Water Heater User Manual

1 Service
22
Cascade Parameters Screen:
Cascade Operation
When multiple water heaters are installed, they can be wired
together in a cascade sequence. A maximum of eight (8)
heaters can be controlled from a single control. In this
application one heater would be designated as the Leader and
all others would be designated as Members. The designated
Leader water heater determines the total output needed from
the group based on the set point and the tank sensor reading.
Reference the Wiring of the Cascade section in the Armor
X2 Installation and Operation Manual for more information
regarding the cascade feature.
The Cascade Screen allows access to four (4) parameters.
Those parameters are as follows:
• Cascade Address - The heater designated as the Leader
should be programmed with address 0-1. All Member
heaters require addresses from 2-3 through 14-15. The
address must be different for each member. The
addresses can be in any order, regardless of the order in
which the water heaters are wired together. This
parameter can only be changed by the installer. The
default address is 0-1.
• Cascade Off Differential - Sets how many degrees above
set point the temperature has to go before the lead water
heater will shut off. This parameter can only be changed
by the installer. The temperature range of this parameter
is 0° to 72°F. The default value is 10°F.
• Cascade Off/On Differential - Sets how many degrees
below the turn off temperature (set point + Cascade Off
Differential) the temperature has to go before the lead
water heater will turn on. This parameter can only be
changed by the installer. The temperature range of this
parameter is 0° to 72°F. The default value is 20°F.
• Maximum Outlet Temperature - Sets the set point that
individual heater will attempt to achieve in a cascade.
When a heater is commanded to fire by the Leader, it will
attempt to achieve this temperature at its outlet. The
Leader will control the modulation of the last heater to fire
in order to hold the temperature at the tank
sensor to the user set point. If any of the water heater
outlet temperatures reach the Maximum Outlet
Temperature setting, the water heater will then modulate
down on its own in order to keep its outlet temperature
within the Maximum Outlet Temperature setting.
Therefore, this parameter can be used to limit the
outlet temperatures of all the heaters in a cascade.
Reference page 17 for information regarding changing
parameters.
Time - The time is displayed in the upper right-hand corner of
the display. It is displayed in a 24 hour format. Reference the
night setback parameters on page 21 for information regarding
adjusting the date and time.
Back button - Pressing this button will back the screen up to the
previous screen.
Service Manual