Care of unit’s exterior, Lime condition warning signal, Water quality – Rinnai V3237FFU User Manual
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Rinnai Corporation
V3237 Models
O P E R A T I N G I N S T R U C T I O N S
7) Turn the manual valve located at the gas
inlet of appliance counterclockwise
to
“ON”.
8) Turn on all electrical power to the
appliance.
9) Set thermostat to desired setting.
10) If the appliance will not operate,
Follow the instructions “To Turn Off
Gas To Appliance” and call your
service technician or gas supplier.
To Turn Off Gas To Appliance
1) Set the thermostat to lowest setting.
2) Turn off all electric power to the appliance if service is to be performed.
3) Turn the manual valve at gas inlet of appliance clockwise
to “OFF”.
Care of Unit’s Exterior:
Keep the exterior cabinet clean. Use a soft cloth and warm water when cleaning the cabinet.
Do Not use volatile substances such as benzene and thinners, as they may ignite, or cause
fading of the paint.
Lime Condition Warning Signal:
If you notice “LC” flashing on the remote key pad, this means the unit is beginning to lime up,
and MUST be flushed. Contact a Qualified Service Technician to flush the appliance. Failure to
flush the appliance when “LC” is flashing, will cause damage to the heat exchanger. Damage
caused by lime build up is not covered by the unit’s warranty. To reset the LC Fault code, turn
the power off to the unit. Once power is restored, the LC code will be reset.
Water Quality:
Consideration of care for your water heater should include evaluation of water quality. If the
water quality exceeds the target levels provided in the table, you may want to treat or condition
the water.
C A R E & L I M E C O N D I T I O N W A R N I N G
Description
pH
TDS
(Total
Dissolved
Solids)
Total
Hardness
Aluminum Chlorides Copper
Iron
Manganese
Zinc
Maximum
Levels
6.5 to
8.5
Up to
500
mg/L
Up to
200
mg/L
Up