Orion-system SA Controller Manual de usuario descargar pdf (Pagina 31)

SA Controller Operator Interface

Programming

Setpoint Screen #20 - Supply Fan Starting

Delay Timer

SA Unit Spts ID 102

Fan Starting Delay

Timer...: 255 s

This is the Supply Fan Starting Delay Timer initiated whenever the SA

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

using multiple SA-controlled 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 SA Controller should be set with staggered Fan Starting

Delay Timer Setpoint values. When the 255 Second default setpoint is

used, it multiplies each SA Controller’s address by 5 and uses this value

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

start for each SA Controller on the system without having to individually

set each SA Controller for its own time delay.

Description Minimum Default Maximum

Fan Start Delay Timer 0 Sec 255 Sec 255 Sec

Setpoint Screen #21 - Mechanical Heat/Cool

Failure Time Period

SA Unit Spts ID 102

Mechanical Heat/Cool

Failures Occur After

No Change For 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

SA Controller Setpoint Screens

Setpoint Screen #22 - Preheat/ Low Ambient

Temperature

SA Unit Spts ID 102

Preheat/Low

Ambient Temperature

Setpoint: 0ºF

For cold climates where freezing temperatures may be experienced,

a Pre-Heater relay output can be activated based on the Outdoor Air

Temperature to prevent freezing of Water Coils. One of the SA Relay

Outputs must be conﬁ gured for the Pre-Heater control. When conﬁ gured,

if the Entering Air Temperature falls below the Low EAT Ambient Pro-

tection Temperature Setpoint and the HVAC unit is in Occupied Mode,

the Pre-Heater relay will activate.

Description Minimum Default Maximum

Preheat/Low Ambient

Temperature

0ºF 0ºF 100ºF

Setpoint Screen #23 - HVAC Schedule

SA Unit Spts ID 102

HVAC Schedule...: 0

[ 0 = Internal ]

[1-5 = External ]

The SA Controller has an Internal Scheduler. If you want the SA Control-

ler to use its own Internal Schedule to schedule the HVAC unit, enter

<0> for Internal. To use the External Schedule option, you must have a

GPC Plus controller installed and operating on your system. To use one

of the (5) External Schedules available on the GPC Plus controller, enter

the number of the GPC Plus Schedule (1 through 5) you wish to use.

Description Minimum Default Maximum

HVAC Schedule 0 0 5

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 67 68

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Orion-system SA Controller Manual de usuario Pagina 31

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