IMPORTANT NOTE:

Before disconnection of utility power to work on transfer switch control be sure to call the fire alarm service company or fire department to have them ignore building trouble alarms for the duration of the repair.   Repair should be completed in 1 day or less so that the building is not without an alarm system overnight. The alarm is intended to alert for fire but also serves as an indicator of loss of power to the sump pumps and other critical equipment.  As soon as the repair is done call to restore alarm service. 

s

           Alarm Service _______________   or  911

           CAE PIN #         _______________

Definitions:

        ES -    Engine Start Agastat Model 7022AK 1-300 Second Time              Delay off  (Delays engine start for Power Loss)  Set at 8                seconds.

        NE -   Time delay on relay for Normal (utility) to Emergency                        power.  Set at 26 seconds after Power Loss.

           EN-    Time delay on relay for Emergency to Normal (utility)                        power.  Set at 10 seconds.

EC-     Time delay on relay for Engine Cutoff after Normal power is restored.  Set at 30 seconds NOTE:  EC DELAY MUST BE LONGER THAN EN.


I. Logic for Loss Of Utility Power

 

Time 0+

               Green Light  out

 

EN  Drops out immediately

      EN1 Opens isolating  N

       EN2 Closes & Enables  NETD on

 

N Relay Drops Out Immediately

N1-2  Breaks Transfer Switch Connection With Utility

N3      Closes Enabling E

N4      Opens - isolating     ECTD on

 

EC Relay Drops Out Immediately

EC1 opens isolates ESTD off   

 

Time 0 + 8 seconds after loss of utility power

ES Relay Drops     

ES1 Times closed & Starts Engine

After Generator Voltage Up

       Red Light On

Time 0 + 8  + 18 = 26 seconds after loss of utility power

NE Relay Picks Up (after 18 Seconds time delay on)

NE1 Closes Energizing E

NE2 Opens  Isolating  N & ES   (same as Test Switch)

 

E Relay Picks Up

E1 & E2  Load on Contractor

               E Relay Contact ____ closes indicating to Sensaphone that the generator has started.  (it would be better to indicate loss of utility power which could be indicated by spare Agastat contacts)

II. Logic for Utility Power Back on

 

Time 0+

               Green Light On

Time 0 + 10 seconds after restore of utility power

EN Picks Up (10 Seconds)

EN2 Drops E & NE

EN1 completes high side of N

EN2 Drops E thus dropping Emergency Powered Load

E3 Dropping picks up N

N Picks Up and transfers load to Utility

N3 disables  E

 

 

Time 0 + 10 seconds after restore of utility power

   

    EC Timed  on 30 seconds and Cuts off Motor Generator  

       Red Light OFF

III. Logic for Test Switch in Test Position

Time 0+

               Green Light  stays ON

 

N Relay Drops Out Immediately

N1-2  Breaks Transfer Switch Connection With Utility

N3      Closes Enabling E

N4      Opens - drops    ECTD on

 

 

EC Relay Drops Out after N Drops

EC1 opens isolates ESTD off   

 

Time 0 + 8 seconds after loss of utility power

ES Relay Drops      

ES1 Times closed & Starts Engine

After Generator Voltage Up

       Red Light On

Emergency Power will not transfer because ENTD on holds EN2 open          

Time 0 + 8 + 18 seconds after loss of utility power

           NE Relay Picks Up (after 10 Seconds time delay on)

IV. Restoring Test Switch to Auto Position

        N Picks Up immediately

   EC Timed Delay on 30 seconds

    EC1 opened and Cuts Off Generator  

       Red Light OFF


 

CONTACTS

N 1 - 2       NO     Transfer Switch

N 3                NC     E

N 4                NO     EC

ES 1              NC     Starts Engine  (Agastat)

EN 1             NO     N

EN 2             NC     E    &    NE

EC 1              NC     ES

NE 1             NO     E

NE 2             NC     N  &  ES

E 1 - 2          NO     Transfer Switch

E 3                 NC     N