Lochinvar GAS HEATER FOR COMMERICAL POOL APPLICATIONS Commercial Pool Heaters Appendix a

Commercial Pool Heaters

Appendix A

Unit Start Up Checklist

Ensure that the location and installation of the equipment is in accordance with the installation manual, all local installation requirements, and with the latest edition of the National Fuel Gas Code, ANSI 223.1 and/or CAN/CGA-B149 Installation Code.

1.Measure the supply gas pressure. For natural gas models, the supply gas pressure should be between 4.5" w.c. to 10.5" w.c. For LP gas models, the supply gas pressure should be between 8" w.c. to 13" w.c. For a detailed procedure on measuring the supply gas pressure, reference page 28 of this manual.

2.Measure the differential air pressure. The differential air pressure for the 500,000 - 750,000 Btu/hr models should be between 1.5" w.c. to 1.65" w.c. The differential air pressure for 990,000 - 2,070,000 Btu/hr models should be between 1.1" w.c. to 1.3" w.c. Reference pages 49 and 50 of this manual for the proper procedure for measuring the differential air pressure. If an adjustment is necessary follow the procedure on page 50 of this manual.

Note: The combustion air fan(s) is factory preset and should not need adjustment. However, due to installation and environmental conditions adjustment of the air fan shutter(s) may be necessary at start up.

3.Measure the net manifold gas pressure. For 500,000 - 750,000 Btu/hr models the net manifold gas pressure for natural gas models should be 1.8" w.c For LP gas models the net manifold gas pressure should be 4.6" w.c. For 990,000 - 2,070,000 Btu/hr models the net manifold gas pressure for natural gas models should be 1.2" w.c. For LP gas models the net manifold gas pressure should be 4.6" w.c. For the proper procedure for measuring net manifold gas pressure, reference page 30 of this manual. If an adjustment of the net manifold gas pressure is necessary, follow the procedure on page 30 of this manual.

Note: The gas valves are factory preset and should not need adjustment. However, due to installation and environmental conditions adjustment of the gas valves may be necessary for start up.

4.For negative draft vent systems, measure the draft in the vent stack. The negative draft should be between -.02 w.c. to -.08 w.c. Reference pages 10 - 26 of this manual to determine which venting system is in use.

Note: For positive pressure venting systems a draft measurement is not required. Ensure that the vent length does not exceed the maximum lengths listed in the Installation and Service Manual.

5.Adjust the temperature set point on the digital temperature control to the desired pool temperature. Reference pages 40 and 41 of this manual for information regarding the operation and adjustment of the digital temperature control.

6.A 3-way automatic bypass valve is factory installed to maintain a minimum temperature of 130° to the inlet of the pool heater to protect against flue gas condensation. Manual adjustment of the valve is not required.

Note: If the inlet temperature of the pool heater can not be maintained at 130°, reference pages 33, 34, and 46 of this manual to ensure that the pipe size and piping arrangements are correct.

If problems arise during the start up, reference the Installation and Service Manual and/or consult the factory.

58