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Version 1.0Aug 2018
After the water heater is installed, the appliance and its gas connection, including factory connections, MUST be
leak‐tested at normal operating pressure.
Warning!
NEVER use an open flame to test for gas leak!
Turn on the gas service valve.
Use soapy water to test for leakage at all gas connections and fittings. If bubbles are seen, it indicates there
is a leak and MUST be rectified – see Figure 17.
High Altitude Installation
The water heater is suitable for installation up to 2000ft (600m) above sea level. The input rating of this water
heater is based on sea level operation. At higher elevations, the actual input rate may be lower than the value listed
in product data label.
For installation above 2000ft (600m) elevation, contact a qualified service technician to make proper altitude
adjustments.
Warning!
Do NOT install the water heater at elevations above 2000ft (600m). Please contact ONSEN customer service for
future advice.
Hot and Cold Supply Line Insulation
Suitable pipe insulation and/or electric heat‐tracing should be used to prevent water in the pipes from freezing.
If water in the piping is frozen, the water heater will malfunction.
Both Hot and Cold water lines should be insulated for protection in areas prone to freezing conditions – see Figure
18.
Figure17
Figure 18
