Model LLG & LLD Pool and Spa Heater | Page 13 |
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3.Turn rotary switch to ON. Heater should start.
4.Pry out the top rubber dirt plug.
5.Use a 7/32 inch (5.55 mm) Allen wrench to turn the adjustment screw very slowly clockwise until the heater goes off (see Figure 18).
6.Slowly turn the pressure switch adjustment screw
7.Check the adjustment by turning the filter pump OFF. The heater should shut off immediately. If it does not, restart the filter pump and repeat Steps 6 and 7. Check the adjustment again.
8.Return the pool temperature control to the desired temperature.
2G-7. Automatic Flow Control Valve
The automatic flow control valve maintains the proper flow through the heater at rates up to approxi- mately 125 Gallons Per Minute (GPM) (474 liters per minute [LPM]). If the system
2G-8. Temperature Rise
A temperature rise test confirms proper water flow through the heater. The temperature rise is the difference between the temperature of the pool or spa water before and after heating, as measured in the header. Perform the following temperature rise test when the installation is complete:
1.Make sure the pool filter is clean.
2.Set the rotary switch on the temperature control panel (see Figure 17) to OFF.
3.Turn the filter pump off.
4.Remove the drain plug located on the
5.Insert a pocket thermometer (see Figure 16) through the Pete's plug into the header.
6.Turn the filter pump on and wait 3 minutes. The heater is turned off.
7.Record the temperature indicated by the ther- mometer (cold water).
8.Turn the heater ON following the lighting in- structions found on the inside of the heater.
9.Allow the heater to run for about 3 minutes. Record the new temperature reading (heated water).
Figure 17. Thermometer and pressure relief valve.
10.Subtract the first temperature reading (cold water) from the second temperature reading (heated water). The difference between the two readings is the temperature rise. The temperature rise should be within the range shown in Table 6.
Table 6. Temperature Rise and Minimum Flow Rates
| Minimum | Minimum | Maximum | |||
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Size | GPM | (LPM) | °F | (°C) | °F | (°C) |
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125 | 20 | (76) | 27 | (15) | 36 | (20) |
175 | 20 | (76) | 33 | (19) | 42 | (24) |
250 | 25 | (95) | 33 | (19) | 42 | (24) |
325 | 30 | (114) | 28 | (16) | 38 | (21) |
400 | 30 | (114) | 30 | (17) | 39 | (22) |
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11.If the temperature rise is below the minimum range indicated, two possibilities arise:
a.The supply gas volume is too low.
b.The system's water flow exceeds 125 GPM (474 LPM), and requires a manual bypass valve for proper operation (see Figure 19).
12.If the temperature rise is above the maximum, there is not enough water flowing through the heater. Check for clogging in the water filter or restriction in the water pipes.
Caution
Operation with the temperature rise above maximum or below the minimum can damage the heater and may void the warranty.
13.If the temperature rise is within the correct range, complete the procedure as follows:
a. Turn heater off.
