To Turn Off Gas To Pool Heater; Pre-Start Checklist; Starting The Filter System - Lochinvar GAS HEATER FOR COMMERICAL POOL Installation And Service Manual

Commercial Pool Heaters
Figure 42 – ON/OFF Switch
8. Turn the manual gas cock clockwise
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
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
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

to the "OFF"
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
to the "ON"
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
to the "OFF"
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.
39