Section 5: Electrical ConnectionsPage 18
Notes: Some Neutral and Earth connections have been excluded for clarity. Grant Smart Immersion relay to house 2 live
connections. Ensure both are isolated prior to opening housing.
230 VAC
Smart Controls Wiring Centre
15VDC
13 14 15 16 17 18 19 20 21 22
3 4 5 6 7 8 9 10 11 12
1 2
37 38 39 40 41 42 43 44 45 46 47 48 49 50
23 24 25 26 27 28 29 30 31 32 33 34 35 36
+12V
GND
D+
D-
M-BUS
B/C
D+
D-
ASHP Terminals
8
9
24
25
Aerona
³
Heat Pump
1
10
11
12
13
14
26
27
28
29
30
31
32
15
16
L N E
230V
50HZ
5A
N
Immersion
Heater
Relay
14
DHW Sensor
Outdoor Sensor
8
Double
Minature
Circuit
Breaker
Pole
Isolator
13A
20A
L
Blue*
Brown
Cylinder
Immersion
Heater
Brown
Blue*
! NOTE !
This wiring diagram should be read in conjunction with the Grant
Aerona Smart Controls installation instructions and system
schematic HPCS-R001S.
! NOTE !
*Please ensure that neutrals are derived from the same supply to
prevent spurious trips.
N
12
G/Y
G/Y
AB
V4044C
Diverter Valve
B
A
Hot water cylinder port A
(port A normally closed)
Heating circuit port B
(port B normally open)
Blue*
Brown
G/Y
Motor
HTG
2-Port Zone Valve
- Radiators circuit -
Orange
Grey
G/Y
Brown
Blue
23
Touch Screen Display
-UFH Downstairs -
+12V
GND
D+
D-
9
Wired Thermostat/
Wireless Receiver
-Radiator Upstairs-
+12V
GND
D+
D-
10
25
6
+12V
GND
G4
D+
D-
G3
ecoNET
+5V
D+
D-
GND
G3
G1 G2
G4
1 2
3
4
Motor
HTG
Brown
G/Y
Blue
Orange
Grey
26
2-Port Zone Valve
- UFH circuit -
UFH
Circulator
L N E
28
Terminal Block
Place inside Smart
Controller Wiring Centre
Black
Blue
Flow sensor
Brown
A1
1 2
A2
5.7 ELECTRICAL CONNECTIONS - PACK R
Grant UK Drawing Number: HPCS-R001E