Certikin MB20S, Operating, Installation And Servicing Instructions

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3.0 Installation
23
Genie S
Operation
• Turn on all the heaters with their pool tempera-
ture controls.
• The master will show temperatures and the
slaves will show “---”.
• Set the required temperature on the master and
provided there is an electrical demand at the
master’s pool demand connection, the heaters
will operate.
Features
• A master is the only heater with a pool sensor
connected, move the sensor and the master
changes.
• If the master pool temperature control is
turned off , none of the heaters will operate.
• If a slave’s pool temperature control is turned
off it will not operate. The master will know and
alter its control accordingly.
• If the master heater is in a fault situation and
is unable to safely operate (i.e.in “lockout”), it
should still continue to control the slaves.
• If the master control fails the ‘system’ will fail. If
this should occur perform the following:
Change the master to a slave and one of
the slaves to a master to enable the system
to operate again.
• If a slave is in a fault condition, that slave will
not operate as part of the group.
• If a slave has poor pool fl ow or low primary
system pressure (activated by their respective
pressure switches) the burner will stop im-
mediately and the slave will be removed from
the group. This is indicated by the yellow fi lter
LED on the front control panel. The master will
check approximately every 3 minutes and if
the issue has been resolved the slave will be
added back to the group.
• The Master display can be altered in setup
mode like a single heater
(see 5.2 for details).
• Unlike a single heater, there is no modulation
of individual burners.
• Turn on mains power, then switch on all the
heaters. After a short self-test the master
should show the actual temperature, and the
slaves three dashes “---”. If a slave continues
to show a display of dashes, this indicates it
not correctly connected to the master, check
the interconnection cable plugs are fully home.
• Replace the panels.
Displays
• The master display is just like a single heater.
• A slave will display “---” when working as part of
the group. It will show all the fault conditions of
a single heater, however If “P/OC” is displayed
on the control panel this indicates that a com-
munication problem with the master. Check the
cables and connections.
• The pool demand LEDs work as a single heat
er. on when operating, off when off , and fl ashing
if not needed by the Master.
• The warning LEDs work for all in a group, as
per a single heater.
Fig. 10.2
Pool Temp Sensor wires