Direct Vent Gas Fired Hot Water Boiler INSTALLATION ...
2015-8-25u2002·u2002the boiler. B. Use appropriate valves to prevent the chilled medium from entering the heating boiler. • During heating cycle open valves A and B. Close valves C and D. • During cooling cycle open valves C and D, close valves A and B. C. Maintain a minimum clearance of 1 inch (2.54 cm) to hot water pipes. In air handling units where they may
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