Graco 309909H Replacing Solenoids, Replacing Alternator Regulator, Replacing Alarm

Repair

Replacing Solenoids

Follow this procedure to replace a single solenoid.

1.Remove User Interface cover. See page 16.

2.Disconnect two solenoid wires (V) from main board. FIG. 8.

3.Disconnect dispense valve pilot lines (A1, A2, B1, B2). FIG. 8.

4.Remove two screws (S).

5.Remove and replace solenoid (306b).

From left to right, solenoid functions are as follows:

•Component A

•Component B

6.Reassemble. Solenoid wires are polarized (red +, black –). Refer to Electrical Schematic, page 22.

Replacing Alternator Regulator

1.Remove User Interface cover. See page 16.

2.Remove two screws (309) from the back of the con- trol box.

3.Disconnect supply and exhaust air lines (310). FIG. 5, page 19.

4.Disconnect solenoid wires 12 position Phoenix con- nector (306r) from main board.

5.Remove solenoid module (306) with regulator (306e). FIG. 8.

6.Unscrew and replace regulator (306e).

7.Reassemble. Refer to Electrical Schematic, page 22.

Make sure gaskets (306j, 306k) are in place when reinstalling solenoid module.

8. Set regulator to 24 psi (160 kPa, 1.6 bar).

Replacing Alarm

1.Remove User Interface cover. See page 16.

2.Disconnect alarm wires from main board.

3.Unscrew alarm (313) and replace. FIG. 5, page 19.

4.Reassemble. Refer to Electrical Schematic, page 22.

Dispense Valve		1	Set regulator pressure to 24 psi (160 kPa, 16 bar).						310
Pilot Lines
		2 Safety relief valve (306t) is required on all IS units.
A1 (off), clear tube
A2 (on), black tube
B1 (off), green tube
B2 (on), red tube									306e 1
									V
B1
								A	B
A1	B2
A2
									306t	2
				306k	306j	B2
			TI4699a			A2	S	306b	TI4558a
						A1	B1

FIG. 8

20 309909H