Installation Procedure - Rinnai Prestige Operation & Installation Manual

INSTALLATION - GAS BOOSTED SYSTEMS

INSTALLATION PROCEDURE

1. Install Solar Collectors
Position and install the solar collectors in accordance with the section 'Installation - Solar Collectors' on page
25.
2. Position Storage Cylinder
Position the hot water storage cylinder on a level base in accordance with the section 'Storage Cylinder
Location' on page 20.
3.
Connect PTR Valve
Connect the PTR Valve in the location shown in the relevant diagram on pages 38 to 43. Leave the valve
outlet pointing down. Tighten the valve using the spanner flats - never use the valve body.
The PTR Valve must be adequate for the thermal loading applied to the storage cylinder. In the case of gas
boosted systems, the thermal load is applied only by the solar collectors. The continuous flow hot water
heater does not apply thermal load to the storage cylinder. The potential solar output for the solar collectors
at PTR Valve relief conditions is listed in the table on page 14.
The PTR Valve pressure ratings vary according the cylinder specifications. The maximum heater input rating
is 10.0 kW. The PTR valve rating MUST EXCEED the total input from the solar collectors. If it does not, the
PTR valve MUST be exchanged for a model of higher capacity.
For example, for a gas boosted solar system with 3 x SP200A collectors, the thermal load is 3 x 1.25 = 3.75
kW. This is less than 10.0 kW, hence the supplied PTR valve is of sufficient capacity.
Use teflon thread tape on the valve, never use hemp or other sealing materials. Ensure the tape does not
protrude past the end of the thread, which could result in it hanging over the end of the thread and blocking
the water passage through the valve.
4. Mount Gas Booster
Mount the gas booster in accordance with the section 'Gas Booster Mounting' on page 37.
5. Connect Fittings and Mount Pump Assembly
Connect fittings and pipe work as shown in the relevant diagram on pages 38 to 43. Remove cover of
pump box and attach pump box to cylinder using screws provided. DO NOT connect the power lead to power
supply at this stage.
6. Set Frost Protection Mode
Adjust Dip Switches on Solar Controller to give the required frost protection. (Refer page 23).
7. Install and Connect Flow and Return Pipe Work
Connect flow and return pipe work between storage cylinder and solar collector. Ensure that suitable pipe and
insulation is used as described in the section 'Water Pipes' on page 21.
A heat trap is recommended on the return line from the cylinder if the pipework is to rise vertically to prevent
heat losses due to the thermosyphoning of hot water from the tank.
Rinnai
Hot water return
from collectors
250 mm
Heat Trap
44 Split Solar OIM