Pentax TH5110D Instruction Manual
TH5110D Non-programmable
INSTALLATION INSTRUCTIONS
APPLICATION
The TH5110D Non-programmable Thermostat provides
electronic control of 24 Vac, single-stage heating and
Table 1. TH5110D Thermostat description.
Feature Description
Powering Methods • Battery only
System Types (Up to 1 Heat, 1 Cool) • Gas, oil or electric heat with air conditioning
Changeover Manual or auto changeover selectable
System Setting Heat-Off-Cool-Auto
Fan Setting Auto-On
• Common wire only
• Common wire with battery backup
• Warm air, hot water, high efficiency furnaces, heat pumps, steam
and gravity
• Heat only— includes power to open and power to close zone valves
(Series 20) and normally-open zone valves
• Heat only with fan
• Cool only
• 750 mV heating systems
cooling systems or 750 mV heating systems. See Table 1
for a description.
Thermostat
MERCURY NOTICE
If this control is replacing a control that contains
mercury in a sealed tube, do not place your old
control in the trash.
Contact your local waste management authority
for instructions regarding recycling and the
proper disposal of the old thermostat.
® U.S. Registered Trademark
Copyright © 2004 Honeywell International Inc. • • All Rights Reserved
69-1712—1
TH5110D NON-PROGRAMMABLE THERMOSTAT
INSTALLATION
When installing this product…
1. Read these instructions carefully. Failure to follow
these instructions can damage the product or
cause a hazardous condition.
2. Check the ratings given in the instructions and on
the product to make sure the product is suitable for
your application.
3. Installer must be a trained, experienced service
technician.
4. After completing installation, use these instructions
to check out the product operation.
CAUTION
Electrical Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power before beginning installation.
Select Thermostat Location
Select a location for the thermostat about 5ft (1.5m)
above the floor in an area with good air circulation at
average temperature. See Fig. 1.
NO
YES
NO
NO
5 FEET
[1.5 METERS]
Separate Wallplate from Thermostat
1. Separate the wallplate from the thermostat. See
Fig. 2.
THERMOSTAT
WALLPLATE
WIRE HOLE
M22042
Fig. 2. Separate wallplate from thermostat.
Install Wallplate (See Fig. 3.)
Mount the thermostat horizontally on the wall:
1. Pull the wires through the wire hole on the
wallplate.
2. Position the wallplate on the wall with the arrow
pointing up. Level the wallplate for appearance
only.
3. Use a pencil to mark the mounting holes.
4. Remove the wallplate from the wall and drill
two 3/16-in. holes in the wall (if drywall) as marked.
For firmer material such as plaster, drill two 7/32-in.
holes. Tap the wall anchors (provided) into the
drilled holes until flush with the wall.
5. Pull the wires through the wire hole on the
wallplate and position the wallplate over the wall
anchors.
6. Insert the mounting screws into the wall anchors
and tighten.
M22085
Fig. 1. Select thermostat location.
Do not install the thermostat where it can be affected by:
— Drafts or dead spots behind doors and in corners.
— Hot or cold air from ducts.
— Radiant heat from sun or appliances.
— Concealed pipes and chimneys.
— Unheated (uncooled) areas such as an outside wall
behind the thermostat.
69-1712—1 2
DRILLED HOLES (2)
WALLPLATE
Fig. 3. Install wallplate.
WALL
ANCHORS (2)
R
c
R
Y
C
(O/B)
W
G
MOUNTING
SCREWS (2)
M22140
WIRING
TH5110D NON-PROGRAMMABLE THERMOSTAT
All wiring must comply with local electrical codes and
ordinances. Refer to Table 2 for descriptions of terminal
designations. See Fig. 6-13 for wiring diagrams for
specific equipment applications.
2. Push excess wire back into the wall opening and
restrict wires to the shaded area. See Fig. 5.
WALLPLATE
WALL OPENING
CAUTION
Electrical Hazard.
Can cause electrical shock or equipment
damage.
Disconnect power before wiring.
IMPORTANT
Use 18-22 gauge thermostat wire. Shielded
cable is not required.
1. Loosen the screw terminals that are used for the
application. Insert the wires into the terminal block
and tighten each screw terminal. See Fig. 4.
TERMINAL BLOCK
SCREW TERMINALS
LETTER
DESIGNATIONS
O/B W
WIRES
RC
R
Y
C
G
WALLPLATE
RC
R
Y
W/O/B
G
M22141
Fig. 5. Restrict wires to shaded area of wire hole.
3. Plug the wall opening with nonflammable insulation
Fig. 4. Insert wires into terminal block.
Table 2. Terminal designation descriptions.
Terminal
Designation Description
Rc (see Note 1) Power for cooling—connect to secondary side of cooling system transformer
R (see Note 1) Power for heating—connect to secondary side of heating system transformer
Y Compressor contactor
C (see Note 2) Common wire from secondary side of cooling system transformer
O/B W (see Note 3) Heat relay or changeover valve terminal for heat pumps
GFan relay
Rc
R
Y
C
W
(O/B)
G
WIRE
SHADED AREA
to prevent drafts from affecting the thermostat.
M22142
NOTES:
1. When used in a single-transformer system, leave metal jumper in place between Rc and R. If used on a
two-transformer system, remove metal jumper between Rc and R.
2. Common wire is optional when thermostat is used with batteries.
3. If thermostat is configured for a heat pump in the Installer Setup, configure changeover valve
for cool (O-factory setting) or heat (B).
3 69-1712—1
TH5110D NON-PROGRAMMABLE THERMOSTAT
WIRING DIAGRAMS
THERMOSTAT WIRING TERMINALS
Rc
R
2
Y
C
O/B W
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
1
PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
OPTIONAL 24 VAC COMMON CONNECTION.
3
Fig. 6. Typical hookup of conventional 1H/1C system
O/B W
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
1
PROTECTION AS REQUIRED.
2
REMOVE FACTORY INSTALLED JUMPER.
OPTIONAL 24 VAC COMMON CONNECTION.
3
Fig. 7. Typical hookup of conventional 1H/1C system
3
G
HEAT
RELAY
FAN
RELAY
with one transformer.
THERMOSTAT WIRING TERMINALS
2
Rc
R
Y
C
G
HEAT
RELAY
3
with two transformers.
COMPRESSOR
CONTACTOR
COMPRESSOR
CONTACTOR
FAN
RELAY
R
L1
(HOT)
C
L2
1
M22068
RC
L1
(HOT)
C
L2
1
R
L1
(HOT)
C
L2
1
M22069
THERMOSTAT WIRING TERMINALS
Rc
R
2
Y
C
O/B W
4
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
1
OVERLOAD PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
OPTIONAL 24 VAC COMMON CONNECTION.
3
CONFIGURE SYSTEM TYPE TO HEAT PUMP AND CHANGEOVER
4
VALVE TO EITHER O OR B IN THE INSTALLER SETUP.
3
G
CHANGEOVER
VALVE
FAN
RELAY
COMPRESSOR
CONTACTOR
R
C
Fig. 8. Typical hookup of 1H/1C heat pump.
THERMOSTAT WIRING TERMINALS
Rc
2
R
Y
C
O/B W
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
1
OVERLOAD PROTECTION AS REQUIRED.
2
FACTORY INSTALLED JUMPER.
OPTIONAL 24 VAC COMMON CONNECTION.
3
3
G
HEAT
RELAY
R
C
Fig. 9. Typical hookup of heat only system.
L1
(HOT)
L2
M22070
L1
(HOT)
L2
M22071
1
1
69-1712—1 4
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