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Installation & Operation Manual
10 Ladder diagram
BLOWER
N
ON/OFF
SWITCH
F2
3.15A
BOX DEPICTS
OPTIONAL ITEMS
120 VAC
LOW VOLTAGE
TERMINAL
STRIP
BLOWER
RELAY
HI/LO SPEED
RELAY
HI/LO SPEED
RELAY
HIGH
SPEED
LOW
SPEED
GL
N
UNIT PUMP
RELAY
X1
-6
F4
5A
BLOWER RELAY
X1-8X1-8X1-8
HI/LO SPEED RELAY
X2-4
X1-2
UNIT PUMP RELAY
X1-1
X1-4
TERMINAL
STRIP
TERMINAL
STRIP
SYSTEM /
RECIRC
PUMP RELAY
DHW PUMP
RELAY
(BOILER)
CHASSIS
X1-7
X2-1
X1-10
X2-2
X1-3
F5
5A
F6
5A
STAGE 1 HSI
STAGE 3 HSI
X1-12
X1-2
X1-3
X1-1
MODBUS INTERFACE BOARD
CIRCUIT BREAKER OR FUSE
TRANSFORMER
INTERGRATED CONTROL BOARD
X10-1
X12-1
X10-2
X10-3
X12-2
X12-3
STAGE 1 GAS VALVE
STAGE 2 GAS VALVE
STAGE 3 GAS VALVE
STAGE 4 GAS VALVE
X10-5
X10-6
X12-5
X10-4
X12-4
MANUAL RESET
HIGH LIMIT
X6-4
X12-6
CIRCUIT BREAKER
INTERGRATED
CONTROL
BOARD
TRANSFORMER
WHERE POSSIBLE, SWITCHES ARE SHOWN WITHOUT UTILITIE
S (GAS,
WATER OR ELECTRICITY) CONNECTED TO THE UNIT. AS SUCH, ACTUAL
SWITCH STATES MAY VARY FROM THOSE SHOWN ON DIAGRAMS
DEPENDING UPON WHETHER UTILITIES ARE CONNECTED OR A FAULT
CONDITION IS PRESENT. SEE WIRING DIAGRAM FOR ADDIT
IONAL NOTES.
NOTE: Not all connections/features apply to pool heaters.