Walchem WCT400 Series Instruction Manual

Walchem WCT400 Series Instruction Manual Manual pdf 24 page image

215.5 Feed MenuThe Feed Menu adapts to the selected Feed output mode.Hint: For easiest programming, program Feed Mode first, then step through the rest of the feedparameters. The modes are defined as follows:A Bleed and Feed with OptionalLockoutBleed and Feed Mode turns the Feed output On and Off at the same time as the Bleed output.The lockout setting determines the maximum allowable time for the Feed output. If this time isexceeded the Feed output is turned off and Locked out until the Bleed output turns off.B Feed % of Bleed Feed % of Bleed Mode tracks the length of time that the Bleed output is on. When the bleedturns off the feed output is energized for a user defined proportion of the bleed time.C Feed % of Time Feed % of Time Mode turns on the Feed output for a user definable % of a timed cycle. Thetime cycle length is adjustable from 10 to 60 minutes.D Feed based on Water ContactorInputFeed based on Water Contactor Input Mode turns on the Feed output for a user definable timeeach time a water contactor pulse is detected. This contactor input can be divided toaccommodate a large variety of water meters. Contacts will accumulate feed time so that allcontacts are accounted for.E Feed based on Paddlewheel InputModeTurns on the Feed output for a user definable time each time a defined volume of flow isdetected. This paddlewheel input has a programmable K Factor to work with a large variety ofHall Effect (square wave, not sine wave) flow meters.The Feed menu will be indicated on the display by one of the following: (The 'A' indicates that thefeed is being controlled automatically.)Feed A OFF Indicates that the Feed output is currently OFF.Feed A 10:00 Indicates the length of time that the Feed output has been ON or the length of time that theFeed output will be ON.Feed A NO FLOW Indicates that Feed control has been suspended because there is presently no flow past the flowswitch.Feed A TIMEOUT Indicates that the feed lockout timer in the Bleed and Feed mode has expired.Feed A LOCKOUT Indicates that the output is currently locked out due to a biocide add or biocide lockout.Bleed and FeedModeLockoutSet this for the Feed Lockout Time. The lockout time is the maximum length of time that the feed outputcan be on. If the lockout time is set to 0:00, the lockout timer is no longer used and the feed output will beon for as long as the bleed is on.Feed % of BleedMode% of BleedThis is the % value that is multiplied times the accumulated bleed time to determine how long the feed willbe. For example, if the bleed was on for 10 minutes and this setting was 50%, the feed output would be onfor 5 minutes.Max TimeThis is similar to the lockout time above in that the feed output will not exceed this maximum length.Feed % of TimeMode% of TimeThis is the % value that is multiplied times the cycle length to determine the length of time that the feedoutput is ON. If the cycle length were 10 minutes and this setting was 40%, the feed output would be on for4 minutes, then off for 6 minutes and then repeat the cycle.Cycle TimeThis determines the length of the cycle to be used.