iStore 270L R290 Heat Pump Owner’s Manual v1.4 Jan2025

Description

Home Owner Maintenance

Temperature and Pressure Relief valve PTV/PTR (all tanks)

The iStore Hot Water system is fitted with an 850kPa PTR Valve, which is located on the side of the cylinder and is essential for its safe operation. It is important that you operate the lever on the PTR valve for a few seconds once every 6 months. It is important you release the lever gently so the valve seat is not damaged.

Expansion Control Valve (ECV) (if applicable)

In some states and local councils, the installation of an Expansion Control Valve (commonly referred to a cold-water expansion valve) is required to be installed. If this valve is fitted, follow the same procedure for PTR valve as explained above.

Condensation line

Regularly inspect the condensation line to ensure water is dripping freely from the line. If the condensate drain is blocked at the discharge end, clear any debris that may have collected in the line. During normal operation, condensation occurs from the transfer of air across the evaporator coil. This process is drawing humidity from the air and creates condensation/water droplets on the coils, which in turn is captured in the fully moulded condensate tray and discharged through the condensate drain line. In locations with humidity greater than 80%, up to 5 litres per day can be expected under normal operating conditions.

Obstructions

Regularly check the no obstructions are interfering with the air in-take or air discharge. If unit is installed near shrubs or trees, keep them trimmed so they do not interfere with air flow.

Recommended iStore Servicing

2 Year Service

The recommended two-yearly service should be carried out by a licensed tradesperson. It is recommended that this service be carried out by your local iStore installer. The service should include the following:

1. Replace the anode (anodes should be replaced more frequently if subjected to hard water conditions, refer table in the warranty exclusions, iStore must be consulted regarding the replacement anode if not a genuine iStore anode). If the TDS is greater than 600PPM, the anode shall be inspected every year and replaced at intervals not greater than every 12 months

5 Year Service

2. Replace the pressure & temperature relief valve. (PTR Valve)

3. Flush the water heater

4. Check and clean tempering valve filters and operation

Trouble Shooting

PROBLEM	SOURCE	EXPLANATION
Water not as hot as previous hot water system	Tempering Valve installed	A tempering valve must be installed on every solar hot water system. Tempering valves will mix water down to 50°C.
No Power at Screen	Circuit breaker turned off AC Isolator Turned Off Power surge	Check Circuit breaker in meter box Check AC Isolator in on position Contact iStore
No Hot Water - 1	Faulty Tempering Valve	Pull PTR lever and check if water is hot. If water is hot, contact a licensed plumber to replace tempering valve.
No Hot Water – 2	Off-Peak Tariff	Check screen to see if power is available during your nominated off-peak tariff heating times. Refer to your electricity distributor should power not be available from off-peak supply
No Hot Water – 3	Timer not set correctly	Ensure that timer is set to heat to your hot water demands. A secondary heating cycle maybe required if large hot water demand is used twice per day. Refer above instructions for timer settings
Luke Warm Hot Water - 1	Tempering Valve	Tempering valve not mixing water correctly. Contact a licensed plumber to inspect / replace the valve
Luke Warm Hot Water – 2	Excessive Hot Water load	Unexpected additional hot water load. Plan hot water usage to be staggered, not continuous consumption. Wait for system to re-heat. Increase timer setting if in use.
Overflow pipe is dripping	Pressure Temperature Relief Valve (PTR) / Expansion Control Valve (ECV) where applicable.	An 850kPa and 99°C PTR valve is used on the iStore water tank, which is located on the side of the water tank and is essential for its safe operation. The PTR valve / ECV valves are designed to allow approx. 3-5% of total tank volume to discharge during heating to cater for hot water expansion
Water pressure is slightly lower than previous hot water system	Pressure Reduction Valve (PRV)	A pressure reduction valve has been installed to limit the inlet pressure to your new iStore Water Heater. This device regulates the incoming pressure & increases life of the cylinder. This device will also protect your cylinder if the mains pressure is increased by the local water authority.