TM018 Raypak 131 Type A Pool & Spa Heaters REV: A
D.O.I: 8/04/2009
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8. Upon successful ignition of the burner, the resulting flame impinges on the flame
sensor which generates a DC micro amp (µA) current which is detected by the ignition
module.
If a flame is not detected within 15 seconds from igniter power up, the ignition
module will de-energise the gas valve,
„lock out‟ and require resetting by turning the
controller off for 5 seconds and then turning the controller back on again. If the ignition
module is reset in this manner operation will recommence from step 4.
9. If a flame was detected in step 8, the burner is now operating and will remain lit until
one of the following occurs at which time the gas valve will be de-energised (close):
I. The call for heat ends (water temperature detected by the water temperature
probe is 0.5ºC above the control board set point temperature).
II. The pressure switch contacts open (no water flow).
III. The 45ºC inlet high limit switch contacts open (over temperature condition). Refer
to notes b, c and d below.
IV. The 55ºC outlet high limit switch contacts open (over temperature condition).
V. An external switch or time clock contact opens (if fitted).
VI. Flame failure occurs (ignition module flame sensor does not detect a DC current).
VII. The control board is turned off.
Notes:
a) If the 45ºC inlet high limit contacts are open at the
start
of a call for heat (step 3),
relay 1 will be de-energised and no further operation will take place until the 45ºC
inlet high limit contacts close (cool below 35ºC) at which time the reset indicator
lamp will illuminate. The heater will then require resetting by pressing the red reset
button. Also refer to point d below.
b) If the 45ºC inlet high limit contacts open
during
a call for heat and whilst the burner
is operating (step 9),, relay 1 and the gas valve will be de-energised and no further
operation will take place until the 45ºC inlet high limit contacts close (cool below
35ºC) at which time the reset indicator lamp will illuminate. The heater will then
require resetting by pressing the red reset button. Also refer to point d below.
c) If a call for heat is
not
in progress and the 45ºC inlet high limit contacts are open,
operation of the reset button will reset the heater, however, if the 45 ºC inlet high
limit contacts are still open when a call for heat is initiated no further operation will
take place until the 45ºC inlet high limit contacts close (cool below 35ºC) at which
time the reset indicator lamp will illuminate. The heater will then require resetting as
in step 1.
d)
NOTE:
The reset button cannot reset the heater whilst a call for heat is in progress
and the 45°C Hi Limit contacts are open.
Pump Operation
Pump operation is not controlled by the heater however the pump must be operating for
the burner to ignite. Actuation of the pool/spa pump causes water to flow through the
heater and the resulting water pressure causes the pressure switch contacts to close
enabling operation of the burner control circuit.
