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II. If
cleaning
of
the
water
coil
is indicated,
please
carefully
follow
the steps
listed below
to
utTlize
the
freeze
cleaning method.
1.
Turn
off
the heat
pump
and
its
water supply.
2.
Open
a
plumbing
connection on
the
water supply
side,
ifpossible,
to
break
the system
vacuum
and
allow
easier drainage
of
the system and
water
coil.
3.
Drain the water out
of
the
system and
water
coil
via
the
boiler
drains
on
the entering
and
leaving
water lines,
and the
drain on
the heat exchanger.
SWARNING!!
9
FAILURE
TO COMPLETELY
DRAINTHE
WATER COIL HEAT EXCHANGER
COULD POSSIBLY RESULT
INA
FREEZE
RUPTURE!
4.
Set the
thermostat
to "Heat"
to
start the heat
pump
hr the
heating mode
and
quickly
freeze the
coil.
5.
Allow
the heat
pump
to
run
until
it
automatically
shuts
off
on
low
pressure and
then turn
the
thermostat to
the
"Off'
position.
6.
Recap the
water
coil
drain
and
tighten any
plumbing comections
that may
have been
loosened.
7.
If
so
equipped,
open the
field
installed drain cock
on the
water discharge
side
of
the heat
pump,
and
install
a short
piece
of
rubber
hose
to
allow
drainage
into
a
drain or
bucket.
A
drain cock on
the
discharge
side
allows
the
water
flow
to bypass
the
solenoid valve,
flow
valve,
flow
metor,
or
any
other item that may
be
clogged by mineral debris.
Drainage to
a
bucket
helps
prevent
the
clogging
of
drains
and
allows you to
visually
determine
the
effectiveness
of
the
procedure.
8.
Tum
on
the
water supply to
the heat
pump
in
order
to
start the process
of flushing
any mineral debris
from
the
unit.
9.
Set the
thermostat
to "Cool"
and start the heat
pump
in
the
cooling
mode to
quickly
thaw out
the
water
coil.
10.
Run
the heat
pump
until
the
water
coil
is
completely thawed out
and
any
loosened scale,
mineral deposits, or other debris
buildup
is
flushed
completely
from
the
water
coil. Allow
at least
5
minutes
of
operation to
ensure ttrat the
water
coil
is
thoroughly
thawed
out.
1
1.
If
the
water
still
contains mineral debris,
and
if
the
flow
through
the
unit did
not
improve
along
with
an
increase
in
the
temperature difference between
the
water supply
and discharge, repeat the
entire
procedure listed
above.
12.
Reset the heat
pump
for
normal operation.
b.
Chlorine
Cleaning
(Bacterial Growth)
1.
Turn
the
thermostat to the
"Off'
position.
2.
Connect
a
submersible
circulating
pump to the
hose
bibs
on the
entering
and
leaving water
sides
of
the heat exchanger.
3.
Submerse the
pump
in
a
five-gallon pail of
water
and
chlorine bleach
mixture.
The
chlorine
should
be
strong
enough
to
kill
the
bacteria.
Suggested
initial
mixture is
I
part chlorine bleach to
4
parts
water.
4.
Close the
shut
off
valves upsfteam
and
downstream
of
the heat exchanger.
5.
Open the hose
bibs to
allow circulation of
the
bleach solution.
6.
Start the
pump
and
circulate
the
solution through
the heat exchanger
for
15
minutes to
one
hour.
-
The solution should
change
color
to indicate
the
chlorine is
killing
the
bacteria
and
removing
it
from
the heat exchanger.
7
"
Flush
the used
solution down
a
drain by adding
a
fresh water supply to
the
pail.
Flush
until
the
leaving water is clear.
8.
Repeat
this procedure
until
the solution runs clear
through
the
chlorine
circulation
process.
9.
Flush
the
entire
heatpump
system
with
water.
This procedure
can be repeated
annually, semiannually,
or
as
often
as
it
takes
to
keep
bacteria out
of
the heat
exchanger,
or
when
bacteria
appears
in
a
visual
flowmeter
to
the
point
the
flow
cannot be read.
Another
alternative
to
bacteria problems is to
shock
your
entire
well.
Shocking
your well
may give longer term
relief from
bacteria problems
than
cleaning your
heat
exchanger,
but
will
probably
need to be repeated,
possibly
every
three
to
five
years.
tContact
a
well
driller
in your
area
for
more
information.
c.
Miratic Acid
Cleaning
(Difficult
Scaling
and
Particle Buildup
Problems)
1.
Consult installer
due
to
dangerous
nature
ofacids.
2.
Iron
out solutions
and
de-scaling products
are also
useful.
VII.
CONDENSATE
DRAIN
Condensate
traps
are
built into
every GeoSource
DualTEK
vertical unit,
so
an
external trap should not
be
installed. Vertical
units must
be
level to
insure
proper
condensate
drainage. Horizontal
units require
an
external
condensate
trap
in
order to drain water
from
the heat
pump.
Horizontal
units must
also be
mounted level
in
order
for
the condensate
to drain.
3/4"Mnimu
diaq.t'
Air v@t
Het
prrp
bs€
6"
Drop
rfijDua.
3i
Rise
To drain
with
1/8"
pefoot
;n;mm
prtrh
t2
Figure
6
-
Condensate
Drain
-
Horizontal
Units
Only
I
I
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