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Adequate refrigerant charge for the matching HSVTC
evaporator coil and 15 feet of lineset is supplied with
the condensing unit. If using evaporator coils other than
HSVTC coil, it may be necessary to add or remove
refrigerant to attain proper charge. If line set exceeds 15
feet in length, refrigerant should be added at .6 ounces per
foot of liquid line.
NOTE: Charge should always be checked using
superheat when using a piston and subcooling
when using TXV equipped indoor coil to verify
proper charge.
Break vacuum by fully opening liquid service valve.
After the refrigerant charge has bled into the system,
open the suction service valve. The service valve cap is
the secondary seal for the valves and must be properly
tightened to prevent leaks. Make sure cap is clean and
apply refrigerant oil to threads and sealing surface on
inside of cap. Tighten cap finger-tight and then tighten
additional 1/6 of a turn (1 wrench flat), or to the following
specification, to properly seat the sealing surfaces.
1. 3/8" valve to 5 - 10 in-lbs
2. 5/8" valve to 5 - 20 in-lbs
3. 3/4" valve to 5 - 20 in-lbs
4. 7/8" valve to 5 - 20 in-lbs
Do not introduce liquid refrigerant from the cylinder into
the crankcase of the compressor as this may damage the
compressor.
POSSIBLE REFRIGERANT LEAK
To avoid a possible refrigerant leak, open the
service valves until the top of the stem is 1/8"
from the retainer.
1. Break vacuum by fully opening liquid and suction
base valves.
2. Set thermostat to call for cooling. Check indoor and
outdoor fan operation and allow system to stabilize
for 10 minutes for fixed orifices and 20 minutes for
expansion valves.
Charge Verification
REFRIGERANT UNDER PRESSURE!
• Do not overcharge system with refrigerant.
• Do not operate unit in a vacuum or at negative
pressure.
Failure to follow proper procedures may cause
property damage, personal injury or death.
CAUTION
WARNING
Use refrigerant certified to AHRI standards.
Used refrigerant may cause compressor damage.
Most portable machines cannot clean used
refrigerant to meet AHRI standards.
Violation of EPA regulations may result in fines
or other penalties.
Damage to the unit caused by operating the
compressor with the suction valve closed is
not covered under the warranty and may cause
serious compressor damage.
Final Charge Adjustment
Airflow and Total Static Pressure for the indoor unit should
be verified before attempting to charge system.
1. Total static pressure is .5" WC or less.
2. Airflow is correct for installed unit.
3. Airflow tables are in the installation manual and Spec
Sheet for Indoor Unit.
4. Complete charging information are in Service Manual
RS6200006
NOTE: Superheat adjustments should not be made
until indoor ambient conditions have stabilized.
This could take up to 24 hours depending on
indoor temperature and humidity. Before checking
superheat run the unit in cooling for 10-15 minutes
or until refrigerant pressures stabilize. Use the
following guidelines and methods to check unit
operation and ensure that the refrigerant charge
is within limits.
The outdoor temperature must be 60°F or higher. Set the
room thermostat to COOL, fan switch to AUTO, and set the
temperature control well below room temperature.
Units matched with indoor coils equipped with a non-
adjustable TXV should be charged by Subcooling only.
Superheat on indoor coils with adjustable TXV valves are
factory set and no adjustment is normally required during
startup. Only in unique applications due to refrigerant
line length, differences in height between the indoor
and outdoor unit and refrigerant tubing sizes or poor
performance should Superheat setting require adjustment.
These adjustments should only be performed by
qualified service personnel. For detailed charge and TXV
adjustments refer to the appropriate Service Manual.
7
CAUTION
NOTICE
CAUTION
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