Heat Controller HSS Unit Starting and Operating Conditions, Operating Limits, Starting Conditions

T h e Q u a l i t y L e a d e r i n C o n d i t i o n i n g A i r

R e s i d e n t i a l S p l i t - 6 0 H z R 2 2 & R 4 1 0 A

R e v. : 5 J u n e , 2 0 0 8

Unit Starting and Operating Conditions

Operating Limits	2. Voltage utilization range complies with ARI
Environment – “Indoor” compressor section is designed for	Standard 110.
indoor installation only. Never install “indoor” compressor
section in areas subject to freezing or where humidity levels	Determination of operating limits is dependent primarily upon
could cause cabinet condensation (such as unconditioned	three factors: 1) return air temperature. 2) water temperature,
spaces subject to 100% outside air). “Outdoor” unit is designed	and 3) ambient temperature. When any one of these factors
for conditions where ambient air is below freezing (see Table	is at minimum or maximum levels, the other two factors
11).	should be at normal levels to insure proper unit operation.
Power Supply – A voltage variation of +/– 10% of nameplate
utilization voltage is acceptable.	Extreme variations in temperature and humidity and/or
Starting Conditions	corrosive water or air will adversely affect unit performance,
	reliability, and service life.
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.

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

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