Table 7. Subcooling Values For Fixed Orifice Systems (HFC-410A)*
XC13 Outdoor Condensing Units Models
°F (°C)** -018 -024 -030 -036 -037 -042 -048 -060
65 (18) 8 (4.4) 14 (7.7) 10 (5.6) 10 (5.6) -- 13 (7.2) 15 (8.3) 11 (6)
70 (21) 4 (2.2) 13 (7.2) 9 (5) 8 (4.4) -- 12 (6.7) 14 (7.7) 10 (5.6)
75 (24) 3 (1.7) 12 (6.7) 8 (4.4) 7 (4) -- 11 (6) 13 (7.2) 10 (5.6)
80 (27) 2 (1) 11 (6) 7 (4) 7 (4) -- 11 (6) 12 (6.7) 10 (5.6)
85 (29) 2 (1) 11 (6) 6 (3.3) 6 (3.3) -- 10 (5.6) 11 (6) 9 (5)
90 (32) 2 (1) 9 (5) 5 (2.7) 5 (2.7) -- 9 (5) 10 (5.6) 9 (5)
95 (35) 2 (1) 9 (5) 4 (2.2) 4 (2.2) -- 8 (4.4) 9 (5) 8 (4.4)
100 (38) 1 (0.5) 7 (4) 4 (2.2) 4 (2.2) -- 7 (4) 9 (5) 8 (4.4)
105 (41) 1 (0.5) 6 (3.3) 3 (1.7) 3 (1.7) -- 7 (4) 8 (4.4) 7 (4)
110 (43) 1 (0.5) 6 (3.3) 2 (1) 2 (1) -- 6 (3.3) 7 (4) 7 (4)
115 (45) 1 (0.5) 5 (2.7) 2 (1) 2 (1) -- 5 (2.7) 6 (3.3) 6 (3.3)
XP13 Outdoor Heat Pump Units Models
°F (°C)** -018 -024 -030 -036 -037 -042 -048 -060
65 (18) -- 7 (4) 13 (7.2) 15 (8.3) 8 (4.4) 13 (7.2) 10 (5.6) 10 (5.6)
75 (24) -- 5 (2.7) 10 (5.6) 13 (7.2) 7 (4) 10 (5.6) 9 (5) 9 (5)
85 (29) -- 5 (2.7) 8 (4.4) 11 (6) 6 (3.3) 8 (4.4) 8 (4.4) 8 (4.4)
95 (35) -- 4 (2.2) 7 (4) 9 (5) 6 (3.3) 7 (4) 8 (4.4) 6 (3.3)
105 (41) -- 3 (1.7) 6 (3.3) 7 (4) 5 (2.7) 6 (3.3) 7 (4) 5 (2.7)
115 (45) -- 2 (1) 3 (1.7) 5 (2.7) 4 (2.2) 3 (1.7) 5 (2.7) 4 (2.2)
* Liquid Subcooling [ + 1<_F (.6<_C)]
** Outdoor Ambient Temperature.
CHARGE USING SUPERHEAT METHOD --(Fixed Orifice Systems) - Outdoor Temp. >40°F (4°C)
This charging procedure should not be used if ambient temperatures are below 40°F (4°C), For best results, indoor
temperature should be 70°F (21°C) to 80°F (26°C), Measure the wet bulb temperature of indoor return air and dry bulb
temperature of the outdoor entering air, Use table 8 to find the superheat value at those conditions,
Table 8. Superheat Values For Fixed Orifice Systems
*D_ bulb Wet bulb (air entering indoor coil)
ou_oor 50 52 54 56 58 60 62 64 66 68 70 72 74 76
40 15 18 20 23 26 29 32 34 38 41 43 46 48 51
45 13 16 18 21 24 27 30 33 36 39 41 44 46 49
50 11 14 16 19 22 25 28 31 34 37 39 42 44 47
55 9 12 14 17 20 23 27 30 33 36 38 40 42 44
60 7 10 12 15 18 21 24 27 30 33 35 38 40 43
65 6 10 13 16 19 21 24 27 30 33 36 38 41
70 7 10 13 16 19 21 24 27 30 33 36 39
75 6 9 12 15 18 21 24 28 31 34 37
80 5 8 12 15 18 21 25 28 31 35
85 8 11 15 19 22 26 30 33
90 5 9 13 16 20 24 27 31
95 6 10 14 18 22 25 29
100 8 12 16 21 24 28
105 5 9 13 17 22 26
110 6 11 15 20 25
115 8 14 18 24
* Dry-bulbtemperature (°F)of outdoor enteringair.
NOTE- Do notattempt to charge system wherea dash appears, system could be overcharged.Superheatis taken at vapor line service port. Vapor
line superheat mumnever be lessthan 5°F at the vapor line service port,
505059M 04/08
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