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American Metal Ware Hot Water Boiler Page 12
Diassembly
Disassemble in the same general order as indicated in exploded-view
illustrations except as noted in the following steps:
1.
2.
3.
Notes: Do NOT Lose Nameplate, as it is extremely
important if it becomes necessary to order
a parts kit, coil or duplicate valve .
Assembly
1.
2.
3.
Troubleshooting
1.
2.
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.
2.
Testing
1.
2.
3.
4.
5.
Repair kits
The following Repair Kits are available:
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.
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.
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.
Apply correct voltage to valve solenoid and cycle solenoid sever-
al times. A distinct click should be heard each time the solenoid
is energized.
Pressurize valve and check for leaks.
Note: Alco solenoid valves are equipped with a
contlnuous-duty solenoid coil,which when energized
for an extended period of time becomes hot to the
touch...this is a safe operating temperature. Any
excessive heating will be indicated by smoke and
odor of burning coil Insulation.
Are all system relays operating?
Is system source pressure as specified?
Are all system components free from obstructions?
Check system fuses, electrical wiring and system source voltage
as specified.
Is flow direction arrow on valve the same as system flow
direction?
Assemble in the reverse general order of disassembly.
Lubricate gasket and "O" ring sparingly with a compatible
lubricant such as a Silicon base lubricant.
All moving parts, must move freely over the full length of its
intended travel.
De-pressurize valve and disconnect electrical power source.
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 adhesive-backed valve nameplate from coil.
Keep valve nameplate.
To remove collar, use service tool X11981-1 shown in Figure 1.
VALVE
SERIES
202CB -B
202CB -F
202CB -N
202CB -P
202CB -T
202CB -V
VALVE
SERIES
204CD -B
204CD -F
204CD -N
204CD -P
204CD -T
204CD -V
KIT
PART NO.
K-1072
K-1075
K-1073
K-1076
K-1077
K-1074
KIT
PART NO.
K-1063
K-1066
K-1067
K-1064
K-1068
K-1065
VALVE
SERIES
204CD -B
204CD -V
204CD -T
204CD -P
KIT
PART NO.
K-1162
K-1164
K-1167
K-1166
For 1/4” Orifice Only
COIL RETAINER
NAME PLATE
COIL ASSEMBLY
COLLAR
“O” RING (K)
ENCLOSING TUBE
PLUNGER AND
SPRING ASSEMBLY (K)
GASKET (K)
BODY
SERVICE
TOOL (K)
(K) INDICATES ITEMS INCLUDED IN REPAIR KIT
ALCO CONTROLS DIVISION • EMERSON ELECTRIC CO.
P.O. BOX 12700 • ST. LOUIS, MISSOURI 63141 • 314-569-4500
CUSTOMER SERVICE • 314 569 4666
Figure 1