Santon Aquaheat AH30V, Инструкция по установке и эксплуатации

Страница: 15 / 20

15
6 .8 The Temperature/Pressure Relief Valve and the Pressure (expansion) Relief
Valve should be regularly checked. To check the valves:
6.9 Manually operate the valves by either twisting the cap or lifting the lever.
Ensure water flows freely from the valve(s) and through the discharge pipes
(NOTE: the water discharged may be very hot). Ensure the valve(s) reseat
correctly when released.
6.10 Clean the strainer incorporated in the Pressure Reducing Valve. To inspect
and clean the strainer turn off the mains water supply to the heater and open
a hot tap to relieve the system pressure. Unscrew the black cap from the
Pressure Reducing Valve and remove. The strainer will be removed with
the cap. Wash any particulate matter from the strainer under clean running
water. Replace the cap assembly ensuring the sealing ring is correctly fitted.
Do not use any other type of sealant. Close hot tap, open mains stop cock
and check for leaks.
The Expansion Vessel should have a precharge pressure of 0.35 MPa
(3.5 bar). This can reduce over time and eventually require re-charging.
To do this:
6.11 Turn off water supply to the unit; open a hot tap to relieve system pressure.
6.12 Remove dust cap from top of Expansion Vessel.
6.13 Check pre-charge pressure using a tyre pressure gauge. If the pressure is
lower than 0.35 MPa (3.5 bar) it should be recharged using a tyre pump
(Schraeder Valve type). DO NOT OVER CHARGE.
6.14 Re-check pressure and when correct replace dust cap.
6.1.5 Turn on mains water supply and close hot tap.