Delabie PREMIX Confort Installationsanleitung Seite 5

TECHNICAL CHARACTERISTICS (Fig. A and B)
• Factory pre-set: 38°C.
• Temperature Setting: 30°C to 42°C with balanced hot and cold water pressure at 3 bar.
• The mixed water maximum temperature setting can be over-ridden to achieve maximum temperature for thermal shocks.
• Maximum hot water supply temperature: 85°C.
• Max/min pressure: 1 to 10 bar (recommended pressure 1 to 5 bar).
• Recommended pressure differential between hot and cold inlet: max.1 bar (recommended 0.5 bar). If there is a large difference i.e. >0.5 bar
between the cold and hot water pressure, pressure regulators should be installed at the hot and cold water inlets.
• Anti Scald Safety: hot water cut-off in the case of loss of cold water.
The thermal security is active if the temperature difference between the hot water and the mixed water is more than 20°C and the maximum
temperature is set at 42°C. Response time is approx. 3 seconds.
• Minimum flow-rate is 8 lpm. If only one shower is required, we recommend installing an individual thermostatic mixing valve to regulate the
temperature.
• Mixed water outlet at the top, hot water inlet on the left and cold water on the right. (Red ring is hot and blue ring is cold).
• To have the mixed water outlet at the bottom: swap the blanking plug to the top and the mixed water outlet to the bottom.
• Valve Body in DZR brass.
INSTALLATION (Fig. C and D)
Installation must comply with local water bylaws and relevant legislation, and observe the normal operating conditions (cf our brochure).
- Ensure that pipe diameters and length of supply pipes, the selected group mixing valve and circulating loop pump are appropriate for the
installed outlets.
- Ensure that non-return valves, regulating valves and isolating valves are installed in the correct positions.
- All pipes must be thoroughly flushed out prior to commissioning.
Before Installation - check the installation instructions and ensure that hot water supply
is always delivered from the left side and cold from the right.
Isolating valves, filters and test points must be installed upstream from the PREMIX inlets (see our angled isolating valves in our brochure).
The installation of a group thermostatic mixing valve should be carried out by qualified professionals.
1. THE BATTLE AGAINST LEGIONELLA:
We recommend dividing the installation into several branches and fitting a group thermostatic mixing valve for each branch. Installing PREMIX
valves as close as possible to the point of use, supplied by water at more than 50°C, is the best method of combating Legionella, improving user
comfort and making maintenance easier.
2. INSTALLATION IN CIRCULATING LOOP:
A circulating loop enables mixed water to be delivered at the point of use. The two diagrams opposite illustrate the two types of circulating loop.
• A simple circulating loop with mixed water
• Double circulating loop with hot and mixed water circulated separately (recommended if the hot water production is a long way from the
mixing valve).
• About 80% of the circulated water should return through the mixing valve and about 20% to the production of hot water.
• Does not comply with this rule 80/20 leads to the deterioration of the thermostatic element.
TWO PREMIX VALVES IN PARALLEL (Fig. F)
Large installations where the flow-rates can be variable due to local demands, will be beyond the capabilities of a large mixing valve. This is true
regardless of the brand. Joining together a medium sized mixing valve (3/4" or 1") with a large mixing valve (1 ¼" or 1 ½") will deliver mixed
water to many points of use simultaneously.
A pressure reducer must be installed between the two PREMIX valves: the water pressure must be 0.5 bar lower than the pressure at the mixing
valve inlets.
• With an average flow-rate, there is minimal pressure loss: the pressure-reducer prevents the second mixing valve from operating. Only the first
mixing valve operates: matching the required flow-rate.
• Once the flow-rate increases at the point-of-use, the pressure drop increases. The pressure-reducer enables the two mixing valves to operate,
enabling the increased a higher flow-rate at a constant level.
CALIBRATION (Fig. E)
The PREMIX is tested at the factory and calibrated to 38°C (hot and cold water pressure = 3 bar).
Once the installation is complete and the pipes have been flushed thoroughly, the mixing valve must be re-calibrated.
• Establish a flow-rate of approx. 25% of the maximum flow-rate. Measure the temperature of the mixed water at one of the points-of-use.
• To adjust the water temperature unscrew the locking screw and remove the control knob. Turn the valve spindle to the right to lower the
temperature and to the left to increase it (30° of rotation corresponds to 1°C of temperature)
• Replace the cross piece with 38° in line with the marker on the body. The mixing valve can be set between 32°C and 42°C.
• In the event of a sudden loss of cold water supply, re-calibrate the mixing valve.
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