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7.
Slowly turn the pressure switch adjustment
screw
counterclockwise
one-quarter turn. The
heater should come back on.
8.
Check the adjustment. Press the SELECT key to
turn the heater 'OFF'. Turn off the power to the
heater at the breaker. Unplug the pump relay
from the power circuit board. Restore power to
the heater. Press the SELECT key to set the
heater to 'POOL'.
The heater must not come
on.
If the heater does start the firing sequence,
immediately press the SELECT key to turn the
heater off, disconnect power to the heater, plug
the pump relay into the power circuit board and
restore the power to the heater. Then repeat
Steps 6 and 7. Check the adjustment again.
When the adjustment has been checked and
verified, press the SELECT key to turn the
heater off, disconnect power to the heater, plug
the pump relay into the power circuit board and
restore the power to the heater.
9.
Return the pool temperature control to the
desired temperature. Repeatedly depress the
MODE key until the indicator at the top of the
display shows 'POOL SET'. Press the ENTER
key. Then use the UP and DOWN keys to set
the heater to the desired temperature. Press the
ENTER key again.
7.7. 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 controller to 'OFF' by repeatedly depress-
ing the SELECTION key until the display shows
that the heater is 'OFF'.
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)
Table 7. Temperature Rise and Minimum Flow Rates
3.
If the filter pump is on, turn it off by pressing the
PUMP key and allow up to five minutes for the
pump to shut down.
4.
Turn off the power supply to the heater at the
circuit breaker panel.
5.
Remove the drain plug located on the inlet/outlet
header of the heater and replace it with a Pete's
plug (see Figure 14).
6.
Insert a pocket thermometer (see Figure 14)
through the Pete's plug into the header.
7.
Turn the circuit breaker on to supply the heater
with power.
8.
Turn the filter pump on and wait 3 minutes. The
heater remains off. This allows water from the
pool to reach the heater.
9.
Record the temperature indicated by the ther-
mometer (cold water).
10. Set the pool temperature control to the maximum
setting. Repeatedly depress the MODE key until
the indicator at the top of the display shows
'POOL SET'. Press the ENTER key. Then use
the UP key to set the temperature to 104°F
(40°C). Press the ENTER key again.
11. Set the controller to 'POOL' by repeatedly
depressing the SELECTION key until the display
shows that the heater is set to 'POOL'. The
heater should start.
12. Allow the heater to run for about 3 minutes.
Record the new temperature reading (heated
water).
13. 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 tempera-
ture rise should be within the range shown in
Table 7.
Figure 20. Pressure Switch Adjustment.
14. If the temperature rise is below the minimum
range indicated, two possibilities arise:
a. The supply gas volume is too low.
