andrews COMBIflo 100/300, Installation, Operation And Maintenance Manual

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ANDREWS COMBIfl o 43 GB
Please preform the following actions to ensure that as little air as possible remains inside the primary water
circuit:
1. Ensure that the supplied auto air-vent has been fi tted to the top of the main LLH and the auto air-
vent fi tted to the fl ow LLH is in place and the caps of both vents have been loosened (approx one
turn anticlockwise).
Main LLH auto air-vent
Flow LLH auto air vent
2. Connect a water supply to the fi ll/drain point of the appliance (see previous page for illustration) and
fi ll with water, until the auto air vents stop venting. Do not exceed 4 bar as this will open the auto-
matic pressure relief valve.
3. With the gas supply to the appliance turned off , Use the Graphical User Interface (GUI) to turn
DHW on (see below)
DHW operation mode
on
70 O C
DHW page DHW tank set point
4. Allow the appliance to cycle through fi ve attempts per heat engine. This will operate all internal
pumps, until all heat engines are locked out. Pressing the reset button for a second will start the
ignition sequence process again.
5. Repeat until all air has been removed and the appliance pumps are running quietly. Confi rm that
the circulation pump of each heat engine is operating correctly by checking that a solid green LED
is illuminated on the front of each heat engine pump and “C3” is displayed on the primary DHW
pump. Do not proceed if the LED lamp is fl ashing green or red/green (see 6.4, items 24 & 25 for
location details).
6. Turn DHW off (see illustration above) and allow the pumps to overrun and turn off
7. Recommended fi ll pressures: Min 0.7 bar, Max 3.5 bar.
8. Check for water leaks inside and outside of the appliance and retighten joints as necessary.
9. Top up inhibitor levels as necessary (see 4.4 for details)
10. At the end of this fi lling and bleeding process press the reset button for one second before moving
onto the next phase of commissioning.
CAUTION
It is ESSENTIAL that all air is removed from the heater before proceeding with commissioning the
heat engines , otherwise permanent damage may occur to the heat exchangers and this damage is
not covered by warrantee.