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Copyright © 2004 Honeywell International Inc.  •  

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INSTALLATION INSTRUCTIONS

69-1712—1

TH5110D Non-programmable

Thermostat

APPLICATION

The TH5110D Non-programmable Thermostat provides 
electronic control of 24 Vac, single-stage heating and 

cooling systems or 750 mV heating systems. See Table 1 
for a description. 

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.

Table 1. TH5110D Thermostat description.

Feature

Description

Powering Methods

Battery only

Common wire only

Common wire with battery backup

System Types (Up to 1 Heat, 1 Cool)

Gas, oil or electric heat with air conditioning

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

Changeover

Manual or auto changeover selectable

System Setting

Heat-Off-Cool-Auto

Fan Setting

Auto-On

Summary of Contents for FocusPRO TH5110D

Page 1: ...ash Contact your local waste management authority for instructions regarding recycling and the proper disposal of the old thermostat Table 1 TH5110D Thermostat description Feature Description Powering Methods Battery only Common wire only Common wire with battery backup System Types Up to 1 Heat 1 Cool Gas oil or electric heat with air conditioning Warm air hot water high efficiency furnaces heat ...

Page 2: ...m ducts Radiant heat from sun or appliances Concealed pipes and chimneys Unheated uncooled areas such as an outside wall behind the thermostat Separate Wallplate from Thermostat 1 Separate the wallplate from the thermostat See Fig 2 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 wallpl...

Page 3: ...prevent drafts from affecting the thermostat 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 ...

Page 4: ...CTOR THERMOSTAT WIRING TERMINALS L2 R C 1 L1 HOT L2 RC C 1 2 3 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED 1 2 3 OPTIONAL 24 VAC COMMON CONNECTION REMOVE FACTORY INSTALLED JUMPER HEAT RELAY M22070 G O B W Y C R Rc L1 HOT FAN RELAY COMPRESSOR CONTACTOR L2 R C 1 2 3 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED 1 2 3 4 OPTIONAL 24 VAC COMMON ...

Page 5: ...LOAD PROTECTION AS REQUIRED 1 2 3 OPTIONAL 24 VAC COMMON CONNECTION 4 4 CONFIGURE SYSTEM TYPE TO HEAT ONLY IN THE INSTALLER SETUP FACTORY INSTALLED JUMPER TR TR POWER TO OPEN AND POWER TO CLOSE MOTOR OR VALVE SERIES 20 B W R THERMOSTAT WIRING TERMINALS M22074 G O B W Y C R Rc L1 HOT L2 R C 1 2 3 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED 1 2 3 OPTIONAL 24 VAC COMMON ...

Page 6: ...llplate Remove the metal jumper between Rc and R Installing Batteries Install two AAA alkaline batteries on the back of the thermostat as marked on the battery holder See Fig 14 NOTE After the thermostat is mounted on the wallplate the thermostat does not require removal from the wallplate to replace the batteries Refer to the enclosed Operating Instructions 69 1713 for more information on the rem...

Page 7: ...nfigure Installer Setup 3 See Fig 18 to review how the thermostat buttons are used during Installer Setup See Table 3 for the Installer Setup Numbers and Settings Fig 18 Review thermostat buttons used for Installer Setup ReplaceBatt Service Needed Setting Cool Inside Fan Auto Cool System M22079 ReplaceBatt Service Needed Done Next M22143 ReplaceBatt Service Needed Done Next M22144 SETTING INSTALLE...

Page 8: ...ling Factory Setting 1 Changeover valve O B terminal energized in heating 3 May not appear See Note b Fan Control in Heating 0 Gas or oil furnace equipment controls fan in heating Factory Setting 1 Electric furnace thermostat controls fan in heating 5 May not appear See Note c Heating Cycle Rate in cycles per hour cph 5 5 cph used for gas or oil furnaces less than 90 efficient Factory Setting 1 1 ...

Page 9: ...appearing ReplaceBatt Service Needed Fan Auto Cool System M22145 ReplaceBatt Service Needed Done Next M22146 SYSTEM STATUS NUMBER SYSTEM TEST NUMBER DONE BUTTON EXITS THE INSTALLER SYSTEM TEST DOWN BUTTON TURNS THE SYSTEM OFF UP BUTTON TURNS THE SYSTEM ON NEXT BUTTON ADVANCES TO NEXT SYSTEM TEST NUMBER Table 4 Installer System Tests System Test Number Test Type System Status Number and Description...

Page 10: ...tartup and after power interruptions If there is a call for cooling or heating during the Minimum Off Time the thermostat flashes Cool On or Heat On a When the Minimum Off Timer expires Cool On or Heat On a appears solid in the display and the compressor and fan turn on ______________ aHeat Pumps only Accessories Replacement Parts 1 Cover Plates see Fig 23 50001137 001 Small Cover Plate 4 5 16 in ...

Page 11: ...he secondary side of the transformer between power and common If voltage is not present check the cooling equipment to find the cause of the problem Check for 24 Vac between the cool terminal Y and transformer common If 24 Vac is present the thermostat is functional Check the cooling equipment to find the cause of the problem Loose or broken wire connection between thermostat and cooling equipment...

Page 12: ... and or cooling equipment System Setting Adjustment Installer Setup Number 12 is set to Auto Changeover Only Setting 2 Set System Setting Adjustment Installer Setup Number 12 to Manual Changeover Setting 0 or Auto Changeover Setting 1 Cannot set the system setting to Cool System Type Installer Setup Number 1 is set to Heat Only Setting 2 or Heat Only with Fan Setting 3 Set System Type Installer Se...

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