DIVEX MHE-02, Installation, Operating And Maintenance Manual

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Chapter 1
KI-OM-523 R2
1.3.5 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
The grouping of the heater elements into banks allows the sequential switching of the banks,
reducing the instantaneous load on the supply. As heater banks have separate control
circuits and protection, the failure of any single bank of heaters will not effect the operation of
the other banks.
Bank
No. Switch
No. Element
Grouping No. Circuit
Breaker
ID Contractor
ID Element
Grouping
kW Element Grouping Com-
position
1 1 Heater 1.1 MCB2 C2 13.5 kW 3 x 4.5 kW Elements
2 2 Heater 2.1 MCB3 C3 27.0 kW 3 x 4.5 kW Elements and
Heater 2.2 3 x 4.5 kW Elements
3 3 Heater 3.1 MCB4 C4 27.0 kW 3 x 4.5 kW Elements and
Heater 3.2 3 x 4.5 kW Elements
Heater 3.3 MCB5 C5 27.0 kW 3 x 4.5 kW Elements and
Heater 3.4 3 x 4.5 kW Elements
NOTE: Bank 3 provides a total of 54 kW of heating.