Delabie SECURITHERM 792BOX-792218 Manual Download Page 11

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CALIBRATING THE TEMPERATURE (Fig. AD)

Our mixing valves are set at the factory using 3 bar (300kPa) pressure, with the hot and cold water pressure balanced
at the inlets, and with the hot water at 65°C (±5°C), and cold water at 15°C (±5°C).
If the conditions of use differ from this, the mixed water temperature may vary from the temperature pre-set
at the factory. The control knob

should be repositioned to the corresponding temperature:

•  Make sure there is a means of channelling the water at the shower head.
•  Turn the shower on and measure the temperature using a digital thermometer.
•  Remove the escutcheon

and the screw

• Remove the control knob

and the inserts

and

. Do not unscrew the nut

• Turn the serrated spindle

anti-clockwise to increase the temperature or clockwise to decrease the temperature.

• Replace the insert

and align the groove

with the one on the index ring

• Replace the insert assembly, control knob, screw and escutcheon so that the corresponding temperature

at the outlet (HW 38°C) is opposite the groove on the insert

THERMAL SHOCK (Fig. AD)

Thermal shocks are possible at the temperature of the hot water in the system:
• Remove the escutcheon

and the screw

• Remove the control knob

and the inserts

and

. Do not unscrew the nut

(we recommend removing the wall plate beforehand for easier access).

• Turn the serrated spindle

anti-clockwise to achieve the maximum temperature of the hot water in the system.

• The cold water can be isolated without also shutting off the hot water.
• Once the thermal shock is complete, recalibrate the temperature.

HOW TO OPERATE ELECTRONIC MODELS

• Controlled by infra-red presence detection:

- The flow opens when hands are detected 4cm from the sensor.
- The flow stops on-demand when hands are detected for a second time in front of the sensor or after 1 minute
of flow (security time flow).

• Automatic duty flush every 24 hours after the last use:

This 60-second duty flush reduces the risk of Legionella, preventing water stagnation and bacterial development
in the pipe work.

MAINTENANCE

• Check and recommission the temperature at least twice per year.
• Check the anti-scalding failsafe approximately every two months: shut off the cold water supply and check

that the hot water shuts in less than 3 seconds.

• To prolong the life of thermostatic mixing valves and to reduce the risk of Legionella we recommend checking

the following parts once a year:
1. Non-return valves and filters: de-scale and replace worn or damaged parts.
2. Interchangeable cartridge (

Fig. AA, AC & AD

): de-scale internal parts and replace worn or damaged parts.

3. Mixing chamber: de-scale.

Maintenance for thermostatic mixers (Fig. AD):
If the SECURITHERM is not mixing correctly:

• Check that the hot and cold water pressures are balanced.
• Check the filters

and non-return valves

for signs of wear or for foreign bodies that may cause blockages.

• Remove and clean the thermostatic cell

Maintenance for electronic models (Fig. AA & AB):
1. Changing the SOLENOID VALVE (Fig. AA):

•  Shut off the hot and cold water supplies.
•  Unscrew the connection screws to remove the faulty solenoid valve.
•  Insert the new solenoid valve.
•  Connect the solenoid valve:
•  Reconnect the water supplies and check that the valve opens and closes.

2. Changing the BATTERY (Fig. AB):

• A red LED will flash when the battery needs changing:

- Unscrew the screw to change the battery, leaving the washer in place.
- Re-assemble, carefully tightening the screw.

CLEANING & MAINTENANCE

•

Cleaning chrome and stainless steel:

do not use abrasive, chlorine or acid-based cleaning products.

Clean with mild soapy water using a cloth or a sponge.

•

Frost protection:

drain the pipes and operate the mixer several times to drain any remaining water.

In the event of prolonged exposure to frost, we recommend taking the mechanisms apart and storing them indoors.