Solar 3C 3C382B, Installation, User And Service Manual

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9. Filling and commissioning
9.1. Check that the expansion vessel charge pressure is 3 bar.
9.2. Check that all connections are made tight including the immersion heater.
9.3. Open the main stopcock and fill the secondary system first. Open successive taps (hot and cold)
starting with the tap furthest from the cylinder. Leave each tap open for a few moments to
allow all air and possibly debris from the system to exit. Manually lift (by rotating the knob)
both the expansion relief (EV) and the temperature and pressure relief valve (TPV) for a short
period to remove trapped air from behind the valve seating and to prove the correct function of the
discharge arrangement.
9.4. Check all joints for leaks and rectify as necessary.
9.5. Check that the control and high limit settings for the indirect system and the immersion heater are
as required.
9.6. Fill the primary side, (note: it will be necessary to manually open the 2 port valve whilst filling the
system, this is achieved by moving the lever on the valve head sideways). Check for leaks and rectify
as necessary. Vent all heat emitters of air and following the manufacturers lighting instructions ignite
the boiler.
9.7. Check that while the cylinder is heating up, no water leaks from either the expansion relief or the
temperature and pressure relief valve and when the cylinder reaches temperature, that the 2 port
valve closes. 18
Fig 8. Immersion Heater Wiring
WARNING: THIS APPLIANCE MUST BE EARTHED