4.
Monitor
t
mid
test
point
(yellow)
during
ignition
for
a
rapid
DC
voltage
drop
i.e.
2.0vDC
drop
to
.5vDC
in
10
‐
30
seconds
indicating
restricted
flow.
D.
Plumbing
restrictions:
Supply
line
hot
return
line
warm/cool
while
in
winter
mode.
1.
Summer/Winter
valve
may
allow
fluid
to
bleed
through
if
restriction
is
in
the
hydronic
loop
causing
the
TT
to
appear
to
operate
normally.
E.
Newmar
uses
relays
making
a
single
zone
system
into
two
zone
system
by
controlling
the
heat
register
fans.
1.
The
TwinTemp
thermostat
and
blower
signal
goes
to
the
bank
of
relays
and
then
distributed
to
the
coach
wiring.
F.
Summer
/
winter
valve
positions.
G.
Electric
element
operation.
1.
Used
as
stand
alone
for
limited
hot
water
or
used
in
conjunction
with
propane
to
reduce
propane
consumption
in
either
summer
or
winter
operation.
2.
Overheat
reset
&
electric
element
ECO
3.
Low
fluid
level
in
tank
will
make
boiling
noise
when
electric
element
is
in
use.
H.
Hot
water
production
1.
Mixing
valve.
2.
Summer
hot
water
production,
2.25
gallons
of
antifreeze
heated.
3.
Winter
hot
water
production
delayed
until
5.5
gallons
of
antifreeze
are
heated
causing
short
delay
in
hot
water
production.
1.
Current
vendor
part
issues.
NONE
