Page 152 - Water_Controls_for_Public-Commercial

/ Group thermostatic mixing valves PREMIX SECURITY

Circulating loop with PREMIX SECURITY and points-of-use WITH maximum temperature limiter

PREMIX SECURITY enables the hot water circulating loop to be maintained at a constant temperature ≥ 50°C (recommended at 55°C),
which reduces heat loss, and prolongs the life of the system.
• Points-of-use supplied at 50°C or more equate to an increased risk of scalding.
• The HSE guidance HSG 274 Part 2 (2014) restricts the maximum temperature at the hot water outlet to < 41°C.
To guarantee safety, all DELABIE is mixers (thermostatic, electronic or time flow) which are used at the point-of-use are fitted with a maximum temperature
limiter, which can be adjusted by the installer.

Technical area Sanitary block

Mixers with maximum temperature limiter or individual
≥ 55°C thermostatic mixing valve.

≥ 55°C
≥ 60°C
T ≤ 15°C
Safety at the points-of-use:
PREMIX
SECURITY ! anti-scalding safety
or maximum temperature limiter.

Production ≥ 55°C
HW ≥ 60°C !
~80% HSE guidance:
maximum 2 metres
of pipework between
T the TMV and the outlet.
≥ 50°C ~20%

WC: all equipment causing variations in pressure Mixer with maximum temperature limiter
should be supplied upstream of the circulating loop. or individual thermostatic mixing valve.

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).

150 Thermostatic mixing valves