Hayward H150FDN All models English - Page 21

SECTION 4. INSTALLER CHECKOUT & START-UP GENERAL: Some of the following procedures will require the heater to be operating. Full lighting and shutdown instructions are included on the lighting instructions label secured inside the cabinet. The instruction labels are shown in Figures 39 and 40. The millivolt heater must be lit manually. The electronic ignition models are lit automatically on each call for heat. Water must be flowing through the heater during operation. Check that the pump is operating and the system is filled with water and purged of all air, prior to starting heater. ! SAFETY WARNING: Do not remove the 1/8" plug with the gas valve in the "ON" position. The gas valve must be in the "PILOT" or "OFF" position when the plug is removed. 2. Remove 1/8" plug from gas valve. 3. Install 1/8" pipe nipple into gas valve. 4. Attach manometer to the 1/3" pipe nipple. See Figure 34. GAS LINE TESTING: The appliance and its gas connection shall be leak tested before placing the appliance in operation. The heater and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.45 kPa). The heater must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 psig (3.45 kPa). Gas supply line must be capped when not connected. After pressure testing, reconnect the gas piping to the gas valve. Turn gas supply on and test all pipe and pilot tubing joints for leaks. Use a soap and water solution. Bubbles forming indicate a leak. Never use an open flame (match, lighter, torch, etc.) as a leak could cause an explosion or injury. Shut off gas and fix even the smallest leak right away. Be sure to leak test main burner and pilot tube fittings using above procedure once heater is in operation. GAS PRESSURE TEST PROCEDURE: The following gas pressure requirements are important to the proper operation of the burners and pilots in gas heaters. Improper gas pressure or gas volume will create the following conditions: 1. Flame burns totally yellow. 2. Flame lifts off burner. 3. Heat exchanger soots up. 4. Pilot outage on millivolt heaters. The pressure regulator on all H-Series heaters is preset at the factory and normally needs no adjustment. If gas pressure is inadequate, check for undersized piping between meter and heater or for low capacity gas meter. A. GAS PRESSURE TEST PROCEDURE: 1. Obtain necessary equipment: a. M anometer to read pressure in inches of water column. b. 1/8" nipple (1/8" pipe thread x 1" long). c. 5/16" open end wrench. d. Screwdriver. MANOMETER TUBE Figure 34: Gas Pressure 5. T urn on water system and start heater following the lighting instructions on the label inside the cabinet. If there is more than just the pool/spa heater connected to the gas supply line, turn each of those appliances on while testing the heater. 6. T ake pressure reading with the heater running. Propane gas must have 9" W.C. (water column pressure). Natural gas must have 3.5" W.C. See Figure 35. NATURAL PROPANE Figure 35: Gas Pressure Reading 19