User Guide for Zip Electric Mains Pressure Water Heater

Important Information

This guide provides essential instructions for the installation, operation, and maintenance of Zip Electric Mains Pressure Water Heaters. All installation and service work must be performed by a qualified person. Failure to follow these instructions may void the warranty and create safety hazards.

Safety and Warnings

• Scalding Risk: The water heater operates at temperatures between 60°C and 70°C. These temperatures can cause severe scalding. It is recommended to install a temperature limiting device on hot water lines to bathrooms and ensuites to keep temperatures below 50°C.
• Qualified Personnel: Installation, maintenance, and repairs must be carried out by a qualified person.
• Electrical Safety: The unit uses 220V-240V AC power. Never operate the heater with the front cover removed.
• Relief Valves: The temperature pressure relief valve and expansion control valve are critical safety devices. Do not tamper with or remove them.
• Danger: If the over-temperature cut-out operates, do not reset it; the unit must be serviced by a qualified person.

Installation Requirements

• Location: Suitable for indoor or outdoor installation. The unit must be installed vertically on a stable base.
• Access: Ensure the temperature pressure relief valve lever is accessible and there is sufficient headroom for anode inspection/replacement.
• Seismic Restraints: All water heaters must be restrained to protect against seismic forces.
• Water Supply: The maximum mains supply pressure is 680 kPa. If pressure exceeds this, a pressure limiting valve must be installed.

Plumbing Connections

• Valves: An isolation valve and non-return valve must be installed on the cold water line. An expansion control valve is mandatory on the cold water line.
• Relief Valve: The temperature pressure relief valve must be fitted before operation. Ensure the drain line is left open to the atmosphere and installed in a continuously downward direction.
• Connection Sizes: Hot and cold water connections are Rp 3/4; relief valve connection is Rp 1/2.

Electrical Connections

• Power Supply: The unit must be directly connected to a 220V-240V AC 50Hz supply.
• Isolation: An isolating switch must be installed at the switchboard. A second, lockable isolating switch adjacent to the unit and an RCD may be required by local wiring rules (AS/NZS 3000).
• Filling: Do not switch on the power until the water heater is completely filled with water.

Commissioning and Draining

• Commissioning: Open all hot water taps, open the cold water isolation valve, and wait for water to flow freely from taps to ensure the tank is full. Check for leaks before switching on the electrical supply.
• Draining: Turn off the electrical supply and close the cold water isolation valve. Open a hot water tap to relieve pressure, then attach a hose to the cold water inlet union and open the relief valve to allow air in and water to drain.

Maintenance Requirements

• Minor Maintenance (Every 6 Months): Operate the easing lever on the temperature pressure relief valve and expansion control valve to clear deposits. Ensure the lever is raised and lowered gently. Check that the safe tray drain line is not blocked.
• Major Service (Every 5 Years): Replace the temperature pressure relief valve, inspect/flush the expansion control valve, inspect/replace the anode, and check the heating unit for calcium build-up.

Warranty Information

The warranty covers repair or replacement of faulty components. It does not cover damage from misuse, improper installation, poor water quality, or failure to maintain the unit. Claims must be made through the Rheem New Zealand Service Department.