lp-672 Rev. 000 Rel. 002 Date 10.3.18
32
Figure 32 - Wiring Detail
NOTE:
T/T only operates when Air Handler Application is selected in
Installer Menu - 19:SU - AH.
Figure 33 - Cascade Wiring Detail
D. 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.
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.
Figure 34 - Cable Wired to Board
Figure 35 - Installed Resistor
Figure 36 - Title 24 / On Demand Recirculation Wiring Detail
MAX 2.5 FEET
Connect the cascade communication cables to every unit. See
Figure 33. Add resistor to the end of the last follower.
NOTE:
The maximum distance between units is two and a half
feet. See Figure 37. 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.
NOTE:
It is required to protect the cascade communication cable
with a PVC conduit.
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.
Figure 37 - Maximum Distance Between Wired Cascaded Units - NOTE: It is
required to protect the cascade communication cable with a PVC conduit.
