Electrical Connections - Daikin RR20AVAK9 Installation & Service Reference

Prolonged 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.
NOTE: Scroll compressors should never be used to evacuate or
pump down a heat pump or air conditioning system.
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. Typi-
cally 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 be-
low 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 re-
peat evacuation.
• If pressure rises above 2000 microns, a leak is present.
Check for leaks as previously indicated and repair as nec-
essary then repeat evacuation.

Electrical Connections

The condensing 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.
Likewise, consult the instructions packaged with the thermo-
stat for mounting and location information.
CAUTION
138 K a P
To avoid the risk of fire or explosion, never use oxygen, high
pressure air or flammable gases for leak testing of a refrigeration
system.
HIGH VOLTAGE!
Disconnect ALL power before servicing.
Multiple power sources may be present. Failure to do
so may cause property damage, personal injury or
death due to electric shock. Wiring must conform with
NEC or CEC and all local codes. Undersized wires could cause
poor equipment performance, equipment damage or fire.
To avoid the risk of fire or equipment damage, use copper
conductors.
7
NO LEAKS
NO CONDENSIBLES
Figure 5