OPERATING AND MAINTENANCE MANUAL
Chapter 5 - Installation
TAEevo Tech 015÷802 60 Hz UL
27
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
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5.4.1 Evaporator water limit features
For correct operation, install a filter (with mesh of 0,5/0,8 mm) close to the unit’s water inlet connection. Failure to
comply with this requirement may cause irreparable damage to the evaporator.
5.5 Expansion vessel
In the presence of a closed hydraulic circuit an expansion vessel must be installed.
The expansion vessel must always be installed on the pump suction side.
To calculate the minimum volume of the expansion vessel use the formula shown below, which is valid if the circuit pressure
is less than or equal to 0.5 bar / 7.2 PSI when the pump is idle and the maximum working pressure of the expansion vessel is
greater than or equal to 4 bar / 58 PSI.
The volume of expansion vessel V in litres is provided by the formula:
V = 2 · Vt · (Ptmin - Ptmax)
where:
Calculation example:
Vt=200 litres
percent ethylene glycol by volume=30%
tmin=5°C from table Ptmin=(1.045+1.041)/2 = 1.043
tmax=40°C from table Ptmax=1.0282
V=2 · 200 · (1.043 - 1.0282)=5.92 litres
Vt= Total circuit volume in litres
Ptmin= Specific density at minimum temperature that can be reached by the water throughout a twelve month
period expressed in °C (also during system shutdown)
Ptmax= specific density at minimum temperature that can be reached by the water throughout a twelve month
period expressed in °C (also during system shutdown)
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