Unit Commissioning And Operating Conditions; Series - Heat Controller HTV Series Installation, Operation & Maintenance Manual

Installation, Operation & Maintenance

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 – A voltage variation of +/– 10% of nameplate utilization voltage is acceptable.
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 8a for operating limits.
Table 8a: Building Operating Limits
Operating Limits
perating Limits
Cooling
Air Limits
mits
Min. ambient air, DB 45ºF [7ºC]
mbient air, DB 45ºF [7ºC]
Rated ambient air, DB 80.6ºF [27ºC]
ambient air, DB 80.6ºF [27ºC]
Max. ambient air, DB 130ºF [54ºC]
mbient air, DB 1 30ºF [54ºC]
Min. entering air, DB/WB 65/45ºF [18/7ºC]
tering air, DB/WB 60/45ºF [16/7ºC]
70/50ºF Reheat
entering air, DB/WB 80.6/66.2ºF [27/19ºC]
Rated entering air, DB/WB 80.6/66.2ºF [27/19ºC]
ntering air, DB/WB 100/75ºF [38/24ºC]
Max. entering air, DB/WB 100/75ºF [38/24ºC]
Limits
Water Limits
tering water 30ºF [-1ºC]
Min. entering water 20ºF [-6.7ºC]
entering water 50-110ºF [10-43ºC]
Normal entering water 50-110ºF [10-43ºC]
ntering water 120ºF [49ºC]
Max. entering water 120ºF [49ºC]
l Water Flow
Normal Water Flow
Commissioning Conditions
Consult Table 8b for the particular model. Starting conditions vary depending upon model and are based upon the following notes:
Notes:
1. Conditions in Table 8b 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 AHRI Standard 110.
Table 8b: Building Commissioning Limits
Commissioning Limits
Air Limits
Min. ambient air, DB
Rated ambient air, DB 80.6ºF [27ºC]
Max. ambient air, DB
Min. entering air, DB/WB
Rated entering air, DB/WB 80.6/66.2ºF [27/19ºC]
Max. entering air, DB/WB 110/83ºF [43/28ºC]
Water Limits
Min. entering water
Normal entering water 50-110ºF [10-43ºC]
Max. entering water
Normal Water Flow
HTV/HTD/HTH SERIES
HT
TT Unit
Cooling Heating
Heating
39ºF [4ºC]
39ºF [4ºC]
68ºF [20ºC]
68ºF [20ºC]
85ºF [29ºC]
85ºF [29ºC]
50ºF [10ºC]
40ºF [4.4ºC]
68ºF [20ºC]
68ºF [20ºC]
80ºF [27ºC]
80ºF [27ºC]
20ºF [-6.7ºC]
20ºF [-6.7ºC]
30-70ºF [-1 to 21ºC]
30-70ºF [-1 to 21ºC]
90ºF [32ºC]
120ºF [49ºC]
1.5 to 3.0 gpm / ton
1.5 to 3.0 gpm / ton
[1.6 to 3.2 l/m per kW] [1.6 to 3.2 l/m per kW]
Unit HT
Cooling Heating
45ºF [7ºC] 39ºF [4ºC]
68ºF [20ºC]
130ºF [54ºC] 85ºF [29ºC]
60ºF [16ºC] 40ºF [4.5ºC]
68ºF [20ºC]
80ºF [27ºC]
20ºF [-6.7ºC] 20ºF [-6.7ºC]
30-70ºF [-1 to 21ºC]
120ºF [49ºC] 120ºF [49ºC]
1.5 to 3.0 gpm / ton
[1.6 to 3.2 l/m per kW]
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Heat Controller, Inc.