Hayward 100K Btu Abg Or Spa H Propane Models: ABG1001 and H100ID1 - Page 6

Section IV. Qualified Technician - Servicing General: WARNING: Do not attempt to repair any components of heater. Do not modify heater in any manner. To do so may result in a malfunction which could result in death, personal injury, or property damage. Check with consumer to see if any part of heater has been under water. Replace any part of the control system and any gas control which has been under water. Never use or attempt to use parts that have been previously used. CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. Burner cleaning: If required, burners can be cleaned in the following manner: 1. Turn pump, main gas valve and heater power off. 2. Remove the gas manifold. 3. Remove the burners. 4. Brush burners with a wire brush and check that they are free of lint, dust and spider webs before each season of use. Burners with damaged ports must be replaced. Gas valve replacement: WARNING: Do not attempt to repair gas valve. If found to be defective, replace entire valve. Attempts to repair it will void warranty. 1. Turn pump, main gas valve and heater power off. 2. Disconnect wires to gas valve. 3. Unscrew gas valve from manifold. 4. Install new valve. 5. Reconnect wires to gas valve. Direct spark module: The direct spark ignition module is the master control, processing the operational information from the other controls. When the thermostat calls for heat, the blower turns on for 10 seconds before the ignitor begins to spark. The ignitor begins sparking at the same time the main gas valve opens, which causes ignition of the main burner gas. If ignition does not happen within 10 seconds, the module will try to light for (3) consecutive tries at 30 second intervals. If no ignition is received the control will lock out for 1 hour. To reset the module, the thermostat must be turned to the "OFF" position and back "ON". To replace the module: 1. Turn pump, main gas valve and heater power off. 2. Unplug heater. 3. Disconnect wires from the module. 4. Remove module retaining screws. 5. Replace module. Combustion blower: The combustion blower provides the air that mixes with the gas from the main burners for the combustion process. On initial start-up, the blower operates for 10 seconds to purge gas out of the heater. Then, the main gas valve opens, the ignitor sparks for a maximum of 10 seconds and the heater lights. The blower operates the entire time the gas valve is open. Combustion blower replacement: 1. Turn pump, main gas valve, thermostat and heater power "OFF". 2. Remove screws retaining the main top. 3. Disconnect wires attached to the blower. 4. Remove external vent terminal. 5. Remove duct from blower to vent terminal. 6. Remove screws attaching blower to flue collector. 7. Replace blower. 8. Reverse above procedure for installation. 6