anticipation settings. See fig. 8 for
further information.
2. Remove the thermostat cover.
3. Locate the anticipation adjustment switches (see fig. 3).
Figure 7. Anticipation selection switch settings
4. Usingapencilorsmallscrewdriver,movetheswitches
to the desired setting (see figs. 7 and 8).
First Stage Heat and Cool
Second Stage and Emergency Heat
Anticipation Approx.
Anticipation
Approx.
5. Carefully snap the cover onto the thermostat base.
6. Turn on power to the thermostat.
Reference Temperature
Reference Temperature
Number
10
Differential*
0.8°F
Number
10
Differential*
0.3°F
14
16
1.1°F
1.3°F
14
16
0.4°F
0.5°F
30
2.4°F
30
0.9°F
* These numbers are approximate and represent thermostat operation with a typical
system. Actual temperature differentials may vary.
Figure 8. Approximate temperature differential and cycle times
COMPRESSOR SHORT TERM CYCLE
PROTECTION
LOCKOUT BYPASS OPTION
FOR QUALIFIED SERVICE TECHNICIANS’ USE ONLY.
OPERATORS SHOULD NOT USE THIS FEATURE DUE
TO POSSIBILITY OF EQUIPMENT DAMAGE, OR PER-
SONAL INJURY.
Thesethermostatshaveabuilt-inshortterm(5-minute)
time delay. During this 5-minute period, the thermostat
will lock out the compressor to allow heat pressure to
stabilize. If you want to override this feature while
testingthermostatoperation,movetheSYSTEMswitch
to OFF. Wait about 6 to 8 seconds, then move the
SYSTEM switch back to the previous position.
DO NOT USE THE LOCKOUT BYPASS OPTION UN-
LESS THE COMPRESSOR OIL HEATERS HAVE BEEN
OPERATIONAL FOR AT LEAST 6 HOURS AND THE
SYSTEM HAS NOT BEEN OPERATIONAL FOR AT
LEAST 5 MINUTES.
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