Digital Controller Operation - Keltech CNA-36 Installation Manual

CNA-Series Tankless Heater
6

Digital Controller Operation

The preprogrammed digital controller is mounted through the bezel on the enclosure door. The digital
controller will be powered but the bottom display will read OFF until water is flowing through the heater.
The bottom display will then display the setpoint temperature (See Digital Controller Operation section for
more information).
Description
EZ Key
Setpoint Up Button
Setpoint Down Button
Infinity Key
Advance Key
Output Indicators (1-5)
Setpoint Temperature
(Lower Display)
Output Temperature
(Upper Display)
Layout Diagram
EZ Key
Infinity Key Advance Key
10
Upper Display Lower Display
Auto, Man, Off
XX .X%
no
C or F
ON - Heating
Output Indicators
1
2
Output Temp .
3
4
Setpoint Temp .
5
Setpoint Up
Setpoint Down
7/13/2015
Function
Toggles output on/off
Increases output temperature
Decreases output temperature
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Advances through parameter prompts
C .r71 Turns Control Loop On/Manual/Off
h .Pr1 Heater Power %
AUt1 Autotune (Contact Factory)
C_F1 Change Temperature Units from F to C
Output 1,2,3,4 or 5 are active and operating if
these LEDs are illuminated .
Displays:
• Setpoint
• Percent Power
• Temperature units F or C
• Menu prompt name
• Alarm code
Displays:
• Actual process temp . of outgoing water
• Prompt parameter value
• Error code (feature disabled)
1
Output
2
Temp .
3
Setpoint
4
Temp .
5
OFF - No Flow
Keltech • 215-1814 Rev. C; ECN 150010
Installation
1
Output
2
Temp .
3
4
No Flow
5