Rinnai SUNMASTER Installation Manual download pdf (Page 44)

Rinnai Australia - 42 - Solar Split Systems Operating / Installation Manual

INSTALLATION PROCEDURE

Install Solar Collectors

Position and install the solar collectors in accordance with the section ‘INSTALLATION SOLAR

COLLECTORS”.

1. Position Storage Cylinder

Position the hot water storage cylinder on a level base in accordance with the section ‘STORAGE

CYLINDER LOCATION’.

2. Connect PTR Valve

• Connect the PTR Valve in the location shown in the relevant diagram of Figures 27 to 30.

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 Table 3.

• 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.

3. Mount Gas Booster

Mount the gas booster in accordance with the section ‘GAS BOOSTER LOCATION & MOUNTING’.

4. Connect Fittings and Mount Pump Assembly

Connect fittings and pipe work as shown in the relevant diagram in Figures 27 to 30. 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.

5. 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".

6. Connect Temperature Sensor Leads

• The hot (longer) temperature sensor lead should be fitted into

the air bleed / hot sensor lead assembly at the collector hot

return connection as shown in Figures 25 to 26. It must be

sealed in place with thermoplastic putty or silicone.

• Run the lead down the solar return pipe and connect it to the

connection within the pump and controller assembly as shown

in the diagram. Ensure the lead is protected from light. Figure

34 - Temperature Sensor Leads

• The cold (shorter) temperature sensor lead should be fitted as

shown in the relevant diagram in Figures 27 to 30. It must be

sealed in place with thermoplastic putty or silicone. The plug is

then connected to the pump and controller assembly as shown

in the diagram.

• Replace Pump Assembly Cover.

IT IS IMPORTANT THAT THESE PROBES ARE INSTALLED AS SPECIFIED. FAILURE

TO DO SO WILL LEAD TO MALFUNCTION OR LACK OF HOT WATER.

cold sensor connection

in pump box.

hot sensor connection

in pump box.

cold sensor lead

connection

hot sensor lead

connection

Figure 3 - Temperature Sensor Leads

NOTE

INSTALLATION & MAINTENANCE - GAS BOOSTED SYSTEMS

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