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

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STRATA3
6.6.3 Engineers button
This button is reserved for the Service Engineer.
Note: Pressing this button once instructs the Strata 3 to operate at half load. The status indicator shows
(EMISSIONS). If the 'Engineers' button is not pressed again within 10 minutes, the Strata 3 switches back
into automatic operation.
After further pressing during the (EMISSIONS) display, (10 MIN LOW) appears on the status indicator.
In this position, the loading can be adjusted, with the green potentiometer, between 42kW and 210kW
(Strata 3 220) or 63kW and 316kW (Strata 3 330).
By pressing the 'Engineers' button during the display of (10 MIN LOW), the Strata 3 switches back into
automatic operation. After 10 minutes of ’10 min low’ operation, the Strata 3 also automatically returns
itself into automatic operation.
6.6.4 STB test button
This ‘test’ button is provided in order to be able to simulate the function of overheating of the heating
water. By pressing the ‘test’ button, the display (LIMIT) appears. During this display, the function of the
Strata 3 is shut down. The boiler commences operation when the button is released. If the ‘test’ button
is pressed for longer than 3 minutes, the ‘flashing’ (STB-WATER 1) alarm appears. The function of the
Strata 3 is then locked out.
The Strata 3 can also be locked out more quickly. For this purpose press the 'test' and the 'Engineers'
button simultaneously. To restart the boiler following a lockout condition, press the ‘reset’ button, the
Strata 3 returns to automatic operation.
7.0 boiler operation adjustment
(setting of dip switches)
1 2 3 4 5 6 7 8
ON
OFF
Fig 7.1a
7.1 adapting the control to the heating system
To access the DIP switches, the control panel may need to be removed: (early versions)
●
Remove the four screws on the control face.
●
Carefully remove the control panel away from the face.
●
Do not allow the panel assembly to drop – the panel can be temporarily ‘hung’ over the casing cross
member. See fig 7.1b.
DIP Switches
Service Button