31
Note: To check uN•Lime for continued use, place some scale
or white chalk in a glass with a small amount of uN•Lime. if
the material is vigorously dissolved by the uN•Lime, it can be
reused; if not, the uN•Lime should be replaced.
figure 28.
ignition module system
Before calling your service agent, th e following checklist should
be examined to eliminate obvious problems from those requiring
replacement or servicing.
• Check that “main manual gas shutoff valve” is fully open and
that gas service has not been interrupted.
• Check that after following the applian ce oPeR ATiNG
iNSTRuCTioNS, the “Top Knob” of the appliance gas valve
is in “oN” position.
• Check electric al supply to the appliance for possible blown
(or tripped) fusing or power interrupti on. Also check the 3
amp fuse on the front of the digital thermostat (fig. 2).
• is the water temperature in tank below the th ermostat dial
setting on the appliance thermostat (calling for heat)?
• it is possible that the high limit (e.C.o.) has func tioned to
shut off th e appliance. S ee High Limit page 7 - High Limit
Switch for reset procedure. Contact your service agent if
limit continues to function to shut off appliance.
system diagnostics
Your water heater is equipped wit h an i gnition module that
incorporates a diagnostic system to assist in troubleshooting
the appliance. The indicator codes on the ignition module are
as follows:
TABLe 11:
1 FlasH System lockout (retries or cycles exceeded)
2 FlasHEs Pressure switch stuck close
3 FlasHEs Pressure switch stuck open
4 FlasHEs open on high temperature limit switch (eco)
6 FlasHEs 115 volt AC power reversed (check polarity)
7 FlasHEs Low ame sense signal (make sure ame sensor is in
burner ame)
8 FlasHEs Check igniter
continuous ash -> conti nuous ame sensed > 5 seconds
without gas valve
continuous on -> internal control failure - replace ignition control module
.
use this diagnostic system in conjunction with “oPeR ATioNAL
CHeCKLiST” and the “SequeNCe of oPeRATioN” to
troubleshoot the appliance.
8. Remove the c leanout cover and place a clean plast ic bucket
next to the cleanout opening.
Partially open the cold water inlet valve to al low ti me to
accomplish the following and then close the valve.
While the water is being run thro ugh the tank, insert a
stiff wire, c opper tube at tened at one end or an opened
wire coat hanger through the cleanout opening and
scrape out any loose deposits of scale or sediment. This
is an economical way to avoid unnecessary usage of the
deliming solution.
Repeat the opening and clos ing of the cold water inl et valve
as necessary but be sure the heater is completely drained
when ready to introduce the uN•Lime.
upon completion, reinstall the clean out cover and use a new
cleanout cover gasket (part number 900409 9215).
Remove the drain valve.
9. install the long plastic male adapter insert tting into the drain
valve opening of heater after applying Teon tape or paste to
threads. Tighten rmly by hand and use wrench or adjustable
pliers to check for sec ure connection. Do not over tighten to
avoid damage to threads and ttings.
Prepare the up-N-Down Transfer Kit
The next step is the preparation on the up-N-Down Transfer Kit,
if you have not already done so:
1. With the 5 gallon up- N-Down container in the vertical
position, unscrew the plastic vent cap in the handle and
pierce the plastic membr ane over the vent boss under the
cap to allow the container to vent.
note: if your container does not have the vent cap and vent
boss, dr ill a 3/16 ” hole in th e handl e. When you have nish ed
deliming you will be able to plug th is drilled vent with the
stainless steel screw that is supplied with the kit.
2. Remove the container ’s cap and cut the plastic me mbrane
located in the 3/4” iPT opening in the cap. Take care to not
damage the threads.
3. find the 3/4” male adapter, apply teon tape to the th readed
end and screw it into the 3/4” iPT opening in the cap.
4. Put cap with male adapter back on th e container and slide
3/4” hose over end of male adapter and fasten in place using
hose clamp provided.
Delime using flo-Jug method
5. Slide the hose clam p over end of hose and slide hose over
the male adapter in the water heater drain opening and
secure in place using hose clamp.
6. Lift container to the “Pour ” Position, see figure 28 , being
careful to keep t he vent in the handle above the liquid level
and pour the uN•Lime into the heater.
7. Lower container, you may have to place the c ontainer on its
empty carton to prevent the uN•Lime from owing back into
the container.
8. Let uN•Lime remain in the heater for 5 minute s and then
lower the container to the “Drain” Position, see figure 28.
9. Deliming activ ity is indicated by foaming on the surface of the
uN•Lime. if there is deliming activity, repeat steps 6 thr u 8.
Normally, lime removal will be completed within one hour.
Severe build-up of lime may take longer than an hour to complete
descaling.