MTA TAEevo Tech 101 - Freeze Protection; Chapter 5 Operating Limits

OPERATING AND MAINTENANCE MANUAL
Chapter 5 - Installation
TAEevo Tech 015÷802 60 Hz UL
24
The data in this manual are not binding and they can be modified by the manufacturer without notice. Reproduction of this manual is strictly prohibited
ENGLISH
EN
5.3 Freeze protection
Even if the minimum operating temperature is higher than 0°C/32°F, during shutdown periods in the cold season the unit may
be subject to temperatures that are lower than 0°C/32°F.
In such cases if the water is not drained out of the unit ethylene or propylene glycol antifreeze should be added to the water
in the following percentages:
In accordance with the chilled water outlet temperature, to avoid the formation of ice ethylene or propylene glycol antifreeze
should be added to the water in the following percentages:
NOTE
The water flow rate must correspond to the value stated in the technical specifications or in the selection software.
The conditions specified in the table do not guarantee anti-freeze protection with the machine operating in bypass mode
between water delivery and return, and with the machine water inlet and outlet fittings shut off.
ATTENTION
The anti-freeze setting is 4°C/39°F. To reduce the anti-freeze setting edit parameter AL26.
For water outlet temperatures lower than 6 °C you must add a suitable quantity of antifreeze solution.
5.3.1 Operating limits
The operating limits are decided at the time of sale. Refer to the data specified in the contract.
Ambient T up to
[°C] (°F)
Ethylene Glycol
[% by weight]
Propylene Glycol
[% by weight]
0 (32) 0 0
-5 (23) 15 18
-10 (14) 25 27
-15 (5) 30 33
-20 (-4) 40 40
Water outlet T up to
[°C] (°F)
Ethylene Glycol
[% by weight]
Propylene Glycol
[% by weight]
Standard machine
7 (45) 0 0
3 (37) 20 20
0 (32) 20 25
-3 (27) 25 30
-5 (23) 30 30
-7 (19) 35 35
-10 (14) 35 40
Special machine
-15 (5) 45 45
-20 (-4) 50 50
Ambient air temperature
Evaporator water
inlet temperature
Evaporator water
outlet temperature
Water temperature
gradient
Min Max Min Max Min Max Min Max
°C/°F °C/°F °C/°F °C/°F
-5/23
43/109
(1)
0/32 35/95 -5/23 30/86
4/7 10/18
5/23
43/109
(1)
-5/23 35/95 -10/14 30/86