Crown Boiler PHNTM399, Installation And Operating Instructions Manual

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61
G. Multiple Boiler Operating Information
(continued)
Step Description Comments
1
Install and wire the Header
Sensor
Wire the header sensor to low voltage terminal strip terminals “Header sensor”.
NOTE
This step can not be skipped. The Sequence Master can not be “enabled” unless a Header
Sensor is installed.
2
Install Ethernet Cables
between boilers
Standard Ethernet type cables with RJ45 connectors are “plugged in” to the Boiler-to-Boiler
Communication Network connection located on the side of the boiler. When more than two
boilers are connected an RJ45 splitter may be used to connect the boilers. Refer to Figure
31.
3 Apply Power to All Boilers
4
Set Unique Boiler
Addresses
Assign all boilers a unique Boiler Address using any number from 1 through 8.
WARNING
When two boiler’s addresses are the same undesirable simultaneous operation occurs.
5 Enable 1 Boiler Master
Enable only one R7910 Control’s Sequencer Master.
WARNING
When more than one Sequencer Master is enable erratic behavior will result.
6 Power Down All Boilers
7
Power Up Master
Sequencer
“Enabled” Boiler First
8 Power Up Other Boilers
9 Confirm Communication
From the Home Screen of the R7910 Control with the Master Sequencer “enabled”, select
the Status button. The Sequencer display shows the boiler address of the communicating
boilers. Additionally, from the “Home” screen select the “Detail” button and then the
“Networked Boilers” buttons to view boiler communication status.
If a boiler is not shown, check Ethernet cable connections and confirm all boilers have unique
addresses.
1. Required Equipment and Setup (continued)
d. Multiple Boiler Setup
Figure 31: RJ45 Splitter Installation Detail
VIII. Electrical
(continued)