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

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Heat generation lock: The boiler is locked if contact at EX21 is closed.
Error/alarm message: Closing the input EX21 results in a control unit-in­
ternal fault message, which will also be signalled via a relay output pro­
grammed as an alarm output or in the remote management system.
Excess heat discharge: An active excess heat discharge enables, for
example, an external source to force the consumers (heating circuit,
DHW storage tank, heating circuit pump) to draw off the excess heat us­
ing a signal.
Funct output UX21 module 1 (7348), Funct output UX22
module 1 (7355), Funct output UX21 module 2 (7423), Funct
output UX22 module 2 (7430) , Funct output UX21 module 3
(7498) and Funct output UX22 module 3 (7505)
None: No function.
Boiler pump Q1: The connected pump is used for recirculation of the
boiler water.
DHW pump: Actuator for DHW storage tank.
DHW intermediate circuit pump Q33: Actuation of a charge pump for do­
mestic hot water storage with external heat exchanger.
Heating circuit pumps HCs: Activation of the pump heating circuits HC1-
HC3.
Collector pump: Actuation of a circulating pump when a solar collector is
used.
Solar pump ext. exchanger K9: The solar circuit pump for the external
heat exchanger K9 must be set here.
Solar pump buffer K8: If several exchangers are connected, the buffer
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 pump swimming pool K18: If several exchangers are connected,
the swimming pool must be set at the respective output and the type of
the solar regulating unit must be defined in prog.no. 5840.
Solid fuel boiler pump Q10: Connection of a circulation pump for the
boiler circuit for the connection of a solid fuel boiler.
Signal output UX21 module 1 (7350), Sign logic out UX22
module1 (7357), Signal output UX21 module 2 (7425) und Signal
output UX22 module 2 (7432)
Specifies whether the signal is to be outputted as a 0..10V signal or pulse
width modulated (PWM) signal.
9.2.22 Input/output test
Input/output tests (7700-7872)
Tests for checking the function of connected components.
9.2.23 Status
Status requests (8000-8011)
With this function the status of the selected system can be requested.
Tab.15 Status table heating circuit
The following messages are possible under Heating circuit:
End user (Eu) Commissioning, Engineer (menu
Status)
Limitter has tripped Limitter has tripped
Manual control active Manual control active
Floor curing function active Floor curing function active
Heating mode restricted Overtemp protect active
Restricted, boiler protection
Restricted, HW priority
9 Settings
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