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3.2 Initial Start-Up
WARNING
Do not use this appliance if any part has
been under water. Immediately call a qualified
service technician to inspect the heater. The
possible damage to a flooded appliance can
be extensive and present numerous safety
hazards. Any appliance that has been under
water must be replaced.
Newly constructed pools may have low pH,
and higher levels of calcium hardness or construction
debris. Do not allow pool water to circulate through
the pool heater until the water has been filtered to
remove all debris and the chemical balance of the
water has been adjusted to a stable pH of 7.2 to 7.8.
After the pool water is filtered, and the pH is verified
at 7.2 to 7.8, verify that the chlorine or bromine
residual is no more than 2.0 to 4.0 ppm, the total
alkalinity is 80 - 120 ppm and the calcium hardness is
between 200 - 400 ppm. Corrosion and/or 'liming' of
the heat exchanger is possible when these levels are
not maintained and the heater is fired.
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 14).
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 lever (see Figure 15), light pilot and
keep relay lever 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, and 11 -
(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
Figure 15. Pilot Safety Relay.
Pilot Relay Manual
Reset Switch
(Standing Pilot Systems)
Figure 14 - Manual Gas Valves.
Pilot Valve
Main Gas Valve
Pilot Valve
Main Gas Valve
ON POSITION
OFF POSITION
LAARS Heating Systems
