38
G e o t h e r m a l H e a t P u m p S y s t e m s
P R E L I M I N A RY
Tranquility
®
30 Digital (TE) Series IOM - 60Hz HFC-410A
R e v. : 3 A u g . , 2 0 1 2 B
Unit Commissioning And Operating Conditions
Table 10a: Operating Limits
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 unit data plate.
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 10a for operating limits.
Commissioning Conditions
Consult Table 10b for commissioning conditions. Starting conditions vary depending upon model and are based upon the
following notes:
Notes:
1. Conditions in Table 10b 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.
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]
Unit
Commissioning Limits
Normal Water Flow
1.5 to 3.0 gpm / ton
[1.6 to 3.2 l/m per kW]
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]
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]
Unit
Operating Limits
Normal Water Flow
1.5 to 3.0 gpm / ton
[1.6 to 3.2 l/m per kW]
70/50ºF Reheat
Table 10b: Commissioning Limits
