Honeywell TheraPro HR90 Instruction Manual page 5

Securing the radiator controller
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The radiator controller and the batteries can be
secured against removal by using the supplied
screws.
Setting the position of the display
In order to improve the legibility the display of the
radiator controller can be tilted to different positions
(10°, 20°, 30°, 40°).
The angle of 40° can be fixed with the supplied display
support.
1.
2.
Mounting
1. Lift the display and set it to the desired angle.
2. If desired, tilt the display by 40° and slide the display
support from above between the display and the
housing until it latches in.
Unmounting
fPress the display support in at the back and remove
it upwards.
Connecting optional sensors and window
contact
The following external sensors and window contacts can
be connected to the HR90 radiator controller:
• HCW23 setpoint adjuster
• RF20 room sensor
• HCA30 floating window contact
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The ACS90 cable is required to connect external
sensors and the window contact.
• Micro B mini-plug / open ends
• 2 m long
• Not included in the scope of delivery
Operation with HCW23 setpoint adjuster
The room temperature is measured by the
HCW23 setpoint adjuster. The HR90 internal room
temperature sensor is not used in this particular
application. The adjustment dial of the HCW23 can be
used to change the room temperature ±12 K as an offset
to the temperature set/programmed at the HR90. The
offset setting remains valid until it is changed again.
Operation with RF20 room sensor
The room temperature is measured by the external
RF20 room sensor. The HR90 internal room temperature
sensor is not used in this particular application.
Operation with window contact
When the window is opened, the window contact is
opened and the radiator valve closes. When the window
is closed again, the radiator controller returns to normal
operation.
The frost-protection function ensures that the radiator
valve opens when the temperature drops below 5 °C.
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• When de-installing a connected room sensor RF20
or room unit HCW23, remove the batteries and
insert them again to avoid error messages.
• When de-installing the window contact, change
parameter 17 to 1 or 0, see section 9.
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