Connecting The Electrical Control Panel To A Power Source; Check The Resistance Between The Supply Unit And The True Earth Ground - Graco Therm-O-Flow 55-H Instructions-Parts List Manual

Connecting the Electrical Control Panel to
a Power Source
The Electrical Control Panel (Fig. 4) comes already
attached and wired to the ram, however before the
supply unit becomes functional, you must connect the
electrical control panel to a power source.
WARNING
ELECTRIC SHOCK HAZARD
Do not connect the electrical control
panel to a power source unless you are
a qualified electrician. Failure to follow
standard procedures or to observe the necessary
precautions could result in serious bodily injury or
equipment damage.
CAUTION
If power and grounding connections are not done
properly, the equipment will be damaged and the
warranty will be voided.
Fig. 4
12 310–534
Installation
Have a trained electrician connect the electrical control
panel to a grounded electrical source that has the
required service ratings:
Model:
C32428
C32429
For information about specific terminal locations and
connections, see the wiring diagrams on these pages:
Model:
C32428
C32429
To connect the control panel to the electrical source:
1. Create an opening in the control panel's housing
for the conduit that will enclose the wire from the
facility's power source.
2. Thread the wire from the power source into the
control panel housing, and then connect the power
source wires to the appropriate terminals on the
DISCONNECT switch.
Check the Resistance Between the Supply
Unit and the True Earth Ground
Have a qualified electrician check the resistance
between each supply unit component and the true
earth ground. The resistance must be less than
0.25 ohms. If the resistance is greater than 0.25 ohms,
a different ground site may be required. Do not operate
the system until the problem is corrected.
VAC: Hz: Phase:
240 60
480
VAC:
240
480
WARNING
FIRE, EXPLOSION, AND ELECTRIC
SHOCK HAZARD
To reduce the risk of fire, explosion, or
electric shock the resistance between
the supply unit components and true
earth ground must be less than 0.25
ohms.
Full
Load
Amps
3 69.1
34.6
Pages:
60 – 64
66 – 70