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Mascot ST Tankless Water Heater
Section 8 – Maintenance
Regular Maintenance
After Water Heater installation is completed, this
manual should be placed in safe dry location near
the water heater. Maintenance instructions should be
carried out by these guidelines annually by a qualified
technician.
Maintenance details, please refer to the instructions
below.
Periodically
Monthly
Every 6 Months
No plan for long-
term use.
Maintenance procedures [ Periodically ]
- Check installation location
T o prevent potential severe personal injury,
death or substantial property damage, remove all
contaminated materials.
If contaminants are found :
Remove products immediately from the area.
In order to check the status of Water Heater, call
a qualified service technician to inspect the Water
Heater for possible damage from acid corrosion.
- Check if WATER HEATER casing is closed.
Check if there is any problem with the Water Heater
casing and the two upper and lower screws are
tightened well. Water Heater casing must be closed
while it is running.
WARNING
DO NOT store combustible materials, gasoline
or any other flammable vapors or liquids near
the Water Heater. Remove them immediately or
store them other places.
Please check installation location.
Please check if water heater casing is
closed.
Please check power source.
Please check vent pipe.
Please check air inlet pipe.
Please check relief valve.
Please check condensate outlet.
Please check water heater piping
(gas and water)
Please check operate relief valve
Do not shut Water Heater down.
8.1 Annual Startup and General Maintenance
Maintenance procedures [ Periodically ]
- Check power source.
Make sure that the power cord is correctly connected.
The main power line is connected to the manual
switch box inside the Water Heater.
- Check status of the control panel.
Check status of the power supply. Please check for
any debris on the button.
Maintenance procedures [Monthly]
- Check vent pipe.
Visually inspect the flue gas vent piping for detecting
any signs of blockage, leakage or deterioration of the
piping. Please contact a qualified service technician
immediately if you find any problem.
- Check air inlet pipe.
Visually inspect the air inlet to be sure it is
unobstructed. Inspect entire length of air piping for
ensuring that piping is intact and all joints are properly
sealed. Call your qualified service technician if you
notice any problems.
- Check relief valve.
Inspect the Water Heater relief valve and the relief
valve discharge pipe for any signs of weeping or
leakage. If the relief valve often weeps, immediately
contact your qualified service technician for inspecting
the Water Heater and system.
- Check the condensate outlet.
While the Water Heater is running, check the
discharge end of the condensate drain tubing.
Make sure that no flue gas is escaping from the
condensate drain tubing.
If flue gas is continuously escaping, it is a serious
problem. Call your qualified service technician for
inspecting the Water Heater and condensate line.
Also, refill the condensate trap if problem persists
regularly.
- Visually inspect the vent terminal rodent screen.
If clogged with debris, clean the screens or replace it
with spare parts.
Page 55
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