Filling The System; Checking Solar Pump Operation; Adjusting Flow Control Valve - Rinnai Prestige Operation & Installation Manual

FILLING THE SYSTEM

Ensure building occupants are warned to stay clear of the solar system components, building perimeter
and roof since hot water or steam may be discharged from pipes or components.
CAUTION
1. Ensure the electric power supplies to the water heater and pump kit are switched 'OFF'.
2. Turn 'ON' the hot water tap at the sink. Open the stop cock in the cold water mains supply line.
3. The entire system will now be filled with cold water. Most air will be dispelled through the tap. Some air needs
to be bled from the air bleed valve on the collectors.
4. Turn 'OFF' the hot tap at the sink when water flows freely without air bubbles or air bursts. Check all connections
for leakage and tighten if necessary. This applies especially to fittings in positions not easily accessed such
as near the solar collectors. Operate the easing gear of both the PTR and ECV valves at the storage cylinder
to ensure these valves are functional.
If leaks are detected the system must be drained and leaks repaired before the system is refilled. If
this is necessary, cover the solar collectors with packaging cardboard or a tarp to prevent them from
CAUTION heating which could result in steam or hot water being discharged from fittings..

CHECKING SOLAR PUMP OPERATION

1. Ensure hot and cold sensors are connected as shown on page the section 'Connect Temperature Sensor
Leads' on page 55.
2. Activate power supply.
3. Pumps will operate when solar energy is available to be collected. Pump operation can be checked by placing
the end of a screw driver to the pump body and the other end of the screw driver near your ear.

ADJUSTING FLOW CONTROL VALVE

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 the flow control valve is to allow the water flow rate through the
collector and storage cylinder to be controlled to optimise the performance of
the system. The optimum flow rate for the system will depend on the number of
collectors and the type of storage cylinder.
The flow control valve needs to be adjusted while the pump is operating. The flow
rate valve is read at the bottom of the baffle float as shown. Using a flat bladed
screw driver turn the screw on the valve until the value from the table below is
achieved
Rinnai
INSTALLATION - ELECTRIC BOOSTED SYSTEMS
Number of Collectors
1
2
3
57
Suggested Flowrate
(l/min)
0.5
1.0
1.5
Split Solar OIM