Glow-worm Envirosorb3 - Manual (Page 23)

Start-up 6
0020154078_03 Envirosorb₃ Installation instructions 23
6.7 Operating noises
"Hhmmm..." (*)
"Ttsheeh...!"
"Eeee..."
“Clink!"
"Chug, chug,
chug,..."
"Whirr..." (*)
1
2
3
4
5
6
* Permanent operating
noises
The noises listed do not constitute a fault with the heat
pump.
In various operating modes, the noises come from the heat
pump (Start, Thawing, Stop).
6.8 Adjusting the heating circuit
6.8.1 Purging the heating circuit
Conditions: SW14 open-end spanner
▶ Connect one end of the hose to the purging valve.
▶ In order to collect the residual glycol when purging the
heating circuit, insert the other end of the hose into the
mixing container.
▶ Close the stop valves on the back of the product.
▶ Increase the pressure in the heating circuit.
▶ Open the purging valve with an open-end spanner.
▶ Open the lower stop valve on the back of the product.
▶ If liquid escapes from the pipe, close the purging valve.
▶ Check the pressure in the heating circuit. If necessary,
increase it.
– Operating pressure: 0.15 … 0.2 MPa (1.50
… 2.0 bar)
▶ Open the service valves on the back of the product.
▶ Remove the hose and the mixing container.
6.8.1.1 Available pressure in the heat pump
heating circuit
A
B 0
10
20
30
40
50
60
70
80
500 0 1000 1500 2000
C
100
200
300
400
500
600
700
800
90 900
2500
3
2
1
4
1 Envirosorb
3
5 (water tem-
perature 20 °C)
2 Envirosorb
3
8 (water tem-
perature 20 °C)
3 Envirosorb
3
11 (water
temperature 20 °C)
4 Envirosorb
3
15 (water
temperature 20 °C)
A Remaining feed head
(kPa)
B Flow rate (l/h)
C Remaining feed head
[mbar]
6.8.2 Adjusting the heating circuit flow rate
Caution.
Risk of material damage due to frost
If the minimum flow rate is too low, the heat
exchanger may become damaged by frost.
▶ Operate the product with a sufficient flow
rate (see table).
The product is designed for operation between the minimum
flow rate and maximum flow rate, as specified in the table. If
the product is operated with the minimum flow rate, this res-
ults in a loss of energy and efficiency. The heating comfort is
still guaranteed but the energy savings are reduced.
En-
virosorb
3
5
En-
virosorb
3
8
En-
virosorb
3
11
En-
virosorb
3
15
Minimum
flow rate 380 l/h 380 l/h 540 l/h 1,200 l/h
Maximum
flow rate 860 l/h 1,400 l/h 1,900 l/h 2,590 l/h
You can read the flow rate directly from the controller. De-
pending on the type of liquid in the heating circuit, the flow
rate displayed on the controller may be exaggerated.
Example: If you use a 30% mixture of propylene glycol and
the liquid temperature is 5 °C, you must subtract 400 l/h from
the value shown on the display.
▶ Use the following table to compare the various exaggera-
tion flow rate values depending on liquid type.
– Applies for: Envirosorb
3
5,