Specifications

14
ClimateMaster Water-Source Heat Pumps
Console (CCE) Series
0.5 to 1.5 Ton Console Units
About ARI/ISO/ASHRAE 13256-1
The performance standard ARI/ASHRAE/ISO 13256-1 became effective January 1, 2000 and replaces ARI Stan dards 320, 325,
and 330. This new standard has three major categories: Water Loop (com pa ra ble to ARI 320), Ground Water (ARI 325), and
Ground Loop (ARI 330). Although these standards are similar there are some differences:
Entering Water Conditions Changes
Entering water temperatures have changed to refl ect the centigrade temperature scale. For instance the water loop heating test
is performed with 68°F (20°C) water instead of 70°F.
Entering Air Condition Changes
Entering air temperatures have changed to refl ect the centigrade temperature scale. For instance the cooling tests are performed
with 80.6°F (27°C) dry bulb and 66.2°F (19°C) wet bulb entering air instead of the traditional 80°F DB and 67°F WB entering
air temperatures. 80/67 and 70 data (as presented in performance data on pages 16-26) may be converted to the new ISO
conditions of 80.6/66.2 and 68 using the entering air correction table on page 14.
Pump Power Correction
Within each model, only one water fl ow rate is specifi ed for all three groups and pumping watts are calculated using the following
formula. This additional power is added onto the existing power consumption.
Pump power correction = (gpm x 0.0631) x (Press Drop x 2990) / 300
Where 'gpm' is waterfl ow in gpm and 'Press Drop' is the pressure drop through the unit heat ex chang er at rated water fl ow in
feet of head.
Fan Power Correction
Fan power is corrected to zero external static pressure using the following equation. The nominal airfl ow is rated at a specifi c
external static pressure. This effectively reduces the power con sump tion of the unit and increases cooling capacity but decreases
heating capacity. These watts are sig nifi cant enough in most cases to increase EER and COP's fairly dramatically over ARI 320,
325, and 330 ratings.
Fan Power Cor rec tion = (cfm x 0.472) x (esp x 249) / 300
Where 'cfm' is airfl ow in cfm and esp is the external static pressure at rated airfl ow in inches of water gauge.
ISO Capacity and Effi ciency Equations
The following equations illustrate cooling calculations:
ISO Cooling Capacity = Cooling Capacity (Btuh) + (Fan Power Correction (Watts) x 3.412)
ISO EER Effi ciency (W/W) = [ISO Cooling Capacity (Btuh) ÷ 3.412] / [Power Input (watts) – Fan Power Correction (watts) + Pump
Power Correction (watt)]
The following equations illustrate heating calculations:
ISO Heating Capacity = Heating Capacity (Btuh) - (Fan Power Correction (Watts) x 3.412)
ISO COP Effi ciency (W/W) = [ISO Heating Capacity (Btuh) ÷ 3.412] / [Power Input (watts) - Fan Power Correction (watts) + Pump
Power Correction (watt)]
ARI 320 ISO WLHP ARI 325 ISO GWHP ARI 330 ISO GLHP
Cooling
Entering Air -DB/WB °F 80/67 80.6/66.2 80/67 80.6/66.2 80/67 80.6/66.2
Entering Water -°F 85 86 50/70 59 77 77
Fluid Flow Rate Note 1 Note 2 Note 2 Note 2 Note 2 Note 2
Heating
Entering Air -°F706870687068
Entering Water -°F 70 68 50/70 50 32 32
Fluid Flow Rate Note 1 Note 2 Note 2 Note 2 Note 2 Note 2
Note 1: Flow rate is set by 10°F rise in standard cooling test.
Note 2: Flow rate is specified by manufacturer.
Rev.: 3/09/01