Carrier 33ZCVAVTRM Specifications download pdf (Page 157)

capacity equal to the stage of capacity that the unit is operating

at when the redline alert was initiated.

When load shed command is received the control will re-

duce capacity as shown in Tables 9 and 10.

Table 9 — Load Shed Command — Gas and

Electric Heat Units

Table 10 — Load Shed Command — Heat Pump

Units

The controller will have a maximum demand limit timer of

1 hour that prevents the unit from staying in load shed or red-

line alert longer than 1 hour in the event the controller loses

communication with the network load shed module. Should the

maximum demand limit timer expire prior to receiving the un-

shed device command from CCN, the control will stop demand

limit mode and return to normal operation.

CONFIGURATION

The following sections describe the computer configuration

screens which are used to configure the PremierLink™ con-

troller. The screens shown may be displayed differently when

using different Carrier software.

Points Display Screen — The Points Display screen is

used to monitor and change the PremierLink controller set

points. See Table 11.

SPACE TEMPERATURE — This point displays the space

temperature from the 10K thermistor (Type II) located in the

space.

Space

Temperature: Display Units degrees F (degrees C)

Default Value –40.0

Display Range –40.0 to 245.0

Network Access Read/Write

SUPPLY AIR TEMPERATURE — The Supply Air Temper-

ature point displays the temperature of the air leaving the unit,

downstream of any cool or heat sources. Temperature is mea-

sured by a 10K thermistor (Type II). This sensor is required for

proper function of the heating, cooling, and the economizer.

Supply Air

Temperature: Display Units degrees F (degrees C)

Default Value 0.0

Display Range –40.0 to 245.0

Network Access Read/Write

OUTDOOR AIR TEMPERATURE — Temperature of the

air entering the rooftop is measured by a 10K thermistor (Type

II). This sensor is required for proper function of the cooling

mode and the economizer.

Outdoor Air

Temperature: Display Units degrees F (degrees C)

Default Value 0.0

Display Range –40.0 to 245.0

Network Access Read/Write

CONTROL SET POINT — This point displays the current

controlling set point when a heat or cool mode is active. If there

is not an active heat or cool set point, the set point of the last

mode is displayed. Upon reset or start-up, the proper cooling

set point is displayed, depending on occupancy. In the thermo-

stat mode, this point is not used for equipment control.

Control Set Point: Display Units degrees F (degrees C)

Default Value Unoccupied Cool

Setpoint

Display Range 35 to 110

Network Access Read Only

ROOFTOP MODE — This point displays the current mode

of the PremierLink controller based on active space tempera-

ture, set points, and occupancy.

Rooftop Mode: Display Units ASCII

Default Value Off

Display Range OFF, COOL, HEAT,

FAN ONLY,

UNOCCOOL,

UNOCHEAT,

WA RM UP,

FREECOOL, PRESS

EVAC

Network Access Read Only

COOLING PERCENT TOTAL CAPACITY — The Cooling

Percent Total Capacity point is used to display the current

Cooling Capacity. When cooling is enabled, the percent of

cooling being delivered is determined by the following formula

for the number of compressor stages confirmed:

% Output Capacity = (no. of active stages/Total stages) * 100.

Cooling Percent

Total Capacity: Display Units % output capacity

Default Value 0

Display Range 0 to 100

Network Access Read Only

HEATING PERCENT TOTAL CAPACITY — The Heat-

ing Percent Total Capacity point is used to display the current

Heating Capacity.

When heat is enabled, the percent of heat being delivered is

determined by the following formula for gas or electric heat:

% Output Capacity = (no. of active stages/Total stages) * 100

Heating Percent

Total Capacity: Display Units % output capacity

Default Value 0

Display Range 0 to 100

Network Access Read Only

ECONOMIZER ACTIVE — The Economizer Active point

displays the status of the economizer for free cooling. When

the outdoor conditions match the desired indoor conditions, the

economizer will be enabled for outdoor air assisted cooling.

Economizer

Active: Display Units Discrete ASCII

Default Value No

Display Range No/Yes

Network Access Read Only

CURRENT CAPACITY NEW CAPACITY

CMP1 DX Cooling OFF

CMP1+CMP2 CMP1

HS1 Heat OFF

HS1+HS2 (+HS3) HS1

CURRENT CAPACITY NEW CAPACITY

Cooling:

CMP1 DX Cooling OFF

CMP1+CMP2 CMP1

Heating:

CMP1+CMP2+RV Heat OFF

CMP1+CMP2+RV+HS1+HS2 CMP1+CMP2+RV

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Carrier 33ZCVAVTRM Specifications Page 157

Comments to this Manuals

Carrier 33ZCVAVTRM Specifications Page 157

Comments to this Manuals

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