Honeywell RTH230B Programmable Electronic Thermostat User Guide

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2

3

4

 Wrap the wires around a pencil to prevent  

RTH230B  

Programmable Electronic Thermostat  

Installation and User Guide  

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  

1. Introduction  

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.  

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.  

Adjustment  

buttons  

Display  

 Remove the thermostat faceplate.  

 Loosen the locking screw to separate the thermostat from its  

baseplate (the screw cannot be completely removed).  

Programming  

buttons  

System operating  

mode selector  

Fan operating  

mode selector  

 Tilt the thermostat upwards.  

Features  

 Mark and bore the appropriate mounting holes (or use the  

• System operating mode selection: heat, cool or off  

existing holes). Insert the plastic anchors.  

• Fan operating mode selection: automatic or on (continuous)  

 Pass the wires through the opening of the baseplate and fix the  

baseplate to the wall using the screws provided.  

• Programmable heating and cooling cycle lengths: 10, 12, 15, 20  

or 30 minutes  

2.3 Connecting the Thermostat  

• Temperature display in °F or °C  

• Battery replacement indicator  

• 5-2 programming including:  

The connection of the new thermostat should be similar to that of  

the old thermostat; however, it can vary depending on the installa-  

tion.  

- Preprogrammed energy-saving schedule  

- Early Start  

- Temporary bypass  

- Time display (12 h or 24 h)  

Rh  

Rc  

W

Y

Heating power supply  

Cooling power supply  

Heating signal  

Cooling signal  

Fan  

• Filter replacement indicator  

2. Installation  

G

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.  

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).  

69-1800-03  

RTH230B  

69-1800—03 03-11 1/4  

firealarmresources.com  

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General	Details
Name	Honeywell RTH230B Programmable Electronic Thermostat User Guide
Make	Honeywell
Language	English
Filetype	PDF (Download)
File size	0.48 MB

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• ALL THERMOSTAT INSTRUCTIONS & USER MANUALS
• Honeywell

Honeywell RTH230B Programmable Electronic Thermostat User Guide Overview

Summary of Contents

• Page 1: 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 to avoid air draughts behind the thermostat. For a new installation, choose a location approximately 5 feet above the floor and on an inside wall. The RTH230B programmable thermostat can be used to control various heating and cooling systems. This thermostat is not compatible with heat pumps or multi-stage systems. The connection of the new thermostat should be similar to that of the old thermostat. The red jumper wire between the Rc and Rh terminals must be removed in 2- or 5-wire installations. In order to avoid any risk of electric shock, cut power to the heating system. Identify and label each wire with the corresponding letter on the wire terminal before removing them. If necessary, strip the end of each wire (maximum of 1/4 inch).
• Page 2: 2-wire heating: The jumper defines the fan operation when the fan is placed in automatic mode. Use this setting if you have an electric furnace. Heat relay: In this setting, when the fan is placed in automatic mode, it works only when heating or cooling is activated. 2-wire cooling: When the thermostat is placed in cool mode, the fan works only when cooling is activated. 3-wire heating: After the batteries are installed, the thermostat performs a series of tests for approximately 5 seconds. 3-wire cooling: The thermostat will display the ambient temperature once it is installed on the wall. 4-wire heating and cooling: Once the baseplate and the batteries are installed, mount the thermostat on the baseplate. Basic functions: Use the selector switch to place the system in Heating mode or Cooling mode, or to set the system off. Note: When you place the thermostat in Cooling mode, you might need to wait up to five minutes before cooling can start.
• Page 3: Fan operating modes include automatic and continuous settings. An icon indicates when batteries need replacement, flashing for 120 days before cutting power to the unit. After battery replacement, only the time and day need to be readjusted. The fan operates differently based on the type of furnace; it works only when heating or cooling is activated for electric furnaces. The configuration menu can be accessed by pressing both buttons simultaneously. The actual temperature is displayed, and the setpoint can be viewed by pressing the buttons briefly. The thermostat can be set to manual or programmable modes, maintaining temperature according to a schedule. A temporary bypass allows for a modified temperature for two hours before returning to the scheduled settings. An icon appears after 500 hours of operation to indicate the filter needs replacement.
• Page 4: Energy-saving schedule is preprogrammed to control heating or cooling systems automatically. Power supply requires 2 AA batteries. Setpoint range for heating is 41 to 82°F (5 to 28°C) and for cooling is 59 to 95°F (15 to 35°C). Heating/cooling cycle lengths are programmable for 10, 12, 15, 20, or 30 minutes. Honeywell warrants the product for one year from the date of purchase against defects in workmanship or materials. The warranty does not cover removal or reinstallation costs. You can program up to 4 periods per day with individual temperature settings. To use the schedule, the thermostat must be in programmable mode. This warranty is the only express warranty provided by Honeywell. For customer assistance, contact Honeywell Customer Care.