AHRI OM 210, Operation Manual

Page: 30 / 82

USE OM
– JANUARY 2017
22
APPENDIX B: CONDENSER CURVE INFORMATION
Purpose
This appendix shall:

Characterize the refrigeration effect (capacity) and power of the Highest Sales Volume Tested
Combination (HSVTC) Outdoor Unit independent of the Indoor Unit and its associated power;

Provide a standardized, general equation form to characterize Outdoor Unit performance and
power; and

Provide a method of identifying the equation coefficients required for the capacity and power
equations.
Scope
The methods outlined herein are applicable to:

HSVTC Outdoor Units that are used for cooling only applications;

HSVTC heat pump Outdoor Units, cooling only performance and power; and

AHRI/DOE A, B, C, D, F, and H test conditions as defined in AHRI Standard 210/240.
Definitions

Condensing Unit
– Consists of the Outdoor Unit and all interconnecting lines, liquid and suction,
used to connect the outdoor refrigeration system to the Indoor Unit.

Condenser performance is characterized by the general linear equation:
Gross Capacity or Power = m · (Evaporator Saturation Temperature) + b
Where;
m = slope
b = intercept

Condenser power
– power, watts, associated with the Outdoor Unit only; no indoor power is to be
included.

Condenser capacity
– total capacity, Btu/h, with no indoor power.

Evaporator Saturation Temperature
– the refrigerant saturation temperature based on the outlet
refrigerant pressure of the evaporator.

HSVTC
– Highest sales volume tested combination.

Liquid temperature
– the mean of the actual liquid temperature, °F, measured at the inlet to the
evaporator flow control during HSVTC tests.
Requirements
The following information is required for AHRI submittal of each HSVTC Outdoor Unit and heat pump:
Table B1: AHRI Submittal Requirements for High or Single Stage
Item Definition
m1 Slope of capacity equation, A-test
m2 Slope of power equation, A-test
m3 Slope of capacity equation, B-test
m4 Slope of power equation, B-test
b1 Intercept of capacity equation, A-test
b2 Intercept of power equation, A-test
b3 Intercept of capacity equation, B-test
b4 Intercept of power equation, B-test
TL A Liquid temperature entering flow control, A-test