Installation Procedure - Rinnai SG175 Operation & Installation Manual

INSTALLATION

INSTALLATION PROCEDURE

1. Install Solar Collectors
Position and install the solar collectors in accordance with the installation manual supplied with the solar
collectors�
2. Position Storage Cylinder
Position the hot water storage cylinder on a level base in accordance with the section 'Storage Cylinder' on
page 18�
3. ConnectPTRValve
Connect the PTR Valve in the location shown in the relevant diagram on pages 26 to 35� 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 12�
The PTR Valve pressure ratings vary according to the cylinder specifications. The maximum heat 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 Enduro 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.
4. MountGasBooster(whereapplicable)
Mount the gas booster in accordance with the section 'Gas Booster Mounting' on page 25�
5. Connect Fittings and Mount Pump Assembly
Remove cover of pump box. Connect pump box and fittings as shown in the relevant diagram on pages 28
to 33. Position pump box on cylinder ensuring flexipipe has a smooth bend with no kinks. Attach pump box to
cylinder using screws provided� DO NOT connect the power lead to power supply at this stage
6. Set up Solar Controller
Refer to the instructions provided in the solar controller manual�
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, Fittings and Insulation' on page 20�
A heat trap is required 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
36 Split Solar OIM