Installation Manual

5
REFRIGERANT UNDER PRESSURE!
F AILURE TO FOLLOW PROPER PROCEDURES MAY CAUSE PROPERTY
DAMAGE , PERSONAL INJURY OR DEATH .
WARNING
NOTE: Scroll compressors should never be used to evacuate
or pump down a heat pump or air conditioning system.
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
suction 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 startup.
• 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
ACUUM
IN
MICRONS
CONDENSIBLES OR SMALL
LEAK PRESENT
NO LEAKS
NO CONDENSIBLES
electrIcal connectIonS
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
The condensing unit rating plate lists pertinent electrical
data necessary for proper electrical service and overcurrent
protection. 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 correct 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
installation instructions supplied with the indoor furnace/air
handler for specic wiring connections and indoor unit con-
guration. Likewise, consult the instructions packaged with
the thermostat for mounting and location information.
overcurrent protectIon
The following overcurrent protection devices are approved
for use.
• Time delay fuses
• HACR type circuit breakers
These devices have sufcient time delay to permit the mo-
tor-compressor to start and accelerate its load.
hIgh voltage connectIonS
Route power supply and ground wires through the high volt-
age port and terminate in accordance with the wiring diagram
provided inside the control panel cover.
low voltage connectIonS
This heat pump is equipped with a factory-installed transformer
to power the outdoor controls when installed as part of a fully
communicating HVAC system utilizing a ComfortBridge™
compatible indoor unit. In this conguration, only two low
voltage control wires are required between the outdoor unit
and indoor unit.
The unit also has legacy 24 VAC inputs and outputs to support
non-communicating systems. When this conguration is used,
the transformer in the outdoor unit must be disconnected from
the low voltage and line voltage connections. The transformer
connecting wires can then be discarded. Route control wires
through the low voltage port and terminate in accordance with
the wiring diagram provided inside the control panel cover.