Replace Transformer - Graco Therm-O-Flow 200 Instructions-Parts List Manual

Repair

Replace Transformer

See F . 34, page 59.
IG
1. Turn the Main Power Switch OFF.
2. Open the Electrical Enclosure door.
3. Disconnect the incoming power harness (234) from
the top of the transformer (235).
4. Disconnect the transformer (235) output power
harness wires.
a. On series A through E systems, these wires are
labeled: CR2-W1, CR2-W2, CR2-W3, CR2-W4
and they connect to CR-2.
b. On f systems, these wires are labeled,
RCD-W1, RCD-W2, RCD-W3, RCD-W4, and
they connect to RCD-1.
5. Disconnect the transformer (235) ground wire from
the back panel ground lug.
6. Disconnect the red (+) and black (-) wire of the fan
from pins 4 and 3 of the J7 connector on the AWB
(205). Disconnect the J7 connector from the AWB.
7. Cut the wire zip ties securing the fan wires.
8. Remove the flanged nuts (N) and transformer (235)
from the back panel (201).
9. Install the new transformer (235) onto mounting
studs on the back panel (201) and secure with
flanged nuts (N).
10. Insert the thermal sensor connector from the
transformer (235) onto the J7 connector on the
AWB (205).
11. Reconnect the red (+) wire from the fan into pin 4
and the black (-) wire into pin 3 of the J7 connector.
12. Install the transformer (235) ground wire onto the
ground lug of the back panel (201).
58
13. Connect transformer output power harness (234) to
power terminal connections. Torque to 25–27 in-lbs
(2.8–3.1 N•m).
Transformer Output Power Harness Connections,
Series A through E Systems Table
Power Harness Wires
CR2-W1
CR2-W2
CR2-W3
CR2-W4
Transformer Output Power Harness Connections,
Series F Systems Table
Power Harness Wires
RCD-W1
RCD-W2
RCD-W3
RCD-W4
14. Install the incoming power harness (234) to the top
of the transformer in the voltage port that is labeled
with the same voltage. This number is specified on
the machine serial number label.
480VAC
400VAC
15. Verify all electrical connections, including earth
grounds, are complete and tight. All connections
and plugs must be connected prior to applying
power.
16. Close the Electrical Control Panel door.
17. Apply power to the machine. Turn on the Main
Power Switch.
18. Restart the system.
CR-2 Connections
Terminal 1
Terminal 3
Terminal 5
Terminal 44
RCD-1 Connections
Terminal N
Terminal 5
Terminal 3
Terminal 1
600VAC
ti25228a
334130W