JFD KI40018AA, Operation And Maintenance Manual, Page: 14 / 110

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Chapter 1
KI-OM-6768 R0
1.3.4 Heater System and Heater Selection
The heaters are arranged into heater banks comprised of groups of heater elements. Each heater
bank is controlled by a switch mounted in the control panel. The switch supplies 24V to the coil of
the contactor/s of the relevant bank. The following table shows the control structure of the heater
banks and the composition of the heater groups.
Table 1.1 Heater Component Identification
N
OTE
The total heater bank capacity is the combined capacity of the related element grouping. (e.g.
Heater bank 5 = Group 5.1 +Group 5.2 = 24 kW + 24 kW = 48 kW)
The grouping of heater elements into banks allows the sequential switching of the banks, reducing
the instantaneous load on the power supply. Additionally, as heater banks have separate control
circuits and protection, the failure of any single bank of heaters will not affect the operation of the
other banks.
Bank
No. Switch
No. Element
Grouping No. Circuit
Breaker ID Contactor
ID Element
Grouping
kW Element Grouping
Composition
1 1 Heater 1.1 MCB3 C2 13.5 kW 3 x 4.5 kW Elements
2 2 Heater 2.1 MCB4 C3 13.5 kW3 3 x 4.5 kW Elements
Heater 2.2 MCB5 C4 13.5 kW3 3 x 4.5 kW Elements
3 3 Heater 3.1
Heater 3.2 MCB6 C5 25.5 kW 3 x 4.0 kW Elements and
3 x 4.5 kW Elements
Heater 3.3 MCB7 C6 13.5 kW 3 x 4.5 kW Elements
4 4 Heater 4.1
Heater 4.2 MCB8 C7 25.5 kW 3 x 4.0 kW Elements and
3 x 4.5 kW Elements
Heater 4.3
Heater 4.4 MCB9 C8 24.0 kW 3 x 4.0 kW Elements and
3 x 4.0 kW Elements
5 5 Heater 5.1
Heater 5.2 MCB10 C9 24.0 kW 3 x 4.0 kW Elements and
3 x 4.0 kW Elements
Heater 5.3
Heater 5.4 MCB11 C10 24.0 kW 3 x 4.0 kW Elements and
3 x 4.0 kW Elements