2 Electrical connections
The Mikroll 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 oering 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 Mikroll
Maxi from external electrical faults. A further volt free rel
ay 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 Mikroll 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 wat
er 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
ho
using, until all air is eliminated. Switch on electrical supply to the unit and the on/o switch to the lower right hand
side of the unit and the unit will start to pressurise the system. When the system has achieved the set pressure, the unit
will stop lling, and go to standby.
Important note, " pump type" pressurisation units are not designed to ll systems fromempty, they are only capable of " top
up" and pressurisation. The system should be lled by other means in compliance with the water regulations. The Mikroll
Maxi is capable and approved to ll 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
To Next Page
Loading...