Page 154 - Water_Controls_for_Public-Commercial

/ Group thermostatic mixing valves PREMIX COMFORT

Circulating loop PREMIX COMFORT and points-of-use WITHOUT maximum temperature limiter

PREMIX COMFORT reduces the risk of scalding by limiting the temperature at the points-of-use: mixed water supply < 41°C.
• The points-of-use do not have a temperature limiter.
• The HSE advises that long pipe runs between TMVs and outlets should be avoided and should not exceed 2 metres in length.

Technical area Sanitary block
Mixers supplied with mixed water and cold water
maximum temperature limiters removed
≥ 50°C

!
40°C HSE guidance:
> 60°C maximum 2 metres
of pipework
between the TMV
T and the outlet.
Boiler HW ≤ 20°C
> 60°C ≥ 50°C
PREMIX COMFORT
Raising
the temperature 38°C
1-2 / 24hr
T
≥ 50°C

~80 %
WC: all equipment causing variations in pressure
will be supplied upstream
of the circulating loop. ~20 % SPORTING 2 shower panels
supplied with mixed water

GUIDANCE FOR A QUICK SELECTION OF PREMIX WITH DELABIE WATER CONTROLS

High simultaneous use Normal simultaneous use
Flow rate at 3 bar Recommended Number of taps Simultaneity Number of taps Simultaneity
PREMIX
pressure loss operating range and valves coefficient and valves coefficient
¾" 55 lpm 10 - 45 Up to 6 1 Up to 6 1
1" 90 lpm 20 - 70 Up to 12 1 Up to 16 0.3
1¼" 140 lpm 30 - 110 Up to 25 0.5 - 0.7 Up to 50 0.15
1½" 190 lpm 40 - 150 Up to 40 0.4 - 0.6 Up to 100 0.1

High simultaneous use: sports stadia, swimming pools, schools, boarding schools, campsites, etc.
(DELABIE basin taps 3 lpm; DELABIE showers 6 lpm; average use 5 lpm).
Normal simultaneous use: hospitals, hotels, offices, apartment blocks, social housing, etc.
(DELABIE basin taps 3 lpm; DELABIE showers 6 lpm; sinks 12 lpm; baths 20 lpm; average use 12 lpm).

152 Thermostatic mixing valves