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Ensure that the replacement cylinder is the correct one for manufacturer's instructions and tools should not be used. the installation. CONCORD CXAP 40 - 80 models LEGEND Thermostat knob. Mains gas inlet cock.
Note that this may not protect remote parts of the system, in which case a separate frost thermostat should be fitted or the system drained and the boiler shut down for as for 'Long Periods'. Concord CXAP 40-100 - User's Guide...
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EMERGENCY ACTION NOTICE GAS LEAKAGE* FIRE* (usually detected by a distinctive smell) IMMEDIATE ACTION: Do not operate electrical switches Never look for a leak with a naked flame* IF SAFE TO DO SO, SHUT OF GAS SUPPLY IMMEDIATE ACTION: Do not attempt to extinguish the flames by any other means. CLOSE all supply valves.