8
Chapter 1
KI-OM-6768 R0
Component
Component ID
Function Description
Contactor 1
C1
Pump contactor coil
Contactor 2-10
C2-C10
Heater contactor coils
Hour Meter
H1
The hour meter records the running hours of the pump and is
wired through the auxiliary contact on the pump contactor C1/1.
Run Light (Green)
Motor On
L1
Local indication that the pump motor contactor is operational and
power is supplied to heater switches. Wired to the normally open
contact of the start switch S2NO and the auxiliary C1/1 of the
motor contactor C1.
Run Light (Green)
Motor On
L2
Remote indication that the pump motor contactor is operational
and power is supplied to heater switches. Wired to the normally
open contact of the start switch S2NO and the auxiliary C1/1 of
the motor contactor C1.
Run Light (Green)
Heater Bank On
L3-L7
Lamp indication of heater bank power on.
Fault Light (Red)
Pump Overload
L8
Lamp indicating pump fault/overload trip. Wired to contact R5/1
of relay R5.
Fault Light (Red)
Over Temperature
L9
Lamp indication of system over temperature fault wired to the
relay contact R1/2 of relay R1.
Fault Light (Red)
Low Level
L10
Lamp indicating low water level fault. This fault is linked to the
contact R2/2 of the low level relay R2.
Power On (White)
Indication
L11
Lamp indicating 24 VDC power to control circuit form the 24V
power supply.
Fuse
Transformer
Supply
F1 & F2
Fuses for short circuit protection or overload of the supply to the
power supply unit.
Fuse
Control Circuit
F3 & F4
Fuse for short circuit protection or overload of the supply from
the power supply unit to the control circuit.
Pump Overload
O/L1
This overload trips if the pump draws excessive current. The
normally open contact of the overload supplies the pump run
indication. The normally closed contact of the overload is used
in the safety circuit.
Fault Relay
Over Temperature
R1
Fault relay de-energizes during fault when the over temperature
relay R3 or the thermostat contacts are open. The over
temperature relay is interlocked with its normally open R1/3
contact.
Содержание KI40018AA
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