15
RB
H
PI
CHT
RO
RW
RP
RP
ZZ
ZTM-t
KS
Pco
F
ZZ
Pcwu
F
ZZ
RB/RW
TP
CTcwu
cwu
ZT
ZRC
zwu
F
RC
Oznaczenia na schematach
co
ZTM -t
cwu
ZT
RW
ZB
RB
zwu
RP
NPW
RS
KS
RO
O
Pco
RC
Pcwu
zwu
Tp
MN
F
ZZ
ZRC
Expansion
vessel
HEATING LOOP
Domestic
hot water
storage vessel
Radiator-type central heating system with one heating loop, mixing valve and storage-type water heater
Central heating
Domestic hot water
Expansion pipe
Safety pipe
Overflow pipe
Tell-tale pipe
Vent pipe
Central heating water circulation pump
Domestic hot water storage vessel filling pump
Room thermostat
Filter
Check valve
Pressure differential valve
Thermostatic radiator valve
Safety valve
Domestic cold water
Domestic water membrane-type expansion vessel
Drain valve
Vent
Pressure reducer
Domestic cold water
Pressure gauge
Three-way mixing valve (thermostatic valve)
Requirements for boiler water
Water used for filling the boiler and central heating system should meet the requirements of PN-93/C-04607 standard.
Connection of safety coil (option for 25 kW model).
Safety temperature limiting device (cooling coil, heat exchanger):
Safety temperature limiter (STB) protects the boiler against overheating in case of interruption of water circulation (e.g.
power outage) and cannot be used for preparation of domestic water. The device has supply and return lines. The
return line should be connected to the drain to cooling sump, and supply line with cold water pipe.
Specifications for safety temperature limiting device:
Minimum supply pressure: 2 bar
Maximum working pressure: 6 bar
Connection: ½”, male thread
Installation of safety temperature limiter (optional)
Models equipped with STB have this device built-in at the factory.
