Electrical Wiring Diagram Solar Heating System - Lochinvar HWH 32-220 G CE Installation, Commissioning, User & Maintenance Instructions

12.6
Cable colors:
1 Brown
2 Blue
3 Green
4 Black
5 White
6 Grey/Beige
7 Green
8 Yellow
Terminal strip connections:
Earth
A
N Neutral
L Live input of controller
L Live input for the solar heating
3
system modulating pump
PWM+ PWM+ control signal for
controlling solar heating system
modulating pump
PWM- PWM- control signal for
controlling solar heating system
modulating pump
0311767_HWH_32-129_II_UKUK_V2.4, 2020-01-31

Electrical wiring diagram solar heating system

Components:
AA Control
BB Solar heating system pump
[VAC]
(modulating) (230 VAC)
BB Solar heating system pump
[PWM]
(modulating) (PWM-signal)
CC Temperature sensor
(S - solar collector)
1
DD Temperature sensor (S
EE Combined Q/T sensor
(incl. temperature sensor S
solar collector return)
FF Communication between the
water heater controller and the
solar heating system controller
(BUS-link)
GG Temperature sensor
(S - top of storage tank)
3
K Double-pole isolator
Controller connections:
J12 Connection of combined Q/
T sensor (1-2-3-4)
J13 Connection of temperature sensor
S (2-4)
1
J14 Connection of temperature sensor
S (2-4) and temperature sensor
2
S (1-3)
3
J16 Connection of BUS-link
- tank)
2
communication
J18 Connection of PWM-signal solar
4–
heating system pump
F2 Fuse (T 3.15A - 250 V)
119