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side
return and
supply
water
temperatures.
A
water
temperature rise
of
10"F
to
15oF
is normal
(variation in
water temperature and water
flow
rate
can cause
slight
variations).
Use
a
single pressure gauge
to
check
the
fluid
pressure
drop
through
the
heat
exchangers to
ensure
proper
flow
for
the system.
Set
the
system
to
the
"OFF"
position.
The compressor
will
shut
down
in
I
to
2 seconds.
Next, turn the
setpoint
to
its
lowest
setting. Place
the
system
to run in
cooling. The
compressor
will
start
after an anti-short-cycle period
of 70
to
130
seconds
from its
last
shutdown.
The anti-short-cycle period
is
indicated by
the
red
light
on the
controller.
After
5
minutes
of
cooling
operation, check hydronic
side
return and
supply
water
temperatures.
A
water
temperature
drop
of
10"F
to
15'F is normal (variation
in
water
temperature and
water
flow
can
cause
slight
variations).
Use
a single
pressure
-sauge
to
check
the
fluid
pressure
drop
through
the heat
exchangers to
ensure
proper
flow
for
the system.
Set the system and
the setpoint
for
normal operation.
Instruct the owner on correct operation
of
the
entire
heat
pump
system.
The
unit
is now operational.
X.
SERVICE
and
LOCKOUT
LIGHTS
With
proper installation,
the
ECONAR GeoSource
2000
hydronic
heat
pump
requires
only minor
maintenance,
such
as periodic
cleaning
of
the
ground
water
heat
exchanger
for
heat pumps installed
in
ground-water
applications. Setting
up
regular
service checkups
with
your ECONAR
dealer
could be
considered.
Any
major
problems
with the
heat
pump
system
operation
will
be
indicated on
the
lockout
lights.
VCAUTION
-
During
evacuation
of
refrigerant
of
a
system
not having
antifreeze
protection
of
either
the
ground-side or
the
hydronic-side,
water
in
the
unprotected
heat exchanger must be removed
or continuously
flowing
to
avoid
a
potential
heat exchanger
failure
caused
by
freeze
rupture.
The
heat
pump controller
(and
a
room
thermostat,
if
part
of
the
system
installation)
will
display a
system lockout.
If
lockout
occurs,
follow
the
procedure below:
1)
Determine and record
which
indicator
lights on
the
Controller
are
illuminated.
(Refer
to
Section
XIV
for
more information
on
possible
causes
of
Lockout
Conditions.)
2)
Check
for
correct water supply
from
the ground
loop
or ground water
system.
3)
Check
for
correct water supply on
the
hydronic
side.
4)
Reset
the
system
by
disconnecting
power
at
the
circuit
breaker
for
one
minute
and then
reapplying.
5)
If
shutdown reoccurs,
I
call your ECONAR
dealer.
Do
not
continuously
reset
the
lockout condition
or
serious damage
may occur.
eNote
-
Improper
fluid
flows
or
incorrect antifreeze
levels
are
the
cause
of almost
all
lockouts.
XI.
ROOM THERMOSTAT
OPERATION
Installations may include
a
wide variation
of
available
electronic room thermostats,
and most
of
them require to
be
configured by
the
Installer
(according to
the
Installation
Guide included
with
the
thermostat)
and
checked
out after being installed.
elmportant
-
Al
a
minimum:
1.
Ensure the
thermostat
is set up
for
the
"System
Type"
it
is installed
on.
2.
Ensure the
thermostat
is
configured
for
"Manual
HeailCool
Changeover."
3.
Change
other
Installer
Settin-es
only
if
necessary"
4.
Remember to
press
"Done" to
save
the
settings
and
to
exit "Installer
Setup."
5.
Run
the system
through
all
modes
of
operation
in
the
thermostat instructions to
ensure
correct operation.
XIT.
DESUPERHEATER
(OPTIONAL)
A
GeoSource
2000
unit
equipped
with a
double-wall
vented
desuperheater can
provide
supplemental heating
of
a
home's
domestic
hot
water
by
stripping
some energy
from the
superheated
gas
leaving
the
compressor
and
transferring
it
to
a
hot
water tank.
A
desuperheater
pump,
manufactured
into the unit,
circulates
water
from
the
domestic
hot
water tank,
heats
it
using a double
walled
water-to-refrigerant
heat exchanger, and
returns
it
to
the
tank.
elmportant
-
GW981
and
GW1201 do not include
an
internal
desuperheater
pump. Provide an external
pump
suitable
for
potable
water,
such
as
Grundfos UP15-42.
The GW3800
does
not
have
a
desuperheater.
The
desuperheater
only provides
supplemental
heating
when the
compressor
is
already
running
to
heat
or
cool
the
conditioned
space. Because
the
desuperheater
is
using
some energy
from
the
heat
pump
to
heat
water, the
heat
pump's capacity
in
the
winter
is
about
l07o
less
than
a
unit
without
a
desuperheater.
During extremely
cold
weather,
or
if
the
heat
pump cannot keep
up
with
heating
the
space,
the
desuperheater
fuse may be removed
to
get
full
heating capacity out
of
the
unit.
9w.q.RNn{c
-
Do
nor remove the desuperheater's high
temperature
cutout switch,
or
tank
temperatures could
become dangerously
high. The
desuperheater's
high
temperature
cutout switch
is
located
on the return
line
from the water
heater
and
is
wired
h
series
with
the
desuperheater
pump
to
disable
it
from
circulating
at
entering water
temperature
above 140"F.
If
the
tank
temperatures
become uncomfortably
hot,
move
this
switch
to the
leaving water
line, which
will
reduce
the
tank maximum temperatures
10"F
to
l5oF.
13
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