Honeywell Thermostat Rth2300b1012a Manual

RTH2300/RTH221
Programmable Thermostat
Quick Installation Guide
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Quick Installation Guide
Identify System Type
This thermostat is compatible with the following systems:
Gas, oil or electric furnace•	
Central air conditioner•	
Hot water system with or without pump•	
Millivolt system•	
Central heating and cooling system•	
Heat pump without auxiliary/backup heat•	
Do you need assistance?
We are here to help.
Call 1-800-468-1502.
This thermostat cannot be used on heat pumps with auxiliary/backup heat or on multistage systems. 

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RTH2300/RTH221
1
Turn Off Power to Heating/ 
Cooling System
M28097 

69 -2448ES—03 2
Quick Installation Guide
Remove Old Thermostat2
M28099
Old thermostat
Cover
Remove old thermostat but leave wallplate with  wires attached.
Do not remove wallplate yet
MERCURY NOTICE  Do not put your old thermostat in the trash if it contains mercury in a sealed tube. Contact your local waste management authority for instructions regarding recycling and proper disposal. 

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RTH2300/RTH221
If any wires are not attached to your old thermostat or are attached to a terminal marked C or C1, they will not be connected to your new thermostat. Wrap the bare metal end of each of these wires with electrical tape, so it can-not touch and short other wires.
Identify Wires3
M29988
Disconnect wires and remove the old wallplate only after all wires are labeled. Wrap the wires around a pencil to prevent them from falling though the wall opening.
Do not use non-connected...

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Quick Installation Guide
Mount New Wallplate
Loosen the locking screw at the bottom of the 1. thermostat. Note that the screw is captive and cannot be removed from the wallplate.
Separate the thermostat from the wallplate as per 2. Figure 1.
Position the wallplate against the wall and mark hole 3. positions with a pencil.  NOTE: Levelling is for esthetics only and will not affect the performance of the thermostat.
Drill holes at the marked positions and insert supplied 4. wall anchors....

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RTH2300/RTH221
Connect Wires (typical wiring)
Loosen the terminal screws using a screwdriver, insert 2. the wires, then tighten the screws.
Push any excess wire back into the wall opening.3. 
Labels don’t match?  If a wire does not match any terminal designation, see next page.
5
Match each labeled wire with the terminal having the 1. same letter.
O/B       Y        RC         R        G          WM32155A
REMOVE JUMPER
IF YOU HA VE BOTH 
R A ND RC WIRES 

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Quick Installation Guide
Connect Wires (alternate wiring)5
If labeled wire does not match any terminal designation, see diagram below.
M32169A
REMOVE JUMPER BETWEEN R AND RC IF YOU HAVE 
WIRES ON BOTH  R AND RC.
DO NOT USE C, C1, OR X WIRE.  DO NOT USE B WIRE 
IF YOU ALREADY HAVE 0 WIRE.  WRAP BARE END OF 
WIRE WITH ELECTRICAL TAPE.
PLACE A JUMPER (PIECE OF WIRE) BETWEEN Y AND 
W IF YOU ARE USING A HEAT PUMP WITHOUT 
AUXILIARY/BACKUP HEAT.
1
2
3
O/B       Y        RC         R         G...

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RTH2300/RTH221
Set jumper JP1, on the back of the thermostat, if you have connected a wire to the G terminal.
Set Heating Fan Control6
HGLeave the jumper in this factory-set position if you have a gas or oil furnace.
HEPlace the jumper to this position if you have an electric furnace.
Incorrect jumper setting: An incorrect setting is notice-able in a gas or oil heating system. When heating starts, you will initially feel cold air coming out of the vents as the fan is running before the...

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Quick Installation Guide
Set jumper JP2, on the back of the thermostat, if you have a heat pump.
Set Heat Pump Reversing Valve7
OLeave the jumper in this factory-set position if you have connected O wire to the O/B terminal.
BPlace the jumper to this position if you have connected B wire to the O/B terminal.
Incorrect jumper setting: The heat pump operation will be reversed, i.e., it will cool in Heat mode and will heat in Cool mode.
JP2