Grain Systems PNEG-584 - Manual (Page 10)

10
SERIES TWO HEATER
An adequate power supply and proper wiring are
important factors for maximum performance and long
life of the dryer. Electrical service must be adequate
enough to prevent low voltage damage to motors and
control circuits (see Electrical Load Informationon page
40) In 220V 1 ph and 220V 3 ph systems a sepa-
rate neutral wire is required for the 120V heater
circuit, and should be connected to terminal #1 in
the master heater. Do not run in conduit with mo-
tor power lines. It is necessary to know the distance from the unit to
the available transformer, and the horsepower of your
fan unit. Advise the service representative of your local
power supplier that an additional load will be placed on
the line. Each fan motor should be wired through a fused
or circuit breaker disconnect switch. Check the KVA
rating of the transformers, considering horsepower and
load. The power supply wiring , main switch equipment
and transformers must provide adequate motor start-
ing and operating voltage. Voltage drop during startup
should not exceed 14% of normal voltage, and after
motor is running at full speed it should be within 8% of
normal voltage. Check Electrical Load Information for
HP ratings and maximum amp loads to properly size
wire and fusing elements. Standard electrical safty prac-
tices and codes should be used. (Refer to National Elec-
trical Code)
Transformer and Wiring Voltage Drop Power Supply
It is very important that a Machine To Earth ground
be installed at the worksite. The complete unit must be
wired and grounded to all local applicable codes. The
proper grounding will provide safty to the operators and
ensure long life to all circuit boards.
Machine To Earth Grounding
HEATER INSTALLATION