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The Quality Leader in Conditioning Air
Residential Split - 60Hz R22 &R410A
Rev.: 5 June, 2008
www.heatcontoller.com
Unit Starting and Operating Conditions
Operating Limits
Environment – “Indoor” compressor section is designed for
indoor installation only. Never install “indoor” compressor
section in areas subject to freezing or where humidity levels
could cause cabinet condensation (such as unconditioned
spaces subject to 100% outside air). “Outdoor” unit is designed
for conditions where ambient air is below freezing (see Table
11).
Power Supply – A voltage variation of +/– 10% of nameplate
utilization voltage is acceptable.
Starting Conditions
Consult Table 11 for the particular model. Starting conditions
vary depending upon model and are based upon the
following notes:
Notes:
1. Conditions in Table 11 are not normal or continuous
operating conditions. Minimum/maximum limits are start-
up conditions to bring the building space up to occupancy
temperatures. Units are not designed to operate under
these conditions on a regular basis.
2. Voltage utilization range complies with ARI
Standard 110.
Determination of operating limits is dependent primarily upon
three factors: 1) return air temperature. 2) water temperature,
and 3) ambient temperature. When any one of these factors
is at minimum or maximum levels, the other two factors
should be at normal levels to insure proper unit operation.
Extreme variations in temperature and humidity and/or
corrosive water or air will adversely affect unit performance,
reliability, and service life.
Table 11: Unit Operation
Operating Limits
HTS/HSS PDW
Cooling Heating Cooling Heating
Air Limits
Min. ambient air, DB 45°F [7°C] 39°F [4°C] -10°F [-23°C] -10°F [-23°C]
Rated ambient air, DB 80.6°F [27°C] 68°F [20°C] 80.6°F [27°C] 68°F [20°C]
Max. ambient air, DB 110°F [43°C] 85°F [29°C] 110°F [43°C] 85°F [29°C]
Min. entering air, DB/WB 50°F [10°C] 40°F [4.5°C] 50°F [10°C] 50°F [10°C]
Rated entering air, DB/WB 80.6/66.2°F [27/19°C] 68°F [20°C] 80.6/66.2°F [27/19°C] 68°F [20°C]
Max. entering air, DB/WB 110/83°F [43/28°C] 80°F [27°C] 110/83°F [43/28°C] 80°F [27°C]
Water Limits
Min. entering water 30°F [-1°C] 20°F [-6.7°C] 30°F [-1°C] 20°F [-6.7°C]
Normal entering water 50-110°F [10-43°C] 30-70°F [-1 to 21°C] 50-110°F [10-43°C] 30-70°F [-1 to 21°C]
Max. entering water 120°F [49°C] 90°F [32°C] 120°F [49°C] 90°F [32°C]
Normal water flow
1.5 to 3.0 gpm/ton 1.5 to 3.0 gpm/ton
2.0 to 3.9 l/m per kW 2.0 to 3.9 l/m per kW