Delta Performance F25 Installation, Operating & Servicing Instructions page 4

2 INSTALLATION
2.2.2.2 ES hydraulic kit
ES offers an optional pre-assembled hydraulic kit comprising:
- A circulator.
- A motorised 3-way manual valve.
- Connecting pipes including an optional second circuit.
- Two isolation valves.
- Connectors for mounting the safety valve with pressure gauge
and the filling valve to the right or left of the expansion tank.
2.2.2.3 Discharge
The drain cock and safety valve must be connected to the waste
water system in accordance with current regulations.
2.2.3 DOMESTIC HOT WATER CONNECTION
2.2.3.1 Pressure reducer
If the water mains pressure is greater than 6 bar, a pressure
reducer calibrated to 4.5 bar must be fitted.
2.2.3.2 Safety unit
The tank safety unit must be ES approved and calibrated to 7
bar. The valve discharge must be connected to the waste water
system in accordance with current regulations.
2.2.3.3 Domestic hot water expansion tank
Installing a hot water expansion tank avoids any risk of pressure
surges due to waterhammer.
2.2.3.4 Hot water circulation
If the tank is located a long way from the point of use, then
installing a closed recirculation circuit ensures that a faster supply
of hot water is always available.
2.2.3.5 Description
1. Safety unit
2. Pressure reducer
3. Thermostatic mixing valve
4. Hot water circulator
5. Non-return valve
6. Domestic hot water type expansion tank
7. Inlet valve
8. Draw-off valve
9. Bleed valve
IMPORTANT
As a safety measure against burns, we strongly advise
installing a thermostatic mixing valve (recommended
temperature: 60° C).
This is available as an optional accessory
Safty unit
Pressure reducer
Thermostatic mixing valve
Expansion tank
4
Ø 3/4"
Ø 3/4"
Ø 3/4"
5 litres
Fig. 4: Assembly with the ES hydraulic kit
2
1
7
9
6
Fig. 5a: Connection without thermostatic mixing valve
2
1
7
9
6
Fig. 5b: Connection with thermostatic mixing valve
5 4
8
5 4
8
3