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3.- COMMISSIONING AND OPERATION
3.4.- CHECKING THE WATER FLOW RATE
It is very important that the unit operates at the correct water flow rate. It is dangerous to leave the unit operating at a low flow rate
as this could result in serious damage to components as well as the water exchanger. If the unit operates at too high a flow rate, this
will also hinder optimum performance. The best way of determining the operating flow rate is to measure the temperature difference
between the inlet and water outlet.
Checking the water flow rate (it is vital to measure the thermal peak) (Standard unit)
For nominal and minimum water flow the difference between the inlet and water outlet temperature should be 5ºC (cooling and heating
pump units in cooling cycle only) for an inlet temperature of 12°C, an outlet temperature of 7°C and an outside temperature of 35°C. If
these conditions change, the unit capacity will also change and as a result for nominal flow the difference between the inlet and water
outlet temperature will vary slightly from 5ºC as can be seen in the following table, based on nominal flow rate.
Water outlet ºC
7
9
11
If the unit must be started in the heating cycle and if you wish to operate at nominal cooling rate, the following shows the
approximate differences between the inlet and water outlet temperatures for the various conditions.
Water outlet ºC
35
50
NOTES:
•
The unit control system displays the inlet and water outlet temperature to be displayed. See the Control Description section.
•
Check that the correct water pump has been selected, taking into account the loss of pressure in the hydraulic system. It is
dangerous to let the unit run at a low rate and any faults which may result will not be covered under warranty.
•
Do not start up the air conditioning units or the fan coils until the water temperature reaches the set temperature or use an
automatic control device which cancels the air conditioning unit operation if the installation is not properly set.
•
When everything is operating normally, take a reading of all the data and fill out the Commissioning Sheet.
Installation manual / eCOMFORT R32-MIL166E-0222 - 09/2022
∆T (Water inlet temperature - Water outlet temperature)
15
20
25
6,1
5,8
5,5
6,5
6,2
5,9
7,0
6,7
6,4
∆T ( Water inlet temperature - Water outlet temperature)
Outside Temperature (ºC BH)
-6
0
4,5
5,5
4
5
Outside temperature (ºC)
30
35
5,3
5,0
5,6
5,3
6,0
5,7
6
6,5
6
40
45
4,7
4,4
5,0
4,7
5,4
5,0
12
18
7,5
8,5
7
8
• 72 •
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