Boiler Valve Timing
Boiler Valve Timing
Information only
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| V | a | l | v | e |
| T | i | m | i | n | g |
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| # | X | : |
| X | X | u |
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| X | X | d |
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| s | e | c | . |
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u= UP | Boiler Number | Displays in seconds real time opening and closing |
d = DOWN |
| of modulating gas valve from closed (0%) to full open (100%) |
This display shows the time (secs) required for the gas valve to open and close. If "u" display is from 12 to 26 and "d" is less than "u" and between 4 and 18 the gas valve requires no adjustment. This timing is not operator changeable on the screen display.
Proportional Integral
Derivative Operator
Manual Action (PIDOMA)
A.Proportional Integral Derivative
Operator Manual Action
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| A | P | c | o | n | s | t |
| W | a | i | t |
| D | c | o | n | s | t |
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*Pconst is the proportional ratio which causes the boiler to step up or down, faster or slower (over- shoot or undershoot) and finally end up offset from desired tem- perature. Default is 1/3.
*Wait is the time controller waits until it acts on a temperature change. Default value is 5 sec- onds.
*Dconst is the derivative ratio which tells the system how first to react to differing changes in water temperature. Default is 3/1.
*Pconst
Proportional ratio which causes the boiler to step up or down, faster or slower.
*WAIT
Wait as time controller hesitates before acting on a temperature change.
*Dconst
Derivative ratio speeds or slows boiler response compensating for overshoot and undershoot.
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