Additional Hydraulic Necessary Elements For Dhw; (Only For Uk Market) - Hitachi YUTAKI S COMBI Series Installation And Operation Manual

5.4.4.4 Additional hydraulic necessary elements for DHW (only for UK market)
Nature
Piping connections
Accessories
Field supplied
The following accessories are necessary for the compliance of the YUTAKI S Combi for UK market
with the UK requirements referred in the UK Building Regulations 2000.
• 1 temperature and pressure relief valve (factory supplied), fitted at the hottest part of the DHW
tank. This device protects the unit of excessive temperature (>96°C) and excessive pressure
(>7 bar) in the DHW tank. Additionally, a Ø15 diameter pipe (factory supplied)is fitted to the outlet
of the relief valve and drives the discharge to the tundish (4).
• 1 Tundish (4)(field supplied), installed in a vertical position, with no more than 600 mm of pipe
between the valve outlet and the tundish.
• 1 Tundish outlet pipe (2)(field supplied) with a vetical section at least 300 mm long below the
tundish(4), before any elbows or bends in the pipework. This pipe should be made of metal or
other material that has been demonstrated to be capable of safety withstanding temperatures
and pressure of the water discharged, as it is refferred in the UK Building Regulations.
• The discharge pipe from the tundish (2) must terminate in a safe place where is no risk to
persons in the vicinity of the discharge. The discharge will consist of high water temperature
and pressure.
PMEN0645 rev.0 - 04/2023
DHW TANK
No.
T&P relief valve outlet pipe Ø15
1
(factory supplied)
2 Tundish outlet pipe (Field supplied)
Pressure and Temperature relief valve
3
(Factory supplied)
4 Tundish (Field supplied)
5 Drain (Field supplied)
Part name
5
32