Glow-worm Betacom 4 - Setting the Bypass; Setting the Domestic Hot Water Temperature

30 Installation and maintenance instructions Betacom 4 0020238424_04
Flow rate-pressure curves for 30 kW
(pressure measured downstream of the valves)
21
3
4
60
70
50
30
20
40
10
0 500 1000 1500 A
B
1 Maximum speed (by-
pass closed)
2 Maximum speed (de-
fault setting for the by-
pass)
3 Minimum speed (default
setting for the bypass)
4 Flow rate at maximum
output (ΔT = 20K)
A Throughput in circuit
(l/h)
B Available pressure
(kPa)
Condition: Two-stage pump
▶ If required, change the setting of the pump speed, which
depends on the operating mode, under diagnostics code
d.19.
Overview of diagnostics codes (→ Page 42)
Flow rate-pressure curves for 24 kW
(pressure measured downstream of the valves)
21
3 4
60
70
50
30
20
40
10
0 500 1000 1500 A
B
1 Maximum speed (by-
pass closed)
2 Maximum speed (de-
fault setting for the by-
pass)
3 Minimum speed (default
setting for the bypass)
4 Flow rate at maximum
output (ΔT = 20K)
A Throughput in circuit
(l/h)
B Available pressure
(kPa)
10.3 Setting the bypass
Condition: Modulating pump
If the pump operating parameter d.14 is set to Auto (∆p limit
value), the factory setting must not be changed.
Caution.
Risk of material damage caused by incor-
rect setting of the high-efficiency pump
When the pressure at the bypass valve is
increased (turning clockwise), malfunctions
may occur if the pump output is set below
100%.
▶ In this case, set the pump output to
5 = 100% using diagnostics parameter
d.14.
1
▶ Remove the front casing. (→ Page 16)
▶ Regulate the pressure using the adjusting screw (1).
▶ Install the front casing. (→ Page 16)
Condition: Two-stage pump
1
▶ Remove the front casing. (→ Page 16)
▶ Regulate the pressure using the adjusting screw (1).
▶ Install the front casing. (→ Page 16)
Position of the adjusting
screw
Notes/application
Right-hand stop (screwed
all the way in)
If the radiators do not heat
up sufficiently at the factory
setting. In this case, you must
set the pump to the maximum
speed.
Mid-position (six anti-
clockwise rotations)
Factory setting
Five further anti-clockwise
rotations starting from the
mid-position
If noises are produced in the
radiators or radiator valves.
10.4 Setting the domestic hot water temperature
1. Observe the applicable regulations regarding legionella
prevention.
Danger!
Risk of death from legionella.
Legionella multiply at temperatures below
60 °C.
▶ Ensure that the end user is familiar with
all of the Anti-legionella measures in order
to comply with the applicable regulations
regarding legionella prevention.