6
When opening valves with retainers, open each valve only until the
top of the stem is 1/8” from the retainer. To avoid loss of refrigerant,
DO NOT apply pressure to the retainer. When opening valves without
a retainer remove service valve cap and insert a hex wrench into
the valve stem and back out the stem by turning the hex wrench
counterclockwise. Open the valve until it contacts the rolled lip of
the valve body.
NOTE:
These are not back-seating valves. It is not necessary to
force the stem tightly against the rolled lip.
After the refrigerant charge has bled into the system, open the liquid
service valve. The service valve cap is the secondary seal for the
valve 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.
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 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.
Use refrigerant certified
standards. Used refrigerant
may cause compressor damage. Most portable machines
cannot clean used refrigerant to meet
tandards.
to AHRI
AHRI s
NOTICE
Operating the compressor with the suction valve closed is not
covered by the warranty and will 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.
55
57
59
61
63
65
67
69
71
10
13
17
20
23
26
29
30
31
8
11
14
16
19
22
26
27
29
5
8
10
13
15
19
23
24
25
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6
9
11
15
20
21
23
---
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7
12
17
18
20
---
---
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8
13
15
16
---
---
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7
10
11
13
---
---
---
---
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7
8
10
---
---
---
---
---
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7
8
---
---
---
---
---
---
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7
---
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---
---
---
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SYSTEM SUPERHEAT (+/- 1°F)
Indoor Wet Bulb Temperature, °F
Outdoor Dry Bulb
Temperature, °F
60
65
70
105
110
115
75
80
85
90
95
100
