Range limiting – RT212/RT313/RT414 and TRV4
If it is required to limit the range, proceed as follows:
1. Remove the sensor from the valve body by unscrewing the ring nut.
2. Set the sensor to frost *.
3. TRV4
Re-position the
removable tubular
pin (see diagram) to
the hole
corresponding to the
desired scale
number.
E.g. To limit the
range to setting
number 4, insert the
tubular pin in hole
number 4.
3. RT212/RT313/RT414
Re-position the
removable peg (see
diagram) to the shut
off temperature
required.
E.g. To limit the
range to 22°C insert
the peg into slot
number 22 (this
corresponds with the
number 4 in the
window).
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
0
Removable
peg
Operational checks
If you feel you are not getting the control you should expect, test as
follows:-
If room temperature is deficient:
1. Open valve fully by turning setting to ‘MAX’ and allow time for radiator
to fully heat the room. If heat is still not sufficient, slacken the ring nut
and remove the head completely. This allows the valve to open fully. If
the room still fails to warm sufficiently, the deficiency is not due to the
thermostatic radiator valve and further investigation of the system is
needed.
If room temperature if excessive:
2. Turn to setting symbol * leaving time for the room heat to dissipate. If
the radiator fails to go cold, the excessive condition could indicate some
scale or obstruction on the valve seat, preventing it from closing fully. In
this case, consult your heating engineer.
MOUNTING
When using jointing compound, care must be taken to avoid any excess
being transferred to the valve seat, as this could cause malfunction of the
valve.
DO NOT FIT CAPILLARY FITTINGS
near to these valves as excessive heat
from a blowtorch may damage the internal valve components. The
maximum temperature of the Thermostatic Head is 50°C
Operation
The valve can be set to control over a range of temperatures from 10°C to
27°C which are denoted by numbers on the setting scale.
The valve leaves the factory set on number 4.
When selecting a different number, wait at least an hour before checking
the result of the change in terms of room comfort and when the ideal
number has been found, the sensor should always be left at that number.
CAUTION:
When removing the radiator, always first unscrew the
thermostatic sensor and close the valve using a manual cap. The maximum
static pressure against which the isolating cap will seal is 6 bar (88 psi,
204 ft. head).
Never use the thermostatic sensor to close the valve for radiator removal.
The lockshield valve must be closed by first removing the plastic cap and
turning the spindle fully clockwise.
Assembly of thermostatic sensor to valve body
1. Turn the setting adjuster to “MAX” for TRV4 or “6” for RT212/RT313/RT414.
2. Screw the ring nut onto the valve body, making sure that the raised
ridges (serrations) on the body section engage with the ridges in the
sensor section.
3. Before fully tightening the ring nut, rotate the sensor so that the setting
number is in view. Then tighten the ring nut by hand whilst holding the
sensor in that position.
DO NOT OVERTIGHTEN. MAXIMUM TIGHTENING TORQUE 30 Nm.
Frost protection
Frost protection can be obtained by setting the sensor to the symbol *.
The valve will then automatically open when the space temperature falls
below approx. 8°C
TRV4
RT212/RT313/RT414
Continued overleaf
Thermostatic
radiator
valve
Setting knob
Window
Bezel
Ring nut
Lockshield
valve
06490029001
E
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