Orion-system VCM-X/RNE Controller Manuale Utente Scaricare il pdf (Pagina 51)

VCM-X / RNE Operator Interface SD

VCM-X / RNE SETPOINTS

Setpoint Screen #24 - Building Pressure

VCM-X / RNE Spts

Building Pressure

Setpoint....: 0.10”

Deadband....: 0.02”

Direct Acting Control

If an Exhaust Fan Relay is conﬁ gured, when the Building Static Pres-

sure rises above the Building Pressure Setpoint plus the Deadband, the

Exhaust Fan Relay will activate. It will remain on until the Building

Pressure falls below the Building Pressure Setpoint minus the Deadband.

If Modulating Building Pressure is conﬁ gured, when the Building Static

Pressure rises above the Building Pressure Setpoint plus the Deadband,

the Building Pressure Output Signal will increase until the Building Static

Pressure falls within the Deadband. If the Building Static Pressure falls

below the Building Pressure Setpoint minus the Deadband, the Building

Pressure Output Signal will decrease until the Building Static Pressure

rises within the Deadband. The Building Pressure Output Signal is con-

ﬁ gurable for 0-10 or 2-10 VDC. For more detailed operation information,

see the VCM-X Controller Technical Guide, VCM-X Modular E-BUS

Controller Technical Guide, or RNE Controller Technical Guide for the

complete Building Pressure Control Sequence of Operation.

Reverse Acting Control

The Building Pressure Output Signal remains a Direct Acting 0-10 or

2-10 VDC signal, but the logic is reversed. On a drop in Building Static

Pressure below the Building Pressure Setpoint minus the Deadband, the

Building Pressure Output Signal will increase.

Description Min. Default Max.

Building Pressure Spt -0.20″ WG 0.10″ WG 0.20″ WG

Building Pressure

Deadband

0.01″ WG 0.02″ WG 0.10″ WG

Setpoint Screen #25 - RAB Damper Factor

VCM-X / RNE Spts

Return Air Bypass

Damper Factor

Setpoint..: 40%

This setpoint is used when your HVAC unit is conﬁ gured for Return

Air Bypass Damper control. The Return Air Bypass Damper Factor

Setpoint is a percentage value that is used to calculate the Return Air

Damper position in relation to the Return Air Bypass Damper position.

This provides a method for adjusting the airﬂ ow through the Return

Air Bypass Damper.

Increasing this percentage increases the airﬂ ow through the Return Air

Bypass Damper by causing the Return Air Damper to move further

towards its closed position in relation to the Return Air Bypass Damper

moving towards its open position.

Decreasing this percentage decreases the airﬂ ow through the Return

Air Bypass Damper by causing the Return Air Damper to move further

towards its open position in relation to the Return Air Bypass Damper

moving towards its closed position.

Description Minimum Default Maximum

Return Air Bypass

Damper Factor

0% 40% 100%

Setpoint Screen #26 - Supply Fan Starting

Delay Timer

VCM-X / RNE Spts

Fan Starting Delay

Timer...: 255 s

This is the Supply Fan Starting Delay Timer initiated whenever the

Unit Controller initiates Supply Fan operation. This is useful when you

are using multiple HVAC units and want to be sure that all the units do

not start at exactly the same time when the Occupied schedule occurs.

Each Unit Controller should be set with staggered Fan Starting Delay

Timer Setpoint values. When the 255 Second default setpoint is used,

it multiplies each Unit Controller’s address by 5 and uses this value in

seconds as the Fan Starting Delay Time. This provides a staggered start

for each Unit Controller on the system without having to individually

set each Unit Controller for its own time delay. For an MUA unit, this

should be set to a minimum of 60 seconds to let the OA Damper open.

Description Minimum Default Maximum

Fan Start Delay Timer 0 Sec 255 Sec 255 Sec

Setpoint Screen #27 - Mechanical Heat/Cool

Failure Time Period

VCM-X / RNE Spts

Mechanical Heat/Cool

Failures Occur After

No Change In 15 Min

When Heating or Cooling Mode is initiated and staging is activated, if the

Supply Air Temperature does not rise or fall 5°F within the Mechanical

Heat/Cool Failures Occur After No Change For Setpoint time period,

a Mechanical Heating or Cooling failure alarm will be generated. The

Alarm is for Status Reporting only. The HVAC unit will continue to run.

Description Minimum Default Maximum

Mechanical Heat/Cool

Failures Occur After

No Change For

0 Min 15 Min 255 Min

VCM-X / RNE Setpoint Screens

1 2 ... 46 47 48 49 50 51 52 53 54 55 56 ... 91 92

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Orion-system VCM-X/RNE Controller Manuale Utente Pagina 51

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