25
MAINTENANCE AND SERVICE
The manufacturer recommends having the unit checked once a year or as necessary by a licensed technician. If
repairs are needed, any repairs should be done by a licensed technician.
UNIT DRAINING and FILTER CLEANING
WARNING
Turn o
ff
the electrical power supply and close the manual gas shuto
ff
valve
and the manual water control valve before servicing.
• Clean the
filter (Strainer) on the system.
• Be sure that all openings for combus
tion
and ven
til
a
tion
air are not blocked.
• The ven
ting
system should be checked annually for any leaks, corrosion, blockages or damage.
• The burner should be checked annually for dust, lint, grease or dirt.
• Keep the area around the water heater and termina
tions
clear. Remove any combus
tible
materials, gasoline,
flammable
vapors, and liquids.
• In accordance with all local codes and common safety pr
actices,
water discharged from the pressure relief valve
can cause severe burns instantly from scalding. DO NOT touch the pressure relief valve.
• If the 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
tion.
• Visual check of burner
flames
(see
belo
w)
through the burner window in the burner assembly located at the
middle of the water heater.
6.
7.
1.
Close the manual gas shuto
ff
valve.
2.
Turn o
ff
power to the unit and wait a couple of seconds. Turn
on again.
3.
Wait 30 seconds, and then turn o
ff
power to the unit.
4.
Close the
inlet
water shuto
ff
valve.
5.
Open all hot water taps in the
house. (When using Radiant
S y s t e m w i t h D H W .
When the residual water
fl
ow has
ceased, close all hot water tap
s.)
H
ave a bucket or pan to catch the water from the unit’s drain
plugs. If Isola
tion
valves are installed, open the drains to
drain the water. If isola
tion
valves are not installed,
unscrew
the two drain plugs
(la
rge and
small)
to drain the water out
of the unit. Do not lose the o-rings that will be on the two
drain plugs.
Wait a few minutes to ensure all water has completely
drained from the unit.
8. Clean the
fil
ter
: Check the
filter (strainer) located on the
9.
Secu
rely screw the drain plugs back into place.
Hand-
tig
hten only
.
above the
burner
Red or Yellow
Inlet
water valve
Drain plug
(Small)
Outlet
water valve
Drain plug with Filt
er (La
rg
e)
DHW panel or plumbing that was installed and clean filter.
Содержание Smart 115 PLUS
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