Adjusting Flow Rate; Pre Solar Heating Checks - Rinnai Enduro XL SP250B Operation & Installation Manual

INSTALLATION

ADJUSTING FLOW RATE

If the solar pump does not activate the system can still be commissioned as detailed in these
instructions, but solar preheating will not be available until the pump and controller operate.
NOTE
The purpose of controlling the water flow rate between the collectors and storage cylinder is to optimise the
performance of the system. The optimum flow rate for the system is achieved by changing the setting on the pump
as shown in the diagram below.

PRE SOLAR HEATING CHECKS

Before commencing solar heating of the water in the system ensure the following actions have been completed:
Solar Collectors
Is the solar collector installed with the correct orientation and inclination?
1�
Is the installation finished neatly with the roof made good, all tiles and flashings in place?
2�
Are the bolts tight on the roof framework?
3�
If leak testing completed and successful, have any covers been removed from the solar collectors?
4�
Has operation of the solar pump been checked?
5�
Have the hot and cold sensors and leads been positioned and connected correctly?
6�
Has all the pipework and exposed fittings been correctly insulated?
7�
Gas Booster
Ensure the gas supply is isolated. Remove the test point screw located on the gas inlet connection and attach
1�
a pressure gauge.
Turn on the electrical power to the gas booster only (not the solar pump kit) and turn on the gas supply.
2�
Ensure the cold water inlet ('trio') valve on the storage cylinder inlet is open. Open all available hot water taps.
3�
Operate ALL other gas appliances at their maximum gas rate, in accordance with manufacturers instructions.
4�
Ensure building occupants do not have access to hot water outlets during this procedure.
CAUTION
Rinnai 26
Low Profile Roof Mounted OIM