Commercial Pool Heaters
Figure 42 – ON/OFF Switch
8.Turn the manual gas cock clockwise to the “OFF” position.
9.Wait five (5) minutes to clear out any gas. If you smell gas, STOP! Follow What To Do If You Smell Gas in the safety information. If you don’t smell gas, go on to the next step.
10.Turn the manual gas cock counterclockwise to the “ON” position.
11.Turn the power switch to the “ON” position.
12.Slide the control panel assembly back into the pool heater. Tighten the knurled screw at the bottom of the control panel cover.
13.If the pool heater will not operate, follow the instructions “To Turn Off Gas To Appliance” and call your service technician or gas supplier.
To Turn Off Gas To Pool Heater
1.Open the front access panel to access the control panel.
2.Turn the power switch to the “OFF” position.
3.Turn the manual gas cock clockwise to the “OFF” position.
WARNING: Should overheating occur or the gas fail to shut off, turn off the manual gas control valve to the pool heater.
Figure 43 – Combination Gas Valve
Pre-Start Checklist
Before attempting to start the pool heater verify that the following items have been checked:
1.Verify proper location and installation of the pool heater.
2.Check gas piping and ensure the gas line is purged of all air.
3.Ensure that the pool is properly filled.
4.DO NOT operate pool heater if improperly filled.
5.Check to ensure that all water connections are tight.
6.Relief valve has been piped to a suitable floor drain.
7.Combustion air openings are not obstructed in any way.
Starting the Filter System
Verify proper installation of the pool heater temperature controls and the installation of the 110°F auxiliary limit and pool supply sensor in the mixed discharge water from the filter piping to the pool. Clean the filter. Start the filter pump. Be sure all air is out of all the lines including the pressure connection. Ensure that the pool heater is not “air bound” by manually opening the temperature and pressure relief valve. Leave the valve open until a steady flow of water is observed at the discharge from the valve. Close the valve and complete filling the system.
Note: Backwash the filter when the G.P.M. filtration rates are too low to meet local codes or state code. A high temperature rise across the pool heater is also an indication of low flow in the filter system. Sustained low flow to the pool heater will result in cycling of the heater on the limit controls and possible opening of the relief valve.
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