Installation instructions
Once connections are made, check for gas leaks at all joints. Apply some gas leak detection solution to all gas fittings. Bubbles are a sign of a leak. A combustible gas detector may also be used to detect for leaks.
Danger: If you have a leak, shut off the gas. Tighten appropriate fittings to stop leak. Turn the gas on and check again with a gas leak detection solution. Never test for gas leaks using a match or flame.
GAS LINE SIZING
The gas supply piping for a single heater should be sized for a maximum draw of 199,000 BTUH. Measure the length of gas supply line and use the tables in Fig. 29, page 24 or the gas line manufacturer’s sizing tables to determine the pipe diameter necessary to accommodate the 199,000 BTU demand of the heater. If there are more gas appliances on the line, size the gas line according to the total maximum amount of BTU input rating for all appliances.
Note: Undersizing the gas line may result in diminished hot water flow rate and temperature. See chapter 3.12, page 27 for the procedure to confirm gas pressure. Proper gas pressure must be confirmed at time of installation.
Gas piping
Fig. 28
Inlet gas particle screen (included)
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