capacities less than 39.5 kW (135,000 Btuh) will be
rated in accordance with ARI 210/240.
Air-cooled, water-cooled, and evaporatively-cooled
air-conditioning and heat pump units with capacities
greater than or equal to 39.5 kW (135,000 Btuh) will
be rated in accordance with ARI 340/360.
Air-cooled heat pump units with capacities less than
39.5 kW (135,000 Btuh) will be rated in accordance
with ARI 210/240.
Water-cooled heat pumps used in closed water loop
systems (water-source systems) will be rated in
accordance with ARI 320.
Water-cooled heat pumps used in open ground water
loop systems (groundwater-source systems) will be
rated in accordance with ARI 325. Delete the last 2
sentences if an open-loop type unit is not specified.
Specify a sound rating of 8.4 bels for outdoor units
with capacities below 11.1 kW (38,000 Btuh).
Specify a sound rating of 8.6 bels for outdoor units
with capacities between 11.1 kW (38,000 Btuh) and 19
kW (65,000 Btuh). Specify a sound rating of 8.8
bels for outdoor units with capacities greater than
19 kW (65,000 Btuh). Specify ARI 270 for sound
ratings for outdoor units with capacities less than
39.5 kW (135,000 Btuh), otherwise specify ARI 370.
Include the last sentence only if a water-cooled
unit is specified and the supply water temperature
is capable of falling below 18 degrees C (65 degrees
F) in any mode of heat pump operation.
At a minimum, efficiencies for packaged systems will
be in accordance with paragraph "Equipment
Efficiency". Package systems are typically
available in 2 different efficiency ranges;
conventional efficiency and high efficiency.
Conventional efficiency units typically have an EER
value between 8.5 and 9.5 depending upon the size of
the unit. High efficiency units typically have an
EER value between 9.5 and 13.0. The efficiency to
specify for a packaged system will be based upon an
economic comparison. Coordinate the efficiency
specified with manufacturers.
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Unit shall be an [air-cooled] [water-cooled] [evaporatively-cooled] factory
assembled, [weatherproof] [indoor] packaged unit as indicated. Unit shall
be the [air-conditioning] [heat pump] type conforming to applicable
Underwriters Laboratories (UL) standards including UL 1995. Unit shall be
rated in accordance with [ARI 210/240] [ARI 340/360] [ARI 320] [ARI 325].
Unit shall be provided with equipment as specified in paragraph "Unitary
Equipment Components". Evaporator or supply fans shall be double-width,
double inlet, forward curved, backward inclined, or airfoil blade,
centrifugal scroll type. Motors shall have [open] [dripproof] [totally
SECTION 15700A
Page 17
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