SAHP - Installation Manual
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V3 June 2021US - SD667052
SECTION 4
PLUMBING
INSTALLATION continued
4.17
The boiler coil has a maximum working pressure of 50psi.
With pressurized boiler circuits an additional expansion vessel
needs to be sized to suite the circuit volume and installed along
ÜÌ >Ã>viÌÞÀiivÛ>Ûi>`w}«°
4.18
The boiler coil connection must be complete with thermostatic
temperature controls. Uncontrollable heat sources such as wood
burning store are not suitable. The included two port motorised zone
Û>Ûià Õ`LiÃÌ>i`ÌÌ i«À>ÀÞyÜLivÀiÌ iVÞ`iÀ°
4.19
/ i`ÃV >À}i««iÜÀvÌ i-Ƃ*ÕÌÕÃÌLiwÌÌi`ÌV«ÞÜÌ
the latest version of relevant local and national standards.
4.20
ivÀiw}«i>ÃiiÃÕÀiÌ i«ÀiÃÃÕÀiÌ iiÝ«>ÃÛiÃÃiÃ
43.5psi. This is the same as the setting of the pressure reducing
valve. The valve is a Schrader type.
If the pressure reducing valve
setting is amended, the expansion tank pressure must be
amended to match the same settings.
4.21
1«V«iÌÌ iÜ iÃÌ>>ÌÕÃÌLiÌ ÀÕ} ÞyÕÃ i`Ì
ÀiÛi>ÃÌ>>Ì`ÀÌ]yÕÝiÃ>`>Õv>VÌÕÀ}ÃLivÀi
Li}«ÕÌÌ«iÀ>Ì°/yÕÃ Ì iÃÞÃÌiwÀÃÌwÌ iÃÞÃÌi°
Close the cold water supply full bore isolating valve. Completly drain the
tank (outlets may need to be opened during this process.) Open the
V`Ü>ÌiÀÃÕ««ÞvÕLÀiÃ>Ì}Û>Ûi°,iwÌ iÌ>ÜÌ Ü>ÌiÀ>`
repeat until water runs clean from the cylinder.