Filter
Top Products
Pentair Water Commercial Pool and Spa
Page 12
On a newly constructed pool, be sure to run the
filter pump long enough for a complete “turn-over” of
the pool water before starting heater so that dirt and
residue from construction will have been removed.
The filter may clog rapidly during this period, causing
severe cycling of the heater.
1. Before placing the heater in operation, be certain
that the heater is filled with water and that all air
is purged from the system. Open all the valves in
the secondary piping.
2. With the filter pump running, run the heater
pump in manual “CONSTANT PUMP” for
minimum of 10 minutes and listen for the flow
switch to make as the pump is started. Loosen
the pipe plug on the top of the pump scroll
casting to bleed off any air. NOTE: If the system
will be operated in a manner that causes air to be
drawn into the heater and the secondary piping,
an automatic float type air vent should be
permanently installed on top of the pump scroll.
3. To check the heater firing, proceed as follows:
a. Turn off the power switch.
b. Turn off all manual gas valves and wait
five minutes (Figure 13).
c. Set operating control to the lowest setting.
d. After placing the manual pilot gas valve in
the open position and resetting all safety
devices (high limit, low water cutoff, etc.),
the pilot(s) can be lit following the
procedure on the heater rating plate.
e. For standing pilot system, press on pilot
relay knob (see Figure 15), light pilot and
keep relay knob depressed for one minute
then release. Once the pilot is lit, turn
power switch to “AUTO PUMP.”
f. Wait 5 minutes and turn up operating control
until heater fires (for intermittent ignition
system, the pilot will be ignited automatically).
The main burners should ignite smoothly. Turn
the operating control back to the lowest setting.
NOTE:
DO NOT OPERATE HEATER UNTIL
THE FOLLOWING SAFETY CHECKS HAVE
BEEN PERFORMED.
3.3 Safety Shutoff Component Checkout
1. Once the pilot(s) is lit and has been established
for five minutes, the flame failure response time
should be checked as follows:
Systems 4 and 9 - (intermittent ignition). With this
system pilots are automatically lit when the operating
controls call for heat. If the pilot flame fails for any
reason, the main valve is shut off within one second
and the pilot spark ignition is initiated until the pilot
flame has been reestablished. This sequence should be
checked by turning off the manual pilot gas valve (see
Figure 14), and, at the same time, monitoring the
audible sparking at the pilot burner and signal
interruption to the main valve.
Caution
Propane gas is heavier than air and sinks to
the ground. Exercise extreme care in lighting
the heater when so equipped.
System 16 - (electronically supervised standing pilot
system). Extinguish the pilot flame by placing the
manual pilot valve in the closed positions (see
Figure 14), and at the same time, begin recording the
time it takes for the output signal from the electronic
ignition control to be interrupted. The signal
interruption can be detected either with a test light or a
voltmeter. The response time should never exceed one
second.
2. Hi-Limit Checkout. For spas see Section 3.9. The
manual reset high limit is factory preset to 150°F
(66°C). Confirm this set point on the unit and
adjust if necessary. After running the heater in a
firing mode for 10 minutes, slowly close the
outlet valve “A” to raise the outlet temperature as
indicated on the outlet thermometer. The high
limit should trip within 2°F (1°C) or 3°F (2°C) of
the 150°F (66°C) setpoint and shut off the
burners. If this does not occur, adjust the set
point on the unit to shut off the burners when the
outlet thermometer reads 150°F (66°C). Open the
outlet valve “A” and push the reset button. The
main burners should reignite.
3. Flow Switch: See attached vendor literature.
4. Low Water Cutoff (optional): See attached
vendor literature.
3.4 Inlet Temperature and Temperature
Rise Adjustment
For proper operation the bypass and outlet valves
must be adjusted to obtain the correct heater
temperature rise. Use the following method to set the
bypass assembly at start up:
1. With all bypass valves open, fire the heater for at
least 10 minutes. The operating control should
be set at least 5° to 10° F above the pool
temperature to ensure continued operation
throughout this set up procedure.
2. Observe the thermometer on the inlet header. To
prevent condensation and damage to the boiler,
the inlet water temperature has to be 100°F.