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

INSTALLATION & MAINTENANCE - ELECTRIC BOOSTED SYSTEMS

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
CAUTION
or components.
1. Ensure the electric power supplies to the water heater and pump kit are switched 'OFF'.
2. Ensure the gas supply to the continuous flow water heater is isolated.
3. Turn 'ON' the hot water tap at the sink. Open the stop cock in the cold water mains supply line.
4. 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.
5. 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 assessed 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
CAUTION
cardboard or a tarp to prevent them from 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 in Figure 37.
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.
The dip switches within the pump control box should not be adjusted.
If the solar pump does not activate the system can still be commissioned as detailed
NOTE
in these instructions, but solar preheating will not be available until the pump and
controller operate.

ADJUSTING FLOW CONTROL VALVE

The purpose of the flow control valve is to allow the water flow
rate through the collector collectors and storage cylinder to be
controlled to optimise the performance of the system. The
optimum flow rate for the system will depend on the type of
system (electric or gas boost), the number of collector
collectors, and the location of the installation (see the solar
zone shown in Figure 38).
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 in Figure 39. Using a flat bladed screw
driver turn the screw on the valve until the value from Table 10
is achieved.
Rinnai Australia
Figure 38 - Australian Solar Zones
Figure 39 - Adjusting Flow Control Valve
- 57 - Solar Split Systems Operating / Installation Manual Version 8 - 18/10/10