Maintenance Schedule; Troubleshooting - Honeywell Home CBU142 Einbauanleitung

8.2.2 Maintenance schedule

Interval Measure
Min. once a year The pump and drive motor should run smoothly, the floating ring seals should not leak
Check if the shut-off, drain and check valves function properly and don`t leak.
Strainer in the pressure reducing valve, if applicable
Check the compensators for wear (if applicable).
Check the precharge pressure and, if necessary, check if the membrane pressure vessel leaks.
Check automatic switching.
Check the switch-on/off points of the system.
Check the water supply, precharge pressure, water shortage monitoring, and pressure reducing valve.
Check if the overflow is sealed and clean.
8.2.3 Set the precharge pressure
DANGER!
Filling wrong gas in expansion vessel
Danger of poisoning!
 Only fill the pressure pad with nitrogen.
CAUTION!
Precharge pressure too high
Danger of damaging the tank!
 Observe the values as stated by the manufacturer of
the tank (refer to type label or the tank manual).
The precharge pressure for the pressure vessel should be set
to a value that is lower than the programmed switch-on
pressure.
Example: Precharge pressure 10% below the
switch-on pressure
Precharge pressure of the membrane pressure vessel p = 0.9
x p
E
p = switch-on pressure of the compact booster unit
E
Recommendation
These are average values. Experiments conducted on tanks
have shown that the best storage volumes were achieved for
pressures >3bar with a factor of 0.9 and pressures of <3bar
with a factor of 0.8.
Example:
pE = 5 bar: Precharge pressure 5 x 0.9 = 4.5 bar
pE = 2 bar: Precharge pressure 2 x 0.8 = 1.6 bar
Check the precharge pressure :
1. Close shut-off valves under the membrane pressure
vessel.
2. Empty the membrane pressure vessel via the drain
valve.
3. Unscrew the protective cap of the valve on the
membrane pressure vessel and store it
4. Use a suitable checking device (eg tire-pressure
gauge) to check the precharge pressure.
5. Mount the protective cap of the valve on the
membrane pressure vessel.
MU0H-1382 GE23R0819
GB
Fill the membrane pressure vessel
• Unscrew the protective cap of the valve on the
membrane pressure vessel and store it
• Refill nitrogen via the valve.
• Mount the protective cap of the valve on the
membrane pressure vessel.
8.3 Replace switching device
1. Remove the power plug from the plug socket
2. Pipework needs to be drained
3. Close ball valve
4. Loosen union not of the switching device
5. Replace switching device
6. Fill up pipelines
7. Put power plug into the plug socket
8. press reset-button on the switching device
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Troubleshooting

WARNING!
Improper work for troubleshooting
Risk of injury!
 Observe the relevant instructions in this operating
manual and / or the manufacturer's documentation
Our customer service department is at your service.
Failure to comply will lead to loss of any liablity claims.
A Compact booster unit shuts off
B Pressure fluctuation on pressure side
C The compact booster unit does not start.
D The pump is running but doesn´t pump water.
E Compact booster unit is pumping too little
F Pressure on pressure side too little
G Pressure on pressure side too high
H Leckage of the mechanical seal
Overheating of the motor/pump.
I
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