Honeywell rth230b - User Manual

RTH230B 69-1800 2/6/05 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: These thermostats are 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.
n 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.
o Identify and label each wire (with the corresponding letter on
the wire terminal) and remove them from the terminals.
p If necessary, strip the end of each wire (maximum of 1/4 inch).
q Wrap the wires around a pencil to prevent
them from falling into the wall.
r 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.
n Remove the thermostat faceplate.
o Loosen the locking screw to separate the thermostat from its
baseplate (the screw cannot be completely removed).
p Tilt the thermostat upwards.
q Mark and bore the appropriate mounting holes (or use the
existing holes). Insert the plastic anchors.
r 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
GFan

Summary

Introduction to Honeywell RTH230 B Thermostat

Honeywell RTH230 B Thermostat Installation Guide

2.1 Removing the Old Thermostat

Safely disconnect and label wires from the existing thermostat before removal.

2.2 Installing the New Baseplate

Select an optimal location and securely mount the new thermostat baseplate.

2.3 Connecting the Thermostat Wires

Connect heating, cooling, and fan wires according to system type and jumper settings.

2.4 Setting J2 Jumper

Configure the J2 jumper for specific furnace types and fan operation modes.

2.5 Installing the Batteries

Install AA batteries, observing polarity, and verify thermostat initialization.

2.6 Completing the Installation

Mount thermostat onto baseplate, secure with screw, and restore system power.

Honeywell RTH230 B Basic Functions and Operation

3.1 System Operating Mode

Select between Heating (HEAT), Cooling (COOL), or Off system modes.

3.2 Fan Operating Mode

Choose between automatic fan operation or continuous ON mode.

3.3 Displaying and Setting Temperature

View actual temperature and adjust desired setpoints using up/down buttons.

3.4 Thermostat Control Modes

Switch between Manual/Permanent Hold and Programmable modes, including temporary bypass.

3.5 Filter Replacement Indicator

Monitor filter usage and reset the indicator after filter replacement.

Honeywell RTH230 B Configuration Menu Settings

4.1 Accessing and Navigating Configuration

Learn to access, navigate, modify, and exit the thermostat's configuration menu.

Honeywell RTH230 B Programming and Schedule Settings

5.1 Setting the Time and Day

Configure the current time and day for accurate scheduling.

5.2 Energy-saving Schedule

Understand the default energy-saving schedule for heating and cooling periods.

5.3 Modifying the Schedule

Customize daily temperature setpoints and start times for programmable periods.

Honeywell RTH230 B Technical Specifications

Honeywell RTH230 B Warranty Details

Honeywell RTH230 B Customer Support

Honeywell rth230b Specifications

General

Stages	1 Heat/1 Cool
Voltage	24 VAC
Temperature Range	40°F to 90°F (4°C to 32°C)
Type	Digital
Display	LCD
Power Source	Battery
Compatibility	Single Stage Systems