MNPV2, 3, 4 and 6 Combiner Manual

MNPV2, MNPV3, MNPV4, MNPV6 Instructions (continued)
3 | P a g e 10- 0 1 0 - 1 R E V : G
Installation
The installation of a PV combiner is fairly straight forward. Select the location to install your combiner first.
Some systems have the PV modules located close to the inverters and or battery system. If this is the case, you
can elect to mount the MNPV inside and run each PV string down to the MNPV inside the house. This is
convenient for trouble shooting and upgrading. For longer runs the combiner will be mounted outdoors on the
pole for pole mounted PV arrays or similar mounting for rack mounted arrays. The combiner can be mounted in
the vertical position or slanted backwards to accommodate up to a 3/12 (22.5°) roof pitch. All unused holes
should be blocked using RTV sealant or some similar goop in order to keep rain and insects out of the
enclosure. Care must be taken to insure that no water will get on terminal busbars when mounted less than
vertical.
The following dimensioned drawings show the location and size of knockouts available on the MNPV3&6. Note
that on the MNPV6 the center bottom knock out is sized for a 1 1/4” conduit adapter. The left and right side
each have a ½” knock out for either wire entry or for lightning arrestors. Lightning arrestors may require a
locknut on the outside in order to clear the lid.
The MNPV3 and MNPV6 are type 3R rainproof enclosures. On MNPV3 models the knockouts on the sides
should only be used when mounted vertically. Water can enter through these openings when mounted at an
angle. On MNPV6 units these knockouts can be used with the combiner tilted as much as 45°.
MNPV6 & MNPV6-250 Bottom conduit locations and sizes
MNPV3 bottom conduit locations