1. Select a well-ventilated area, typically near a gas line and water supply. 2. Secure the gas geyser on the wall using appropriate brackets. 3. Attach the gas inlet pipe to the geyser using proper fittings. 4. Connect the inlet and outlet water pipes to the geyser. 5. If required, connect the ignition system or thermostat. 6. Check the gas and water connections for leaks. 7. Turn on the gas and water supply to ensure the geyser heats properly.