Honeywell RTH2300B User manual

RTH2300/RTH221
Programmable Thermostat
Quick Installation Guide
69-2448ES-03

69-2448ES—03 ii
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.

1 69-2448ES—03
RTH2300/RTH221
1Turn Off Power to Heating/
Cooling System
M28097

69-2448ES—03 2
Quick Installation Guide
Remove Old Thermostat
2
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.

3 69-2448ES—03
RTH2300/RTH221
If any wires are not attached to your old thermostat or are
attached to a terminal marked Cor 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 Wires
3
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
wires.
Do not use C or C1 wires.
Identify and label each wire.
IGNORE WIRE COLORS:
Use terminal screw
designations to identify
wires.

69-2448ES—03 4
Quick Installation Guide
Mount New Wallplate
Loosen the locking screw at the bottom of the1. 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.
Pass the wires through the large opening located at
5. the bottom center of the wallplate as per Figure 2.
Secure the wallplate to the wall with supplied mounting
6. screws as per Figure 3.
Connect the wires to the terminals.
7.
4
Figure 1 Figure 2 Figure 3
M32154

5 69-2448ES—03
RTH2300/RTH221
Connect Wires (typical wiring)
Loosen the terminal screws using a screwdriver, insert2. 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 the1. same letter.
O/B Y RC R G W
M32155
A
REMOVE JUMPER
IF YOU HAVE BOTH
RAND RC WIRES

69-2448ES—03 6
Quick Installation Guide
Connect Wires (alternate wiring)
5
If labeled wire does not match any terminal designation, see
diagram below.
M32169A
REMOVE JUMPER BETWEEN RAND RC IF YOU HAVE
WIRES ON BOTH RAND 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 W
2 33 1
1
OR
C1
X
B
OR
B
H
OR
Y1
M
OR
RH
4
V
OR
F
OR
W1
H
1
OR
R

7 69-2448ES—03
RTH2300/RTH221
Set jumper JP1, on the back of the thermostat, if you
have connected a wire to the G terminal.
Set Heating Fan Control
6
HG Leave the jumper in this factory-set position if
you have a gas or oil furnace.
HE Place 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 furnace has enough time to
heat up the air.
JP1

69-2448ES—03 8
Quick Installation Guide
Set jumper JP2, on the back of the thermostat, if you
have a heat pump.
Set Heat Pump Reversing Valve
7
O Leave the jumper in this factory-set position if
you have connected O wire to the O/B terminal.
B Place 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