32
PMEN0645 rev.0 - 04/2023
5
SPACE HEATING AND DHW
REFRIGERANT PIPING
5.4.4.4 Addional hydraulic necessary elements for DHW (only for UK market)
DHW TANK
Nature No. Part name
Piping connecons
1
T&P relief valve outlet pipe Ø15
(factory supplied)
2 Tundish outlet pipe (Field supplied)
Accessories 3
Pressure and Temperature relief valve
(Factory supplied)
Field supplied
4 Tundish (Field supplied)
5 Drain (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 Regulaons 2000.
• 1 temperature and pressure relief valve (factory supplied), ed at the hoest part of the DHW
tank. This device protects the unit of excessive temperature (>96°C) and excessive pressure
(>7 bar) in the DHW tank. Addionally, a Ø15 diameter pipe (factory supplied)is ed to the outlet
of the relief valve and drives the discharge to the tundish (4).
• 1 Tundish (4)(eld supplied), installed in a vercal posion, with no more than 600 mm of pipe
between the valve outlet and the tundish.
• 1 Tundish outlet pipe (2)(eld supplied) with a vecal secon 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 reerred in the UK Building Regulaons.
• 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.
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