24 | SAMLEX AMERICA INC.
DC Side Connections
The following DC side connections are required to be made (see Fig 5.8):
• Deep cycle batteries are connected to the battery input terminals (1)
and (2) as shown below. The terminals are provided with protective
covers – RED for Positive and BLACK for Negative. Fit these covers
once connections have been made.
For details on sizing and
charging of batteries, please read on-line White Paper titled
"batteries, Chargers & Alternators" at www. samlexamerica.
com (Home > Support > White Papers).
•
Use appropriate external fuse (Refer to Table 5.1 on page 27) within
7" of battery Positive terminal.
• External charging source, if any, is connected to the connectors (3)
and (4) as shown above.
The maximum capacity of the external
charging source is 50A.
Preventing DC Input over Voltage
It is to be ensured that the DC input voltage of this unit does not exceed
16 vDC for the 12v battery version G4-2012 and 32 vDC for the 24v
battery versions G4-2524 and G4-3524 to prevent permanent damage to
the unit. Please observe the following precautions:
• Ensure that the maximum charging voltage of the external battery
charger / alternator / solar charge controller does not exceed 16 vDC
for the 12v battery version and 32 vDC for the 24v battery version.
• Do not use unregulated solar panels to charge the battery connected
to this unit. Under open circuit conditions and in cold ambient
temperatures, the output of the solar panel may reach > 22 vDC for
12v battery system and > 44 vDC for 24v battery system. Always use
a charge controller between the solar panel and the battery.
• When using Diversion Charge Control Mode in a charge controller,
the solar / wind / hydro source is directly connected to the battery
bank. In this case, the controller will divert excess current to an
external load. As the battery charges, the diversion duty cycle will
increase. When the battery is fully charged, all the source energy will
flow into the diversion load if there are no other loads. The charge
controller will disconnect the diversion load if the current rating of
the controller is exceeded. Disconnection of the diversion load may
damage the battery as well as G4 / other DC loads connected to
the battery due to high voltages generated during conditions of
high winds (for wind generators), high water flow rates (for hydro
generators). It is, therefore, to be ensured that the diversion load is
sized correctly to prevent the above over voltage conditions.
• Do not connect this unit to a battery system with a voltage higher
than the rated battery input voltage of the unit (e.g. do not connect
the 12v version of the unit to 24v battery system or the 24v version
to the 48v Battery System).
Preventing Reverse Polarity on
The Input Side
!
CAUTIon!
Damage caused by reverse polarity is not
covered by warranty.
When making battery connections on the input side, make sure that the
polarity of battery connections is correct (Connect the Positive of the
battery to the Positive terminal of the unit and the Negative of the battery
SECTION 5 |
Installation
DC SIDE LAYOUT
1 -
Battery Positive (+) Input Connector
2 -
Battery Negative (-) Input Connector
3 -
External Charger (+) Input Connector
4 -
External Charger (-) Input Connector
5 -
DC Side Equipment Grounding
Connector
6 -
6P2C Modular Connector for
Temperature Sensor
7 -
8P8C Modular Connector for Remote
8 -
Cooling Fan 1 (sucks air from outside
and discharges inside)
Note:
Cooling Fan 2 is inside the unit
and is not visible.
2
3
8
4
5
6
7
1
DC Side Connections
1. Battery Positive (+) Input Connector –
M8 nut & bolt (RED Protection Cover is not shown)
2 Battery Negative (-) Input Connector –
M8 nut & bolt (Black Protection Cover is not shown)
3 External Charger (+) Input Connector –
M8 Thumb Nut and bolt
4 External Charger (-) Input Connector -
M8 Thumb Nut and bolt
5 DC side Ground Connector – Wire size AWG
# 4-6. Set screw 5 / 16” – 24 UNF
6 6P2C Modular Connector for Temperature Sensor
7 8P8C Modular Connector for Remote
8 Cooling Fan 1 (Cooling Fan 2 is inside the unit and is
not visible)
noTe:
Cooling Fan 1 (8) sucks cool air from outside and
discharges into the unit.
Fig. 5.8 DC Side Layout & Connections
