Potterton eurocondense four 125 kw Installation, Operation And Maintanance Manual page 110

9 Settings
110
Ctrl boiler pump/HW valve (5774)
With this parameter it can be defined for special hydraulic systems that the
boiler pump Q1 and the diverting valve Q3 only are responsible for DHW
and heating circuit 1, however not for heating circuits 2 and 3 or for the ex­
ternal consumer circuits.
All requests: The diverting valve is connected hydraulically for all re­
quests and switches between DHW mode and the remaining requests.
The boiler pump runs for all requests.
Request CH1/HW only: The diverting valve is connected hydraulically
only for heating circuit 1 and DHW and switches between DHW mode
and heat circuit 1 mode. All other requests are not connected hydrauli­
cally via the diverting valve (DV) and the boiler pump, but rather directly
connected to the boiler.
Solar controlling element (5840)
The solar heating system can also be operated with charging pumps in­
stead of with a collector pump and diverting valves for the storage tank
connection.
Charging pump: When used with charging pump all exchangers can be
flowed through simultaneously. Parallel or alternative mode is possible.
Diverting valve: When used with a diverting valve only one exchanger
can be flowed through. Only alternative mode is possible.
External solar exchanger (5841)
For solar schemes with two storage connections it must be set whether the
external heat exchanger is present and is used
for one of the two .
fer storage or only
Combi storage tank (5870)
Combined storage-specific functions are activated with this setting. For in­
stance, the buffer storage immersion heater can be used for heating as
well as for DHW.
No: No combined storage exists.
Yes: A combined storage exists.
Relay output QX1 (5890), Relay output QX2 (5891) und Relay
output QX3 (5892)
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.
Cons circuit pump VK1 Q15: 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
boiler water.
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.
Cons circuit pump VK2 Q18: Activating the consumer circuit VK2.
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.
together for DHW and buf­
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