Install Instructions

4
Values are ± 8” (3.2mm).
150 psi (10.5 kg/cm
2
) Levels
Approximate
Distance Above
Cast Line Differential
Setting In. (mm) In. (mm)
Pump #1 Off
15
/16 (24)
5
/16 (8)
Pump #1 On
5
/8 (16)
Pump #2 Off
5
/8 (16)
3
/8 (16)
Pump #2 On
1
/4 (6.4)
Pump #1 Off 1
3
/8 (41)
3
/4 (19)
Pump #1 On
5
/8 (16)
Pump #2 Off
7
/8 (22)
7
/8 (22)
Pump #2 On 0 (0)
Model 159S
0 psi
(0 kg/
cm
2
)
150 psi
(10.5 kg/
cm
2
)
Pressure
Settings and Differential Pressures (continued)
PUMP #1
OFF
PUMP #1
ON
NORMAL BOILER
WATER LINE
(19mm)
3
/4"
DIFFERENTIAL
PUMP #2 ON
AT CAST LINE
7
/8"
DIFFERENTIAL
(22mm)
PUMP #2
ON
PUMP #2
OFF
PUMP #1
OFF
PUMP #2
ON
PUMP #2 ON
AT CAST LINE
NORMAL BOILER
WATER LINE
1
3
/8"
DIFFERENTIAL
(35mm)