INSTALLATION:
1. Type SBS Submers-a-bulbs consist of a mercury tube switch embedded in a polyurethane float. For duplex pump units, the four bulbs function as follows:
Bulb A- Both pumps off.
Bulb B- Pump No.1 on.
Bulb C- Pump No. 2 on.
Bulb D- High Water Alarm.
2. When installing the bulbs, allow 2 inches of cable between the weight and the steadying bracket.
3. The bottom bulb (Bulb A - Both pumps off) should be at a level equal to the top of the motors, when used with Submersible Pumps.
4. Set Bulb D (High Water Alarm) approximately 6 inches below pit inlet level.
5. Switch 3-phase power leads, if necessary, to insure correct pump rotation at start-up.
6. If the Submers-a-bulb panel is out of sight of the pit, it is recommended that NEMA-4 unfused disconnect switch be installed at the pit, for each motor.
7. For STYLE 2 installations, where the NEMA-4 junction box is below the pit cover, install the junction box as high as possible above flood level, since NEMA-4 enclosures are rated ''watertight'' but are not designed for submerged service. All connections to the box should be watertight.
PILOT DEVICE
The SBS Pilot Device consists of mercury tube switches, permanantly sealed in solid poyurethane floats. They are mounted in the pit in any one of three styles as follows:
PILOT DEVICE STYLE 1: The bulbs are mounted on a round suspension plate which sets on the pit cover. A NEMA-4 junction box is furnished for seperate mounting.
PILOT DEVICE STYLE 2: The bulbs are mounted on a bracket for side wall mounting. A NEMA-4 junction box is furnished for separate mounting.
PILOT DEVICE STYLE 3: The bulbs are mounted on a round suspension plate which sets on the pit cover. and NEMA-1 junction box is pedestal mounted on the same suspension plate. (This style is generally used to control non-submersible pumps.)
