TERMORETT TRV 300 1-10-5 - TA Hydronics

Function
TRV 300
When the ambient temperature rises above the set value of the thermostat, the fluid in the sensor expands and starts to close the
valve.
When the ambient temperature falls below the thermostat‘s set value, the fluid in the sensor contracts and the return spring in the
valve starts to open the valve. When set to the frost protection position (*), the valve opens at a temperature of about 6°C in order
to prevent the heating system from freezing.
NB:
If the TRV 300 with integral sensor is fitted vertically to a valve, with the sensor upwards, it may be affected by the heat from the
pipe below and therefore close too early.
In such cases, a thermostatic unit with a remote sensor should be used, with the sensor placed immediately beneath the radiator
if possible or, if not, in the centre of the room.
The scale on the thermostat represents a temperature change of 4°C between each numeral. Each mark on the scale represents
a 1°C change.
Thermostatic head with remote sensor for pocket tube or heat transfer cradle
When the water temperature rises above the thermostat’s set value, the thermostat start to close the valve.
When the water temperature falls below the set value, the return spring in the valve start to open the valve.
Maximum temperature restriction
Set the index opposite to the maximum room temperature required. E.g. number 3 corresponding to 20°C room temperature.
1. Put the restriction pin in a little way opposite to number 5 to mark the correct pin position. Close the thermostat a little by turning
it clockwise.
2. Fully insert the restriction pin.
3. Open the thermostat by turning it anti-clockwise and check that the index stops at a position corresponding to desired room
temperature.
Nominal temperature range
The specified temperatures apply at the nominal lift height in accordance with CEN. Under normal operating conditions, the set
temperature will be maintained with a maximum deviation of ±1K.
Setting scales
The closing temperature is normally 2K higher than ambient temperature.
Thermostatic head with integral sensor / remote sensor
The various settings give approximately the following room temperatures:
Thermostatic head, protective model
The various settings give approximately the following room temperatures:
Thermostatic head with remote setting / remote setting and remote sensor
The various settings give approximately the following room temperatures:
Thermostatic head with remote sensor for pocket tube or heat transfer cradle
The settings produce approximately the water temperatures shown on the thermostatic head.
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