Keltech CNA-36 Installation Manual page 20

CNA-Series Tankless Heater
Special Installation Maintenance
Routine Maintenance of the System (Every 6 months)
Recommended maintenance of the systems is as follows:
Repeat Commissioning test at least every six months . The test includes checking the opening pressure of the Relief
Valve, setting of the Minimum Pressure Sensor, the "Normal Working Pressure" of the enclosure . Test that the interlock
and alarms function correctly .
Check the Relief Valve and any other Spark Arrestors . Remove any debris or corrosion, or replace the Spark Arrestor .
Check the condition of the air supply filter element . Clean or replace it as necessary .
Periodic Maintenance (Every 18-24 months)
At least every two years, the following additional checks are recommended:
Apparatus (Heater, Purge Systems, Alarms etc .) is suitable for the Hazardous Location .
There are not unauthorized modifications .
The source of air is uncontaminated .
The interlock and alarms function correctly .
Approval labels are legible and undamaged .
Adequate spare parts are carried .
The action of pressure failure is correct .
20 7/13/2015
Keltech • 215-1814 Rev. C; ECN 150010
Installation