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125

VCCX2 Controller Technical Guide

BACnet

Properties for the VCCX2 Controller

Parameter Object Description

Limits

Min Coil

Setpoint

Reset Limit

AV: 9 This is the lowest that the

Coil Temperature will be

reset to during Space

Humidity Reset of the

Coil Suction Temperature

Setpoint. If no coil

temperature reset is

required, this value should

be set the same as the

Max Coil Reset Limit.

35°F

1.7°C

70°F

21.1°C

Supply Air

Cooling

Setpoint

AV: 10 Supply Air Cooling

Setpoint. If Supply Air

Reset is congured this

is the Low SAT Cooling

Reset Value.

30°F

-1.1°C

80°F

26.6°C

Supply Air

Heating

Setpoint

AV: 11 Supply Air Heating

Setpoint. If Supply Air

Reset is congured this

is the Low SAT Heating

Reset Value.

40°F

4.5°C

240°F

115.5°C

Max SAT

Cooling

Setpoint

Reset Limit

AV: 12 If Supply Air Reset is

congured this is the High

SAT Cooling Reset Value.

0°F

-17.7°C

100°F

37.7°C

Max SAT

Heating

Setpoint

Reset Limit

AV: 13 If Supply Air Reset is

congured this is the High

SAT Heating Reset Value.

0°F

-17.7°C

250°F

121.1°C

Supply Air

Cooling

Staging

Window

AV: 14 In Cooling Mode, if the

Supply Air Temperature

drops below the Active

Supply Air Cooling Set-

point minus this Staging

Window, a Cooling Stage

will be deactivated after

its Minimum Run Time.

1°F

0.6°C

30°F

16.6°C

Supply Air

Heating

Staging

Window

AV: 15 In Heating Mode, if the

Supply Air Temperature

rises above the Active

Supply Air Heating

Setpoint plus this Staging

Window, a Heating Stage

will be deactivated after

its Minimum Run Time.

1°F

0.6°C

50°F

27.7°C

Warm-Up

Target

Temperature

(See AV: 89

for Cool-

Down Target

Temperature)

AV: 16 If Morning Warm-Up is

congured, then upon en-

tering occupied mode, the

Warm-Up Mode will be

activated if the Return Air

is below this temperature

by one degree.

50°F

10°C

90°F

32.2°C

Warm-Up

Mode Supply

Air Setpoint

AV: 17 During Morning Warm-

Up, the Supply Air

Temperature will be

controlled to this Setpoint.

40°F

4.5°C

240°F

115.5°C

Cool-Down

Mode Supply

Air Setpoint

AV: 18 During Morning Cool-

Down, the Supply Air

Temperature will be

controlled to this Setpoint.

30°F

-1.1°C

80°F

26.6°C

BACnet

Properties for the VCCX2 Controller

Parameter Object Description

Limits

Mechanical

Cooling

Outdoor Air

Lockout

AV: 19 Mechanical Cooling will

be locked out when the

Outdoor Air Temperature

is below this Setpoint.

-30°F

-34.4°C

100°F

37.7°C

Mechanical

Heating

Outdoor Air

Lockout

AV: 20 Mechanical Heating will

be locked out when the

Outdoor Air Temperature

is above this Setpoint.

-30°F

-34.4°C

150°F

65.5°C

Low Supply

Temp Cuto

Alarm

AV: 21 Cooling will be disabled

if the Supply Air

Temperature falls below

this value. See sequence

for more details.

0°F

-17.7°C

100°F

37.7°C

High Supply

Temp Cuto

Alarm

AV: 22 Heating will be disabled if

the Supply Air

Temperature rises above

this value. See sequence

for more details.

0°F

-17.7°C

250°F

121.1°C

Preheater

Cooling

Mode Set-

point

AV: 23 If the Preheater is en-

abled, and the unit is in

the Cooling Mode, this

setpoint will be sent to the

Preheat-X Controller to

control Leaving Air

Temperature.

35°F

-17.7°C

90°F

32.2°C

Preheater

Venting

Mode Set-

point

AV: 24 If the Preheater is

enabled, and the unit is

in the Vent Mode, this

setpoint will be sent to the

Preheat-X Controller to

control Leaving Air

Temperature.

35°F

-17.7°C

90°F

32.2°C

Preheater

Heating

Mode Set-

point

AV: 25 If the Preheater is en-

abled, and the unit is in

the Heating Mode, this

setpoint will be sent to the

Preheat-X Controller to

control Leaving Air

Temperature.

35°F

-17.7°C

90°F

32.2°C

Outdoor Air

Dewpoint

Setpoint

AV: 26 On an MUA unit, if the

OA dewpoint rises above

this setpoint,

Dehumidication is

initiated.

35°F

1.7°C

80°F

26.6°C

Economizer

Enable

Setpoint

AV: 27 The economizer is

enabled if the outdoor

drybulb, dewpoint, or

wetbulb temperature falls

below this setpoint.

-30°F

-34.4°C

80°F

26.6°C

Heat Wheel

Defrost

Enable

Setpoint

AV: 28 The unit will go into

Heat Wheel Defrost if the

Outdoor Air is below this

setpoint.

0°F

-17.7°C

50°F

10°C

APPENDIX C

VCCX2 BACnet

Parameters

Brand	AAON
Model	Orion VCCX2
Category	Controller
Language	English

AAON Orion VCCX2 User Manual

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AAON Orion VCCX2 Specifications

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