6
U
SE
REFRIGERANT
CERTIFIED
TO
AHRI
STANDARDS
. U
SED
REFRIGERANT
MAY
CAUSE
COMPRESSOR
DAMAGE
,
AND
THE
WARRANTY
. M
OST
PORTABLE
MACHINES
CANNOT
CLEAN
USED
REFRIGERANT
TO
MEET
AHRI
STANDARDS
.
IS
NOT
COVERED
UNDER
CAUTION
S
TART
-
UP
P
ROCEDURE
D
ETAIL
Liquid and gas valves on heat pump unit are closed to contain the
charge within the unit. The unit is shipped with the valve stems
closed and caps installed.
Do not open valves until the indoor coil
and line set is evacuated.
P
ROLONGED
OPERATION
AT
SUCTION
PRESSURES
LESS
THAN
20
PSIG
FOR
MORE
THAN
5
SECONDS
WILL
RESULT
IN
OVERHEATING
OF
THE
SCROLLS
AND
PERMANENT
DAMAGE
TO
THE
SCROLL
TIPS
,
DRIVE
BEARINGS
AND
INTERNAL
SEAL
.
CAUTION
1. Connect the vacuum pump with 250 micron capability to
the service valves.
2. Evacuate the system to 250 microns or less using gas
and
liquid service valves. Using both valves is necessary as
some compressors create a mechanical seal separating the
sides of the system.
3. Close pump valve and hold vacuum for 10 minutes.
Typically pressure will rise during this period.
•
If the pressure rises to 1000 microns or less and remains
steady the system is considered leak-free; proceed to
start-up.
•
If pressure rises above 1000 microns but holds steady
below 2000 microns, moisture and/or noncondensibles
may be present or the system may have a small leak.
Return to step 2: If the same result is encountered check
for leaks as previously indicated and repair as necessary
then repeat evacuation.
•
If pressure rises above 2000 microns, a leak is present.
Check for leaks as previously indicated and repair as
necessary then repeat evacuation.
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0 1 2 3 4 5 6 7 8 9
10
LEAK(S)
PRESENT
MINUTES
V
AC
U
U
M
IN
MI
C
R
O
N
S
CONDENSIBLES OR SMALL
LEAK PRESENT
NO LEAKS
NO CONDENSIBLES
E
LECTRICAL
C
ONNECTIONS
HIGH VOLTAGE!
D
ISCONNECT
ALL
POWER
BEFORE
SERVICING
.
M
ULTIPLE
POWER
SOURCES
MAY
BE
PRESENT
. F
AILURE
TO
DO
SO
MAY
CAUSE
PROPERTY
DAMAGE
,
PERSONAL
INJURY
OR
DEATH
DUE
TO
ELECTRIC
SHOCK
. W
IRING
MUST
CONFORM
WITH
NEC
OR
CEC
AND
ALL
LOCAL
CODES
. U
NDERSIZED
WIRES
COULD
CAUSE
POOR
EQUIPMENT
PERFORMANCE
,
EQUIPMENT
DAMAGE
OR
FIRE
.
WARNING
T
O
AVOID
THE
RISK
OF
FIRE
OR
EQUIPMENT
DAMAGE
,
USE
COPPER
CONDUCTORS
.
WARNING
GROUNDING REQUIRED!
A
LWAYS
INSPECT
AND
USE
PROPER
SERVICE
TOOLS
. L
ACK
OF
INSPECTION
OR
IMPROPER
TOOLS
MAY
CAUSE
EQUIPMENT
DAMAGE
OR
PERSONAL
INJURY
. A
LL
DISCONNECTED
GROUNDING
DEVICES
MUST
BE
RECONNECTED
BEFORE
INSTALLING
OR
SERVICING
. M
ULTIPLE
COMPONENTS
OF
THIS
UNIT
MAY
CONDUCT
ELECTRICAL
CURRENT
;
THESE
ARE
GROUNDED
. I
F
SERVICING
THE
UNIT
,
ANY
DISCONNECTION
OF
GROUNDING
WIRES
,
SCREWS
,
STRAPS
,
CLIPS
,
NUTS
OR
WASHERS
USED
TO
COMPLETE
THE
GROUND
MUST
BE
RETURNED
TO
THEIR
ORIGINAL
POSITION
AND
PROPERLY
FASTENED
.
CAUTION
The heat pump unit rating plate lists pertinent electrical data
necessary for proper electrical service and overcurrent protec-
tion. Wires should be sized to limit voltage drop to 2% (max.)
from the main breaker or fuse panel to the condensing unit.
Consult the NEC, CEC, and all local codes to determine the cor-
rect wire gauge and length.
Local codes often require a disconnect switch located near the
unit; do not install the switch on the unit. Refer to the installa-
tion instructions supplied with the indoor furnace/air handler
for specific wiring connections and indoor unit configuration.
O
VERCURRENT
P
ROTECTION
The inverter control system software provides sufficient time
delay to protect from overcurrent conditions and permit the com-
pressor and fan motors to adjust their rotational speed.
H
IGH
V
OLTAGE
C
ONNECTIONS
Route power supply and ground wires through the high voltage
port and terminate in accordance with the wiring diagram pro-
vided inside the control panel cover.
L
OW
V
OLTAGE
C
ONNECTIONS
The unit is designed to work as part of a fully communicating
HVAC system, utilizing a ComfortNet™ CTK04 thermostat,
ComfortNet compatible indoor unit, and up to four wires. Route
control wires through the low voltage port and terminate in ac-
cordance with the wiring diagram provided inside the control
panel cover.
