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INSTALLATION
2.1
Automatic Switchover Mounting
2.1.1
The Automatic Switchover electronics unit may be wall mounted indoors or in a protected outdoor location
using the corrosion-resistant wall mounting feet provided. Choose a location free from vibration. Care should
be taken when installing conduit to ensure rainwater, condensation or other contaminants do not enter the
enclosure. See Bulletin 310.1003 for dimensions.
2.1.2
Insert the mounting feet on the automatic switchover enclosure.
2.1.3
Position the enclosure at the desired height and scribe a bolt hole circle through each of the mounting feet.
2.1.4
Drill the proper size holes for the bolts or wall anchors selected. Four (4)1/4” bolts or equal size wall anchors
are recommended.
2.2
Motorized Ball Valves
The motorized ball valves should be installed in the same area as the liquid/gas source.
2.2.1
The motorized ball valves are provided with 1" NPT (liquid system) or 3/4"NPT (gas system) inlet and outlet
connections.
2.2.2
Recommended piping suitable for the liquid or gas must be used. Refer to The Chlorine Institute Pamphlet
No. 6 which recommends that Schedule 80 piping fabricated from ASTM A-106 Grade A or B steel and 3000
pound, A-105 Grade No 1 or 2 forged steel fittings be used for chlorine liquid or gas service.
For chemicals other than chlorine, consult appropriate directory recommendations on pipe and fittings for
the chemical being dispensed.
2.2.3
All threaded connections for chlorine must be sealed with litharge and glycerin or Teflon tape. Litharge and
glycerin sealed connections cannot be disassembled after the sealant hardens.
2.3
Pressure Switches
2.3.1
The pressure switches should be installed vertically above the piping system upstream of the motorized ball
valves, level with the horizontal plane and in the same area as the liquid/gas source.
2.3.2
All threaded connections for chlorine must be sealed with litharge and glycerin or Teflon tape. Litharge and
glycerin sealed connections cannot be disassembled after the sealant hardens.
NOTE: Pressure switches a factory adjusted to actuate at 15 psig upon decreasing pressure.
2.4
Electrical Connections
The Automatic Switchover electronics unit houses a programmable logic controller, indicating lights, and controls for
automatic or manual override system operation. All external components are wired directly to the unit. Refer to the
wiring diagram Bulletin 310.3012.
Recommended wire size for interconnecting the automatic switchover and components is #14 AWG.
CAUTION
To avoid equipment and system damage, ensure power is supplied to all equipment.
