4031-00014-B1-001, Rev. A (02/2023)
11. Remove all battery covers.
12. Remove all hardware from battery terminals and store in
a bag or convenient place. (Fig. 2-5)
13. Install 876-00059-20 BAT,INTG,36VDC,2STRG,PN4FT,W/
BIU,PTS,BS in the PN-4 FT with two battery trays. (See
Fig. 1-1, Fig. 2-9 and p/n 031-00014-08 System Wire
Diagram available on Alpha's website for reference.)
A. Start with A string battery cables on the bottom
tray of the PN-4 FT. Route the black wire through
the hole in left side of the top tray as seen in Fig.
2-6. Route the red wire along the right side of the
enclosure.
B. Install B string battery cables on middle tray.
C. Install intercell fuses on batteries 2A and 3A, and 2B
and 3B. (On AlphaCell® 210FTX batteries, the fuse
can be offset to the back. On PowerSafe® SBS 190F
batteries, the fuse must be offset to the front.)
D. Install interconnect bus bars on batteries 1A and 2A,
and 1B and 2B.
E. Install Precision Temperature Sensors (PTS). Plug in
to appropriate BIU1 port (ex: PTS A cable into the
PTS A BIU1 port) in turn so they don’t get mixed up.
Route wires down the right side. Use wire label A
& B provided by installer to mark both ends of PTS.
Note: The PTS are 4ft long.
F. Install battery voltage sense wires. Route wires
down the right side.
G. Torque battery terminals to battery manufacturer's
specifications.
H. Check battery cable connectors for correct polarity
and voltage. Verify connector color, orientation and
wire labels, then fully insert into BIU1.
Note: The BIU will power up as soon as the
batteries are connected, regardless of circuit
breaker position.
I. Before installing covers, use a corrosion inhibitor
such as NO-OX®electrical contact grease on battery
terminals. Install battery covers. (On PowerSafe SBS
190F batteries, the covers must be trimmed with
side cutters to fit around the intercell fuses. See Fig.
2-7. Trim side needed.)
14. Plug in battery voltage sense connector into BIU1.
15. Connect BIU1 extension cable from BIU DC Output to
XM3.1-HP™ power supply Battery Input.
16. Connect RS485 COM cable from BIU1 COM1 to
XM3.1-HP power supply BIU connection.
Fig. 2-5, Remove Battery Hardware
Fig. 2-6, Installing Battery Cables and Intercell Fuses
Fig. 2-7,Trimming Battery Cover on PowerSafe®SBS 190F
A
B
Intercell Fuses
1A
1B
2A
2B
3A
3B
Intercell Fuse
Trim the
side needed
