Delabie SECURITHERM H9739 Manual De Instrucciones página 11

THERMAL SHOCK (Fig. C & D)
• It is possible to activate a thermal shock at the temperature of the hot water in the system.
• SECURITHERM is designed to withstand thermal shocks up to 85°C.
Models: H9739/H9739S, H9741/H9741S and H9742S.
- Press the red button  using a 4mm max. diameter tool  (the 40°C maximum temperature setting
for models H9739/H9739S and the 41°C maximum temperature setting for models H9741/
H9741S/H9752S will override).
- Turn the knob through 180° to achieve the temperature supplied by the system.
• The cold water can be isolated without having to shut-off the hot water.
• Once the thermal shock has been undertaken, don't forget to turn the control knob
to the left (to reset the maximum hot water security setting).
TMV3 model H9741TP:
- Unscrew the temperature adjustment cap  using a 2.5mm Allen key (Fig. D).
- Turn the valve spindle  (Fig. D) clockwise all the way to the right to override the temperature setting
and achieve the hot water temperature supplied by the system.
• The cold water can be cut-off without isolating the hot water.
• IMPORTANT: Once the thermal shock treatment is complete, reset the temperature to reactivate
the maximum hot water security setting.
- Check that the water supply and pressure are in the correct range (see Table 1 above).
- Re-commission the mixing valve ensuring the temperature is in the correct range.
- Replace the cap  and check that the temperature does not exceed 41°C.
• The cold water can be isolated without having to shut-off the hot water.
• Once the thermal shock has been undertaken, don't forget to turn the control knob
to the left (to reset the maximum hot water security setting).
• ALWAYS carry out a cold water fail-safe check after any adjustment.
• SECURITHERM is designed to withstand thermal shocks up to 85°C.
IN-SERVICE TESTING
To comply with the National Health Service Model Engineering Specification DO8 and BuildCert TMV3
certification DELABIE recommends the following.
The purpose of in-service tests is to regularly monitor and record the performance of the thermostatic
mixing valve.
Carry out the procedure in Calibrating the Temperature above using the same equipment or the same
specifications. If the mixed temperature has changed significantly, from the previous test (e.g. > 1°C),
record the change and before re-adjusting the mixed water temperature, check:
• That the in-line filters are clean.
• The check valves or other anti-back siphonage devices are in good working order.
• Any isolating valves are fully open.
• Check the balance between hot water and cold water (DP < 1 bar).
• Remove and clean the thermostatic cell.
With an acceptable mixed water temperature, complete the procedure as set out in Calibrating
the Temperature above. If the final mixed water temperature is greater than 43°C, the system requires
service work.
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