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Viega Hydronic Mixing Block User Guide
UG-HC 566234 0720 Hydronic Mixing Block
Conceptual
Electrical
Schematic
W
iring
■
This dr
awing shows syst
em wiring concept
only
. Installer is r
esponsible for all equipment
and detailing r
equir
ed by local codes.
■
All wiring shall be in conformance with the lat
est edition of the National Electrical Code.
■
Maximum curr
ent r
ating of the Hydr
onic
Mixing Block is 1 AMP
.
■
Consult with contr
ol / boiler manufactur
er for
limitations and installation instructions.
■
Do not run the wir
es par
allel t
o t
elephone
or power cables. If the sensor wir
es ar
e
locat
ed in an ar
ea with str
ong sour
ces of
electr
omagnetic int
er
fer
ence (EMI), shielded
cable or twist
ed pair should be used or the
wir
es can be run in a gr
ounded metal conduit.
If using shielded cable, the shield wir
e should
be connect
ed t
o the Com t
erminal (t
erminal 4)
on the contr
ol and not t
o ear
th gr
ound. Use
18 A
WG copper wiring for all sensor wiring.
Sensors should be locat
ed befor
e the closely
spaced t
ees.
Legend:
Basic
Heating
Contr
ol
Sensors
P1
= P
rimar
y L
oop Cir
culat
or
Low V
oltage
S1
= Boiler Sensor
Line V
oltage
S3
= Outside Sensor
End Switch fr
om Z
one Contr
ol or
Thermostat (Dr
y or P
ower
ed Contact)
Outdoor
Sensor (S3)
P
ump and
Boiler Relay
120 V A
C
Power Supply
P
rimar
y L
oop
P
ump (P1)
Boiler
Sensor (S1)
Boiler