Generac Power Systems PV Link 010023, Installation Manual

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Installation Manual for PV Link and SnapRS 15
5. Make a substring map using the serial
number stickers and record in Table 1 :
PV Link and SnapRS Important Infor -
mation the following information:
– Each PV Link serial number
– Each PV Link RCP number
– Number of substrings in parallel.
2017 and 2020 NEC Compliant Sys -
tems
For NEC 2017 and 2020 compliant systems,
connect the substring PV modules in series
using one SnapRS device in between each
module.
Installing SnapRS Devices
NOTE: Pre-install SnapRS devices to each
PV modules negative (-) whip to ensure a 1:1
ratio.
When installing SnapRS devices consider the
following:
• Each PV Link can control a connected sub -
string of PV modules with a cumulative volt -
age between 60 – 420 VDC. For substring
sizing guidance, see Installation Design
Worksheet .
• The positive (+) end of one (1) SnapRS
device must be installed to the negative (-)
lead of each PV module in the array.
• PV modules require Staubli (Multi-Contact)
MC4 connectors. Brands other than Staubli
MC4 connectors are not recommended.
NOTE: MC connectors are not watertight
unless mated. Never leave this system par -
tially assembled.
• See
Figure 5-5 . PV modules are installed in
series with SnapRS devices connected
inline between each module.
• See Figure 5-6 . High voltage modules can
be configured in using parallel substrings to
the input of the PV Link.
NOTE: Install SnapRS devices prior to secur -
ing PV modules to the racking.
To install SnapRS devices:
1. See
Figure 5-5
. For each PV module in the
PV string, connect the positive (+) end of
one SnapRS device (C) to the negative (-)
whip of the PV Module (D).
2. Connect the negative (-) end of each
SnapRS device to the positive (+) whip of
the next PV module in the series.
3. Connect the PV string positive lead to PV
Link (B) at the location marked PV Sub -
string Input + (F). See Component Loca -
tions for more information.
4. Connect the PV string negative lead with
its connected SnapRS device to PV Link
(B) at the location marked PV Substring
Input - (E). See Component Locations for
more information.
5. Secure the SnapRS devices to the racking
or module frame using zip ties or a similar
fastener.
NOTE: When connecting the PV substring to
the PV Link, the PV Link MC4 connector label -
ing will indicate the same polarity as the PV
substring connector (ex. PV Link positive (+)
will connect to the (+) whip of the first PV mod -
ule in the substring). This will also be true with
SnapRS installed on the negative (-) whip.
This is intentional and differs from the connec -
tion method for combining PV modules
together with SnapRS..
6. Make a substring map using the PV Link
peel-and-stick serial number stickers and
record in Table 1 : PV Link and SnapRS
Important Information the following infor -
mation:
– Each PV Link serial number
– Each PV Link RCP number
– Number of substrings in parallel
– SnapRS devices per substring
– SnapRS date of manufacture.