30
31
He
ating and Ho
t W
ater Sys
tems Split
He
ader
,
Buff
er or
H
eat
Ex
chang
er
Pump Z1
Flo
w and r
eturn
1 1/4” f
emale
Z1
Z2
The 3 port v
alv
e MU
ST g
o
A t
o DHW and B t
o He
ating
Split Installation
Split Installation
Powe
r
the Hit
achi sys
tem needs 2 po
w
er supplies
Immer
sion he
at
er
is c
onnec
ted t
o 31 Liv
e and 30 Neutr
al;
Communic
ation c
able
c
onnec
t t
o the c
ontr
ol bo
x, t
erminals 1 and 2.
Remo
te c
ontr
oller
c
onnec
t t
o 3 and 4.
Cylinder sensor
c
onnec
t this using 5 and 6
Run signal
, 13 is permanently 240V ac. The run signal g
oes int
o 14. R
emo
ve the link
.
Pump Z1
Liv
e 14 and Neutr
al 34 on a c
ombi wir
e liv
e t
o 36
3 port
c
onnec
t liv
e t
o 32 and Neutr
al t
o 34 the or
ang
e and gr
ey wir
es ar
e no
t used.
If a lo
w loss he
ader or buff
er is used y
ou c
an c
onnec
t a
buff
er sensor
in 8 and 9
Wiring Diagr
am He
ating and Ho
t W
at
er Split
Pump Z1
Remo
te
Contr
oller
He
ating run
signal fr
om
st
at or ufh
3 port Monobloc split and ht only
Comms t
o
Out
door Unit
Powe
r
20 Amps
Immer
sion He
at
er 13A
Cylinder sensor up t
o 75m long
2 Cor
e fle
x
0.75mm
No
te if y
ou w
ant t
o use the he
ating b
ack
up he
at
er in the Split
you need a bigg
er po
w
er supply
. Ano
ther 13 Amp
s f
or the 2
and 3HP model and 26 Amp
s f
or the 4-5 and 6 kW
