4. If thermal overloads in main pump starter go into safety without being able to fire heater,
allow 2 minutes for cooling and reset.
5. After circulation is established throughout system, readjust relief valve so that 35 PSI shows
on the hot oil pressure gauge located on front header piping; resume normal operation.
16. Operation in Dusty or Sandy Areas.
a. Protection. Shield blower motor intake, blower intake, circulating pump and circulating pump
motor from dust. Seal the case edge openings of units such as the temperature controller, low
fluid level cutoff, pressuretrol, control box, ultraviolet (U.V.) cell, and end switch.
CAUTION: DO NOT SEAL THE BLOWER INTAKE SO CLOSELY AS TO PREVENT FILTERED
AIR FROM ENTERING.
b. Fuel. See that the fuel is strained before it is put into the external system. Service the fuel
strainers frequently to remove sand and dust.
c. Lubricants. Clean the lubrication points before applying lubricants.
17. Operation Under Rainy or Humid Conditions.
Electric switches, contacts, and terminals corrode and rust easily under rainy or continued humid
conditions. Keep electrical components clean and free of moisture.
If unit is outside and not operating, cover the controls, instruments, electrical components, and
the circulating pump motor and adjacent junction box. Remove covers during dry periods.
18. Operation in Salt Water Areas.
a. General. Wash unit frequently with clean fresh water. Do not contaminate the fuel system or
damage electrical equipment.
b. Protection. Coat exposed metal surfaces with rustproofing material. Remove rust immediately
and apply paint and broil as applicable.
19. Operation in Rough Terrain.
a. Position the hot oil heater as nearly level as possible.
b. Be sure the circulating pump is positioned at the lowest level of operation of the hot oil heater.