For
Hot
Water
TwinTemp
unit
and
water
system
pump
must
be
turned
on
or
connect
to
city
water
system.Turn
on
hot
water
tap.
Note:
During
heavy
heat
and
hot
water
demand,
the
hot
water
system
takes
priority
and
the
heat
register
blowers
may
shut
off
briefly
to
maintain
hot
water
supply.
Hot
water
temperature
is
factory
set
at
approximately
120
degrees.
To
change
temperature,
consult
the
operating
manual.
Once
the
tank
reaches
set
temperature
(5
‐
15
minutes
after
system
is
turned
on),
continuous
hot
water
is
delivered
when
any
tap
is
opened.
Delivery
temperature
is
determined
by
the
setting
of
tempering
valve
Warning:
this
valve
is
factory
set
at
about
120
˚
F.
adjusting
temperature
any
higher
could
result
in
severe
injury
due
to
scalding.
Tank
thermostat
turns
pump
1
and
burner
on
automatically
when
tank
temperature
starts
to
drop.
Anti
‐
freeze
circulates
from
burner
and
back
to
tank
as
it
heats.
Burner
remains
in
high
fire
and
gas
modulates
burner
to
low
burn
until
set
temperature
is
attained.
When
set
temperature
is
reached,
burner
and
pump
shut
down
and
system
returns
to
stand
‐
by
mode.
Winter
Mode
Hot
Water
Production
During
winter
operation
if
the
system
has
been
dormant
for
more
than
20
minutes
turn
on
interior
thermostat
to
call
for
heat.
When
the
heat
register
blowers
come
on
turn
off
thermostat
and
turn
on
hot
water
tap.
Preheating
the
system
is
required
in
winter
mode
for
hot
water
production
due
to
3
gallons
of
cold
fluid
in
the
hydronic
loop
suddenly
being
returned
to
the
TwinTemp
tank
lowering
the
fluid
(boiler
antifreeze)
temperature
required
for
hot
water
production.
Once
fluid
temperature
reaches
set
temperature
the
system
will
make
continuous
hot
water.
To
Use
With
110
Volt
Heating
Element
Turn
on
110
volt
element
switch
located
inside
coach.
Let
the
unit
heat
up
for
a
minimum
of
30
‐
60
minutes.
Note:
In
the
110
volt
mode
of
operation
the
electric
element
supplies
the
heat
until
demand
exceeds
its
capacity
at
which
time
gas
burner
automatically
ignites.
The
TwinTemp
Jr.
is
equipped
with
one
110
VAC
electric
heating
element.
The
element
provides
limited
amounts
of
hot
water
or
space
heating,
such
as
washing
hands
or
dishes.
The
electric
element
can
be
used
with
or
without
the
propane
burner,
but
for
continuous
hot
water
or
space
heat,
the
propane
burner
must
be
used.
To
operate,
turn
the
110
volt
switch
on
in
the
coach.
For
small
amounts
of
hot
water
only,
there
is
no
need
to
turn
the
12
volt
power
on
to
the
TwinTemp
.
However,
if
space
heat
is
required
in
very
cold
weather,
the
12
volt
switch
should
be
turned
on.
If
there
is
a
higher
demand
for
heat
than
the
110
volt
element(s)
can
provide,
the
propane
burner
will
activate
automatically.
For
best
operation,
turn
the
110
volt
element
on
about
30
minutes
before
turning
12
volt
switch
on.
This
allows
the
tank
to
come
up
to
temperature
utilizing
the
electric
element
before
the
burner
can
activate.
This
will
help
conserve
propane.
