40
G e o t h e r m a l H e a t i n g a n d Co o l i n g
Tranquility
®
22 Digital (TZ
)
Series - 60Hz
R e v. : N o v e m b e r 1 8 , 2 0 2 2
Operating & Commissioning 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 AHRI
standard 110.
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.
COMMISSIONING LIMITS
Consult Table 9b for commissioning limits. Starting limits
vary depending upon model and are based upon the
following notes:
NOTES:
1. Limitss 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.
Table 12a: Building Operating Limits
Operating Limits
Unit
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°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°C] 30-70°F [-1 to 21°C]
Max. Entering Water
120°F [49°C]
120°F [49°C]
Normal Water Flow
1.5 to 3.0 gpm/ton
[1.6 to 3.2 l/m per kW]
Commissioning Limits
Unit
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°C]
85°F [29°C]
Min. Entering Air, DB/WB
60°F [16°C]
40°F [4.5°C]
Rated Entering Air, DB/WB
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]
Water Limits
Min. Entering Water
20°F [-6.7°C]
20°F [-6.7°C]
Normal Entering Water
50-110°F [10-43°C] 30-70°F [-1 to 21°C]
Max. Entering Water
120°F [49°C]
120°F [49°C]
Normal Water Flow
1.5 to 3.0 gpm/ton
[1.6 to 3.2 l/m per kW]
Table 12b: Building Commissioning Limits