Save A Service Call - Rinnai SG175 Operation & Installation Manual

Before contacting Rinnai for service, please follow the fault finding guide. If the problem persists or this information
doesn't answer your questions, contact Rinnai on the phone number on the back of this manual
Service call outs attending to any condition or fault that is not related to Rinnai product or components may be
chargeable�
INSUFFICIENTORNOHOTWATER
Excessive hot water
consumption
Incorrect solar system size
Temperatureandpressure
relief valve / expansion
control valve discharging
water continuously
Boosterheatingnot
operatingorinsufficient
gas supply for gas boosted
heating system
Boosterthermostatsettings
Rinnai
ElectricBoostedSystems:
Often people are surprised at the amount of hot water used, especially when
showering� If the amount of hot water used during the day exceeds the storage capacity
of the cylinder, it is likely that there will be insufficient hot water.
GasBoostedSystems:
Insufficient flow may occur if multiple outlets are in use at the same time and exceed
the rated flow capacity of the gas booster. If so, reduce the number of outlets in use.
Consider discussing with your installer, fitting water saving fixtures and/or flow control
or pressure limiting valves to reduce consumption�
The system may not have been adequately sized to suit the household.
PTRValves&ECVValves(iffitted)
It is normal and desirable that this valve allows a small quantity of water to be
discharged during the heating cycle� If it discharges more than a standard bucket
of water during a 24 hour period or discharges continuously there may be another
problem�
If water continuously dribbles from the valve, try easing the valve gear for a few
seconds as described in the section 'Maintenance and Regular Care' on page 8�
This may dislodge any foreign matter and alleviate the problem�
If the valve discharges at high flows, contact your installer or Rinnai to discuss.
ElectricBoostedSystems:
Check to ensure the electric isolating switch(es) at the switchboard (usually marked
"hot water" or "water heater") is switched 'ON'�
Check to ensure that the electric fuses for hot water at the switchboard are intact�
On systems using a deluxe controller, ensure the time is set correctly and that the
mid tank sensor (white lead) is in place� (See controller manual for information about
electric element operation�
GasBoostedSystems:
Check to ensure the power cord of the gas booster is plugged in and switched 'on'�
Check gas is available and the isolation valve is opened�
Close the hot tap and wait for 10 seconds and open it again� The hot tap must be
opened enough to ensure that the flow rate is sufficient to light the gas booster.
Check if there is gas supply to other appliances in the rest of the house�
ElectricBoostedSystems:
Check the temperature of hot water delivered with a thermometer placed under the
closest outlet (usually the kitchen sink) on a non-tempered hot water line�
This test should be done early in the morning after overnight electrical boosting before
any hot water is used� The temperature of the water delivered should be at least 55°C
(allowing for heat losses in pipe work)�
If this is not the case, the temperature may need to be increased� Contact your installer
or Rinnai to discuss adjusting the thermostat�
9

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