TM018 Raypak 131 Type A Pool & Spa Heaters REV: A
D.O.I: 8/04/2009
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14
Operational Flow Chart 1
Reset button
pushed &
released?
YES
Water temp < set
temp - 1ºC?
YES
YES
External switch or
time switch
closed? (if fitted)
NO
YES
NO
Water pressure
switch closed?
55º high limit
contacts closed?
YES
NO
2
3
5
HEATER OPERATION
Control board set
to „Manual‟?
Is time within auto
set time period?
NO
YES
YES
NO
Power supplied to
heater
Control board
turned on?
NO
45º high limit
contacts closed?
NO
YES
YES
C
YES
(1) Control board is turned on by pressing
&
releasing the „power‟ button.
Heater fitted with
auto reset PCB?
Auto reset safety
circuit board resets
D
Reset button
pushed &
released?
YES
NO
NO
(1)
YES
E.I.B. OPERATION
Control board set
to „Manual‟?
Start
NO
Is time within
auto set time
period?
NO
Aux 2
enabled?
Aux 3
enabled?
Aux 4
enabled?
Aux 5
enabled?
Aux 6
enabled?
YES
YES
A
B
YES
NO
A
B
YES
NO
A
B
YES
NO
A
B
YES
NO
A
B
YES
NO
A
B
YES
NO
A
B
Dotted line denotes optional
electronic interface box (E.I.B.)
Disabled Aux relay(s)
de- energised
Enabled Aux relay(s)
energised
Control board set to
„AUTO‟
4
C
Relay 1 de-energised
Reset lamp
illuminates
45º high limit
contacts close
when temp < 35º
Gas valve de-energised
if on (pilot & main valve
close)
Heater Fitted with
auto reset PCB?
Auto reset safety circuit
board open circuits gas
valve circuit
YES
NO
Heater fitted
with auto
reset PCB?
D
NO
YES
NO
NO
Reset lamp
illuminates
Relay 1 energised
Reset lamp
extinguished
Relay 2 energised
Control board initiates
call for heat
Control board set to
„AUTO‟
Aux 1
enabled?
