Lochinvar 502, 2072 Check thermostat circuits, Check vent and air piping, Start the pool heater

6 Startup

If freeze protection is not provided for the system, a low ambient temperature alarm is recommended for the equipment room. Damage to the pool heater by freezing is non-warrantable.

1.Pump Operation - MOST IMPORTANT - This pool heater is designed for continuous operation of the filter system pump when the burners are firing. If the system pump does not run continuously, an interlock mechanism should be provided to disable when/if the system pump turns off. The constant flow of warm pool water can help prevent freezing.

2.Anytime the temperature measured at the sensor drops below 45°F, the temperature control turns on the pump to circulate the water, if the pump option is installed.

3.Location - Indoor pool heaters must be located in a room having a temperature safely above freezing [32°F(0°C)].

4.Outdoor Pool Heater Installation - Use extreme caution to prevent freezing. A snow screen should be installed to prevent snow and ice accumulation around the pool heater or its venting system.

5.Shut-Down and Draining - If for any reason, the pool heater is to be shut off, the following precautionary measures must be taken:

a.Shut off gas supply;

b.Shut off water supply;

c.Shut off electrical supply;

d.Drain the pool heater completely. Remove the threaded drain plugs from the inlet and outlet sides of the front header on the heat exchanger (see FIG.’s 4-1 and 4-2). Blow all water out of the heat exchanger. Leave drains open until Spring.

e.Drain pump and piping.

Check thermostat circuit(s)

1.Disconnect the two external wires connected to the enable terminals on the connection board.

2.Connect a voltmeter across these two incoming wires. Close each thermostat, and relay in the external circuit one at a time and check the voltmeter reading across the incoming wires.

3.There should NEVER be a voltage reading.

4.If a voltage does occur under any condition, check and correct the external wiring.

5.Once the external thermostat circuit wiring is checked and corrected if necessary, reconnect the external thermostat circuit wires to the connection board. Allow the pool heater to cycle.

Check vent and air piping

Inspect vent piping and air piping for signs of deterioration from corrosion, physical damage or sagging. Verify air piping and vent piping are intact and correctly installed per this manual.

Installation & Operation Manual

Placing the pool heater in operation

Pool heater operational checks

1.Turn the pool heater main power switch to the “ON” position.

2.Verify operation of the SMART SYSTEM control module and Operator Interface.

3.Program the adjustable points from the Operator Interface.

4.Push the reset for the low water cutoff (if equipped).

5.Ensure that flow requirements and approximate temperature rises shown in Table 4B on page 35 are met. Verify by checking rises while the unit is at 100% of rated input.

6.Install a manometer on the gas supply to the pool heater and verify minimum gas supply pressure as the burner fires at 100% of rated input.

7.Verify operation of safeties as necessary (low water cutoff, high limit, gas pressure, etc.,).

8.Verify that all adjustable points in the Operator Interface are set as required.

9.Once the pool heater analysis is complete, test the safety shutoff device by turning the manual shutoff valve to the OFF position and ensuring that the pool heater shuts down and registers an alarm. Open the manual shutoff valve and reset the control.

10.Place the pool heater back into normal operation.

Pool heater operation

11.The pool heater should begin the start-up process for the sequence of operation.

12.The pool heater will ignite at the proper ignition speed and will stage to meet the system demand.

13.Ensure that inlet water temperature does not fall below the specified minimum for the pool heater.

14.Based on system demand, pool heaters may run for an extended period of time at a reduced rate of input to maximize efficiency.

15.As system demand is satisfied, the burner will cycle off and the combustion air blower will run for a post purge operation before the pool heater shuts down.

Start the pool heater

Read and follow the Lighting Instructions in FIG. 6-2, on page 47.

If pool heater does not start correctly

1.Check for loose connections, blown fuse or service switch off?

2.Is the unit in lockout? Is the pool heater outlet temperature exceeding 200°F (93.3°C)?

3.Is the thermostat set below pool water temperature?

4.Is gas turned on at meter or pool heater?

5.Is incoming gas pressure less than 4.5" water column?

If none of the above corrects the problem, refer to the Troubleshooting Section of the Copper-fin2Service Manual.

￿ WARNING

46

The venting system must be installed so that it will prevent flue gas spillage and carbon monoxide emissions, which will result in severe personal injury or death.