KMC Controls SimplyVAV BAC-8001 User Manual

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 Modulating reheat on page 44 for an application drawing.
Illustration 7–4 Modulating reheat operation
Room temp increase
HTG SP-2F
HTG SPAN
loop %
0
100
10
HTG %
Reheat
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, Staged reheat thresholds on page 58.
See the topic Staged reheat on page 43 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

KMC Controls SimplyVAV BAC-8001 Specifications

General

Brand	KMC Controls
Model	SimplyVAV BAC-8001
Category	Controller
Language	English