44 UNT-SVX07B-EN
Installation—Mechanical
If the piping package has modulating valves: To manually drive the valve open, depress the
button stem on top of the valve and push the lever located on the side of the valve to the full
open position.
2. For presetting, use the appropriate valve curve shown in Figure 13, p. 45 to determine which
setting is necessary to achieve the appropriate pre
ssure drop. The “M” line is the appropriate
line.
3. Carefully remove the Schrader pressure port connecti
on caps on the manual circuit setter, since
they will be at the same temperature as the pipeline.
4. Bleed all air from the hoses and meter before reading
the pressure drop. Refer to the gauge
operating instructions.
5. Adjust the circuit setter valve by turning the valve
stem until the appropriate pressure drop is
achieved.
6. After achieving the proper setting, slightly loosen the two soc
ket head cap screws and rotate
the memory stop around until it touches the back side of the indicator. Then tighten the screws
to securely set the open memory position. The memory stop indicates the last set open
position.
7. If using a three-way valve: close the contr
ol valve to the coil, with the differential pressure meter
still connected. This will divert flow to the bypass side of a three-way valve.
Adjust the balancing fitting to obtain the
same pressure drop across the circuit setter valve as in
step two when the control valve was open to the coil.
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