Installation Standards

 The water heater must be installed:

  • by a qualified person, and
  • in accordance with the installation instructions, and
  • in compliance with Standards SANS837 and SANS10037, as applicable under local regulations and all local codes and regulatory authority requirements.

Water Heater Location

 The water heater should be installed close to the most frequently used outlet and its position chosen with safety and service in mind. If this water heater is part of a solar water heater system, it should also be installed close to the solar storage tank. Make sure people (particularly children) will not touch the flue terminal. The flue terminal and air inlet must be clear of obstructions and shrubbery. Clearance must be allowed for servicing of the water heater. The water heater must be accessible without the use of a ladder or scaffold. Make sure the entire front panel can be removed for service. You must be able to read the information on the rating plate. Remember you may have to take the entire water heater out later for servicing

.GWH Installation

This water heater must be installed vertically upright with the water, gas and power connections on the underside, pointing toward the ground. The back of the water heater can be either against a wall or supported by a frame. Note: The water heater must be well secured to the wall or frame using two fasteners each at the top and bottom of the unit. Use the screws provided only if they are suitable for the wall or frame type. Otherwise select and use alternative fasteners suitable for the application. The fasteners must be capable of bearing the full weight of the water heater so it may not work loose nor impose any load on the gas and water pipe work connected to the water heater. Refer to the fastener manufacturer’s information and recommendations for the type of fastener to use for the wall or frame type and load bearing requirements

The water heater must not be installed in an area with a corrosive atmosphere where chemicals are stored or where aerosol propellants are released. Remember the air may be safe to breathe, but when it goes through a flame, chemical changes take place which may attack the water heater. A secondary flue is not required. The water heater must not be installed indoors or in a confined space. The water heater must be located to ensure that the location of the flue terminal complies with the requirements of AS 5601 or AS/NZS 5601.1, as applicable under local regulations. As a guide the following requirements are extracted from the Gas Installations Standard. The distances are measured along the wall behind the water heater. At least 300 mm between the top of the flue terminal and the eaves. At least 300 mm between the flue terminal and the edge of any opening into the building, such as an openable door or window, measured horizontally*. At least 1500 mm between the top of the flue terminal and the edge of any opening into the building, such as an openable window, measured vertically. At least 300 mm between the flue terminal and a return wall or external corner, measured horizontally*. At least 1500 mm between the flue terminal and any opening into a building, in the direction of the flue discharge. At least 500 mm between the flue terminal and a fence, wall or other obstruction, in the direction of the flue discharge.

Installation – Plumbing

All plumbing work must be carried out by a qualified competent person and in compliance with all local codes and regulatory authority requirements. To achieve true mains pressure operation, the cold water line to the water heater should be the same size or bigger than the hot water line from the water heater. The minimum recommended cold pipe or solar preheat pipe and hot pipe size is DN20.

Water Inlet and Outlet

All pipe work must be cleared of foreign matter before connection and purged before attempting to operate the water heater. All olive compression fittings must use brass or copper olives. Use thread sealing tape or approved thread sealant on all fittings. A full flow gate valve or ball valve must be installed on the cold water line or solar preheat water line to the water heater. A non return valve or stop tap must not be installed. An acceptable arrangement is shown in the diagram. A disconnection union (or similar) must always be provided at the cold water inlet and hot water outlet on the water heater to allow for disconnection of the water heater. Insulation used on the cold and hot water lines must extend up to the cold water inlet and hot water outlet of the water heater.  If necessary, a 600kpa pressure reducing valve may be fitted to the cold water inlet to the gas water heater.  Plumber must ensure a minimum of 1bar (100kpa) of constant water pressure is supplied to the gas water heater.  If by-passing old electrical geysers, ensure no water is flowing through the redundant electric geyser and electric supply is switched off.

Notes:

It is essential all pipe connections be correctly aligned, otherwise component connections within the water heater may be strained and / or components themselves misaligned. It is recommended also, wherever possible, pipe connections be made at the water heater first and final pipe runs be made in soft copper pipe to allow some adjustment for misalignment. Use the spanner flats on the water heater fittings and take care to avoid twisting the water inlet and outlet pipes inside the jacket.

In-series Solar Booster

SolarThe pipe work between the solar storage tank (if one is installed) and the in-series gas booster has a minimum recommended pipe size of DN20, MUST BE of copper and be fully insulated with a closed cell type insulation or equivalent. The insulation must be weatherproof and UV resistant if exposed. The insulation must be fitted up to the connections on both the solar storage tank and the in-series gas booster. The maximum supply temperature to the water heater when used as an in-series gas booster for a solar water heater is 80°C, a solar water tempering valve (or water mixing valve) must be installed on the solar system.  The hot water supply exiting the solar storage tank should be passed through the gas water heater (installed into the ‘cold water inlet’).  The hot water outlet from the gas water heater, should then feed to the hot water taps/showers etc.

Connections – Electrical 

All electrical work and permanent wiring must be carried out by a qualified person and in accordance with local codes and regulatory authority requirements.

Warning: Temperature controllers must not be fitted to this water heater if it is installed as an in-series gas booster with a solar water heater system. If a solar booster has been installed to an existing water heater installation, then all controllers must be disconnected and removed.

The water heater is supplied with a 1.8 metre lead and plug and requires a weatherproof 240 V 50 Hz general purpose outlet (GPO) to be located within 1.2 metres of the installation. The GPO must be clear of the flue exhaust, draining water, gas supply pipe and water connections. The power consumption of the water heater is:

Component Power Consumption

Gas water heater:

20 l/min 26 l/min 27 l/min
     
61 Watts – Burner on, 64 Watts – Burner on, 67 Watts – Burner on,
anti frost device inactive anti frost device inactive anti frost device inactive
138 Watts – Burner on, 138 Watts – Burner on, 138 Watts – Burner on,
anti frost device active anti frost device active anti frost device active

The water heater will only operate on a sine wave at 50 Hz. Standby power consumption approx 9 watts.  Devices generating a square wave cannot be used to supply power to the water heater.

The Anti-frost device only kicks in, in extreme conditions. It will automatically turn on, when the unit is connected to a power source, when the temperature drops to approx -2’C and will automatically shut off once the temperature reaches 4’C.

Download an Installation Guide for GWH by clicking here

No installer may open the geyser and change any settings. This may invalidate the warranty and may cause a hazard for the user. Please contact us for more information.