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REYQ-TATJA / TAYDA
-Confirm capacity correction factor by piping length and level difference (K1)
(K1) = 0.924
-Calculate capacity correction factor by piping heat loss (K2)
(K2) = 1 + (heat loss factor per feet of piping × (equivalent piping length – 25 ft.)) / 100
In cooling mode, heat loss factor per feet at 93°F is calculated as below.
(R) Heat loss factor per feet = 0.072
Using "Equivalent piping length = 200 ft." and "Heat loss factor per feet = 0.0922",
(K2) = 1 + (0.0922 × (200 – 25)) / 100 = 1.161
Cooling
41°F
Heat loss factor per feet
of piping (%)
0.000
Heating
5°F
Heat loss factor per feet
of piping (%)
0.328
-Calculate the corrected capacity of REYQ192TATJA / TAYDA(C) by using (K1) and (K2).
Corrected capacity of REYQ192TATJA / TAYDA (C) = (B) × (K1) / (K2) (add defrost correction factor for heating capacity)
Therefore (C) = 201.8 × 0.924 / 1.161 = 160.6 MBH
If the corrected capacity (C) is the same or greater than the required total heat load (A), selection is complete.
If (C) < (A), return to Procedure [3]–2 and provisionally select a larger outdoor unit.
In this example, 160.6 MBH (C) < 173.2 MBH (A), so need to select a larger outdoor unit.
The capacity of REYQ216TATJA / TAYDA at the same condition is 177.6 MBH, which is more than the heat load (A):
173.2 MBH.
So the selection is complete.
0.924
+ (0.098
– 0.072
) × (93
*2
*1
*2
Ambient temperature
50°F
59°F
68°F
0.000
0.013
0.030
Ambient temperature
14°F
23°F
32°F
0.305
0.282
0.256
– 86
) / (95
– 86
) = 0.0922
*3
*4
*5
*4
77°F
86°F
93°F
*4
*3
0.046
0.072
(R)
*2
41°F
50°F
59°F
0.233
0.210
0.187
76
EDUS371704C-D
95°F
104°F
*5
0.098
0.125
*1
68°F
0.161
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