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6. Cold Weather Operation
About Cold Weather Operation
The equipment can be operated in sub-freezing ambient conditions provided that the proper measures are taken. Listed below
are general guidelines that should be followed to minimize the possibility of freeze-up. Customers in climates that reach below
freezing temperatures should take necessary precautions to protect the water pipes from freezing. This may include installing a
valve to prevent standing water in the pipes (supplied by a third-party vendor). It may be necessary to heat trace all exposed
make-up water lines if the water cannot be shut off and external piping cannot be drained.
Coil Freeze Protection
For protection against coil freeze-up, recommended process fluid solutions are industrial grade inhibited ethylene glycol or
propylene glycol solution. When the use of glycol is not practical, the system must be designed to meet the minimum
temperature requirements.
Minimum Operation
When a glycol solution is not utilized, operate the system to maintain a minimum heat load on the process fluid so that the
temperature of the fluid leaving the coil is not less than 50°F (10°C). To maintain the leaving fluid temperature at 50°F (10°C)
when the process load is extremely light or off, apply an auxiliary heat load to the process fluid and adjust the flow to ensure
that fluid leaving the coil maintains the minimum required temperature. Table 2 lists the rate of heat loss per model number.
Heat loss data based on 102°F (39°C) entering coil water, nominal unit flowrate (with water) and -10°F (-23°C) ambient air temperature with a 45MPH
3
(72 km/hr) wind velocity. Fans and pump are off.
TrilliumSeries™ Adiabatic Cooler - TRF Operation & Maintenance Manual – Cold Weather Operation
Model Number
TRF-1010N-C80XL17E
TRF-1010N-C80XS17E
TRF-1014N-C80XS26E
TRF-1014N-C80XM26E
TRF-1018N-C80XM34E
TRF-1018N-C80XD34E
TRF-1022N-C80XM43E
TRF-1022N-C80XD43E
TRF-1026N-C80XD51E
TRF-1026N-C80XQ51E
TRF-1030N-C80XD60E
TRF-1030N-C80XQ60E
TRF-1034N-C80XD68E
TRF-1034N-C80XQ68E
TRF-1038N-C80XD77E
TRF-1038N-C80XQ77E
Table 2. TRF Heat Loss Data
# of
Heat Loss Data
Fans
(BTU/HR)
3
4
4,515,780
4
4,437,940
6
6,814,040
6
6,739,300
8
8,889,800
8
8,740,240
10
11,044,580
10
10,888,320
12
13,260,240
12
12,828,280
14
15,634,340
14
15,187,740
16
17,788,200
16
17,342,760
18
19,935,680
18
19,488,920
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