Service - Econar GeoSource Vara GV Series Installation And Operating Instructions Manual

AII
construction dust
has been cleaned up
and
all
sheet-rocking is completed.
Construction
dust,
especially sheet-rock
dust, can
plug
the air
coil
and
block
airflow.
Make
sure the
filter
is
clean before
starting
the
unit.
Low
voltage wiring of
the thermostat
and any
additional
control wiring
is complete.
Set thermostat
to
the
"OFF" position.
All
high
voltage wiring is correct including
fuses,
breakers, and
wire
sizes.
The heat
pump is located
in
a warm area
(above
45"F).
Starting the
system
with low
ambient
temperature conditions is more
dfficult;
do not leave
until
the
space is
brought
up
to
operating
temperatures.
You may now apply power to
*te
unit.
A 4 minute
35
second delay on
power
up
is programmed into
the heat
pump before
the
compressor
will
operate. During
this
time you
can
verify
airflow
with
the
following
procedure:
-
Place the thermostat
in
the
"FAN
ON"
position.
The
blower
should start
in low
speed. Check airflow
at
the
registers to make
sure that they
are
open
and
that
air
is
being distributed throughout
the
house.
When
airflow
has been checked,
move
the thermostat to the
"FAN AIJTO" position.
The blower
should
stop.
The
following
steps
will
assure that
your
system
is
heating and cooling
properly. After
the
initial power up
period is completed,
the
red
indicator fight
on the internal
conffoller
will
shut
off.
The heat
pump is now ready for
operation.
-
With
the thermostat
in
the
"HEAT"
mode, turn
the
thermostat up to
its
highest temperature setting.
The
blower should
start,
with
the compressor starting
a
few
seconds
later.
The thermostat may
cause its
own
compressor delay
at
this time but
the compressor
will
start
after all
delays.
-
After
running
the
unit for
5
minutes, check
the airside
return and supply temperatures.
An
air temperature
rise
of
20oF
to
30oF is
normal in
the heating mode,
but variations
in
water temperature
and water
flow
rate cafl
cause
variations outside
the
normal
range.
-
Turn
the thermostat to
the'OFF"
mode. The
compressor
will
shut down
in
a
few
seconds,
with
the
blower stopping shortly after.
-
Next,
set
the thermostat to
"COOL"
and turn down to
its lowest setting.
The
blower
will
start
immediately,
and the compressor
will
start after all anti-short cycle
periods.
The anti-short cycle period
is
indicated by
the red
light (labeled ASC)
on
the
controller.
-
After
the
unit
has
run in cooling for
5 minutes, check
the airside return and supply temperatures. An air
temperature drop
of
15oF
to 20"F is normal in
the
cooling
mode
but
airflow
and
humidity
can effect
temperature drop.
-
Set the thermostat
for
normal operation.
-
Instruct
the
owner on correctoperation ofthe
thermostat
and heat
pump.
The
heat
pump is equipped
with
both
high
and
low
pressure switches that
shut the
unit
off if
the
refrigerant
pressure exceeds 400 psi or
goes below
25
psi. Ifthe
system exceeds 400 psi,
the high-pressure switch
will trip
and
lock
the
unit
off
until power
has been disconnected
at
the
circuit
breaker
for
approximately
one
minute.
System
pressures below
25
psi in heating
will
trip
the
low
pressure
switch
and
lock
the
unit out until
the
power
supply
has been
de-energized for
one
minute.
On
a
well
water system, the freeze protection switch
(fi eld installed
part number 75-1028)
will
activate
the
lockout
at 35
psi
in
the
heating
mode
to protect
the water
coil
against freeze
rupture. After
resetting
a
lockout
(by disconnecting
power to
the unit) verify
that both water
flow
and
airflow
are at the
recommended levels before energizing
the
compressor. DO
NOT
reset
a
well
water
system
without
verifying
water
flow.
DO NOT
reset the system more
than one
time.
VRepeated resetting of
the
lockout
can
cause serious damage
ifthe
reason
for lockout
is not
corrected.
I
-
Iflockout
occurs more than
once contact
your
ECONAR
dealer
immediatelv.
I
X.
SERVICE
Regular
service to
a
GeoSource
Vara
heat
pump is very
limited.
The biggest factor is cleaning the air filter.
Other factors could include water
coil
maintenance on
an
open
loop
system
(this maintenance is
discussed
in
section
V).
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
thermostat lockout light.
A.
Filter
The GeoSource Vara
heat
pump requires
an
electrostatic
air
filter (ECONAR
part number 70-1066
for
GY
/
GH/
3
6 I
52,
7
0-
1067 f
or
GH/
59
/
67,
7 0
-
107
7
for
GY159167). This filter
can be cleaned and reused after
it
becomes
dfuty. This
fi1ter should normally
be cleaned
once
a
month during normal usage.
During
extreme
usage or
if
system
performance
has decreased, the
filter
should
be cleaned
more often.
A
dfuty
filter will
increase static pressure to
the system.
This
increase
in
static pressure
will
cause the variabte
speed
blower
to increase
its
speed
in
order to maintain
airflow levels. This
increase
in
speed
will
consume
more
power
than normal, reducing
the
efficiency of
the system.
In
extreme
cases, the
blower will
not
be able
produce
the
correct amount of
airflow.
In
the heating mode, reduced
airflow
may increase the cost of
operation
and,
in
extreme
cases,
cause system lockout
due to high
refrigerant
pressures. In
the
cooling
mode,
reduced
airflow may
reduce
cooling capacity
and,
in
extreme
cases,
ice
the
aircoil
over causing
system
shutdown
due
to
low
refrigerant pressures.
11