
MSSMD418AE/83371 (1 of 1)
È
Calibrating Chemical Supply Inlets
Every supply inlet to the CBW is equipped with two shut-off valves and a sampling valve, for testing and
maintenance purposes (see figure). When set for normal operation, both shut-off valves should be fully open. Do
not attempt to use these as throttling valves as flow rates should not be adjusted.
The quantity of chemical injected is adjusted by varying the length of time the solenoid valve remains open
(C-Bit On-Time). All supply inlet solenoid valves are controlled by C-Bits and programmed on Display L (Display
L or G beginning with Mark 6 software).
Ë
To calibrate a supply valve:
1. With the CBW stopped, close the shut-off valve to the module and open the sampling valve fully. Be sure the
shut-off valve from the supply source is fully open.
2. Take several sample quantities from the sampling valve in a measuring bucket. This is accomplished by com-
manding the valve ON for various durations, using Display E (see “Calibration and Testing . . .” elsewhere).
Begin with short durations of a few seconds so as not to overflow the bucket.
3. Average these samples to determine the flow rate for the valve. Use the results of this calculation to determine
the On-Time needed for each formula (to inject the quantity recommended by the chemical supplier).
4. Return the shut-off and sampling valves to their normal position.
Î
FIGURE 1
(MSSMD418AE)
Î
Chemical Supply Inlet
98
Содержание 76032
Страница 2: ......
Страница 6: ......
Страница 11: ...Safety and Maintenance 1 7 ...
Страница 27: ......
Страница 29: ......
Страница 43: ...Structural and Drive Components 2 39 ...
Страница 48: ...44 ...
Страница 52: ...BMP910003 91132V Page 1 CBW LOAD CHUTE AND SEAL 48 ...
Страница 56: ...BMP910017 91341V Page 1 CBW ENTRY AND EXIT WATER COLLECTORS 52 ...
Страница 60: ...56 ...
Страница 65: ...61 ...
Страница 69: ...Water and Steam Schematics and Devices 3 65 ...
Страница 80: ...76 ...
Страница 100: ......
Страница 101: ...Chemical Supply Devices 4 97 ...
Страница 103: ...99 ...
Страница 106: ......
Страница 107: ...Control and Sensing Assemblies 5 103 ...
Страница 113: ...109 ...
Страница 114: ...110 ...
Страница 117: ...113 ...