Orion-system PT-Link-LON Manual do Utilizador descarregar pdf (Página 23)

PT-Link Interface

PT-Link-LON

®

Technical Guide

23

Appendix D - VCM-X LON Parameters

SNVTs for the VCM-X Controller

Binary Output SNVTs are SNVT_lev_disc

all other SNVTs are SNVT_count_inc_f

Parameter Name Object Description

Limits

Warm Up

Setpoint

WmupSt Analog

Input

In a VAV

application, upon

entering the

occupied mode,

the Warm-up

Demand will be

activated if the

return air tem-

perature falls one

degree below this

setpoint.

Wet Bulb

Setpoint

WtblSt Analog

Input

The economizer is

enabled if the

outdoor tempera-

ture or wetbulb

falls below this

setpoint.

080

Coil

Temperature

Setpoint

CoilTpSt Analog

Input

This is the coil

suction tempera-

ture target during

dehumidiﬁ cation

mode. Produces

dewpoint in the

supply air

approximately

10°F above this

setpoint.

35 70

Relief

Pressure

Setpoint

RfPrSt Analog

Input

This is the target

building pressure

to be maintained

by the VFD Relief

signal.

-0.2 0.2

Indoor

Humidity

Setpoint

InRhSt Analog

Input

If the indoor

humidity rises

above this set-

point, the unit will

activate the

Dehumidiﬁ cation

Demand.

0 100

Unoccupied

Cooling

Offset

UnClOst Analog

Input

During the

Unoccupied Mode

of Operation, this

Setpoint spreads

the Occupied

Cooling Setpoint

out by a user

adjustable amount.

If you do not want

Cooling to operate

during the

Unoccupied

Mode, use the

default setting

of 30°F for these

setpoints.

030

SNVTs for the VCM-X Controller

Binary Output SNVTs are SNVT_lev_disc

all other SNVTs are SNVT_count_inc_f

Parameter Name Object Description

Limits

Unoccupied

Heating

Offset

UnHtOst Analog

Input

During the

Unoccupied Mode

of Operation, this

Setpoint spreads

the Occupied

Heating Setpoint

out by a user

adjustable amount.

If you do not want

Heating to operate

during the Unoc-

cupied Mode, use

the default setting

of 30°F for these

setpoints.

030

CO

2

Setpoint

CO2St Analog

Input

When the CO

2

level rises above

the CO

2

Protection

Limit Max Level,

the Economizer’s

Minimum Position

will begin to reset

open proportion-

ally between the

CO

2

Protection

Limit Max Level

Setpoint and the

Reset Range

Setpoint.

0 3000

Minimum

Outside Air

Setpoint

MinEcoSt Analog

Input

This is the

minimum position

of the economizer

in the occupied

modes.

1 100

Static

Pressure

Setpoint

DuctPrSt Analog

Input

This is the target

duct pressure to

be maintained by

the VFD blower

signal.

0.01 3

Preheater

Setpoint

PreHtSp Analog

Input

Low Outside Air

Ambient

Protection Set-

point

0 100

Outdoor

Air CFM

Setpoint

OACfmSt Analog

Input

Minimum desired

Outdoor Air CFM.

0.10 K 200 K

Outdoor Air

CFM Reset

Limit

OACfmRs Analog

Input

Maximum desired

Outdoor Air CFM

when CO

2

reaches

its reset limit.

0.10 K 200 K

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 39 40

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