oventrop Uni LH Mode D'emploi page 5

The Oventrop Quality Management System
is certified to DIN-EN-ISO 9001
Contents:
Page 5 General information
Valve installation
Thermostat installation
Figures and symbols on the thermostat
Page 6 Limiting the control range
Page 7 Blocking the temperature setting
Recalibration
Cancellation of limitation or blocking
Page 8 Replacement of the gland nut
Checklist for faults
General information
Thermostatic radiator valves control the room tempera-
ture by modifying the flow of hot water through the ra-
diator. Often, there is only a minimum requirement for
heat (especially in transition periods) and so the ther-
mostats only open the valves a small amount. Conse-
quently flow noises could occur due to high differential
pressures. To prevent these noises, measures should be
taken to influence the differential pressure; for example
by using adjustable circulation pumps, manually adjusta-
ble bypass pipes, differential pressure regulators or diffe-
rential pressure relief valves.
It is recommended to adjust the temperature of the sup-
ply pipe to the outside temperature, preferably by using
a weather guided temperature controller.
Fur further information see "User instructions" and
technical data sheets "Thermostats" and "Ther-
mostatic radiator valves".
Valve installation
The radiator valve should be installed so that the ther-
mostat is in a horizontal position and a good circulation
of air is guaranteed. If this is not possible, a thermostat
with remote sensor or with remote control should be
used. It is most important that capillaries are not kinked
or flattened.
The radiator valve is installed in the supply pipe to the ra-
diator, with the flow in the direction of the arrow.
When using compression fitting, the thread of the fitting
and the compression ring are slightly oiled at works. Do
not use any additional lubricant Do not allow the oil or
lubricant to come into contact with the EPDM valve disc.
EPDM is not oil resistant.
Only use Oventrop compression fittings.
It is important that the pipes are cut to the correct length
at a right angle to the centre line. The ends of the pipe
must be free of burrs and undamaged.
Reinforcing ring
Compression Compression nut
ring
EN
Compression fitting before
tightening. Remove pipe
insulation far enough.
Pipe shape after tightening.
Valves, controls + systems
Thermostatic radiator valves
Thermostats "Uni LH" and "Uni LD"
When using thin walled and very soft pipes, reinforcing
sleeves have to be used. The reinforcing sleeve supports
the pipe and provides the strength to enable the neces-
sary compression. Reinforcing sleeves cannot be used on
pipe with welded seams. The recommendations of the
pipe manufacturers have to be observed in any case. If
necessary, a practical "test" has to be carried out.
The special fittings "Cofit" may be used for the Oventrop
composition pipe "Copipe". The installation instructions
supplied with the fittings must be observed.
All radiators and pipework must be flushed thoroughly to
prevent any problems caused by welding beads or dirt.
When converting old heating systems, it is recommended
that a plastic strainer should be fitted at the inlet port of
all radiator valves.
Do not fit the thermostat until all building work has been
completed. During construction period, the valve can be
operated with the screwed cap. The screwed cap is not
to be used for permanent shut-off of the valve against sy-
stem pressure (e.g. while radiator is removed). In this
case protect the valve outlet with a metal cap.
Thermostat installation
To ensure an easy installation, the handgrip must be ope-
ned to the maximum position (figure "5"). In this positi-
on, the collar nut ("Uni LH") or the squeeze connection
("Uni LD") of the thermostat may be easily fitted to the
valve body.
Turn the thermostat so that the indicator mark is facing
up. Hold in this position and tighten collar nut without
using excessive force.
Figures and symbols on the thermostat
(0 = complete shut-off
This symbol is only to be found on
thermostats with a shut-off facility)
= Frost protection symbol
in this position the valve opens automatically when
room temperature drops below 7 °C.
1 = about 12 °C
2 = about 16 °C The minor graduations
3 = about 20 °C between the figures 2 - 4 represent
4 = about 24 °C a change of room temperature of
5 = about 28 °C about. 1 °C.
Installation instructions
Collar nut "Uni LH" or
squeeze connection "Uni LD"
Tactile setting device
Indicator mark
Minor graduation
Direction "warmer"
Basic setting "3", about 20 °C
Direction "colder"
Graduation figure
Tactile setting device
Handgrip
Memory disc
5