MHS Boilers Strata 2 - Connection Diagrams; Wiring for Pressure Switches (Single Boiler); Wiring for Pressure Switches (Multiple Boilers)

21
STRATA2
suggested wiring arrangement for high/low
pressure switches and Strata 2 boilers
Strata 2/120 Boiler
Low Pressure
Switch
Break on
Pressure Fall
Break on
Pressure Rise
High Pressure
Switch
Supply
Remote Safety
Interlocks
240 Volts out from centre
tapping return to either
side for complete boiler
operation interlock
required for each boiler
Contactor
N
suggested wiring arrangement for high/low
pressure switches and multiple Strata 2 boilers
Strata 2/120 BoilerStrata 2/120 Boiler
Low Pressure
Switch
Break on
Pressure Fall
Break on
Pressure Rise
High Pressure
Switch
Supply
Remote Safety
Interlocks
Remote Safety
Interlocks
240 Volts out from
centre tapping
return to either
side for complete
boiler operation
interlock required
for each boiler
Contactor
N
5.7.3 connection diagrams
Fig 5.7c
Fig 5.7.d