Generac Power Systems PV Link, Руководство по установке

Страница: 18 / 28

Installation Manual for PV Link and SnapRS 15
2017 and 2020 NEC Compliant Sys -
tems
For NEC 2017 and 2020 NEC compliant sys -
tems, connect the string PV modules in a
series using one SnapRS device per module.
Installing SnapRS Devices
NOTE: Pre-install SnapRS devices to PV
modules to ensure a 1:1 ratio.
When installing SnapRS devices consider the
following:
• Each PV Link can control a connected
string of PV modules with a string voltage
between 60–420 VDC. For string sizing
guidance, see Installation Design Work -
sheet
.
• 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 5-4 . PV modules are installed in
series with SnapRS devices connected
inline between each module.
• See Figure 5-5 . High-voltage modules can
be configured in parallel strings.
NOTE: Install SnapRS devices prior to secur -
ing PV modules to the racking.
To install SnapRS devices:
1. See
Figure 5-4
. 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 string to the
PV Link, the PV Link MC4 connector labeling
will indicate the same polarity as the PV string
connector (ex. PV Link positive (+) will con -
nect to the (+) whip of the first PV module in
the string). This will also be true with SnapRS
installed on the negative (-) whip. This is inten -
tional and differs from the connection method
for combining PV modules together with
SnapRS..
6. Make a string 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 parallel strings
– SnapRS devices per string
– SnapRS date of manufacture.
Figure 5-4. Single-String PV Array with SnapRS Device
A PWRcell Inverter D PV module
B PV Link E PV Substring Input -
C SnapRS Device F PV Substring Input +
C
A
E
F
B
D
C