Wiring A Cascaded System - Westinghouse Premium WGRT 199 Series Installation, Start-Up, Maintenance, Parts, Warranty

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C. Wiring a Cascaded System
When wiring the water heater for Cascade operation, select one
as the Master water heater. The remaining water heaters will be
designated Followers. See "Setting Up a Cascade System" for more
details.
1. Connect the five pin connectors of the cascade communication
cables to the control board of every unit. See Figures 35 and 36.
2. Connect the two pin male connector from the cascade
communication cable of the first unit in the system to the open two
pin female harness on the next unit in the system. Continue this for
each unit in the system.
Master
Figure 35 - Cascade Wiring Example
NOTE: The maximum distance between units is two and a half
feet. See Figure 38. This maximum distance can be increased by
connecting additional wire harnesses together. However, the
number of units that can be cascaded will be reduced by one for
every additional harness used.
3. Add a resistor to the cascade communication cable of the last unit.
See Figure 37.
NOTE: Every cable comes with one resistor. Use only one resistor on
the cascaded system. Discard the rest.
NOTE: After the cascaded system is set, if you manually turn off the
Cascade Master at the display the entire system will shut down.
NOTE: After the cascaded system is set, DO NOT turn off a Cascade
Follower at the display until you disconnect the cascade cable.
A maximum of eighteen (18) 199 models may be installed in a
cascaded system. A maximum of four (4) 150 models may be
installed in a cascaded system. Installing more than the maximum
amount of water heaters in a cascaded system will result in system
problems, property damage, and premature water heater failure.
Such problems ARE NOT covered by product warranty.
whl-004 Rev. 000 Rel. 013 Date 5.1.18
When installing a cascaded system, it is important that the water
heaters are the same model.
Failure to follow these instructions will result in improper system
operation, wasted time, money, and possible property damage
and personal injury. Such damages ARE NOT covered by product
warranty.
Follower
Figure 36 - Cable Wired to Board
Figure 38 - Maximum Distance Between Wired Cascaded Units
Figure 37 - Installed Resistor