Technical data

26
STRATA1
OS
AAV
LSV
SV
C
AAV
PRO 1
IV
IV
CWM
DOC
DOC
DOC
DOC
Strainer
Heating Pump
Low Velocity Mixing Header Max Velocity 0.5m/s
Expansion
Vessel
Filling
Point
Strata 1
Boiler
Condense
Waste
Heating Load
PS
IV IV
17.0 hydraulic system design
OS= Outside air temperature sensor, used where
direct-on-boiler weather compensated flow
temperatures are required.
C= Room temperature controls e.g. RE2132
modulating room unit from MHS Boilers, or,
separate time clock & room thermostat.
PRO1=Pump regulation module from MHS Boilers.
Allows heating pump to be driven from
boiler, providing for auto operation, frost
protection running & summer standstill
exercising.
Must be used where RE2132 modulating
room unit is installed.
Max pump motor load 2A
PS= Low water pressure cut off switch
Typical Single Strata 1 boiler installation serving heating only and
using a low velocity mixing header where system index resistance
exceeds in-built boiler pump residual head - see page 23. Flow
temperature may be fixed/constant or weather variable.
System Type 3