Heat Controller HEV/H Unit Commissioning And Operating Conditions, Hev/H Series, Operating Limits

Installation, Operation & Maintenance HEV/H SERIES Heat Controller, Inc.

UNIT COMMISSIONING AND OPERATING CONDITIONS

Operating Limits

Environment – Units are designed for indoor installation only. Never install units in areas subject to freezing or where humidity levels could cause cabinet condensation (such as unconditioned spaces subject to 100% outside air).

Power Supply – Voltage utilization shall comply with AHRI standard 110, voltage range A.

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. Consult Table 9a for operating limits.

Table 9a: Building Operating Limits

Operating Limits	Unit
	Cooling	Heating
Air Limits
Min. ambient air, DB	45ºF [7ºC]	39ºF [4ºC]
Rated ambient air, DB	80.6ºF [27ºC]	68ºF [20ºC]
Max. ambient air, DB	130ºF [54ºC]	85ºF [29ºC]
Min. entering air, DB/WB	65/45ºF [18/7ºC]	50ºF [10ºC]
	70/50ºF Reheat
Rated entering air, DB/WB	80.6/66.2ºF [27/19ºC]	68ºF [20ºC]
Max. entering air, DB/WB	100/75ºF [38/24ºC]	80ºF [27ºC]
Water Limits
Min. entering water	20ºF [-6.7ºC]	20ºF [-6.7ºC]
Normal entering water	50-110ºF [10-43ºC]	30-70ºF [-1 to 21ºC]
Max. entering water	120ºF [49ºC]	120ºF [49ºC]
Normal Water Flow	1.5 to 3.0 gpm / ton
	[1.6 to 3.2 l/m per kW]

Rev.: 4 June, 2012

Commissioning Conditions

Consult Table 9b for commissioning conditions. Starting conditions vary depending upon model and are based upon the following notes:

Notes:

1.Conditions in Table 9b 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 complies with AHRI Standard 110, voltage range B.

Table 9b: Building Commissioning Limits

Commissioning Limits	Unit
	Cooling	Heating
Air Limits
Min. ambient air, DB	45ºF [7ºC]	39ºF [4ºC]
Rated ambient air, DB	80.6ºF [27ºC]	68ºF [20ºC]
Max. ambient air, DB	130ºF [54ºC]	85ºF [29ºC]
Min. entering air, DB/WB	60ºF [16ºC]	40ºF [4.5ºC]
Rated entering air, DB/WB	80.6/66.2ºF [27/19ºC]	68ºF [20ºC]
Max. entering air, DB/WB	110/83ºF [43/28ºC]	80ºF [27ºC]
Water Limits
Min. entering water	20ºF [-6.7ºC]	20ºF [-6.7ºC]
Normal entering water	50-110ºF [10-43ºC]	30-70ºF [-1 to 21ºC]
Max. entering water	120ºF [49ºC]	120ºF [49ºC]
Normal Water Flow	1.5 to 3.0 gpm / ton
	[1.6 to 3.2 l/m per kW]
		Rev.: 4 June, 2012

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