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CNA-Series Tankless Heater
7
Perform Operational Test No. 1
Ensure the enclosure door is closed prior to
performing operation test.
A
Set the 3-pole switch or circuit breaker to the
ON position .
B
Start the water flow through the heater by
starting the process or fixture this heater is
connected to in order to activate heater .
When flow rate reaches approximately
1 .5 gpm (5 .7 L/Min), the flow sensor
recognizes this condition and begins the
heating process .
When the flow sensor activates:
C
• Green bank energized lights illuminate on the
front bezel verifying power supply connection to
the heating elements via the solid-state relays .
• Element load lights may be solid or flash
in unison as heating elements modulate
depending on the hot water demand .
• Digital temperature controller shows water
temperature . Additional programming is
not necessary .
12
8/1/2021
Press the up or down arrow keys to
D
adjust the set temperature . The controller
displays the temperature of water
measured at the outlet .
Located on the panel are one (36-63kW)
or two (72kW-144kW) green ready lights.
When illuminated, the safety circuit is
engaged and ready for use.
Test water temperature and stability at
E
outlet by viewing the display . Controller
displays (in red) the temperature of water
exiting the heater .
Heater will not energize heating elements if the
inlet water temperature is equal to or greater than
the temperature set on the digital controller.
Installation
Bradley • 215-1814 Rev. G
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