20| SAHP - Installation Manual
V3 June 2021US - SD667052
ELECTRICAL
INSTALLATION continued
SECTION 6
PV
connectivity
6.5
/Ài«>ViÌ iiÀÃwÀÃÌ`ÃÃViVÌÌ i«ÜiÀÃÕ««Þ>`
drain the tank. disconnect the immersion wiring before unscrewing
the immersion heater. Screw in the new immersion heater - reconnect
Ì iÜÀ}]ÀiwÌ iÌ>>`ÀiViVÌÌ iiiVÌÀV>ÃÕ««Þ°
6.6
Correct wire sizing must be carried out based on the power, wire
length and wire enclosures however in most domestic applications
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to relevant local and national standards should be used.
6.7
Do not energize the immersion heater until the cylinder has been
yÕÃ i`>`wi`ÜÌ Ü>ÌiÀ>ÃÌ ÃÜV>ÕÃi`>>}iÌÌ iiiiÌ°
6.8
Do not operate the immersion heater if any cleaning agents are in the
cylinder as this will also cause premature failure of the immersion element.
6.9
The SAHP Heat Pump controller has the functionality to connect to a
Solar PV PV inverter system. If you are not connecting the SAHP to a PV
Inverter proceed to section 7.
6.10
To connect the SAHP to a PV inverter a 2 conductor wire is required.
There is no maximum or minimum distance requirements of this 2
conductor wire. The cable will be carrying a voltage free signal.
6.11
iVÌÌ iÓVÀiV`ÕVÌÀÌÌ iÕVVÕ«i`ÌiÀ>Ãx>`n
as per the wiring diagram, located on the SAHP controller sensor
terminal located on the top right hand side of the back of the
controller. Connect the other end of the two core cable to a
N/O relay of the PV inverter.
6.12
In cases where a N/O relay is not available within the inverter,
the controller can be connected via a 2 conductor voltage free
wire to an independent 7 days timer instead which allows the
VÌÀiÀÌLi>ÕÌ>ÌV>Þ>VÌÕ>Ìi`>Ì>«Ài`iwi`À>}iv
hours which can correspond to the assumed maximum PV energy
generation.
6.13
When the PV inverter generates electricity, the N/O relay will
close, which will subsequently signal the controller to
enter Eco Mode, a programme in which SAHP will automatically
raise the set point temperature input of the controller of the water
within the connected cylinder to 140°F and re initiate heating
again once the water temperature falls below 135°F.
Controller
