Clearances; Installation Procedure - Rinnai PRESTIGE Operation & Installation Manual

INSTALLATION & MAINTENANCE - GAS BOOSTED SYSTEMS

INSTALLATION PROCEDURE

1. Install Solar Collectors
Position and install the solar collectors in accordance with the section 'INSTALLATION SOLAR
COLLECTORS'.
2. Position Storage Cylinder
Position the hot water storage cylinder on a level base in accordance with the section 'STORAGE
CYLINDER LOCATION'.
3. Connect PTR Valve
• Connect the PTR Valve in the location shown in the relevant diagram of Figures 32 to 36.
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.
4. Mount Gas Booster
Mount the gas booster in accordance with the section 'GAS BOOSTER LOCATION & MOUNTING'.
5. Connect Fittings and Mount Pump Assembly
Connect fittings and pipe work as shown in the relevant diagram in Figures 32 to 36. 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 19).
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'.
8. 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 32 to 36. 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 32 to 36.
Rinnai Australia
hot sensor connection
in pump box.
hot sensor lead
connection
- 44 - Solar Split Systems Operating / Installation Manual - Version 8 18/10/10
cold sensor connection
in pump box.
cold sensor lead
connection
Figure 3 - Temperature Sensor Leads