Manual Horstmann HRT3 Thermostat

Manual

Model HRT3 Room Thermostat

that respond to an electrical on/off signal.

Features

Installation Instructions

sources and direct sunlight.

H

R

T

3

I

N

S

T

A

L

L

A

T

I

O

N

/

U

SE

R

I

N

ST

R

U

C

T

I

O

N

S

between 5°C and 35°C.

Wiring Instructions

N

LOAD (HEAT)

DO NOT USE

L (LINE)

Room thermostat key:

L

Load

N

Important:

thermostat it is essential that terminal

4 is connected to neutral.

To ensure correct operation of this

Failure to provide this connection will

result in incorrect and random switching.

HORSTMANN

= Mains/Live supply

= Call for heat

= Neutral

pic.1

pilot lamp

fissure for screwdriver

screwdriver

knob

top cover

screws

base

wall

screw

61

To remove the knob

Turn the knob to the maximum temperature position (35°).

Insert the blade of a screwdriver in the fissure between

Good looking and reliable, this Horstmann room thermostat is suitable for all mains operated central heating systems

A bimetallic sensor ensures excellent response to temperature changes and the simple rotating dial allows setting

Should be mounted directly onto the wall using built in patress (see pic.1). It should be located in a regularly heated

area about 1,5m above floor level. It should not be exposed to draughts, and should be away from internal heat

92L01 -ED.2

Horstmann Controls Limited

Bristol

t:0117 9788 773 - f:0117 9788 701

Specification

SPST contacts

Switching Capacity 10 amps (resistive) at 230V AC

Switching Differential: Approx 0.5°C

Enclosure protection: IP20

E-mail : [email protected]

Website: www.horstmann.co.uk

pic.2

pic.3

screwdriver

screwdriver

fixing hook

screw

the knob and the top cover.

Use the screwdriver as lever to remove the knob (see pic.2).

To remove the top cover.

Remove the cover retaining screw situated behind the control knob.

Then press lightly with a screwdriver on the fixing hooks either

side and remove cover (see pic.3).

BS4 1UP

61

60

NOTES

Type of disconnection: micro - disconnection

Group of insulation: IIIa

Overvoltage: II 1500 V

Duration of electric stress for insulation parts: long period

Number of cycles: 200.000

Rating

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