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Operating Limits
Extended Range
Standard Units
Units
Cooling Heating Cooling Heating
Min. Ambient Air 50˚F/10˚C 50˚F/10˚C 40˚F/5˚C 40˚F/5˚C
Normal Ambient Air 80˚F/27˚C 70˚F/21˚C 80˚F/27˚C 70˚F/21˚C
Max. Ambient Air 100˚F/38˚C 85˚F/29˚C 100˚F/38˚C 85˚F/29˚C
Min. Ent. Air ➀ ➁ 50˚F/10˚C 50˚F/10˚C 50˚F/10˚C 40˚F/5˚C
Normal Ent. Air, 80/67˚F 70˚F 80/67˚F 70˚F
dw/wb 27/19˚C 21˚C 27/19˚C 21˚C
Max. Ent. Air 100/83˚F 80˚F 100/83˚F 80˚C
db/wb ➀ ➁ 38/28˚C 27˚C 38/28˚C 27˚C
➀ At ARI flow rate.
➁
Maximum and minimum values may not be combined. If one
value is at maximum or minimum, the other two conditions
may not exceed the normal condition for standard units.
Extended range units may combine any two maximum or
minimum conditions, but not more than two, with all other
conditions being normal conditions.
This equipment is designed for indoor installation only.
Sheltered locations such as attics, garages, etc., generally
will not provide sufficient protection against extremes in
Environment
Standard units
Units are designed to start and operate in an ambient of
40°F (5°C), with entering air at 40°F (5°C), with entering
water at 70°F (21°C), with both air and water flow rates
used in the ARI Standard 320-86 rating test, for initial start-
up in winter.
Note: This is not a normal or continuous operating con-
dition. It is assumed that such a start-up is for the purpose
of bringing the building space up to occupancy tempera-
ture.
Extended range units
Extended range heat pump conditioners are designed to
start and operate in an ambient of 40°F (5°C), with entering
air at 40°F (5°C), with entering water at 40°F (5°C), with both
air and water at flow rates used in the ARI Standard 320-86
rating test, for initial start-up in winter.
Note: This is not a normal or continuous operating con-
dition. It is assumed that such a start-up is for the purpose
of bringing the building space up to occupancy tempera-
ture.
temperature and/or humidity, and equipment performance,
reliability, and service life may be adversely affected.
Air and water limits
Water enthalpy
Extended Range
Standard Units
Units
Cooling Heating Cooling Heating
Min. Ent. Water ➀ ➁ 55°F/13°C 55°F/13°C 40°F/5°C 40°F/5°C
Normal Ent. Water 85°F/29˚C 70˚F/21°C 85°F/29˚C 70˚F/21°C
Max. Ent. Air ➀ ➁ 110°F/43˚C 90°F/32°C 110°F/43˚C 90°F/32°C
Additional Information For Initial Start-up Only
Operating voltages
115/60/1 . . . . . . . . . . . . . . . 104 volts min.; 127 volts max.
208-230/60/1 . . . . . . . . . . . 197 volts min.; 253 volts max.
265/60/1 . . . . . . . . . . . . . . . 238 volts min.; 292 volts max.
230/50/1 . . . . . . . . . . . . . . . 197 volts min.; 253 volts max.
460/60/3 . . . . . . . . . . . . . . . 414 volts min.; 506 volts max.
380/50/3 . . . . . . . . . . . . . . . 342 volts min.; 418 volts max.
575/60/3 . . . . . . . . . . . . . . . 515 volts min.; 632 volts max.
Note: Voltages listed are to show voltage range. However,
units operating with overvoltage and undervoltage for
extended periods of time will experience premature com-
ponent failure. Three phase system unbalance should not
exceed 2%.
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