Grundfos 15 BMQE 05A-110, Руководство по продукту и инструкции

Страница: 22 / 36

Instructions
EZ Boost TM System
22
1
2
Air escape valve
Diaphragm tank
EZ Boost controller
Isolation valve
Pressure gauge
Green
indicator light
Red
indicator light
6.8. BMQE pumps connected in parallel
6.8.1.
When connecting BMQE pumps in parallel as
shown in fig. 5, a separate EZ Boost controller must be
used on each BMQE . Set the pressure on one BMQE 10 PSI
lower than the other.
6.8.2.
For BMQE pumps connected in parallel, mounted
above each other, it is recommended to connect the pipes
as shown in fig. 5. This layout ensures that the BMQE
pumps are filled with water before starting.
Fig. 5 Booster unit with two BMQE pumps
connected in parallel, mounted above each
other.
6.8.3. Notes:
• All BMQE modules are supplied with a non-return
valve.
• BMQE modules connected in parallel may also be
installed vertically.
• As venting problems may arise in such installations, it is
advisable to install suitable air vent devices.
• The BMQE should be positioned with the discharge and
air vent at the top when installed vertically.
6.9. Generator Operation
Power may be supplied to BMQE pumps by an adequately
sized generator. The generator must be sized 50% above
the pumps P1 (input power) values. See following chart.
Motor HP Minimum
generator
size
Recommended
generator
output (watts)
0.33 to 0.50 A 1100 1500
0.50 to 0.75 B 1700 2300
1.0 to 1.5 B 2000 3500
7. Operation
7.1. Starting the BMQE Pump for the First
Time
When the BMQE has been connected correctly, it should
be started with the discharge valve closed approximately
one-third. Due to the soft start feature, the pump takes
approximately 2 seconds to develop full pressure.
Check that the actual inlet pressure is equal to or greater
than the previously estimated inlet pressure.
When not being used, all modules should be filled with
water as all internal bearings are water lubricated.
If the BMQE is taken out of operation for a long period, the
BMQE should be flushed through with clean water. The
modules are then left with clean water until they are to be
used again.
7.2. EZ Boost Controller Operating Functions
7.2.1 On/off button
Fig.6 shows the on/off button of the EZ Boost controller.
Fig. 6
LEZTL01.indd 10/8/2004, 1:39 PM 22