Orion-system VAV II Controller v.1 Bedienungsanleitung PDF herunterladen (Seite 35)

VAV/CAV/MUA Operator Interface SD

VAV/CAV CONTROLLER SETPOINTS

Setpoint Screen #21 - HVAC Schedule

VAV/CAV Spts ID 0001

AHU Schedule By

Schedule Number: 0

0=AHU 1-7=Scheduler

Normally, the AHU will use its own internal time clock and week

schedules to set the Occupied Mode of operation. If you have several

air handlers, you can connect an external scheduling device to the com-

munications loop and program the air handler for the desired schedule to

follow. If the AHU is using its internal schedule, enter

<0> for Internal.

Description Minimum Default Maximum

Schedule Number 0 0 1 to 7

Setpoint Screen #22 - Economizer Maximum

Position if High CO

Level

VAV/CAV Spts ID 0001

Maximum Economizer

Position if High CO2

Level Occurs.: 100%

If you have conﬁ gured the air handler to read a CO

Sensor, it will over-

ride the Minimum Economizer Position up to this position if the CO

level rises above its setpoint by the adjustable Reset Range amount. See

Setpoint Screen #23.

NOTE: The Minimum Position is determined by the user-

adjustable Min Position Setpoint on Setpoint Screen #14

on page 34.

Description Minimum Default Maximum

Maximum Economizer

Position If High CO

Level Occurs

Economizer

Minimum

Position

100% 100%

Setpoint Screen #23 - CO

Protection Limit

VAV/CAV Spts ID 0001

CO2 Protection Limit

Max Level: 900 PPM

Reset Range: 100 PPM

If you conﬁ gure the air handler to read a CO

Sensor, the Max Level is the

point at which the Economizer Minimum Position starts to reset upward.

As the CO

level rises above the Max Level by the Reset Range amount,

the Economizer will have reset its Minimum Position proportionally up

to the previously deﬁ ned Economizer Maximum Position in High CO

Description Minimum Default Maximum

Protection Limit

Max Level

0 PPM 900 PPM 5000 PPM

Protection Limit

Reset Range

0 PPM 100 PPM 1000 PPM

VAV/CAV Setpoint Screens

VFD Percentage Cool Reset Example:

Hi Reset = 70% SAT Setpoint (Spt) = 55°F

Lo Reset = 30% SAT Setpoint (Rst) = 65°F

VFD Percentage Heat Reset Example:

Hi Reset = 30% SAT Setpoint (Spt) = 90°F

Lo Reset = 70% SAT Setpoint (Rst) = 120°F

Input Voltage Cool Reset Example:

Hi Reset = 0 Volts SAT Setpoint (Spt) = 55°F

Lo Reset = 10 Volts SAT Setpoint (Rst) = 65°F

Input Voltage Heat Reset Example:

Hi Reset = 0 Volts SAT Setpoint (Spt) = 90°F

Lo Reset = 10 Volts SAT Setpoint (Rst) = 120°F

Setpoint Screen #19 - Supply Fan Starting

Delay Timer

VAV/CAV Spts ID 0001

Start Fan Delay

Timer...: 999s

[999= Unit Addr x 5]

This is the amount of time that the main HVAC unit fan will delay before

starting after an occupied signal is initiated or after a power failure. The

default value is 999. With the default value, the delay will be equal to

the unit address multiplied by 5.

Example: Controller ID (address) 18 would cause a 90 second delay

when the default value of 999 is used. Controller ID (address) 30 would

cause a 150 second delay when the default value of 999 is used.

Description Minimum Default Maximum

Fan Start Delay Timer 0 Sec 999 Sec 999 Sec

Setpoint Screen #20 - Mechanical Heat/Cool

Failure Time Period

VAV/CAV Spts ID 0001

Mechanical Heat/Cool

Failures Occur After

No Change In 15Min

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 In 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 In

0 Min 15 Min 300 Min

1 2 ... 30 31 32 33 34 35 36 37 38 39 40 ... 79 80

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