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2Domestic water supplyBMQEOperating conditionsFlow:Max. 39 US gpm (8.9 m3/h)Head: Max. 300 ft (91.4 m)Liquid temperature: Max. 95°F (35°C)Operating pressure: Max. 347 psi (23 bar)Inlet pressure:Min. 8 psi (0.55 bar)Sound-pressure level:The sound pressure level of the BMQEis lower than 74 db[A] at a distance of3 ft (1 m).Controller installationAll BMQE pumps can be connected to BMQEcontrollers. Each BMQE pump must be connected toits own BMQE controller.InstallationLocation of installationThe sound pressure level of the BMQE is
Domestic water supply2BMQE pumps connected in parallelWhen connecting BMQE pumps in parallel (fig. 10) aseparate BMQE controller must be used on eachBMQE pump.Set the pressure on one BMQE 10 psi lower than theother.For BMQE pumps connected in parallel, mount oneabove the other; it is recommended to connect thepipes as shown in fig. 10. This layout ensures that theBMQE pumps are filled with water before starting.Pressure sensor installationThe BMQE controller keeps the pressure constant inthe place where the pressure sensor is positioned.The maximum shielded cable length for the sensormust not exceed 1600 ft (487.7 m).Generator operationPower may be supplied to BMQE pumps by anadequately sized generator. The generator must besized 50 % above the pumps P1 (input power) values.BMQEMotor HpMinimumgenerator size[watts]Recommendedgenerator output[watts]0.33 to 0.50 A 1100 15000.50 to 0.75 B 1700 23001.0 to 1.5 B 2000 3500TM04 9413 4110Fig. 10 Booster unit with two BMQE pumps connected inparallel, mounted one above the otherAdditional considerations when connecting in parallel:• All BMQE modules are supplied with a non-returnvalve.• BMQE modules connected in parallel may also beinstalled 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 dischargeand air vent at the top when installed vertically.• When the maximum flow for BMQE pumps inparallel will exceed 35 gpm, a 4-gallon or two2-gallon diaphragm tank(s) should be used.11
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