Wiring Diagrams - Grant QR Range Installation, Servicing And User Instructions Manual

5.9

WIRING DIAGRAMS

The wiring diagram shown below demonstrates how the electrical components supplied with the Grant QR integrated indirect
heat pump cylinder are wired from the factory.
* in order to achieve independent time control for the DHW zone, the link between terminals 33 and 34 of the EP001 wiring centre must
be removed before connecting your chosen time control option. For detailed information on the operation of the Grant EP001 wiring
centre, please refer to Grant UK DOC 0176.
GRANT
RL4
EP001 - Wiring centre.
Issue 5
All Fuses
230Vac Anti-surge
F1 1A 1A
F2
LED1 LED2
Clock Stat Pump Clock Stat Pump
L L L L L N L L L L L
1 2 3 4 5 6 7 8 9 10 11
HTG
Motor
G/Y
2-Port Zone Valve
- Zone 1 -
Page 18
RL3
Mains
Power
Hot Water
Priority
1A F4 1A
F3
LED3 LED4
Clock Stat Pump Clock Stat
N L L L L L N L L L L
12 13 14 15 16 17 18 19 20 21 22
Grey Do not
Brown
connect HTG
Motor
Blue
Orange Do not
connect G/Y
2-Port Zone Valve
- Zone 2 -
Figure 5-2: Grant QR integrated indirect heat pump cylinder wiring diagram
52 51 50 49 48
OUT IN NC2 C2 NO2 NO1 C1 NC1
S1
DANGER HIGH VOLTAGE |
F5 5A F7 1A
3.15A F6 6.3A F8
LED6
C2
LED7
Pump Clock
Spare
L N L
L N L N L N L N
23 24 25 26 27 28 29 30 31 32 33
Link*
Grey Do not
connect
Orange Do not
connect
Hot Water
Immersion
N L
Heater
G/Y
Brown
Blue
N L
LOAD
SUPPLY
N L
Greenbrook T205-C
Immersion Timer
(indepently switched and
fused at 13A)
47 46 45 44 43 42 41 40 39
OP2 OP1
LED5
C1
VAR1
VAR2
Cyl
Stat Pump
L L L L N
34 35 36 37 38
Brown
Motor
Blue
G/Y
2-Port Zone Valve
Dual Thermostat
L N
Brown
Blue
Section 5: Electrical
Grey
Do not
HW
connect
Orange
Do not
connect
- DHW -
Digital
1 C 2
Grey
Black