Reversible Water Connections - Hayward Universal H-Series Low NOx Service & Installation Manual

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REVERSIBLE WATER CONNECTIONS:

This heater is designed so that it can be installed
with the water connections located on either the right
or left side. Heaters are factory-shipped with right-side
water connections. To move the connections to the left
side follow the instructions below and see Figure 15. A
trained service technician should perform these steps
before the heater is installed.
1. Before beginning, be aware that it is not necessary to remove the water header from the heat exchang-
er. When this procedure is complete, the water inlet will be located at the BACK of the heater. The
water outlet will be located at the FRONT.
2. Remove screws and remove both of the upper plastic heater side panels (see Figures 14 and 15). Note
the wires that pass through a hole in the heater side panel go through a split-bushing, which will allow
separation of the wires from the panel without disconnecting them.
3. Disconnect the 2 wires connecting the heater wire harness to the heat exchanger header. One is lo-
cated on the water pressure switch and one is located on the temperature limit switch, both on the top
of the header. Pull these wires into the heater cabinet from the hole in the right-hand metal side panel
in the heater, and re-route them out through the left-hand metal side panel in the heater.
4. Remove countersunk screws on the heater top and remove louvered exhaust panel on heater top (see
Figure 15).
5. Remove the heater top flue cover by removing 3 screws on each side of the heater (see Figure 15).
6. Remove screws and remove rain shield assembly (see Figure 15). Note that there are screws which
hold the rain shield assembly to the heat exchanger tube sheets, which also must be removed.
7. Remove the front access panel (see Figure 15).
8. Disconnect water temperature sensor plug from the ignition control board located inside the heater
(see Figure 15).
9. Pull the water temperature sensor wires out of the heater cabinet through the hole in the right-hand
metal side panel.
10. Lift and rotate the heat exchanger. Do not flip. Use care when setting the heat exchanger in place not
to damage the white sealing gaskets or combustion chamber.
11. Route the water temperature sensor wires into the heater cabinet through the hole in the left-hand
metal side panel, and re-connect to the ignition control board.
12. Re-connect the heater wire harness to the water pressure switch and temperature limit.
13. Reverse the above steps to reassemble the heater.
Figure 14:
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-351-5400
Screw Locations
Figure 14
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