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INSTALLATION & MAINTENANCE - GAS BOOSTED SYSTEMS
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 and successful, have any covers been removed from the solar collectors?
6. Has operation of the solar pump been checked?
7. Have the hot and cold sensors and leads been positioned and connected correctly?
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 only (not the solar pump kit) 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.
7. Close the cold water inlet ('trio') valve on the storage cylinder inlet and inspect and clean the strainer.
Repeat for the strainer connected at the inlet of the gas booster. This procedure may need to be
repeated to ensure the strainers remains clear, especially on new installations.
8. Confirm the hot water delivery temperature from the gas booster. This is done by checking the hot
water delivery temperature at an untempered outlet close to the water heater. This is usually the hot
water outlet in the kitchen. The untempered hot water delivery should be between 65°C & 70°C.
Temperature Limiting Devices
1. Commission any temperature limiting devices in accordance with the instructions supplied by the
manufacturer.
2. Confirm the hot water delivery temperature at a tempered water outlet. Tempered water outlets should
be those supplying areas primarily used for the purposes of personal hygiene such as bathrooms.
The hot water delivery temperature should not exceed 50°C or 45°C as detailed in the section See
"HOT WATER DELIVERY TEMPERATURE" on page 18.
Rinnai Australia
- 49 - Solar Split Systems Operating / Installation Manual - Version 9 - 21/11/12
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