2. Quick Reference Guide For R-410A
• R-410A refrigerant operates at approximately 60% higher pressure (1.6 times) than R-
22. Ensure that servicing equipment is designed to operate with R-410A.
• R-410A refrigerant cylinders are pink.
• R-410A, as with other HFC’s is only compatible with POE oils.
• Vacuum pumps will not remove moisture from POE oil.
• R-410A systems are to be charged with liquid refrigerants. Prior to March 1999, R-
410A refrigerant cylinders had a dip tube. These cylinders should be kept upright for
equipment charging. Post March 1999 cylinders do not have a dip tube and should
be inverted to ensure liquid charging of the equipment.
• Do not install a suction line filter drier in the liquid line.
• A liquid line filter drier is standard on every unit.
• Desiccant (drying agent) must be compatible for POE oils and R-410A
3. Evaporator Coil / TXV
The thermostatic expansion valve is specifically designed to operate with R-410A.
DO
NOT use an R-22 TXV. The existing evaporator must be replaced with the factory
specified TXV evaporator specifically designed for R-410A.
4. Tools Required For Installing & Servicing R-410A Models
Manifold Sets:
-Up to 800 PSIG High side
-Up to 250 PSIG Low Side
-550 PSIG Low Side Retard
Manifold Hoses:
-Service Pressure Rating of 800 PSIG
Recovery Cylinders:
-400 PSIG Pressure Rating
-Dept. of Transportation 4BA400 or BW400
D. COMFORT ALERT™ SYSTEM (2-STAGE MODELS ONLY)
1. Comfort Alert™
The Comfort Alert™ diagnostics module is for troubleshooting air conditioning sys-
tem failures. By monitoring and analyzing data from the compressor and the ther-
mostat demand, the module can accurately detect the cause of electrical and sys-
tem-related failures without any external sensors. A flashing LED indicator commu-
nicates the ALERT code and guides the service technician more quickly and accu-
rately to the root cause of a problem.
POWER LED
(Green): indicates voltage is present at the power connection of the
module.
ALERT LED
(Yellow): communicates an abnormal system condition through a
unique flash code. The ALERT LED will flash a number of times consecutively,
pause and then repeat the process. The number of consecutive flashes, defined
as the Flash Code, correlates to a particular abnormal condition. Detailed
descriptions of specific ALERT Flash Codes are shown in the Comfort Alert
Diagnosis Chart in this manual.
TRIP LED
(Red): indicates there is a demand signal from the thermostat but no
current to the compressor is detected by the module. The TRIP LED typically
indicates the compressor internal overload protector is open or may indicate
missing high voltage supply power to the compressor.
When an abnormal system condition occurs, the Comfort Alert module displays the
appropriate ALERT and/or TRIP LED. The yellow ALERT LED will flash a number
!
CAUTION
R-410A systems operate at higher pressures than R-22 systems. Do not use
R-22 service equipment or components on R-410A equipment.
FIGURE 1
LED DESCRIPTION
7
Summary of Contents for RRNL
Page 39: ...39 FIGURE 31 COOLING ON DELAY PROFILES INTERFACE BOARD SWITCH 7 8 7 8 7 8 7 8...
Page 40: ...40 FIGURE 32 BLOWER OFF DELAY PROFILES INTERFACE BOARD SWITCH 7 8 7 8 7 8 7 8...
Page 80: ...80 FIGURE 35 WIRING DIAGRAM XV WIRING DIAGRAMS...
Page 81: ...81 FIGURE 36 WIRING DIAGRAM...
Page 82: ...82 FIGURE 37 WIRING DIAGRAM 5 TON 4 TON LOW HEAT HIGH COOL 3 TON LOW HEAT MED COOL...
Page 83: ...83 FIGURE 38 WIRING DIAGRAM...
Page 84: ...84 FIGURE 39 WIRING DIAGRAM...
Page 85: ...85 FIGURE 40 WIRING DIAGRAM...
Page 86: ...86 FIGURE 41 WIRING DIAGRAM...
Page 87: ...87 FIGURE 42 WIRING DIAGRAM...
Page 88: ...88 FIGURE 43 WIRING DIAGRAM...
Page 91: ...91 FIGURE 46 SYSTEM CHARGE CHARTS RNL RPL 3 TON COOLING SYSTEM CHARGE CHART REFRIGERANT 410A...
Page 93: ...93 FIGURE 48 SYSTEM CHARGE CHARTS RNL RPL 4 TON COOLING SYSTEM CHARGE CHART REFRIGERANT 410A...
Page 106: ...106 15 SECOND PREPURGE FIGURE 61...
