Excessive Discharge From Safety Devices; Gas Boosters; Hydrogen Gas; Water Temperature - Rinnai Enduro XL SP250B Operation & Installation Manual

Never block the outlet of the PTR valve or its drain line for any reason. The easing gear must be
operated at least every 6 months to remove lime deposits and verify that it is not blocked. Failure
to do this may result in the water heater failing.
WARNING
If the valve does not discharge water when the easing gear lever is opened, or does not seal again
when the easing gear is closed, attendance by an authorised person must be arranged without
delay. The PTR valve is not serviceable.

EXCESSIVE DISCHARGE FROM SAFETY DEVICES

Pressure & Temperature Relief (PTR) Valve
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 bucket of water during a 24 hour period or discharges continuously there may be
another problem.
If the valve dribbles continuously, try easing the valve gear for a few seconds as described above. This may
dislodge any foreign matter and alleviate the problem.
If the valve discharges at high flows, especially at night, it may be as a result of the water pressure exceeding the
design pressure of the water heater. Ask your installer to fit a Pressure Limiting Valve (PLV).
NEVERreplacethePTRvalvewithonewhichhasahigherpressureratingthanisspecifiedfor
your water heater.
WARNING
Expansion Control Valve (ECV) - if fitted
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 bucket of water during a 24 hour period or discharges continuously there may be
another problem.
If the valve leaks continuously, try easing the valve gear for a few seconds. This may dislodge any foreign matter
and alleviate the problem. If this does not alleviate the problem contact Rinnai.
Operate the easing gear regularly to remove any lime deposits and to verify that it is not blocked.

GAS BOOSTERS

• Do not touch the flue outlet or do not insert any objects into the flue outlet.
• Keep flammable materials, spray cans, fuel containers, trees, shrubs and pool chemicals etc, well clear of
the flue outlet.
• Do not use the gas types other than those designated on the data plate. For example, do not use Propane/
Butane gas mixtures on appliances marked Propane Gas.
• Do not use Propane Gas on appliances marked as Natural Gas and vice versa.

HYDROGEN GAS

If the hot water unit is not used for two weeks or more, a quantity of hydrogen gas, which is highly flammable,
may accumulate in the water heater. To dissipate this safely, it is recommended that a non electrically operated
hot tap be turned on for two minutes at a sink, basin, or bath, but not a dishwasher or other appliance. During
this procedure there must be no smoking, open flame or any electrical appliance operating nearby. If hydrogen is
discharged through the tap, it will probably make a sound like air escaping.

WATER TEMPERATURE

The solar control unit and pump circulate water between the solar collectors and the storage cylinder until the
water at the base of the cylinder is 65°C. Under these conditions water at the top of the tank may exceed 85°C.
During periods of low solar gain, supplementary heating occurs.
To meet Australian regulatory requirements, supplementary heating must be operational.
IMPORTANT
Rinnai
WARNINGS AND IMPORTANT INFORMATION
7 Low Profile Roof Mounted OIM