CleaverBrooks ADAC 1000, Operation Manual

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Chapter 3 — Commissioning
3-22 Part No. 750-386
3.14.3 - Pump Control - Pump Lead Lag Invalid
Pump Lead Lag Invalid mode is indicated on the HMI when an
invalid pump lead lag sequence is entered.
• Manually changing the lead lag order will momentarily render the
lead lag sequence invalid and will disable pump lead lag
• When Lead Lag is invalid pumps that are running remain running
and pump that are stopped remain stopped.
• Start/Stop push buttons become active to manually start and stop
pumps.
To change the Lead Lag Order the operator must press the Lead Lag
Selection buttons to scroll through the selections.
When operator enters a valid lead lag order the Lead Lag enable
button will become visible and operator can enable Lead Lag if
desired.
3.14.4 - Pump Control - One Pump per Boiler
One Pump per Boiler control is strictly an On/Off control scheme.
• All Pumps are designated as Lead Pumps
• In Auto mode, pump On/Off is based solely on a “Water Required”
discrete input to the ADAC PLC for that particular boiler.
• The Lead pump only runs if Water Required Signal is ON .
There are no Start/Stop push buttons on the HMI. Manual pump
start/stop is by use of the Hand – Off – Auto selector switch located
on the enclosure. In Hand mode the pump is commanded to run.
Figure 3-20 One Pump per Boiler