Operating instructions

10. Mounting the ‘FHT8V’ valve operating mechanism

To save you from having to laboriously read through several user manuals (heating control and

valve operating mechanism) we have included information on how to mount and start up the

‘FHT8V’ valve operating mechanism on the following pages.

The valve operating mechanism is not supplied with the heating control and must

be ordered separately.

a) Removing the old thermostats

• Remove the old mechanical thermostats.

• If any of the screw connections have seized up you can use

multigrip pliers. Release the thermostats by turning anticlock-

wise.

b) Inserting the batteries into the valve operating mechanism

• Remove the battery compartment cover of the valve

operating mechanism by sliding it down and out.

• Insert two AA batteries into the battery compartment.

Make sure that you observe the correct polarity when

you insert the batteries. See the figures in the battery

compartment and in the image on the right.

•‘

C1C1

C1’ is displayed, followed by a two-digit number. ‘

C2C2

C2’

is then displayed, followed by another two-digit number.

These two numbers are the currently stored 2-part

security code of the valve operating mechanism (11

and 22 = security code 1122, for example).

• A signal tone is then generated and ‘

A1A1

A1’ is displayed.

• The valve operating mechanism fully retracts the

control pin to facilitate mounting.

• After this ‘

A2A2

A2’ is displayed.

Figure 9

Figure 10