Assortment / System Description

VAV application
Electric heating coil
18
138 | 275 A6V10866237_en--_b_08
18.27 Electric heating coil
One electric heating coil can be configured for VAV applications. The DRX2
automation station controls electric heating coils via Triac or analog outputs,
regardless of available I/Os. Single-stage, 2-stage, 3-stage, and modulating
electric heating coils are supported.
Figure: Example of a VAV application with electric heating coils
Key:
DXR2… Automation station R1 Room operator unit
YS Supply air VAV D1 Presence
YR Electric heating coil D2 Window contact
T Over temperature contact
Y Output signal TR Room temperature
YH1 1 stage SpH Effective heating setpoint
YH Electric heating coil
Figure: 1-stage electric heating coils
Plant diagram
Sequences