Heat Transfer MODCON VWH 300 LP Installation & Maintenance page 18

PART 5: BOILER PIPING
5. Feed Green Ground Wire into Boiler through
the wire access:
6. From the front of the boiler, feed the ground
wire Up into the control box:
7. Once into the control box, attached the green
ground to the ground bus connection
available:
17
GAS-FIRED HOT WATER SUPPLY BOILER
(CONTINUED)
8. Connect wire harness to the red wire
connection on the flow switch:
9. Now that the installation is complete, power
up the boiler and use the control to access
the Installer Parameter #20 and change the
default value to 2 (See Mod Con Installation
Manual Part 11 – Program Navigation). When
done, create a demand and observe the
boiler's function to verfiy the installation is
working proeprly.
*Please note that these illustrations are meant
to show system piping concept only, the
installer is responsible for all equipment and
detailing required by local codes.
Boiler Manual