Glow-worm Betacom 3 - Setting the Pump Output; Setting the Bypass

Adapting the unit to the heating installation 8
0020229560_00 Betacom 3 Installation and maintenance instructions 21
8.1.2 Resetting the remaining burner anti-cycling
time
▶
Hold the button down for more than 3 seconds.
◁
is shown in the display.
8.2 Setting the pump output
Conditions: Modulating pump
The product is equipped with a speed-regulated high-effi-
ciency pump, which adjusts independently to the hydraulic
conditions of the heating installation.
If the heating installation is equipped with a low loss header,
switch off the speed control and set the pump output to a
fixed value.
▶ If required, use diagnostics code d.14 to adjust the set-
ting for the operating-mode-dependent pump speed.
▶ Set the diagnostics code. (→ Page 15)
Overview of diagnostics codes (→ Page 30)
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)
Conditions: Two-stage pump
▶ If required, use diagnostics code d.19 to adjust the set-
ting for the operating-mode-dependent pump speed.
▶ Set the diagnostics code. (→ Page 15)
Overview of diagnostics codes (→ Page 30)
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)
8.3 Setting the bypass
Conditions: Modulating pump
If the pump operating parameter d.14 is set to Auto (∆p
limit), the default 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 10)
▶ Regulate the pressure using the adjusting screw (1).
▶ Fit the front panel. (→ Page 10)