Hayward H150FDN All models English - Page 9

SECTION 3. INSTALLATION Reversible water connections: The H-Series heater is designed so that it can be installed with the water connections located on either the left or right side of the heater. Heaters are shipped from the factory with the water connections on the right side. To bring the water connections to the left side, follow the step-by-step instructions below and refer to the illustration in Figure 8. A trained service technician should perform these procedures before the heater is installed. 1. Lift up and remove heater integral vent. 2. R emove screws from left and right side access panels and remove the panels. 3. Remove screws from rear heat shield and remove heat shield. 4. Remove screws from top rain guard and remove rain guard. 5. D isconnect high limit wires from the main harness and/or terminal block. Pull the high limit wires through oval slot in the intermediate panel. Disconnect wires from the pressure switch. Reroute the disconnected main harness wires to opposite side of heater. 6. R emove the pressure switch tube and pull through oval slot in the intermediate panel. 7. Millivolt Heaters Only - Remove the thermostat bulb from the front header and reroute to opposite side of heater. ! NOTE: Using needle nose pliers to pull out copper strip makes bulb removal easier. Pull thermostat capillary tube and bulb through oval slots in the intermediate panel. ! CAUTION: Be careful not to crimp capillary tube as they could break from mishandling. 8. Electronic Heaters Only - Disconnect thermistor leads from control panel and pull through intermediate panel. 9. R emove the drain valve and brass plug from the front header and save for reinstallation. 10. R emove the four screws from the flue collector and remove flue collector from heater. 11. R emove 12 nuts retaining front header and carefully remove header. CAUTION: By-pass and thermal governor may become dislodged when removing front heater. They must be reinstalled properly prior to reinstallation of front header. CAUTION: Header O-rings may be reused if not permanently deformed. If installing new O-rings, Jack's 327 Lube may be liberally applied to O-rings to keep them in place during header installation. 12. L ift out heat exchanger and rotate it 180 degrees horizontally. CAUTION: DO NOT FLIP IT OVER. THE HEAT EXCHANGER WILL BE DAMAGED IF INSTALLED INCORRECTLY. CAUTION: Care must be taken not to damage top corners of combustion chamber panels. 13. R einstall front header on heat exchanger (TOP marking on header should now be on the bottom). 14. T orque nuts from 5 to 7 ft.-lbs. in the sequence shown in Figure 8. Install drain previously removed into the bottom header, and install brass plug into the top. Use new sealant on the threads of these parts before reinstalling. Do over tighten. 15. M ove the pressure switch tube over to the left side of the heater and route through hole in the intermediate panel. Insert tube in fitting and tighten the ferrule down with the nut. 16. R eplace the flue collector and secure with the four screws. Make sure insulation strips on flue collector remain in place. 17. Millivolt Heaters Only - Carefully route the thermostat capillary tube and bulb to the heater left side and route bulb through the oval slot in the intermediate panel. Place thermostat bulb back in the bulbwell using the copper strip to hold the bulbs all the way into the bulb-well. 18. Electronic Heaters Only - Route thermistor leads through intermediate panel and plug into control panel. 19. P ull high limit wires through oval slot in the intermediate panel. Reattach the main harness wires to the limit switches wires. Reattach wires to pressure switch. 20. Replace the heater front door. 21. R eplace the top rain guard and secure with screws removed in step 4. 22. R eplace the rear heat shield and secure with screws removed in step 3. 23. P lace access covers on the opposite sides and secure with screws removed in step 2. 24. Replace heater top. 25. C heck for any possible leaks after initial filtration system start-up. Heater Top Rain Guard Flue Collector Heat Exchanger Left Access Panel Hi-Limit Wire Harness Pressure Switch Tube Right Access Panels Thermostat Bulbs 5 7 12 10 4 1 2 3 9 11 8 6 Figure 8 7