6
SBS-H2 Users Manual
Rev 1.4
January 6
th
2013
7.0 Installation
Hydrogen gas has only 7% of the density of air, and thus rises. Your hydrogen gas detector
should be installed at the highest, draft-free location in the battery room, cabinet, or
compartment where hydrogen gas would accumulate.
Carefully remove the cover by pulling it off the detector. Attach the detector to the wall, ceiling,
or optional junction box using the mounting holes at the top and bottom of the detector mounting
plate.
For hard wiring using conduit, the detector box will fit onto the optional junction box.
The detector has terminal blocks for connection to a single-phase 120 VAC 50/60 Hz power
source, OR a +12 VDC Regulated Power Source or a +14-48 VDC power source. It also has
two internal alarm relays. A 1% warning relay that is activated at 1% concentration of hydrogen
gas and a 2% alarm relay that is energized at 2% concentration of hydrogen gas. The relays
can be used to switch on a remote exhaust fan and/or to turn on an alarm.
For 120 VAC power, use 18 gage stranded wire minimum (Belden 19348, equivalent or better).
For relay wires, use stranded wire (Belden 8473, equivalent or better). Maximum wire size for
connector terminations is 14 AWG stranded copper wire.
Power Requirements:
Current (A)
Power (W)
Voltage
1 Sensor
2 Sensors
1 Sensor
2 Sensors
VDC
12
0.154
0.302
1.848
3.624
VDC
24
0.090
0.167
2.160
4.008
VDC
48
0.052
0.090
2.496
4.320
VAC
120
0.035
0.062
4.200
7.440
The detector's relay dry contacts are rated at 10A/250VAC, sufficient for most 1/3 HP exhaust
fans. For higher current requirements, add an external relay.
Locate the Sensor installation point within 25 feet of the detector and mount the sensor. Run
the supplied cable from the sensor to the detector and connect to the Sensor 1 input labeled on
the cover.
AC Cord
-
not included
(
SBS Part# E190399
)
Unit shown with 3-prong grounded AC
Cord (18+ AWG)
Pre-March 2016 Version
