Potterton eurocondense four 125 kw, Installation, Operation And Maintanance Manual, Page: 120 / 148

Y12 3. Heating circuit mixer CLOSED
Y19 Primary control mixer OPEN
Y20 Primary control mixer CLOSED
B1 Flow sensor HC1
B6 Collector sensor
B7 Return sensor
B12 Flow sensor HC2
B14 Flow sensor HC3
B15 Flow sensor primary control
Relay output QX21 module 1(7301), Relay output QX22
module 1, (7302), Relay output QX23 module 1, (7303), Relay
output QX21 module 2, (7376), Relay output QX22 module 2(7377)
und Relay output QX23 module 2 (7378) , Relay output QX21
module 3 (7451), Relay output QX22 module 3 (7452) and Relay
output QX23 module 3 (7453)
None: Relay outputs deactivated.
Circulating pump Q4: The connected pump serves as a DHW circulation
pump (see prog. no. 1660).
El imm heater HW K6: With the connected immersion heater, the DHW
can be charged according to the operating side DHW storage operating
line immersion heater.
Note
The operating mode is set under prog.no. 5060.
Collector pump Q5: Connection of a circulating pump in case of solar
collector use.
Consumer circuit pump VK1/2: Connection of a pump at the input
Q15/18 for an additional consumer, which is requested via an Hx-input.
Boiler pump Q1: the connected pump is used for recirculation of the boil­
er water.
Bypass pump Q12: the connected pump is used as a boiler bypass
pump, which is used for boiler return temperature control.
Alarm output K10: Any new fault will be signalled by means of this alarm
relay. The contact is closed with the delay time selected under prog. no.
6612. If no fault message exists, the contact opens without delay.
Note
The alarm relay can be reset without having the fault remedied
(see prog. no. 6710). The alarm relay can also be closed tempora­
rily by a message which, for example, leads to restart.
heating pump CH3 Q20: Activating the pump heating circuit HC3.
System pump Q14: Connection of a feed pump.
Heat gen shutoff valve Y4: Connection of a changeover valve for hy­
draulic de-coupling of the heat generator from the rest of the heating
system.
Solid fuel boiler pump Q10: Connection of a circulation pump for the
boiler circuit for the connection of a solid fuel boiler.
Time setting 5 K13: The relay is controlled by time program 5 according
to the settings.
Buffer return valve Y15: This valve must be configured for return temper­
ature increase/decrease or the buffer storage tank partial charging.
Solar pump ext exch K9: The solar circuit pump for the external heat ex­
changer K9 must be set here.
Solar ctrl elem buffer K8: If several exchangers are connected, the buf­
fer storage tank must be set at the respective relay output and the type
of solar regulating unit must be defined under prog.no.5840.
Solar ctrl elem swi pool K18: If several exchangers are connected, the
swimming pool must be set at the respective relay output and the type of
the solar regulating unit must be defined in prog.no. 5840.
9 Settings
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