Electrical Diagrams - Heatrae Sadia HI-MAX INSTANT ID 5-60 Installation, Operation And Maintenance Manual

3.7 Electrical diagrams

Figure 13: Wiring diagram for the heating and hot water controls
230VAC
MAINS
SUPPLY
ROOM STAT
SWITCH
N.O.
N.O. OR N.C.
N.C.
PICV
MODULATING
MOTOR
M
FLOW SWITCH OR
PREPAYMENT CONTACT
LOW PRESSURE
SWITCH
DANGER
Ensure the HIU is earthed in accordance with BS EN 7671:2008

A safe means of electrically isolating the HIU must be provided.
12
630mA
FUSE
COM 24VAC Y OPT.OUT OPT.IN
- -
MIX + +
BLACK
CONTROL
RED
GREY
N.O.
N.C.
BROWN
M
PUMP
MOTOR
BLUE
L N
N
230VAC IN PUMP
mA
VDC
AUX PRESS. CHRONO FLOW METER
T. EXT
SWITCH SWITCH THERM C - +
RED
BROWN
BLACK

For information on outdoor sensors and weather
compensation refer to separate document.
SAFETY THERMAL SWITCH
BLUE
M M
BLACK
BROWN
L1
L1 N L2
DIVERTING VALVE
T. HEAT T. DHW
T. AUX
T.ACS
T.RISC
100R
COLD WATER
HALL
FLOW
EFFECT
METER
SENSOR
Safety thermal
switch fitted to
protect low
temperature
N.C.
heating systems.
(By others).
DUAL
MOTOR
DIVERTING
VALVE
DHW FLOW SENSOR
NTC10K
HTG FLOW SENSOR
PT1000
HTG RETURN SENSOR
PT1000
OUTDOOR SENSOR
PT1000