30
STRATA1
OS
C
AAV
S
IV
SV
SV
SV
AAV's
AAV's
AAV's
IV
IV
IV
IV
IV
IV
NRV
NRV
NRV
DOC
DOC
DOC
RS
FS
IV
IV
LSV
DOC
DOC
DOC
Heating Pump
2A. Max
HWS Primary
Pump
2A. Max
Hot Water
Calorifier or
Indirect Cylinder
Low Velocity
Mixing Header
Max Velocity 0.5m/s
Expansion
Vessel
Filling
Point
CWM
Strainer
Strainer
Condense
Waste
Strata 1
Boiler
Strata 1
Boiler
Strata 1
Boiler
KKM 2
Heating Load
IV
IV
IV
IV
PS
1*
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.
FS=
Flow temperature sensor
RS=
Return temperature sensor
S=
Hot water temperature sensor or
thermostat
KKM2=Modulating Kaskade Manager. Up to 9Nr
boilers may be controlled using 2Nr linked
KKm2's.
PS=
Low water pressure cut off switch
*1=
Filling Point. In accordance with BS 6644,
automatic pressurisation unit must be
installed when the boilers input is greater
than 60kW.
See item 17.1
Typical Multiple Strata 1 installation. Boilers controlled by modulating Kaskade manager which also has
the facility to control heating & domestic hot water production. Heating flow temperature may be
fixed/constant or weather variable. Hot water has priority.
System Type 6
