In situations where multiple EZ Boost power cables are
run parallel in wiring trays or conduit and less than 12
inches apart, the possibility for undesired communication
between units exists.
When this occurs, intermittent
or continuous NO CONTACT is typically seen. Other
unexpected errors may also be seen. Refer to section 1.2
and 8.4, #5 for further instructions.
6.2. Positioning the BMQE pump
The GRUNDFOS EZ Boost BMQE pump is supplied with a
built-in non-return valve. An arrow on the BMQE sleeve
shows the direction of liquid flow through the pump, fig. 3.
The BMQE is suitable for both vertical and horizontal
installation, however, the discharge port should never fall
below the horizontal plane, see fig. 4.
The BMQE must be installed with the air relief vent in the
12 o’clock position when installed horizontally and when
installed in the vertical position, the air vent must be at the
top of the unit.
Fig. 3
Instructions
EZ Boost
TM
System
20
6.1.2. Cable sizing
*
Single-phase 60 HZ maximum cable length motor service to entrance
Motor rating
Copper wire size (AWG)
Volts
HP
14
12
10
Maximum cable length [ft/m]
115
0.50
100/30.5
160/48.8
250/76.2
230
0.50
400/121.9
650/198.1
650/198.1
0.75
300/91.4
480/146.3
650/198.1
1.0
250/76.2
400/121.9
630/192
*
The maximum cable length with one EZ Boost Controller is 650’ and the maximum wire size is 10 AWG.
Allowed
Not allowed
Fig. 4
6.3. EZ Boost controller connection
The EZ Boost controller has two terminal blocks:
• Terminals 1 to 4.
• Terminals 5 to 7.
Furthermore, the EZ Boost controller is equipped with two
screw terminals for the ground leads.
6.3.1. Main power supply, POWER, terminals
1, 2 and PE (ground):
Connect terminals 1 and 2 to the line and neutral leads of
the main supply. Each terminal can be connected to any of
the two leads.
NOTE:
Circuit breaker: Maximum 16 A.
IMPORTANT:
The main power supply cables must not be
connected to terminals 3 and 4 (PUMP).
6.3.2. Motor leads, PUMP, terminals 3, 4 and
PE (ground):
Connect terminals 3 and 4 to the line and neutral leads of
the pump. Each terminal can be connected to any of the
two leads.
LEZTL01.indd
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