9
Installation
SNA-Series Tankless Heater
Keltech •
215-1815 Rev. B; ECN 130011
10/17/2014
Digital Controller Operation
6
The preprogrammed digital controller is mounted through the bezel on the enclosure door. The digital
controller will not be powered 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
Upper Display
Lower Display
Function
EZ Key
Toggles output on/off (Disabled on SNA Models)
Setpoint Up Button
Increases output temperature (Disabled on SNA
Models)
Setpoint Down Button
Decreases output temperature (Disabled on
SNA Models)
Infinity Key
Back to Home page
Advance Key
Advances through parameter prompts
Auto, Man, Off
C .r71
Turns Control Loop On/Manual/Off (Disabled on
SNA Models)
XX .X%
h .Pr1
Heater Power % (Disabled on SNA Models)
no
AUt1
Autotune (Contact Factory) (Disabled on SNA
Models)
C or F
C_F1
Change Temperature Units from F to C
Output Indicators (1-5)
Output 1,2,3,4 or 5 are active and operating if
these LEDs are illuminated .
Setpoint Temperature
(Lower Display)
In Green
Displays:
• Setpoint
• Percent Power
• Temperature units F or C
• Menu prompt name
• Alarm code
Output Temperature
(Upper Display)
In Red
Displays:
• Actual process temp . of outgoing water
• Prompt parameter value
• Error code (feature disabled)
TABLE 2
Output Indicators
Output Temp .
Output
Temp .
Blank
Setpoint
Temp .
Setpoint Temp .
Setpoint Up
Setpoint Down
Advance Key
Infinity Key
EZ Key
FIGURE 3
Layout Diagram
FIGURE 4
ON - Heating
FIGURE 5
OFF - No Flow
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
