SQFlex Service Instructions

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5.9 Testing the pump by means of CU 200 SQFlex control unit
The pump must deliver a flow rate (m³/h) at a given power consumption and head. The “Test value curves ‘
on page 61 apply to the head stated for each pump. The curve values are minimum values.
1. Open the discharge valve completely to reduce the counter-pressure to a minimum.
2. Disconnect the power supply to the pump.
3. Remove the front cover of the CU 200, and set the test jumper to service position, see illustration.
Refit the front cover.
4. Connect the power supply.
5. Make sure that the system is off. The red indicator light of the ON/OFF button must be on. If the system
is not off, press the ON/OFF button once.
6. Press the ON/OFF button for at least four seconds. Release the button. The CU 200 is now in test
mode. (The bottom flow indicator is permanently on, and the pump is running slowly.)
7. Press the ON/OFF button twice (the upper flow indicator is permanently on). The pump now adjusts its
speed.
8. Adjust the counter-pressure to the value stated for each pump in the curves in section 5.9.1 Test value
curves on page 61.
9. Read the flow rate Q [m³/h] using a flowmeter or a similar device and the power consumption P1 [W]
using a wattmeter.
10.In the relevant curve chart, find the intersection point of the values read for flow (Q) and power consumption
P1 [W].
- If the intersection is above the minimum curve, the flow rate is sufficient.
- If the intersection is below the minimum curve, the flow rate is insufficient, and the pump should be
checked and defective parts replaced.
11. Press the ON/OFF button once. The CU 200 is no longer in test mode.
12.Disconnect the power supply, and disconnect the pump and the CU 200.
13.Move the test jumper from service to normal position.
TM02 5908 4002
SERVICE
NORMAL
SERVICE
NORMAL
MAIN
SWITCH
Head
HQ
Flow
AC
W
90-240 VAC +6%/-10%
50/60 Hz
Test jumper
sqflex_SI_US_WG.book Page 52 Thursday, October 1, 2009 3:27 PM