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2 Electrical connections

The Mikrofill Maxi requires a permanent 230V 50Hz 1 phase supply rated at 6 amp. The unit is internally fused at 5 amp

(see electrical installation diagram).

The Maxi also incorporates two BMS relays offering volt free contacts for the remote indication of high or low pressure

conditions within the heating/chiller system. These relays are also independently fused at 5 amp to protect the Mikrofill

Maxi from external electrical faults. A further volt free relay is included in the unit, this is to interlock the boiler or chiller

control circuits. Should either of the alarm relays operate then the relay will shut down the boiler or chiller, indication of

any alarmsituation will be indicated on the display. The relays are suitable for use on control voltages up to 250V.

Once the Mikrofill Maxi has been correctly connected the unit is ready for use. Ensure that the unit has an adequate water

supply and the service valves are open. Check for water leaks. Although every Maxi unit is factory tested it is still advisable

to vent the pump(s) before operation. This is achieved by slackening the brass plug (14mm A/F).situated on the pump

housing, until all air is eliminated. Switch on electrical supply to the unit and the on/off switch to the lower right hand

side of the unit and the unit will start to pressurise the system. When the systemhas achieved the set pressure, the unit 

will stop filling, and go to standby.

Important note, " pump type" pressurisation units are not designed to fill systems fromempty, they are only capable of " top

up" and pressurisation. The system should be filled by other means in compliance with the water regulations. The Mikrofill

Maxi is capable and approved to fill heating/chiller systems.

2.1 Electrical diagram

7

Electrical data

Supply: 230V 1ph 6 amp

Full load current: 2.5 amp

Start current: 4.5 amp

Fuse rating: 5 am p / 8 amp

BMS relays and boiler/chiller

relays: volt free contacts rated

at 250VAC at 5 amp

All relays are independently

fused at 5 amp

Low pressure alarm High pressure alarm

Boiler/chiller

common alarm

230 VAC 50Hz

Summary of Contents for Maxi Plus

Page 1: ...MAXI MAXI PLUS Floor mounted Pressure manager INSPIRED EFFICIENCY TECHNICAL DOCUMENTATION Issue 06 14...

Page 2: ...gh or low pressure alarms 9 5 5 Frequent use alarm 10 5 6 Frequent use reset 10 4 3 Hours run facility 8 4 4 Hours run reset 8 6 Fault diagnosis 11 7 Manual override 12 8 Audible alarm override 12 9 S...

Page 3: ...ght 15mm Compression 15mm Compression 3 4 BSP Max Coldfill Pressure Maxi 3 0 Bar Maxi HP 6 0 Bar 27 Kg Dimensions 390mm 465mm 600mm Height Width Depth 230 Volt 2 5 Amp 2 5 Amp 5 Amp 5 Amp Maxi Single...

Page 4: ...Maxi is intendedfor mounting the unit should be situated in such a position as to enable the liquid crystal display to be easily read 1 1 Mains boosted cold water supply The Maxi is designedto be conn...

Page 5: ...o 300L 3 4 22mm expansionpipework Vessel size upto 1000L 1 28mm expansionpipework For vessel sizes inexcess of 1000L capacityplease contact our technical sales department IMPORTANT NOTE The expansion...

Page 6: ...ve pumpposition Flow Return Overflow Mains cold water 320 390 465 540 480 600 View on arrow A Front view The expansion vessel is usually connected on the inlet side of the pump on the system return Fo...

Page 7: ...ervice valves are open Check for water leaks Although everyMaxi unit is factorytestedit is still advisable to vent the pump s before operation This is achieved by slackening the brass plug 14mm A F si...

Page 8: ...used to mute alarm conditions In normal mode the keypad buttons are for information only and do not affect any of the parameters preset in the service mode For information on service mode see section...

Page 9: ...a pumphas developeda fault This is achievedbymonitoringthe systempressure and if an increase in pressure is not sensed in a set period of time it will stop operation of that pump and the pump failure...

Page 10: ...or cooling system If in any 24 hr period the Maxi operates more than a preset limit i e 5 then a frequent use alarmwill show the operation of the systemwill not be affected this functionis for informa...

Page 11: ...or leaks then switch unit off and back on to reinstate Switch unit off and back on to reinstate if pump does not operate when required replace pump If pump operates dryrun settingmayneedto be increase...

Page 12: ...ndition or if there is insufficient pressure in the system 8 Audible alarm mute If the Mikrofill Maxi does indicate a fault an audible alarm will sound This can be muted by depressing the service mode...

Page 13: ...g Usage for information on water used in the system no setting required please note to zero the usage the buttons need to be pressed simultaneously for 3 seconds minutes the less responsive the flood...

Page 14: ...0 35 Flow l min Head bar Maxi Pump Maxi HP Pump PRODUCT DATA Pump Max Pressure bar Max Flow l min Input Power W Current A Supply Voltage Frequency Size mm L x W x H Weight kg Maxi Pump 3 65 29 510 2 5...

Page 15: ......

Page 16: ...Mikrofill Systems Ltd West Court Merse Road Redditch B98 9HL T 44 0 8452 606020 F 44 0 8452 606021 W mikrofill com E info mikrofill com...

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