USE OM - JANUARY 2017
43
2
Calculate Face Area Ratio SEER Effect:
= (Face Area Ratio
– 1) / 10
[10% Face Area = 1% SEER]
Determine Flow Control Difference SEER Effect from chart
Calculate Total SEER effect:
=Face Area Ratio SEER Fin Per Inch Difference
SEER Flow Control Difference SEER Effect
ICM SEER difference
>=97%
Rating allowed
N
Y
Calculate Fin Per Inch difference:
=ICM EvapFinPerInch - Systems EvapFinPerInch
Calculate Fin Per Inch difference SEER Effect:
=Fin Per Inch Difference / 200
[2 FPI = 1% SEER]
Calculate Flow Control Difference:
=ICM Flow Control Value - Systems Flow Control Value
Calculate SEER difference:
= System SEER (1 + Total SEER effect) / ICM Rated SEER
Rating Validated by
AHRI ARM Software
>=94%
Y
N
Rating allowed
ITS Lab test data >=95% before
rating is allowed
Flow Control Type
Accessory Value
Non-Bleed TXV
TDR or LLS
0.45
Bleed TXV
TDR or LLS
0.35
Non-Bleed TXV
0.30
Bleed TXV
0.20
Capillary Tube
TDR or LLS
0.15
Orifice
TDR or LLS
0.15
Capillary Tube
0.00
Orifice
0.00
Flow Control Difference SEER Effect
-0.45
-3.12%
-0.40
-2.78%
-0.35
-2.43%
-0.30
-2.08%
-0.25
-1.73%
-0.20
-1.39%
-0.15
-1.04%
-0.10
-0.69%
-0.05
-0.35%
0.00
0.00%
0.05
0.35%
0.10
0.69%
0.15
1.04%
0.20
1.39%
0.25
1.73%
0.30
2.08%
0.35
2.43%
0.40
2.78%
0.45
3.12%
Figure G3: Part 3 of the ORNL Flowchart
