MEGAFLO Commercial 1000, Руководство по эксплуатации продукта

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Unvented Hot Water Cylinder
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MAINTENANCE AND
SER
VICING (3)
Maintenance & Servicing
Maintenance requirements
To ensure the continued optimum performance of the Megaflo Commercial it should be regularly
maintained. This is of particular importance in hard water areas or where the water supply contains
particulate matter. Maintenance should be carried out by a competent person and any replacement
parts used should be authorised Megaflo
Commercial spare parts. It is recommended that
maintenance is carried out every 12 months and includes the checks detailed below.
In hard water areas consideration should be given to periodically descaling the immersion heater elements.
To do this the Megaflo
Commercial unit will need to be drained.
Check operation of Safety Valves
Slowly open the Temperature and Pressure Relief Valve by twisting its cap for a few seconds. Check water
is discharged and that it flows freely through the tundish and discharge pipe work. Check valve reseats
correctly when released.
NOTE: The water discharged may be very hot.
Repeat the procedure for the Pressure Relief Valve.
Inspection
The immersion heater boss can be used as an access for inspecting the cylinder internally.
Clean the strainer
The strainer is incorporated within the Pressure Reducing Valve housing of the Valve. To inspect and clean
the strainer:
1. Turn off the isolating valve prior to the Pressure Reducing Valve or the main stop cock to the
system.
2. Open the lowest hot tap in the system to relieve the system pressure.
3. Using a spanner unscrew the pressure reducing cartridge and remove the moulded housing. The
strainer will be removed with the cartridge.
4. Wash any particulate matter from the strainer under clean running water.
5. Replace the strainer and screw the Pressure Reducing Valve cartridge into the moulded housing.
6. Close hot tap, turn on isolating valve or main stop cock to the system. Check for leaks.
Draining the Megaflo Commercial unit
Switch off the electrical supply to the immersion heater(s) and shut down the boiler. Turn off the mains
water supply to the Megaflo
Commercial unit. Attach a hosepipe to the drain valve having sufficient
length to take water to a suitable discharge point below the level of the unit, at least one metre below
the unit is recommended. Open hot water tap nearest to the Megaflo
Commercial to relieve the system
pressure. Open drain valve. If water fails to drain from the Megaflo Commercial vent the unit by manually
opening the Temperature / Pressure Relief Valve.
Refilling system
DO NOT switch on the immersion heater(s) or boiler until the system has been completely refilled.
Close the drain valve. With the hot tap open, turn on mains water supply. When water flows from the hot
tap allow to flow for a short while to purge air and to flush through any disturbed particles. Close hot tap
and then open successive hot taps in system to purge any air. The electrical supply can now be switched
on.