Delivered Void Of Charge - Lennox Elite XP13-030-230 Installation Instructions Manual

Service and Weigh In Refrigerant for Outdoor Units Delivered Void of Charge
The following procedures are only required if it has been determine that the new outdoor unit is void of charge. Skip to the
next section if refrigerant charge is present.
LEAK CHECK, REPAIR AND EVACUATE
If the outdoor unit is void of refrigerant, clean the system
using the procedure described below.
1. Leak check system using procedures provided on
page 17. Repair any leaks discovered during leak test.
2. Evacuate the system using procedure provided in
figure 13.
3. Use nitrogen to break the vacuum and install a new
filter drier in the system.
4. Evacuate the system again using procedure in figure
13.
CONNECT MANIFOLD GAUGE SET AND WEIGH−IN
CHARGE
After the evacuation procedure, reconnect the manifold
gauge set as illustrated in figure 17.
NOTE − Temperature sensor illustrated in figure 17 is not
required for initial system weigh in charging.
NOTE Refrigerant
tank should be turned
right−side−up to deliver
vapor during charge
optimizing procedure.
HFC−410A
REFRIGERANT
TANK
CHARGE IN
LIQUID PHASE
DIGITAL SCALE
TO LIQUID
LINE SERVICE
A Close manifold gauge set valves and connect the center hose to a cylinder of HFC−410A. Set
for liquid phase charging.
B Connect the manifold gauge set's low pressure side to the true suction port.
C Connect the manifold gauge set's high pressure side to the liquid line service port.
D Position temperature sensor on liquid line near liquid line service port (use only for subcooling
method).
Figure 17. Typical Gauge Set Connections for Initial Weight−in Charge or Optimizing System Charge
506728−01
MANIFOLD GAUGE SET
LOW
HIGH
A
C
VALVE
1. Close manifold gauge set valves and connect the
gauge set as exampled in figure 17.
2. Check that fan rotates freely.
3. Inspect all factory− and field−installed wiring for loose
connections.
4. Open the high side manifold gauge valve and weigh in
liquid refrigerant. Use figure 18 to calculate the correct
weigh−in charge.
5. Close manifold gauge valves.
6. Monitor the system to determine the amount of
moisture remaining in the oil. It may be necessary to
replace the bi−flow filter drier several times to achieve
the required dryness level. If system dryness is not
verified, the compressor will fail in the future.
7. Continue to Optimizing System Refrigerant Charge
on page 24 to optimize the system charge using
subcooling method.
GAUGE SET
CONNECTIONS FOR OPTIMIZING SYSTEM CHARGE
B
TRUE SUCTION PORT
CONNECTION
Page 22
TEMPERATURE
SENSOR
(LIQUID LINE)
NOTE For simplify the illustration,
the line set is not shown connected to
service valves.
D