15
ONLY USE GENUINE HAYWARD REPLACEMENT PARTS
51300803801 REV B
GAS CONVERSION PROCEDURE:
These instructions are intended to be used only with the HDF gas pool heaters from Hayward. All HDF heaters are shipped from the factory
ready to be installed and used with Natural Gas. If your application requires the use of propane gas (LP), the fuel/air mixer installed in the com-
bustion blower inlet must be replaced with the fuel/air mixer designed for use with propane. The propane mixer is included with every unit and
can be found in the consumer kit shipped in the top of the carton with your HDF gas heater.
WARNING:
DO NOT SUPPLY AND OPERATE THE UNIT WITH PROPANE GAS BEFORE INSTALLING THE CORRECT FUEL/
AIR MIXER COMPONENT. Attempting to install and operate the heater in a propane gas application without installing the correct fuel/air
mixer according to the instructions in this manual may result in a fire or explosion causing property damage, injury, or death.
NOTE:
For units being installed in Canada, the conversion shall be carried out in accordance with the requirements of the provincial authorities
having jurisdiction and in accordance with the requirement of the
Natural Gas and Propane Installation Code,
CSA B149.1.
Components required to convert the heater from Natural Gas to Propane are supplied in the consumer kit shipped with your new heater. The
location of the consumer kit in the heater carton is shown in Figure 5. Only two components, a molded fuel/air mixer and the appropriate field
conversion label, are needed to convert the unit to run on propane. Make sure
the mixer installed on the unit has the correct fuel gas for your application mold-
ed into its face.
WARNING: This conversion kit shall be installed by a qualified service agency in accordance
with the manufacturer’s instructions and all applicable codes and requirements of the
authority having jurisdiction. The information in these instructions must be followed to
minimize the risk of fire or explosion or to prevent property damage, personal injury or death.
The qualified service agency is responsible for the proper installation of this kit. The
installation is not proper and complete until the operation of the converted appliance is
checked as specified in these instructions.
TO INSTALL PROPANE FUEL/AIR MIXER (REFERENCE FIG. 6):
1. Disconnect the electrical power to the unit.
2. Turn off the gas supply.
3. Remove the Header Control Cover (4 screws).
4. Remove the Water Side Top Panel (4 screws).
5. Disconnect the reference pressure hose from the front of the combus-
tion blower assembly.
6. Unlock the natural gas fuel/air mixer by turning it 90°
clockwise
. The
mixer can be turned by applying torque to the hose barb and the boss
feature across from it. The hose barb should point towards the ground
when the mixer is in the unlocked position.
7. Remove the natural gas fuel/air mixer by pulling it straight out from the
combustion blower inlet.
8. Insert the LP fuel/air mixer with the hose barb facing down. Lock the
mixer in place by turning it 90°
counter-clockwise
.
9. Connect the reference pressure hose removed in step 5 to the hose
barb on the newly installed fuel/air mixer.
10. Verify that the mixer being inserted is marked with the correct fuel gas
and the capacity rating matches that on the rating plate of the heater.
11. Verify manifold pressure after converting the unit to operate with Pro-
pane. Instructions for manifold pressure measurements can be found in
the
GAS TESTING
section of this manual on page 31.
12. Close the unit by reversing steps 3 and 4.
13. Fuel gas conversion is completed by applying the field gas conversion
label (supplied in the consumer kit) next to the heater’s rating plate.
Figure 6: Fuel/Air Mixer Removal
