EB-NB Installation Manual

12/28/2018 27 BI804
Startup Inspection
Comment – the words “power service” or “power source” refer to the 480/208/240 3-phase source
dedicated to the electric elements.
1. All main unit staging CB’s should be off. The dead front inside panel is still probably off; this is
okay because the installer needs to check the source voltage. The panel interlock switch is open thus
contactors cannot pull in.
2. Verify the control box 120 CB is off and R to W input is open or off.
3. Verify previous Pre-Start and Setup section and the above Operations section have been completed
and have the necessary the familiarity to proceed.
4. Verify main unit and control box are free of construction debris, dust and moisture, proper electrical
connections, connection terminals are properly tightened, etc.
5. Remove one main unit top cover panel and verify the vessel top is free of debris and all electric
element connections are in place with no foreign material which may cause an electrical short.
Secure top cover to make sure the top of the vessel remains safe and clean.
6. Verify system is water solution filled, flushed, purged, free of air, and at 10-20 psig.
7. Be prepared to activate the power service source.
8. Turn on the control box upper left 120 control source CB. If installed a Bender alarm should be
active indicating no power service source.
9. Turn on the power service main disconnect source (208/240/480).
CAUTION
THE INDIVIDUAL STAGING CB’S DO NOT REMOVE ALL 480V POWER FROM INSIDE THE
BOILER. THE TOP DISTRIBUTION BLOCK AND WIRING FROM THAT DISTRIBUTION
BLOCK BECOMES LIVE AS SOON AS THE MAIN DISCONNECT IS CLOSED.
10. Using a volt meter, verify service power phase to phase voltage.
11. Install the main unit inside dead front panel. This should close the safety interlock switch (upper left)
allowing the contactors to activate as required in the next steps.
12. Close the external thermostat type R to W device. One minute delay, pump relay closes first.
13. Verify pump is on and water flow circulation.
14. The unit should begin staging elements in order to satisfy system desired temperature
 Staging is verified by the behind the door staging monitor lights next to each staging CB
 Main unit CB’s are still off
15. Turn on one inside staging breaker at a time. The power source current should increase as the stages
step in. All stages relating to the specific model number should now be on.
 If not, review the setup “maximum stages” entry and/or the sequencer chip code dash number.
 Also, the next section has further information.
16. Open the external R to W contact.
17. The system should be ready for a thermostat call (R to W).