11
Megalife Product Guide
6: Installation - Commissioning
6.1 Filling The Megalife Solar With Water
• Ensure that all fittings and immersion heater(s) are correctly fitted and tightened.
• Open the highest hot tap in the system.
• Open the mains cold water supply to the cold water feed cistern.
• Open the service valve or stop valve fitted in the cold feed pipe to the unit. Allow the unit to fill. When water
flows from the hot tap allow to run for a few minutes to flush through any dirt or swarf, then close tap.
• Allow cold water feed cistern to fill to the water line. Adjust the float valve if necessary.
• Open successive hot taps to purge any air from the system.
• Check all connections for leaks and rectify as necessary.
DO NOT SWITCH ON ANY OF THE HEAT SOURCES UNTIL THE UNIT HAS BEEN FULLY FILLED WITH WATER.
6.2 Solar Primary Circuit
Fill the solar primary circuit following the instructions provided with the solar hydraulic controls. The cylinder
temperature control sensor probe supplied with the solar differential temperature controller must be inserted into
the pocket in the lower controls housing and its cable securely clamped.
Heating by the solar primary circuit is controlled by the solar differential temperature controller, refer to the
manufacturers installation instructions for details of how to set up and commission the solar primary circuit. The solar
controller should be programmed to give a maximum storage temperature in the Megalife solar of 70
o
C although
60
o
C is recommended to minimise scaling.
6.3 Auxillary Heating Coil Units
Fill the auxillary primary (indirect) circuit following the boiler manufacturer’s commissioning instructions. To ensure
the primary heating coil in the Megalife solar is filled any motorised valve fitted to control the primary flow to the
Megalife solar auxillary primary heating coil should be manually opened by moving the lever on the motor housing
to the MAN OPEN setting. When the primary circuit is full return the lever to the AUTO position. Vent any air by
opening the air bleed.
When the system is full switch on the boiler, ensure the programmer is set to Domestic Hot Water. Allow the Megalife
solar unit to heat up and check that the indirect thermostat and any motorised valve connected operate correctly.
A storage temperature of approx. 60
o
C is recommended.
36005941_issue_07.indd 11
07/09/2017 08:40:36
