Leslie Controls F-1240LDW Constantemp Double Wall Low pressure steam-water Heater - Manual (Page 9)

Figure 5
Groove-pin
Key
Cylinder
(49)
Figure 6
CONTROL VALVE ASSEMBLY
9.
Install pressure relief valve (20) in boss on side of
body. Make sure correct valve body (42) is used.
Body is identified by a drilled hole on side of
flange on center line above hot water inlet for E-
300L body. E-600L has no identification hole
drilled in flange.
10. Assemble valve body (42) to yoke (36) with cold
water inlet facing in the same direction as
window in yoke. Secure with cap screws (39).
11. Install O-ring (11) in groove of temperature
adjuster (14), and, temporarily for alignment
purposes, insert adjuster through yoke window.
Keyway must be vertical and notch on outer
diameter of adjuster, and line up with pin in
temperature adjusting sleeve (33) (See Fig. 5) DO
NOT INSTALL RETAINING RING (12).
12.
With valve plug key and temperature adjuster
(14) lined up on approximately the same center
line, insert valve plug assembly into valve body
(42) bore. Plug assembly will move freely into
body bore until stem collar hits Teflon guide in
temperature adjusting sleeve (33). Push plug stem
up through guide until plug hits stop in valve
body. If plug does not bottom against valve body
stop, turn temperature adjuster (14) back and forth
while pushing plug upwards until key enters into
keyway in temperature adjuster (14). With plug
against stop in body, the lower end of plug will be
approximately 2-3/16 inches inside the lower face
of body.
IMPORTANT: Plug assembly must be held in place
during step 13.
13.
Holding valve plug assembly in place, install the
control valve spring (3). Make sure spring seats
properly on yoke (36) spring seat area. Place
spring guide washer (2) over upper stem and seat.
Install diaphragm plate (29), diaphragm (26), O-