Technical Specifications
Location of the Valve
The OPTIMA reversible thermostatic radiator valve may be fitted in the flow or return pipe of the central heating system. The valve should be positioned so that the control head can detect the temperature of the air in the room. The sensor must not be shielded by curtains or other similar obstructions and should not be exposed to direct sunlight or draughts. It is not recommended for a TRV to be placed in a room which already has an existing wall mounted thermostat. The white control head and Chrome valve body contained in this box must not be separated; they are a calibrated pair and MUST be used in conjunction with each other. Failure to adhere to these guidelines may affect the operation of the valve.
Installation
The manual closing cap is provided with the valve to protect the valve during installation and to open and close protect the valve during commissioning of the system.
1) Install the manual closing cap and screw down sufficiently to close the valve. Do not over-tighten.
2) Screw the 1.2" BSP tail into the radiator using suitable jointing compound or tape.
3) Connect the valve body to the tail in the desired orientation. The valve may be used with the control head either vertical or horizontal. Tighten the securing nut.
4) Fit the copper connecting tube to the valve and tighten the connecting nut. For 10mm diameter pope use the reducing set. (Brassware Sales part number 315101)
5) The manual closing cap may be used to control the opening of the valve by hand during commissioning.
6) After commissioning to move the manual closing cap and store it in a safe place for future use.
7) Turn control head to fully open position (position '5')
8) Push the control head onto the valve body ensuring that the set point symbol 
is in the correct position and can be seen easily. Make sure that the plastic location lugs are engaged with the hexagon on the top of the valve. Then tighten the knurled securing ring by hand. DO NOT use grips. DO NOT rotate the control head during tightening. Failure to follow these instructions may damage the control head and render the guarantee void.
9) The radiator must now be balanced to ensure a uniform temperature throughout the radiator and optimum operation of both TRV and radiator.
10) To avoid flow related noise it is strongly recommended the differential by -pass valve to ensure the pump pressure does not exceed 0.2bar under all operating conditions.
User Instructions
The control head contains a temperature sensor which controls the opening and closing of the valve to keep the room temperature at a constant level. The control head is provided with calibration marks which correspond to the temperatures in the following table.
Setting the Temperature
Select the desired room temperature from the table above and turn the control head to align the appropriate number with the set point symbol on the fixed part of the head. Allow at least one hour for the room temperature to stabilise. To change the room temperature, re-adjust the setting and allow at least one hour for the temperature to stabilise.
Fixing the Temperature
To prevent tampering, the control head can be fixed in any desired position. To fix the valve setting, turn the head to the desired position. Insert the locking pegs in the holes underneath the '5' and the '*' marks, which are located on the underside of the control head.
The head is now locked in the selected position until the locking pegs are removed.
Frost Protection
If heating is not required, there is a danger of freezing. The valves may be turned to the frost protection setting '*' which will allow the valves to open if the temperature falls below 6 degrees C. (Locking may need to be removed to allow this adjustment). Note that the boilers must remain operational, controlled by a frost protection thermostat.
Radiator removal
To remove a radiator it is necessary to use the manual shut-off cap supplied with the valve. Remove the control head and substitute the manual shut-off cap. Close the valve manually and proceed in the normal manner. If the control head is used to close the valve, there is a danger of water damage if the temperature falls and the valve re-open unexpectedly.
Summer Operation
If the heating system is to be turned off for a lengthy period (e.g. during the summer months), it is recommended that all TRV are set to the fully open position. (If may be necessary to remove the locking pegs for this adjustment).
