Solar Heating; Finishing The Installation - Rinnai Enduro XL SP250B Operation & Installation Manual

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.
Close the hot water taps including the shower.
5�
Close the cold water inlet ('trio') valve on the storage cylinder inlet and inspect and clean the strainer. Repeat
6�
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.
Confirm the hot water delivery temperature from the gas booster. This is done by checking the hot water
7�
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
Commission any temperature limiting devices in accordance with the instructions supplied by the manufacturer.
1�
Confirm the hot water delivery temperature at a tempered water outlet. Tempered water outlets should be
2�
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 'Hot Water Delivery
Temperature' on page 15.

SOLAR HEATING

Remove any cardboard or tarp covers that may have been placed over the solar collectors to prevent them
1�
from heating water during installation and commissioning.
Activate electrical power to both the gas booster and solar pump and controller. Solar heating of the water in
2�
the cylinder will now commence when sufficient solar radiation is available.

FINISHING THE INSTALLATION

After testing is completed explain to the householder the functions and operation of solar water heater
1�
components and the importance of carrying out maintenance.
Complete the installation record at the back of the manual.
2�
Leave this manual and the warranty booklet with the householder.
3�
Rinnai 27
INSTALLATION
Low Profile Roof Mounted OIM