Tankless Coil Boiler Application - Priority Figure 3a.
1
3
Opera
�
on:
When
any
thermostat
calls
for
heat,
the
boiler
is
given
a
signal
to
start.
The
appropriate
circulator
is
energized
only
when
the
boiler
temperature
is
above
the
low
limit.
Priority
Opera
�
on:
When
Zone
6
is
switched
to
the
priority
se
�
ng
and
is
ac
�
vat
‐
ed,
all
other
zones
will
stop
opera
�
on
un
�
l
zone
6
is
sa
�
s
ed.
When
Zone
6
is
not
switched
to
priority,
all
zones
will
operate
independently.
Jumper
Placement:
REMOVE
the
jumper
between
terminals
ZC
and
ZR.
Connect
termi
‐
nal
ZC
to
ZC
terminal
on
the
aquastat
control.
Connect
terminal
ZR
to
ZR
terminal
on
the
aquastat
control.
Con
rm
polarity
is
con
‐
sistent
between
the
boiler
aquastat
and
the
switching
relay.
Power
input:
Connect
120
volt
as
power
input
to
terminals
N
and
H.
Neutral
wire
to
terminal
N.
Hot
wire
to
terminal
H.
Содержание MP 20
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