Modulating reheat
If the controller is configured for modulating reheat, it controls an analog reheat unit with 0-
10 volts DC at the analog reheat output. On a call for reheat, the reheat output is modulated
over the span of the Reheat loop. If the Reheat loop is less than 10%, the reheat output
remains at zero. The reheat is set to zero if the Cooling loop is active.
See the topic
for an application drawing.
Illustration 7–4 Modulating reheat operation
Room temp increase
HTG SP
-2F
HTG SPAN
lo
o
p
%
0
100
10
HTG %
R
e
h
e
a
t
Staged reheat
If the controller is configured for staged reheat, it can control up to three stages of reheat
through binary triac outputs. The reheat outputs are commanded
On
when the Reheat loop
rises above the
ON
threshold and
OFF
when the loop drops below the
OFF
threshold.
Thresholds are described in the following chart,
.
See the topic
for an application drawing.
Heating stages
Output state
On threshold
Off threshold
Stage 1
35%
15%
Stage 2
65%
45%
Stage 3
95%
75%
Table 7–1 Staged reheat thresholds
Section 7: Sequences of operation
KMC Controls, Inc.
58
Revision H
Summary of Contents for SimplyVAV BAC-8001
Page 1: ...SimplyVAV Application and Installation Guide Revision H ...
Page 12: ...Section 1 About the controllers KMC Controls Inc 12 Revision H ...
Page 48: ...Section 6 Application drawings KMC Controls Inc 48 Revision H ...
Page 62: ...Section 7 Sequences of operation KMC Controls Inc 62 Revision H ...
Page 72: ...Appendix A K factors KMC Controls Inc 72 Revision H ...
