QED Environmental Systems
Page 14
ADDP Manual
The
2
and
3
HP compressors should have 60 to 80 gallon tanks. A
5
HP
compressor should have an 80 gallon tank and the
7-1/2
HP and
10
HP
compressors should have a 120 gallon tank. Storage tanks and automatic
pressure shut off switches provide a buffer so the compressor motor can cool
between each time the tank is pressurized.
Electrical wiring for the Compressor
All electrical connections should be made by a licensed electrician and
in accordance with the electrical code for particular areas. The wiring
should provide full motor nameplate voltage and current at the motor
terminals during starting.
Wiring hook-up must be made so that the compressor flywheel turns
in the proper direction. There is usually an arrow on the flywheel to
indicate the proper rotation direction.
Motor overload protection
To prevent motor damage, provide all compressor motors with overload
protection. Some motors are furnished with built-in thermal overload
protection.
To prevent motor damage due to low voltage or undue load imposed
on the motor, larger motors should be used in conjunction with starters
that include thermal overload units.
To determine the proper thermal protection (thermal element), consider
the load to be carried, starting current, running current and ambient
temperature. Recheck electric current characteristics against nameplate
characteristics before connecting wiring.
NOTE: Fuses are for circuit protection only, and are not to be considered
motor protection devices. Consult your local power company regarding
proper fuse size.
In compressors requiring lubricating oil, do not use synthetic oil.
Synthetic oil adversely affects the
DDP
. Non-detergent 30 Weight oil is
recommended for compressor lubrication.
An automatic drain should be installed on the compressor holding tank to
periodically drain the water and oil which collects in the tank
.
