Fujitsu WATERSTAGE WOYG160LJL Maintenance Document page 7

Faults external to the heat pump
Any safety device (e.g. thermostat pressure switch)
wired to input EX3 (E20) allows external problems to be
reported and the heat pump to be immediately stopped.
For example, a safety thermostat on the heating fl oor
can be wired to input EX3 (E20) to avoid excessively
high temperatures in the fl oor.
Power shedding or EJP
Tariffs, peak times/off-peak times,
Tariff s, peak times/off -peak times,
External component
contact*
External component contact*
(faults, load
(faults, power limiter, electricity meter)
shedder, power meter)
* If the control device does not provide a potential-free contact, the contact must be relayed to create equivalent wiring. In all cases, please refer
to the instruction manuals for the external components (load shedder, power meters) to create the wiring.
** Option
The connection of terminal 3 of the room control unit is not mandatory (lighting of the room control unit).
fi g. 2 - Connections to the heat pump regulator (accessories and options)
Waterstage / Maintenance Manual / 2105 - EN
Power limitation or EDR
(Energy Demand Reduction)
(peak day removal)
day / night day/night
External fault
External fault
L
EX1
X11
EX2
EX3
X86 X84
M B9
5 6 4 5 6 4 5 6
2 1 3 2 1 3 2
or or
** Room
thermostat
** Room ** Room control
T55
control unit unit radio
T75 T78
Outside
Outdoor
sensor
sensor
1
or
** Room
thermostat
radio T58
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