A.O. Smith THR-160, Инструкция по установке и руководство по эксплуатации и уходу

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54 • Residen al Gas Tankless Water Heater Use and Care Guide
MAINTENANCE
Regular Maintenance
WARNING! Turn OFF the
electrical power supply and close
the manual gas shut-o
ff valve and
the manual water control valve
before servicing. Failure to do so
could result in serious personal
injury or death.
Rou ne maintenance will help your
water heater last longer and work
be er. If you cannot perform these
rou ne maintenance tasks yourself,
contact a quali
fi ed person:
The manufacturer recommends
having the unit checked once a
year or as necessary by a licensed
technician or quali
fi ed person. If
repairs are needed, any repairs
should be done by a licensed
technician.
• Clean the cold-water/inlet fi lter.
• The intake and ven ng system
should be checked annually for
any leaks, corrosion, blockages, or
damage. Replace any damaged
sec on of ven ng and clear any
blockage.
• Keep the area around the water
heater and termina ons clear. Reg-
ularly ensure that the area around
the water heater, vent termina on,
and air intake is free from dust,
debris, and other contaminants.
Remove any combus ble materi-
als, gasoline,
fl ammable vapors,
and liquids.
• If the pressure relief valve
discharges periodically, it may
be due to thermal expansion in
a closed water supply system.
Contact the water supplier or local
plumbing inspector on how to
correct this situa on.
• The pressure relief valve must be
manually operated periodically to
check for correct opera on. Before
opera ng the valve manually,
check that it will discharge in a
place for secure disposal.
• The condensate drain system
must be inspected regularly that it
drains properly in accordance with
local codes or the manufacturer’s
instruc ons.
• The screen on the rain protec on
tray should be inspected annually
and cleaned if needed.
Rain
Protection
Tray
Figure 42 - Rain Protec on tray
Freeze Protec on System
This unit comes equipped with
hea ng blocks and will auto-
fi re to
protect it from damage associated
with freezing. The auto-
fi re mode
ac vates the burner for a short
period of me.
For this freeze protec on system to
operate, there has to be electrical
power to the unit. Damage to the
heat exchanger caused by freezing
temperatures due to power loss is
not covered under the warranty. In
cases where power losses can occur,
consider the use of a backup power
supply.
It is the installer’s responsibility
to be aware of freezing issues and
take all preventa ve measures. The
manufacturer will not be responsible
for any damage to the heat
exchanger as a result of freezing.
NOTICE: Only pipes within the
water heater are protected by the
freeze protec on system. Any water
pipes (hot or cold) located outside
the unit will not be protected.
Properly protect and insulate these
pipes from freezing. See “Available
Accessories” on page 15 for the
Cartridge Freeze Protec on Kit.
This kit is availble for both the X3
®
Models and M Models.
If you will not be using your heater
for a long period of me or power
has been lost during freezing
condi ons:
1
Completely drain the water
out of the unit (see “Unit
Draining & Power Outage
(Freeze Protec on)” on page 55
2
Disconnect power to your
water heater.