66
Tzew - outdoor temperature sensor
Tpok - room temperature sensor
ZP - straight-through valve
ZT - thermostatic valve
ZO - air-vent valve
ZRC - differential pressure relief valve
NW - expansion vessel
RW - expansion pipe
F - magnetic filter
ZK - cut-off valve
Tzew - outdoor temperature sensor
Tpok - room temperature sensor
NW - expansion vessel
RW - expansion pipe
F - magnetic filter
ZK - cut-off valve
2
b)
a)
Fig.2
Exemplary scheme of central heating system
a) - radiators system (one heating circuit)
b) - under-floor heating system (one heating circuit)
Instruction for the installer
Pc.w.u - circulation pump
F - magnetic filter
NW c.o. - CH expansion vessel
NW c.u.w.- DHW expansion vessel
RW - expansion pipe
ZB - safety valve
ZK - cut-off valve
ZO - air-vent valve
ZP - straight-through valve
ZT - thermostatic valve
3
Fig.3
Exemplary scheme of central heating system– radiators, under-floor heating, DHW cylinder, DHW circuit
ZZ - non-return valve
c.w.u. - domestic hot water (DHW)
PO - circulation pump
Tco2 - sensor of the medium temperature in the second circuit
TPO - circulation pump thermostat
Tpok - room temperature sensor
Tzas - thermostat or cylinder temperature sensor
Tzew - outdoor temperature sensor
ZAS - DHW cylinder with a heating coil
ZTD - three-way valve
ZM - three-point mixing valve
Z.W. - cold water