Commissioning - Heatrae Sadia Megalife 100E Installation Manual

6: Installation - Commissioning
6.1 Filling The Unit 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 Direct Units
When the system is full switch on the electrical supply to the immersion heater(s) and allow the unit to heat up. Check
that the thermostat operates correctly. A preset storage temperature of approx. 60
temperature can be adjusted by inserting a flat bladed screwdriver in the adjustment knob and rotating. The minimum
thermostat setting is 10°C. Adjustment represents a temperature range of 10°C to 72°C (see Fig. 04, page 9).
6.3 Indirect Units
Fill the primary circuit following the boiler manufacturer's commissioning instructions. To ensure the primary heating
coil in the Megalife is filled any motorised valve fitted to control the primary flow to the Megalife 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
unit to heat up and check that the indirect thermostat and any motorised valve connected operate correctly. A preset
storage temperature of approx. 60
a flat bladed screwdriver in the adjustment spindle on the immersion heater thermostat and rotating. Adjustment
represents a temperature range of 10°C to 72°C (see Fig. 04, page 9).
6.4 Benchmark Commissioning Certificate
On completion of installation and commissioning the Benchmark "Vented Cylinder Commissioning Certificate" should
be completed and signed off by the competent installer or commissioning engineer in the relevant sections.
Fig: 07. Secondary Circulation Connection
C is recommended. If necessary the temperature can be adjusted by inserting
o
C is recommended. If necessary the
o
11