Operating instructions

4
INTRODUCTION
In burning heavier fuel and waste oils some oils some means of viscosity
control is required. PHCo Preheaters installed in the fuel supply line to the
burner function perfectly towards this goal. Burning of some heavy oils will
require a two (2) step system as these oils become unpumpable at low
ambient temperatures. If this type of fuel is selected, a PHCo Unitized
Heater should be installed in the storage tank to hold the oil at a pumpable
temperature. This tank should also be insulated and have some form of
agitation installed to keep the oil from separating and settling. Agitation
can be accomplished several ways; a recirculating pump, paddle or
propeller type agitation will work fine. When using heavy oils especially in
cold climates some sort of heat trace may be needed to keep the pump,
strainer, relief valves and lines from freezing. PHCo can help with various
types of systems, please consult the factory. After heat trace is installed a
weather tight insulation job is a must for economical operation.
A properly sized burner feed pump is crucial to any systems operation.
The pump should be sized to deliver 125% - 150% of the maximum fuel
usage by the burner. The pump suction line should also contain strainers
adequate for removal of any foreign objects that could either damage the
pump or clog the metering system and nozzle. Various types of strainers
are available and many will do an adequate job. Double basket type
strainers are especially convenient since they allow the baskets to be
cleaned without shutting down the burner.