Kmc-controls BAC-8007 Installation Guide Instrukcja Użytkownika Strona 67
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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 52 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 67.
See the topic Staged reheat on page 51 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
Time proportioned reheat
For controllers configured for time proportional reheat, the duty cycle of a
binary triac output varies over a 10 second period. For example, if the Reheat
SimplyVAV Section 7: Sequences of operation
Revision E 67
- SimplyVAV 1
- KMC Controls, Inc 2
- C o n t e n t s 3
- Appendix A: K-factors 83 4
- Index 85 4
- Specifications 7
- Communications—BACnet MS/TP 8
- Air flow sensor features 8
- Actuator specifications 8
- Regulatory 9
- Installation 9
- Environmental limits 9
- Dimensions 10
- Accessories and 11
- Available models 12
- 14 Revision E 14
- Setting the rotation 16
- Mounting on a VAV 17
- Connecting an 18
- Connecting inputs 18
- Connecting room 19
- Connecting a DAT 20
- Connecting power 21
- Maintenance 22
- 1 Starting display 23
- 2 Enter Password 1 24
- 3 Set the active cooling 24
- 4 Set the active heating 24
- Getting started with 26
- Entering system 27
- 10 Set the minimum 30
- 11 Set the standby 30
- 12 Select a new 30
- Configuring the VAV 31
- Box options 31
- 6 Set the fan option 33
- 7 Set the damper direction 33
- 8 Select a new 33
- Set the airflow 34
- 2O 36
- Advanced options 37
- 8 Set the automatic 39
- 9 Set the temperature 39
- 10 Select a new 39
- Restore Application 40
- 2 Select the restore settings 41
- 3 Choose the application 41
- 42 Revision E 42
- 2 Select the CNFG display 44
- 3 Measure and enter the 45
- 4 Measure and enter the 45
- 5 Advance or exit 46
- 6 Measure and enter the 46
- 7 Measure and enter the 47
- 8 Advance or exit 47
- 48 Revision E 48
- Cooling or heating 50
- Advanced 51
- Dual-duct 55
- 56 Revision E 56
- Input sources 58
- Occupancy 59
- Space setpoints 60
- PID control loops 61
- Airflow setpoints 61
- Changeover 62
- Discharge Air 62
- Temperature (DAT) 62
- System diagnostics 64
- Damper operation 65
- Fan operation 65
- Reheat sequence 66
- Staged reheat 67
- Time proportioned reheat 67
- Floating reheat 68
- Balancing airflow 69
- Dual duct 69
- 70 Revision E 70
- Connecting to an 72
- MS/TP network 72
- Network bulbs 73
- Setting up network 75
- 5 Enter the baud 76
- 6 Advance or exit 76
- BACnet objects 77
- Value objects 78
- Object Name Description 79
- Loop objects 80
- LOOP2 HT LOOP Heating Loop 81
- Revision E 81 81
- 82 Revision E 82
- Duct size in inches K-factor 83
- 84 Revision E 84
- Index SimplyVAV 88
- 88 Revision E 88
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