MHS Boilers STRATA 3 220, Instructions For Installation, Servicing & Operation

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21
STRATA3
5.8.2 mixer module MR 03
Mounting
●
Remove the 4 screws on the front of the pump
control.
●
Remove the cover.
●
Mount the unit in the space provided inside the
boiler casing.
●
Refer to the instructions supplied with the unit.
140
60
115
Technical Information
●
Supply Voltage – 230V 50Hz (mains from Strata
3 appliance)
●
Maximum contact load (pump 2) – 1.0A
●
Maximum contact rating (pump 2) – 120W
●
Maximum contact load (pump 3) – 1.0A
●
Maximum contact rating (pump 3) – 120W
●
Supply temperature sensor S7: Type KTY 81-
210 (PTC)
NOTE:
Ancillary relays required if pump duties are
greater than detailed above.
The mixer module MR 03 is used if a standard heating circuit (eg for normal temperatures for radiators)
and a mixed heating circuit (eg for under floor heating 55/45°C) with different flow temperatures are
connected to the Strata 3. The mixer module MR 03 is intended for mounting inside the boiler casing, and
contains a potentiometer for setting the heating compensation slope for the underfloor circuit.
Fig 5.8b
Fig 5.8c
Fig 5.8d
MRO3
Control
Module
MRO3
Control
Module
NOTE: The DIP switch of the Strata 3 must be
adjusted so that only one direct heating circuit is
controlled (DIP 1 = ON).
If the power consumption of pump 2 is more
than 120W, an auxiliary relay is to be installed.