Honeywell RTH230B manual

Honeywell RTH230B
9.2 · 2
PDF manual
 · 4 pages
English
manualHoneywell RTH230B
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

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General
BrandHoneywell
ModelRTH230B
Productthermostats
LanguageEnglish
FiletypeUser manual (PDF)

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