Connecting The Wiring - heat-timer MSI OTM Installation And Operation Manual

• Connecting the Probe directly to the Oil Tank
1. Using 1/4" soft copper tubing, connect one end of the tubing to the bottom of the oil tank, and then connect the other
end of the tubing to the bulkhead fitting located at the base of the OTM. Do not use teflon tape on the fittings.
2. Tighten the OTM bulkhead fitting.
DO NOT overtighten the bulkhead fitting. Doing so may cause the fitting to rotate.
7. Continue to "Connecting the Wiring" on page 7 when all devices have been mounted.
Connecting the Wiring
ELECTRICAL SHOCK HAZARD! For your safety, to avoid the risk of electric shock, disconnect electrical power
to the device before servicing or making any electrical connections. DO NOT re‐connect electrical power
until ALL wiring to the MSI OTM is completed. Failure to do so may result in severe personal injury or death.
When wiring the Oil Tank Monitor, it is important to remember that Class 1 voltages must enter the
enclosure through a different knockout than any Class 2 voltage wiring.
1. Connect the power wiring to the Oil Tank Monitor.
a. Run the 120Vac, 60Hz power wires through the power knockout of the OTM enclosure. The left‐most knockout is preferred.
b. Connect the hot line to terminal "L".
c. Connect the neutral line to terminal "N".
d. The terminal marked "G" (ground) must be connected to earth ground.
Heat‐Timer Corp.
CAUTION
WARNING
CAUTION
Installation Instructions 7
059411-00 Rev. A