Leslie Controls F-1240LDW Constantemp Double Wall Low pressure steam-water Heater User Manual
Page 7
SECTION III
MAINTENANCE OF SYSTEM
COMPONENTS
Hot Water Control Valves Dismantling
1.
Close all steam and water inlet and outlet stop
valves. Disconnect tubing from valve body and
upper diaphragm case.
2.
Disconnect Victaulic coupling (43) and remove
gasket (44). Remove reducing coupling (45) and
remove tubing (30).
3.
Loosen and remove casing bolts (5) and nuts (4).
Lift off upper diaphragm case (27).
4.
Remove retaining ring (15) from temperature
adjuster (14) followed by lock nut (13) and cover
plate (16).
5.
Take out retaining ring (12) from adjusting sleeve
(33) and take out temperature adjuster (14) and
key cylinder (10).
6.
Hold upper stem (1) fast by placing an open end
wrench on the upper stem flats and remove the
jam nut (23) with another wrench.
7.
Take out the shouldered washer (25), O-ring (24),
diaphragm (26), diaphragm plate (29), control
valve spring (3), and the spring guide washer (2)
from the lower diaphragm case (6).
8.
Take valve plug assembly from lower opening of
valve body (42).
9.
Remove socket head cap screws (7) and take off
lower diaphragm case (6). Take out O-ring (8)
from top of yoke (36).
10.
Disconnect Victaulic couplings from valve body
(42) and remove gaskets.
11.
Take out cap screws (39) and remove valve body
(42).
12.
Push temperature adjusting sleeve (33) out of
yoke (36).
13.
Valve plug assembly should not be disassembled
unless parts replacement is necessary due to wear
or damage. For disassembly, see instructions
covering assembly of valve plug and reverse
instruction procedure.
14.
All parts should be cleaned with an approved
solvent. Wipe off with a clean cloth. Do Not Use
Abrasives of any kind. Care should be taken in
F-640LDW
Steam
Pressure
psig
Inlet
Water
Temp
0
F
Set
Point
0
F
2
5
10
15
120
54
(15
0
)
60 (14
0
)
60
(13
0
)
60
(12
0
)
140
46
(36
0
)
54
(25
0
)
58
(25
0
)
60
(20
0
)
150
40
(30
0
)
49
(30
0
)
53
(27
0
)
54
(25
0
)
160
34
(30
0
)
41
(30
0
)
44
(30
0
)
46
(30
0
)
40
180
21
(30
0
)
23
(30
0
)
25
(30
0
)
28
(30
0
)
120
60
(12
0
)
60
(11
0
)
60
(10
0
)
60
(9
0
)
140
57
(15
0
)
59
(14
0
)
60
(13
0
)
60
(12
0
)
150
49
(23
0
)
54
(21
0
)
57
(18
0
)
60
(16
0
)
160
42
(30
0
)
49
(28
0
)
51
(25
0
)
56
(20
0
)
F-640LDW
Capacity and
Adjustment Table
(Capacity in GPM)
Numbers in brackets are
approximate Gain Adjustor
settings in degrees.
*Maximum water temperature
setting for F-340LDW
is 150
0
F
** Steam pressure is measured
at the Heat Exchanger inlet.
60
180
29
(30
0
)
33
(30
0
)
39
(30
0
)
44
(30
0
)
CAUTION: Do not allow valve plug assembly to fall
from lower end of the valve body.