Reliance Water Heaters N71120NE - Manual (Page 31)

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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, the 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 appliance oPerATINg
INSTruCTIoNS, the “Top Knob” of the appliance gas valve
is in “oN” position.
• Check electrical supply to the appliance for possible blown
(or tripped) fusing or power interruption. Also check the 3
amp fuse on the front of the digital thermostat (fig. 2).
• Is the water temperature in tank below the thermostat dial
setting on the appliance thermostat (calling for heat)?
• It is possible that the high limit (e.C.o.) has functioned to
shut off the appliance. See 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 with an ignition 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 flame sense signal (make sure flame sensor is in
burner flame)
8 fLASHeS Check igniter
continuous flash -> continuous flame sensed > 5 seconds
without gas valve
continuous on -> internal control failure - replace ignition control module.
use this diagnostic system in conjunction with “oPerATIoNAL
CHeCKLIST” and the “SequeNCe of oPerATIoN” to
troubleshoot the appliance.
8. remove the cleanout cover and place a clean plastic bucket
next to the cleanout opening.
Partially open the cold water inlet valve to allow time to
accomplish the following and then close the valve.
While the water is being run through the tank, insert a
stiff wire, copper tube flattened 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 closing of the cold water inlet valve
as necessary but be sure the heater is completely drained
when ready to introduce the uN•LIme.
upon completion, reinstall the cleanout cover and use a new
cleanout cover gasket (part number 9004099215).
remove the drain valve.
9. Install the long plastic male adapter insert fitting into the drain
valve opening of heater after applying Teflon tape or paste to
threads. Tighten firmly by hand and use wrench or adjustable
pliers to check for secure connection. Do not over tighten to
avoid damage to threads and fittings.
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 membrane 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, drill a 3/16” hole in the handle. When you have finished
deliming you will be able to plug this drilled vent with the
stainless steel screw that is supplied with the kit.
2. remove the container’s cap and cut the plastic membrane
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 teflon tape to the threaded
end and screw it into the 3/4” IPT opening in the cap.
4. Put cap with male adapter back on the 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 clamp 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 the 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 container on its
empty carton to prevent the uN•LIme from flowing back into
the container.
8. Let uN•LIme remain in the heater for 5 minutes and then
lower the container to the “Drain” Position, see figure 28.
9. Deliming activity is indicated by foaming on the surface of the
uN•LIme. If there is deliming activity, repeat steps 6 thru 8.
Normally, lime removal will be completed within one hour.
Severe build-up of lime may take longer than an hour to complete
descaling.