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6.2
Initial operation
6.2.1 Advice regarding protection cap
The fitting is supplied with a plastic protection cap.
The cap protects the valve stem and can be used to
operate the thermostatic valve during the construction
period.
NOTICE
The protection cap must not be used for
permanent shut-off of the thermostatic valve
against system pressure (for instance while
radiator is removed). The high restoring force of
the valve stem will cause damage to the
protection cap. Protect the outlet of the fitting
with a metal cap or install a bridging fitting.
Oventrop bridging fitting, e.g. item no. 1016452
6.2.2 Flushing of the pipework
1. Remove protection cap of the thermostatic valve
to open the valve completely.
2. Set valve to the highest presetting, i.e. "9".
3. Flush pipework thoroughly to avoid malfunctions
caused by impurities.
4. Once flushing has been completed, restore initial
presetting.
5. Refit protection cap or mount thermostat.
6.2.3 Presetting of the valve (only for two pipe
operation)
Set presetting to the required value by use of a
13 mm spanner or the special key (item no. 1183962).
The required setting must be in line with the marking
(see. illustr. 4). The presetting is infinitely adjustable
between "1" and "9" and can be modified whilst the
system is in operation; water will not escape.
Presetting
value
Illustr. 4 Presetting
10
6.3 Thermostat installation
1. Turn the handgrip of the thermostat anticlockwise
2. Align the thermostat so that the indicator mark
3. Screw the collar nut of the thermostat onto the
4. Tighten the collar nut firmly by use of a spanner
6.4
6.4.1 Use in two pipe systems
As the fitting is supplied for two pipe operation is
does not require any modifications except for the
presetting (see point 6.2.3).
6.4.2 Use in one pipe systems
1. For one pipe operation, set the presetting at the
2. Remove lateral cap (spanner size 17) at the
3. Turn conversion stem (spanner size 4) from
4. Refit cap (spanner size 17).
Marking
Illustr. 5 Conversion to one pipe operation
NOTICE
Do not fit the thermostat until all building work
has been completed to avoid damage to the
thermostat.
until figure "5" is in line with the indicator mark.
faces upwards or is well visible.
thread of the thermostatic valve and hand tighten
the collar nut.
(size 32). Now set the thermostat to the required
room temperature.
NOTICE
Do not use excessive force during thermostat
installation to avoid damage to the thermostat
and the thread.
Conversion from two to one pipe operation
valve insert to position "9" (factory setting).
pipework connection nipples.
the shut position to the required radiator share
according to the chart for one pipe operation by
turning it anticlockwise (see illustr. 5) (isolating
stem in open position).
Conversion stem
Spanner size 4
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