Honeywell RTH230B Owner's Manual
Honeywell RTH230B - 5-2 Day Programmable Thermostat Manual
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Honeywell RTH230B manual content summary:
- Honeywell RTH230B | Owner's Manual - Page 1
User Guide 1. Introduction The RTH230B programmable thermostat can be used to control: • a gas, fuel oil or electric furnace - 2 or 3 wires • a central air conditioner - 2 or 3 wires • a hot water system with or without pump - 2 wires • a millivolt system - 2 wires • a central heating and cooling - Honeywell RTH230B | Owner's Manual - Page 2
When the thermostat is placed in cool mode, the fan works only when cooling is activated. • When the thermostat is placed in heat mode, the fan is controlled by the furnace fan control circuitry. 2.5 Installing the Batteries Pull out the battery cover. Install the batteries as shown. Observe - Honeywell RTH230B | Owner's Manual - Page 3
filter is replaced, press [ Filter ] for 3 seconds to remove the icon and reset the counter. 3.7 Battery Replacement Indicator An icon appears when the batteries need replacement. This icon will flash for 120 days, then the thermostat will cut power to the heating/cooling unit. The icon disappears - Honeywell RTH230B | Owner's Manual - Page 4
, the heating setpoint and the cooling setpoint. Note: If you wish to use only 2 periods, set periods "1 and 4" or periods "2 and 3". Early Start will not work if you set periods "1 and 2" or periods "3 and 4". Press [ Pgm ]. The settings for period 1 are displayed. Period start time Program days
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1 -
2 -
3 -
4
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RTH230B
69-1800—03
03-11
1/4
The RTH230B programmable thermostat can be used to control:
•
a gas, fuel oil or electric furnace - 2 or 3 wires
•
a central air conditioner - 2 or 3 wires
•
a hot water system with or without pump - 2 wires
•
a millivolt system - 2 wires
•
a central heating and cooling system - 4 or 5 wires
Note
: This thermostat is not compatible with heat pumps or multi-
stage systems.
Features
•
System operating mode selection: heat, cool or off
•
Fan operating mode selection: automatic or on (continuous)
•
Programmable heating and cooling cycle lengths: 10, 12, 15, 20
or 30 minutes
•
Temperature display in °F or °C
•
Battery replacement indicator
•
5-2 programming including:
- Preprogrammed energy-saving schedule
- Early Start
- Temporary bypass
- Time display (12 h or 24 h)
•
Filter replacement indicator
2.1
Removing the Old Thermostat
IN ORDER TO AVOID ANY RISK OF ELECTRIC SHOCK, CUT
POWER TO THE HEATING SYSTEM.
Remove the old thermostat to access the wires.
Warning
: If the old thermostat was mounted onto an electrical box,
it was probably powered by 120/240 volts. In this case, this thermo-
stat cannot be used.
Identify and label each wire (with the corresponding letter on
the wire terminal) and remove them from the terminals.
If necessary, strip the end of each wire (maximum of 1/4 inch).
Wrap the wires around a pencil to prevent
them from falling into the wall.
If the hole in the wall is too big, insulate it
using a non-flammable material in order to
avoid air draughts behind the thermostat.
2.2
Installing the New Baseplate
For a new installation, choose a location approximately 5 feet
(1.5 m) above the floor and on an inside wall. Avoid draughty
areas (top of staircase, air outlet, etc.), dead air spots (behind
doors), direct sunlight or areas near concealed pipes or chim-
neys.
Remove the thermostat faceplate.
Loosen the locking screw to separate the thermostat from its
baseplate (the screw cannot be completely removed).
Tilt the thermostat upwards.
Mark and bore the appropriate mounting holes (or use the
existing holes). Insert the plastic anchors.
Pass the wires through the opening of the baseplate and fix the
baseplate to the wall using the screws provided.
2.3
Connecting the Thermostat
The connection of the new thermostat should be similar to that of
the old thermostat; however, it can vary depending on the installa-
tion.
Note
: The red jumper wire between the Rc and Rh terminals must
be removed in 2- or 5-wire installations. The jumper must be used in
3- or 4-wire installations if you wish to use the mode selector switch
for the fan.
1. Introduction
2. Installation
RTH230B
Programmable Electronic Thermostat
Installation and User Guide
Display
Adjustment
buttons
System operating
mode selector
Fan operating
mode selector
Programming
buttons
Rh
Heating power supply
Rc
Cooling power supply
W
Heating signal
Y
Cooling signal
G
Fan
69-1800-03