Water supply
Never
operate
the
heat
pump
without
water
flowing
through
its
water-to-refrigerant
heat
exchanger
coil.
This
may
cause
severe
damage
to
the
unit.
For
proper
water
flow
rates,
refer
to
the
unit
catalog.
Condensate
Condensate
Condensate
Condensate
Drain
Drain
Drain
Drain
See
Figures
7
and
8
The
condensate
drain
is
set
up
for
a
7/8-inch
OD
copper
connection.
The
condensate
pipe
or
hose
installed
must
have
a
minimum
1-inch
trap
in
the
condensate
line.
All
condensate
piping
must
pitch
away
from
the
unit
for
proper
drainage.
Check
local
codes
for
compliance.
Note:
Note:
Note:
Note:
All
vertical
units
have
an
internal
1-inch
trap
built
into
the
condensate
line.
All
units
require
a
field-installed
condensate
line.
Figure
7:
Condensate
trap
detail
–
vertical
unit
5.
After
it’s
been
completely
cleaned
and
drained,
fill
loop
with
water
at
an
alkaline
level
of
approximately
pH
7.5.
6. Connect
heat
pump
to
the
piping
loop.
7.
Make
sure
all
entrained
air
is
purged
from
loop
and
each
unit
is
operating
at
its
specified
flow
rate.
Figure 8: Condensate trap
detail
–
horizontal
unit
Drain Pan
1" Min. Internal Trap
(By Mammoth)
Closed
Closed
Closed
Closed----Loop
Loop
Loop
Loop
Systems
Systems
Systems
Systems
Follow
these
steps
to
install
closed-loop
systems.
1.
Leave
unit
unconnected
or
isolated
using
shutoff
valves
as
building
water
loop
is
initially
flushed.
2.
Fill
water
system
with
1
lb.
trisodium
phosphate
for
every
50
gallons
of
water.
3.
Purge
piping
of
trapped
air;
set
supplemental
heater
to
maintain
110
F;
and,
circulate
solution
for
approximately
8
hours.
4.
Drain
system
completely
and
repeat
the
entire
flushing
process,
if
necessary
Optional
Optional
Optional
Optional
Hose
Hose
Hose
Hose
Kits
Kits
Kits
Kits
W
W
W
Water
ater
ater
ater
Hoses:
Hoses:
Hoses:
Hoses:
300mm
and
600mm
flexible
water
hoses
are
available
for
connections
to
the
heat
pump
and
adapters.
Use
two
properly
sized
wrenches,
one
on
the
unit
FPT
fitting
and
one
on
the
hexagonal
fitting
when
connecting
hoses.
Do
not
use
wrench
on
hose
or
on
the
sleeve
that
crimps
the
fitting
onto
the
hose.
Hoses
must
not
be
pulled
taut,
twisted
or
kinked.
Connections
should
not
be
over
tightened.
Before
pressurizing
the
water
system,
closely
inspect
hoses
and
fittings
to
be
sure
there
are
no
cuts,
abrasions,
twists,
or
kinks.
Make
sure
hoses
will
not
be
in
contact
with
any
sharp
surface
or
edge
while
in
use.
4
7/8" O.D.
Condensate
1" Min. Internal
Trap (By Others)