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ECS & CXT-E Control Valve Retrofit for SW Double Wall Heaters
Technical Instruction Document
TID-0140_0A
12/30/2014
AERCO International, Inc.
•
100 Oritani Dr.
•
Blauvelt, New York 10913
•
Phone: 800-526-0288
Page 25 of 58
3.1.2 Valve Reassembly Procedure
Reassembly is accomplished by basically reversing the previous Disassembly steps. Refer to
Figure 3-1 or 3-2 for the applicable Valve size. Perform the following steps in the order specified
and REPLACE the items shown in
BOLD
type
with the new parts provided in the Retrofit Kit.
1. For 1 inch to 2 inch Valve sizes, refer to Figure 3-1 and reassemble or
replace
the
following items in the order specified:
a. Valve Plug Shaft (5)
b. Seat Retainer (34)
c.
Replace Disc Seat (7)
d. Retaining Disc (8)
e. Lower Shaft (16) and Valve Stem (12)
f.
Valve Stem Retaining Nut (35)
g. Pilot Spring (10)
h. Retaining Ring (3)
i.
Lock Washer (23)
j.
Proceed to step 3 and continue the Valve Reassembly process. Steps 3 through 6
apply to ALL valve sizes.
2. For 2 ½, 3 and 4 inch Valve sizes, refer to Figure 3-2 and reassemble or
replace
the
following items in the order specified:
a. Top Piston (6) and Bottom Piston (3) Assemblies
b. Replace Valve Seat (7)
c. Lower Shaft (16) and Valve Stem (12)
d. Valve Seat Retaining Disc (8)
e. Socket Head Cap Screws (9)
f.
Pilot Spring (10)
g. Pilot Spring Backup Washer (31), - 4 inch Valve Only
h. Pilot Spring Retainer (11)
i.
Lock Washer (23)
j.
Proceed to step 3 and continue the Valve Reassembly process. Steps 3 through 6
apply to ALL valve sizes.
3.
Replace Valve Top Gasket (13)
and reassemble Valve Top (21) on Valve Body (1).
4. Secure Valve Top (21) to Valve Body (1) with the Bolts or Cap Screws (14).
5.
Replace Packing Assembly (20)
and reassemble Packing Nut (18) in Valve Top (21).
6. The last step of the Valve Reassembly procedure is to
replace two Hex Nuts
on the
Valve Shaft. Valve sizes from 1 to 3 inches contain
two 1/4-20 Hex Nuts
in the Retrofit
Kit. However, 4 inch Valves contain
two 3/8-16 Hex Nuts
in the Kit. Replace the
appropriate Hex nuts on the Valve Shaft.