Grant Aerona - Connecting Pumps; Connecting 3-Port Mixing Valves; Connecting Relays; Smart Flow Sensor

Section 3: Installation Page 9
3.5.3 TEMPERATURE SENSOR RESISTANCE
The accuracy of the temperature sensors can be checked by
measuring their resistance at a given temperature. In case of
signicant di󰀨erences between measured resistance value and
values in Table below, the sensor should be replaced. (See Table
3-3)
Table 3-3: Temperature/Resistance chart
Water and Outdoor Weather sensors (10kΩ NTC)
Temp (
o
C) Nom (Ω)
-30 175200
-20 96358
-10 55046
0 32554
10 19872
20 12488
30 8059
40 5330
50 3605
60 2490
70 1753
80 1256
90 915.4
100 677,3
110 508,30
120 386,60
3.6 CONNECTING PUMPS
Electrical connections from the circuit pumps to the controller
should be according to the electrical schematics. See Section 4.
3.7 CONNECTING 3-PORT MIXING VALVES
The Grant Aerona Smart Controller should only be used with
valve actuators equipped with limit switches and the 3-Port mixing
valves can only be tted as part of an adjustable circuit. Refer to
Appendix C for further details on 3-Port mixing valves.
A water temperature sensor will also need to be installed after the
mixing valve to measure the mixed water ow temperature for the
circuit.
3.8 CONNECTING RELAYS
A relay for supplementary heating from a Bu󰀨er, Volumiser, Low
Loss header and/or DHW cylinder can be used in conjunction with
the Grant Aerona Smart controller.
They are to be connected via H1 (Bu󰀨er, Volumiser or Low Loss
header) or H2 (DHW Cylinder) as the terminals are preset to the
functions within the Smart Controller software.
Grant UK supply the Grant Smart Immersion relay as part of our
installation packs. See Appendix D for further guidance on wiring
specics.
3.9 SMART FLOW SENSOR
The Grant smart ow sensor monitors the return ow rate to the
heat pump. Refer to Appendix E for installation and conguration
requirements.
3.10 ROOM THERMOSTAT CONNECTION
For optimum operation of the Grant Aerona Smart Controller each
circuit within the system should have an individual thermostat
assigned to it.
The room thermostats connect to the wiring centre and can
utilise the weather compensation function to automatically adjust
the ow temperature within the circuit to provide a consistent
room temperature. The required temperature is set on the room
thermostat of the circuit concerned.
It is recommended to use the touchscreen as a room thermostat.
3.10.1 ROOM THERMOSTAT WIRING
The Grant Aerona Smart controller can support multiple wired
room thermostats (including the touchscreen display). You
will need to ensure the correct polarity of the connections are
respected when wiring the room thermostats/touchscreen display
in parallel to the wiring centre. (Refer to Figure 3-8).
With the connections made you will need to pair and assign the
room thermostats with their own address.
See Appendix A for installation and operation guidance.
! CAUTION !
Maximum length of wires should not exceed 30m. This
length may be longer if the wires used have cross-Section
exceeding 0.5 mm
2
.
3.10.2 WIRELESS ROOM THERMOSTAT
Connecting a wireless room thermostat requires connecting the
wireless receiver to the G1 socket in the same fashion as the
wired thermostat and pairing between the wireless receiver and
thermostat. The wireless receiver can support up to 3 wireless
thermostats.
See Appendix B for Installation and operation guidance.
! NOTE !
Close attention must be paid to the 4 connections (+12V,
GND, D+ and D-). Ensure they match to corresponding
wires from touchscreen display. (+12V is also referenced
as VCC).
3.11 CONNECTING THE WI-FI HUB
The Wi-Fi hub should be connected between the USB socket
and the G3 socket of the wiring centre using the ecoLINK cable
supplied. Refer to Section 10 for installation and user guidance.
LED
P
D- D+
GND
+12V
D-
D+
GND
+12V
+12V GND D+ D-
+12V
GND
D+
D-
Touchscreen
display
Wired
Thermostat
Wireless
Receiver
Wiring Centre
G1 Socket
Figure 3-8: Wired and Wireless wiring schematic