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
S E
R
I N
S T
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
