Before attempting to FILL THE SYSTEM, please ensure that the procedure in Section 11.0 has been fully completed.
The Microprocessor of the Minifill (Electronic) has a FILL function, which utilizes the internal pumps to introduce water into the
Heating / Chilled Water System. This function negates the need for a separate filling method such as a Fill Loop, Fluid
Category 3 (C-3) In-House; or a Reduced Pressure Zone (RPZ) Valve, Fluid Category 4 (C-4) Other Than In-House.
The FILL function will introduce water into the Heating / Chilled water system for up to 6 hours, or until the Cold Fill Pressure
of 1.8bar (Factory Default Setting) has been achieved.
To Fill the Heating / Chilled water System, the following procedure shall be followed;
1) Ensure that the Cold Water Supply has been cleaned of any air or installation debris. Turn ON the Mains Cold
Water Supply to the appliance. Remove any debris from the Water Tank, and check the Ball Float Valve for correct
operation.
2) Open the Quarter Turn Isolation Valve on the underside of the BreakTank.
3) Vent The Pump. Located on the top of the center pipe connection of the pump assembly, is a vent valve. Undo
this vent valve with a vent Key and release any air. When all the air has been released, securely close the vent
valve.
4) Ensure that all drain valves, bleed points, etc, on the Heating / Chilled Water System are FULLY CLOSED, andthat
there are not any open ended pipes.
5) Open the Quarter Turn Isolation Valve on the Water Outlet (on the end of the flexiblepipe).
6) To activate the FILL function, the MAINTENANCE MENU of the Microprocessor must be accessed, this can be
done by Pressing & Holding the UP program button, and turning ON the POWER SUPPLY to theunit.
After a few seconds the LCD will display AUTO / Fault Code.
Using the DOWN program button, scroll through the settings until the word FILL appear on the LCD display. Press
the ENTER button to activate the FILL function. (The unit may operate upon power application if the sensed
pressure is below the set point of the unit. The FILL function should be used to prevent incorrect alarm activation.)
7) The PUMP will now operate and introduce water into the Heating / Chilled Water System.
8) Check the operation of the Ball Float Valve, and that the Main Cold Water Supply is suitably replenishing the water
into the Water Tank.
If the Mains Cold Water Supply cannot replenish the water sufficiently, then the LOW WATER SWITCH fitted to the
Water Tank will fall to OPEN, and the PUMP will turnOFF.
When the water level has risen the LOW WATER SWITCH will rise to CLOSE, and the PUMP will turn ON again.
9) The PUMP will introduce water into the system until the COLD FILL PRESSURE of 1.8bar (Factory Setting) is
achieved, 6 HOURS has been exceeded, or the LOW WATER SWITCH on the Water Tank falls toOPEN.
10) To terminate the Fill function press ANY BUTTON, and turn OFF the POWER Supply until the unit has been fully
commissioned, as detailed in Section 14.0
PLEASE NOTE:
Great Care should be observed when using the FILL function to ensure that all water joints
etc are sound and leek-free. MHS Boilers cannot be held responsible for any damage that
may result from water leaks. To terminate the FILL function turn OFF the POWERSupply.
