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INSTALLATION MAINTENANCE - GAS BOOSTED SYSTEMS
FILLING THE SYSTEM
Ensure building occupants are warned to stay clear of the solar system
components, building perimeter and roof since hot water or steam may be
discharged from pipes or components.
CAUTION
1.
Ensure the gas supply to the continuous flow water heater is isolated.
2.
Turn on one or more hot water taps at the sink. Open the stop cock in the cold water mains
supply line. The entire system will now be filled with cold water.
3.
Turn off the hot tap at the sink when water flows freely without air bubbles or air bursts. Check
all connections for leakage and tighten if necessary. This applies especially to fittings in
positions not easily assessed such as near the solar collectors. Operate the easing gear of both
the PTR and ECV valves at the storage cylinder to ensure these valves are functional.
If leaks are detected the system must be drained and leaks repaired before the
system is refilled. If this is necessary, temporarily cover the solar collectors with
packaging cardboard or a tarp to prevent them from heating which could result in
CAUTION
steam or hot water being discharged from fittings.
PRE SOLAR HEATING CHECKS
Before commencing solar heating of the water in the system ensure the following actions have been
completed:
Solar Collectors
1.
Are the solar collectors installed with the correct slope and orientation to the sun?
2.
Is the installation finished neatly with the roof made good, all tiles and flashings in place?
3.
Are the bolts tight on the roof framework?
4.
Are all solar collector straps fitted and correctly anchored to the roof structure?
5.
If leak testing completed & successful, have any covers been removed from the solar
collectors?
Gas Booster
1.
Ensure the gas supply is isolated. Remove the test point screw located on the gas inlet
connection and attach a pressure gauge.
2.
Turn on the electrical power to the gas booster and turn on the gas supply.
3.
Ensure the cold water inlet ('trio') valve on the storage cylinder inlet is open. Open all available
hot water taps.
4.
Operate ALL other gas appliances at their maximum gas rate, in accordance with
manufacturers instructions.
Ensure building occupants do not have access to hot water outlets during this
procedure.
CAUTION
5.
With all gas appliances in operation at the maximum gas rate, the pressure should read
between 1.13 - 3.0 kPa on Natural Gas. On LPG the pressure should be 2.75 - 3.0 kPa. If the
pressure is lower, the gas supply is inadequate and the appliance will not operate to
specification. It is the installers responsibility to check the gas meter, service regulator and pipe
work for correct operation/ sizing & rectify as required. Note that the gas regulator on the
appliance is electronically controlled and factory pre-set. Under normal circumstances it DOES
NOT need adjustment during installation. Make adjustments only if the gas booster is not
operating correctly and all other possible causes for incorrect operation have been eliminated.
Instructions for gas pressure setting are located in the pocket behind the front cover of the gas
booster.
6.
Close the hot water taps including the shower.
Rinnai Australia
- 38 -
Solar Close Coupled Operating / Installation Manual Issue 7 - 16/9/10
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