Tranquility
®
22 (TZ) Series
R e v. : A u g u s t 4 , 2 0 2 1
C l i m a t e M a s t e r Wa t e r-S o u rc e H e a t P u m p s
40
C L I M AT E M A S T E R WAT E R - S O U R C E H E AT P U M P S
Unit Starting 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 ensure 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 8 for
operating limits.
Commissioning Conditions
Consult Table 9 for the particular model. Starting conditions
vary depending upon model and are based upon the
following notes:
Notes:
1. Conditions in Table 9 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 8: Operating Limits
Operating Limits
TZ
Cooling
Heating
Air Limits
Min. ambient air, DB
45°F [7°C]
39°F [4°C]
Rated ambient air, DB
80.6°F [27°C]
68°F [20°C]
Max. ambient air, DB
130°F [54.4°C]
85°F [29°C]
Min. entering air, DB/WB
65/45°F [18/7°C]
50°F [10°C]
Rated entering air, DB/WB 80.6/66.2°F [27/19°C]
68°F [20°C]
Max. entering air, DB/WB
100/75°F [38/24°C]
80°F [27°C]
Water Limits
Min. entering water
*20°F [-6.7°C]
20°F [-6.7°C]
Normal entering water
50-110°F [10-43.3°C] 30-80°F [-1.1 to 26.7°C]
Max. entering water
120°F [48.9°C]
*120°F [48.9°C]
Normal Water Flow
1.5 to 3.0 gpm/ton
[1.6 to 3.2 l/m per kW]
*When unit is equipped with Internal Secondary Pump option (code 7 in position eleven of
the unit model number) the minimum entering water temperature is 30°F [-1.1°C] and the
maximum entering heating water is 90°F [32.2°C].
Table 9: Commissioning Limits
Commissioning Limits
Cooling
Heating
Air Limits
Min. ambient air, DB
45°F [7°C]
39°F [4°C]
Rated ambient air, DB
80.6°F [27°C]
68°F [20°C]
Max. ambient air, DB
130°F [54.4°C]
85°F [29°C]
Min. entering air, DB/WB
60/45°F [16/7°C]
50°F [10°C]
Rated entering air, DB/WB 80.6/66.2°F [27/19°C]
68°F [20°C]
Max. entering air, DB/WB
100/75°F [38/24°C]
80°F [27°C]
Water Limits
Min. entering water
*20°F [-6.7°C]
20°F [-6.7°C]
Normal entering water
50-110°F [10-43.3°C] 30-80°F [-1.1 to 26.7°C]
Max. entering water
120°F [48.9°C]
*120°F [48.9°C]
Normal Water Flow
1.5 to 3.0 gpm/ton
[1.6 to 3.2 l/m per kW]
*When unit is equipped with Internal Secondary Pump option (code 7 in position eleven of
the unit model number) the minimum entering water temperature is 30°F [-1.1°C] and the
maximum entering heating water is 90°F [32.2°C].
