Diassembly
Disassemble in the same general order as indicated in
1.
2.To remove solenoid coil:
Insert small screwdriver into gap in voltage nameplate. Slide screwdriver tip under coil retainer and snap off. If replacing coil, use knife to separate
3.To remove collar, use service tool
important if it becomes necessary to order a parts kit, coil or duplicate valve .
Assembly
1.Assemble in the reverse general order of disassembly.
2.Lubricate gasket and "O" ring sparingly with a compatible lubricant such as a Silicon base lubricant.
3.All moving parts, must move freely over the full length of its intended travel.
Troubleshooting
1.Check system fuses, electrical wiring and system source voltage as specified.
2.Is flow direction arrow on valve the same as system flow direction?
Figure 1
COIL RETAINER
NAME PLATE
SERVICE
TOOL (K)
COIL ASSEMBLY
COLLAR “O” RING (K)
ENCLOSING TUBE
PLUNGER AND
SPRING ASSEMBLY (K)
GASKET (K)
BODY
(K) INDICATES ITEMS INCLUDED IN REPAIR KIT
Cleaning
As with all valves, it may become necessary to clean them periodically to keep them in peak operating condition. Any cleaning methods or fluids used should be compatible with valve materials.
Inspection
1.All moving parts and elastomers should be clean in appearance without permanent set springs should be free of corrosion. If any appear damaged, replace them with a parts kit which contains all moving parts necessary to rebuild valve to an "as new" condition.
2.Inspect enclosing tube assembly for wear, exterior dents or other conditions which would impair free movement of the poppet and/or plunger assembly. Its interior should be clean and free from any obstructions. Be especially critical of its valve seat.
Testing
1.Apply correct voltage to valve solenoid and cycle solenoid sever- al times. A distinct click should be heard each time the solenoid is energized.
2.Pressurize valve and check for leaks.
Note: Alco solenoid valves are equipped with a
3.Are all system relays operating?
4.Is system source pressure as specified?
5.Are all system components free from obstructions?
Repair kits
The following Repair Kits are available:
VALVE |
| KIT |
| VALVE | KIT | |||
SERIES |
| PART NO. | SERIES | PART NO. | ||||
202CB |
| 204CD | ||||||
202CB |
| 204CD | ||||||
202CB |
| 204CD | ||||||
202CB |
| 204CD | ||||||
202CB |
| 204CD | ||||||
202CB |
| 204CD | ||||||
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|
|
|
|
|
| |
|
|
| VALVE | KIT |
|
|
| |
|
|
| SERIES | PART NO. |
| |||
|
|
| For 1/4” | Orifice Only |
|
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| |
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| 204CD |
| ||||
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| 204CD |
| ||||
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| 204CD |
| ||||
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| 204CD |
|
Coils
1.Junction box (AMG) is supplied as standard on all valves.
2.The following coil housings are available:
a. Conduit Connection (AMC) | c. Open Frame (AMF) |
b. GROMMET 113" Leads (AML) | d. Spade Connection (AMS) |
3. Use only Alco coils on Alco valves. |
|
ALCO CONTROLS DIVISION • EMERSON ELECTRIC CO.
P.O. BOX 12700 • ST. LOUIS, MISSOURI 63141 •
CUSTOMER SERVICE • 314 569 4666
|
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American Metal Ware Hot Water Boiler | Page 12 |