●
BDM-250-AU (Australia and New Zealand), BDM-250-EU (Europe)
L1(red)to L2(black)
200 to 270 Vac
●
BDM-250-LV (U.S. and Mexico)
L1/L2(red) to N(black)
127 Vac
2. Mount the adapter plate at a suitable loca
�
on on the PV racking system (typically
at the end of a row of modules).
3. Install an appropriate junc
�
on box with the adapter plate.
4. Connect the open wire end of the AC interconnect cable into the junc
�
on box using
an appropriate gland or strain relief
fi�
ng. The AC interconnect cable requires a
strain relief connector with an opening of 3/8 inches in diameter.
Step 2 - A
�
ach the BDM-250 t
o
the Racking
1. Mark the approximate centers of each PV module on the racking system. Evaluate
the loca
�
on of the micro inverter with respect to the PV module junc
�
on box or any
other obstruc
�
ons.
WARNING:
ALLOW A MINIMUM OF .75 INCHES BETWEEN THE TOP OF THE ROOF AND THE
BOTTOM OF BDM-250. WE ALSO RECOMMEND THAT YOU ALLOW .50 INCHES BETWEEN THE
BACK OF THE PV MODULE AND THE TOP OF BDM-250. DO NOT MOUNT BDM-250 IN A
LOCATION THAT ALLOWS LONG-TERM EXPOSURE TO DIRECT SUNLIGHT.
2. If using grounding washers (e.g., WEEB) to ground the micro inverter chassis to the
PV module racking, choose a grounding washer that is approved for the racking
manufacturer. Install a minimum of one grounding washer per micro inverter.
Torque the micro inverter fasteners to the values listed below.
1/4” moun
�
ng hardware – 45 inlbs minimum
5/16” moun
�
ng hardware – 80 inlbs minimum
3. Mount one micro inverter at each of these loca
�
ons using hardware recommended
by your module racking vendor. Moun
�
ng slots on the micro inverter are 0.33
inches in diameter. Maximum bolt size is 5/16 inch. The two slots on the micro
inverter are 4 inches apart.
Step 3 - C
o
nnect the BDM-250 Wiring Harnesses
Each BDM-250 comes with one 3-pin bulkhead receptacle (or short pigtail) and
one 70-inch AC wire harness with mul
�
-pin connectors. (The DC input wires are
approximately six inches long and are terminated with single pole connectors.)
The AC connectors are oppositely sexed, so that mul
�
ple inverters can be
connected to form one con
�
nuous AC branch circuit.
1. Orient the
fi
rst BDM-250 in each branch with its male connector facing the
junc
�
on box. The junc
�
on box AC interconnect cable has a female connector.
The BDM-250 can be mounted with either side facing up to accommodate
cable rou
�
ng. Connect the
fi
rst BDM-250 to the AC interconnect cable.
2. Plug the AC connector of the
fi
rst BDM-250 into the connector of the next
BDM-250, and so forth, to form a con
�
nuous AC branch circuit. Please check the
BDM-250 ra
�
ng label for the maximum allowable number of BDM-250 on one
AC branch circuit. For the chain of the BDM-250 micro inverters thus formed,
one end of the AC cable should be protected by a CAP (refer to the BDM-250
accessories). For the other end of the AC cable, it should be connected to an AC
junc
�
on box through a tail cable (refer to the BDM-250 accessories). For
BDM-250-240A and BDM-250-208A, the L1 wire (red), L2 wire (black) and
neutral wire (blue) in the AC cable should be connected to the corresponding
phases of the main grid through the AC junc
�
on box. For BDM-250-AU and
BDM-250-EU, the L1 wire (red) and L2 wire (black) should be connected to the L
and N phases of the main grid respec
�v
ely at the AC junc
�
on box. For
BDM-250-AU and BDM-250-EU, the neutral wire (blue) is unused and should be
terminated in the AC junc
�
on box on an unused connector. It should NOT be
connected to L1 (red), or L2 (black), or earth, or any other wires.
WARNING:
DO NOT EXCEED THE MAXIMUM NUMBER OF BDM-250 IN AN AC BRANCH
CIRCUIT, AS DISPLAYED ON THE UNIT-RATING LABEL. EACH BDM-250 AC BRANCH CIRCUIT
MUST BE SOURCED FROM A DEDICATED BRANCH CIRCUIT PROTECTED BY A 15A MAXIMUM
BREAKER.
3. Install a protec
�v
e end cap on the open AC connector of the last BDM-250
in the AC branch circuit.
WARNING:
MAKE SURE PROTECTIVE END CAPS HAVE BEEN INSTALLED ON ALL UNUSED
AC CONNECTORS. UNUSED AC BDM-250 WIRE HARNESS CONNECTORS ARE LIVE WHEN
THE SYSTEM IS ENERGIZED BY THE UTILITY SYSTEM.
07
06
