Troubleshooting
Guide
23|
Page
Table
5
–
Right
Bank
of
Dipswitches
No.
Function
ON
position
OFF
position
1
Change
unit
of
displayed
temperature
C
F
2
N/A
N/A
N/A
(Default)
3
N/A
N/A
N/A
(Default)
4
Activation
of
Individual
operation
mode
Enable
(Default)
Disable
5
6
7
The
number
of
priority
units
for
Easy
‐
link
systems
Two
priority
units
One
priority
unit
(Default)
8
Deactivation
of
the
freeze
protection
firing
system
Enable
Disable
(Default)
9
Deactivation
of
the
exhaust
temperature
control
(Special
purposes
only)
Enable
Disable
(Default)
10
Master/Slave
setting
for
Easy
‐
link
systems
Master
Slave
(Default)
DRAINING
THE
UNIT:
1)
Close
the
manual
gas
shut
off
valve.
2)
Turn
off
power
to
the
unit,
and
then
turn
on
again.
3)
Wait
30
seconds,
and
then
turn
off
power
to
the
unit,
yet
again.
4)
Close
the
cold
water
inlet
shutoff
valve.
5)
Open
all
hot
water
taps
in
the
house,
or
open
the
pressure
‐
relief
valve
to
remove
the
initial
pressure.
When
the
residual
water
flow
has
ceased,
close
all
hot
water
taps.
6)
Unscrew
the
drain
plugs
(hot
water
outlet
drain
plug
and
cold
water
inlet
filter)
to
drain
the
remainder
of
water
out
of
the
unit.
Have
a
bucket
or
pan
to
catch
the
water
from
the
unit’s
drain
plugs.
Wait
a
few
minutes
to
ensure
all
water
has
completely
drained
from
unit.
CLEANING
THE
FILTER:
1)
Drain
the
unit
(procedure
above).
2)
Check
the
water
filter
located
within
the
cold
inlet.
With
a
tiny
brush,
clean
the
water
filter
of
any
debris
which
may
have
accumulated
and
reinsert
the
filter
back
into
the
cold
water
inlet.
Figure
24
