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C. REFRIGERANT TUBING AND FILTER DRIER
CAUTION: Installation of filter drier in liquid line is
required.
Connect vapor tubing to fittings on outdoor unit vapor service
valve. Connect liquid tubing to filter drier. (See Table 1 and Fig.
9.) Use refrigerant grade tubing. Connect other end of filter drier
to adapter tube on liquid service valve.
D. SWEAT CONNECTION
CAUTION: To avoid valve damage while brazing, ser-
vice valves must be wrapped in a heat-sinking material
such as a wet cloth.
Wrap service valves and filter drier with a wet cloth or heat-
sinking material. Braze connections using either silver bearing or
non-silver bearing brazing material. Do not use soft solder
(materials which melt below 800°F). Consult local code require-
ments.
CAUTION: To prevent damage to unit or service valves,
observe the following:
• Use a brazing shield.
• Wrap service valves with wet cloth or use a heat sink
material.
E. LEAK CHECKING
Leak test all joints in indoor, outdoor, and refrigerant tubing.
F. EVACUATE REFRIGERANT TUBING AND
INDOOR COIL
CAUTION: To avoid compressor damage never use the
system compressor as a vacuum pump.
Refrigerant tubes and indoor coil must be evacuated using the
recommended deep vacuum method of 500 microns. The alternate
triple evacuation method may be used if the procedure outlined
below is followed.
IMPORTANT: Never open system under vacuum to atmosphere
without first breaking it open with nitrogen.
TABLE 2—ACCESSORY USAGE
ACCESSORY
REQUIRED FOR LONG-LINE
APPLICATIONS
*
(OVER 50 FT)
REQUIRED FOR SEA-COAST
APPLICATIONS
*
(WITHIN 2 MILES)
Coastal Filter No Yes
Support Feet No Recommended
Puron® Hard Shutoff TXV Yes† Yes†
Puron® Liquid-Line Solenoid Valve for Heating LHALS0401LLS No
* For tubing line sets between 50 and 175 ft, or more than 20 ft vertical differential refer to Application Guideline and Service Manual for Residential Split-System Air
Conditioners and Heat Pumps using Puron® Refrigerant.
† Required for all applications.
TABLE 3—REQUIRED LIQUID-LINE TEMPERATURE (°F)
LIQUID PRESSURE AT
SERVICE VALVE
(PSIG)
REQUIRED SUBCOOLING TEMPERATURE
(°F)
5 101520
174 56 51 46 41
181 58 53 48 43
188 61 56 51 46
195 63 58 53 48
202 65 60 55 50
209 67 62 57 52
216 69 64 59 54
223 71 66 61 56
230 73 68 63 58
237 75 70 65 60
244 77 72 67 62
251 79 74 69 64
258 81 76 71 66
265 82 77 72 67
272 84 79 74 69
279 86 81 76 71
286 88 86 78 73
293 89 84 79 74
300 91 86 81 76
307 93 88 83 78
314 94 89 84 79
321 96 91 86 81
328 97 92 87 82
335 99 94 89 84
342 100 95 90 85
349 102 97 92 87
356 103 98 93 88
363 105 100 95 90
370 106 101 96 91
377 107 102 97 92
384 109 104 99 94
391 110 105 100 95
398 112 107 102 97
405 113 108 103 98
412 114 109 104 99
419 115 110 105 100
426 117 112 107 102
433 118 113 108 103
440 119 114 109 104
447 120 115 110 105
454 122 117 112 107
461 123 118 113 108
468 124 119 114 109
475 125 120 115 110
482 126 121 116 111
489 127 122 117 112
496 129 124 119 114
503 130 125 120 115
510 131 126 121 116
517 132 127 122 117
524 133 128 123 118
531 134 129 124 119
538 135 130 125 120
545 136 131 126 121
552 137 132 127 122
559 138 133 128 123
566 139 134 129 124
573 140 135 130 125
580 141 136 131 126
587 142 137 132 127
594 143 138 133 128
601 144 139 134 129
608 145 140 135 130
SENSING BULB
STRAP
8 O'CLOCK
4 O'CLOCK
SUCTION
TUBE
A02000
Fig. 7—Positioning of Sensing Bulb
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