Waterpik Technologies LG, LD 2G-7. Automatic Flow Control Valve, 2G-8. Temperature Rise

Page 14 WATERPIK TECHNOLOGIES INC.

a) Model LD Temperature Control

b)Model LG Temperature Control

Figure 18. Temperature controls.

Figure 19. Pressure switch adjustment.

NOTE: Heater should not be allowed to fire on low speed.

4.Turn rotary switch (LD) or rocker switch (LG) to ON. Heater should start.

5.Pry out the top rubber dust plug on the top of the pressure switch.

6.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 19).

7.Slowly turn the pressure switch adjustment screw counterclockwise one-quarter turn. The heater should come back on.

8.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.

9.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 filter-flow rate is higher than approximately 125 GPM (474 LPM), install a manual bypass valve (see Figure 20), then perform a temperature rise test (see Section 2G-8) and adjust the flow using the bypass valve until the proper tempera- ture rise is obtained.

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 (LD) or rocker switch (LG) on the temperature control panel (see Figure 18) to OFF.

3.Turn the filter pump off.

4.Remove the drain plug located on the inlet/outlet header of the heater and replace it with a Pete's plug (see Figure 17).

5.Insert a pocket thermometer (see Figure 17) through the Pete's plug into the header.

6.Turn the filter pump on and wait 3 minutes. The heater remains off. This allows water from the pool to reach the heater.

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).

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
Size	GPM	(LPM)	°F	(°C)	°F	(°C)
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)