presented in this specification or on the design
drawings. Delete chiller efficiencies in the
specification if efficiencies are shown on the
drawings. If the efficiencies are shown on the
drawings, reference the applicable ARI standard.
The following is a list of terms which are commonly
used in regard to efficiency ratings of equipment
defined within this specification.
COP - Coefficient of Performance (dimensionless)
EER - Energy Efficiency Ratio (Btuh/Watt)
IPLV - Integrated Part Load Value
(dimensionless or kW/ton)
NPLV - Non-Standard Part Load Value
(dimensionless or kW/ton)
Note that the IPLV ratings presented by
manufacturers are based upon standard rating
conditions established by ARI. NPLV ratings on the
other hand are based upon site specific rating
conditions. NPLV ratings should be specified in
most applications. NPLV ratings will be coordinated
with ARI and with the chiller manufacturers.
The following is a list of minimum full load and
part load efficiency ratings to be used to specify
electrically driven, air-cooled and water-cooled
liquid chillers. Minimum efficiency ratings for
absorption chillers are defined under paragraph
ABSORPTION LIQUID CHILLER.
Minimum Efficiencies for Air-Cooled Chillers
Full Load
IPLV
COP (EER)
COP (kW/ton)
Air-Cooled (with Condenser):
527 kW (150 tons) or less =
2.8
(9.5)
3.1
(1.12)
greater than 527 kW (150 tons) =
2.7
(9.2)
2.9
(1.22)
Air-Cooled (Condenserless):
All Capacities =
3.1
(10.6)
3.2
(1.10)
Minimum Efficiencies for Water-Cooled Chillers
Full Load
IPLV
Capacity
COP (EER)
COP (kW/ton)
281 kW (80 tons) or less =
3.9
(13.3)
4.7
(0.75)
greater than 281 kw (80 tons)
or less than or equal to
351 kw (100 tons) =
3.9
(13.3)
5.1
(0.70)
greater than 351 kw (100 tons)
or less than or equal to
702 kw (200 tons) =
4.7
(16.0)
5.4
(0.65)
SECTION 15620A
Page 13
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