Carrier 33ZCVAVTRM Specifications download pdf (Page 164)

SAT CMP2 LOCKOUT TEMP — The SAT CMP2 Lockout

Temperature displays the low supply temperature set point for

compressor no. 2 supply air during cooling. If compressor no. 2

is on during Cooling mode, the economizer will assist the cool-

ing and work to maintain a discharge-air temperature slightly

above lockout temperature set point. If the economizer is at

minimum and the supply-air temperature goes below Lockout

Temperature set point, the compressor will cycle to maintain

the supply air set point. The minimum on and off times and

stage-up and down timers will still be in effect.

SAT CMP2

Lockout Temp: Units degrees F (degrees C)

Range 45.0 to 55.0

Default Value 50.0

STAGED COOLING — The staging function is used for DX

cooling (1 or 2 stages). The staging function uses the cooling

submaster reference from the PID and compares the value to

the supply-air temperature to calculate the required number of

output stages to energize.

Time Guard delays are provided to allow for up to 2 stages

of compression. Also, a DX Lockout will prevent operation

of the DX cooling if the outdoor air temperature is below this

value.

The cooling algorithm controls the valve or stages of DX

cooling to prevent the space temperature from exceeding the

current cooling set point (which includes any calculated offset

value from a T56 sensor slide bar or T59 sensor during occu-

pied periods). Also, the cooling is controlled so that the supply

air temperature does not fall below 50 F when cooling is active.

Number of Stages: Range 1 to 3

Default Value 2

The Time Guards must be set to Enable for output to a

compressor, and set to Disable for output to a valve or

compressor unloader.

When enabled, the staging PID loop will have a minimum

delay of 3 minutes before adding the stage and dropping the

stage after it is started. This delay will run concurrently with

the Compressor Minimum On (C_MIN_ON) and Off

(C_MIN_OF) delays found in this table. The actual compres-

sor on/off delays will be the greater of the two functions.

When disabled, there will be no delay in adding or droping the

stage other then the Compressor Minimum On and Off Delays.

NOTE: Stage 1 Time Guard cannot be disabled.

Stage 1

Time Guard: Range Disable/Enable

Default Value Enable

Stage 2

Time Guard: Range Disable/Enable

Default Value Enable

Stage 3 (not used)

Time Guard: Range Disable/Enable

Default Value Disable

HEATING PID — The PremierLink™ controller determines

if a heating demand exists in the space. The controller reads the

space temperature sensor and compares the temperature to the

current low set point (including any calculated offset value

from a T56 or T59 sensor) during occupied periods. If it is

below the set point, and heating is configured and available, it

then calculates the required supply-air temperature to satisfy

the given conditions. The calculated value (heating submaster

reference) is compared to the actual supply-air temperature and

the output is then adjusted to satisfy conditions by using a

Proportional/Integral/Derivative (PID) loop.

The Heating PID includes the following set points: Propor-

tional Gain, Integral Gain, Derivative Gain, and Starting Value.

Proportional Gain: Range –100.0 to 100.0

Default Value 6.0

Integral Gain: Range –5.0 to 5.0

Default Value 3.0

Derivative Gain: Range –20.0 to 20.0

Default Value 5.0

Starting Value: Units degrees F (degrees C)

Range 40.0 to 120.0

Default Value 75.0

NOTE: If configured for heat pump operation, the propor-

tional, integral, and derivative gains need to be changed to the

following values: proportional gain - 10.0, integral gain - 1.0 to

2.0, derivative gain - 3.0.

SAT HIGH SET POINT — This is the maximum duct tem-

perature value that will be calculated by heating algorithm dur-

ing the heat mode.

SAT High

Setpoint: Display Unit degrees F (degrees C)

Range 100.0 to 140.0 F

Default Value 140.0 F

STAGED HEATING — The Staged Heating function is used

for two-position valves or for electric heat (1 or 2 stages). The

staging function uses the heating submaster reference value

from the PID and compares it to the supply-air temperature to

calculate the required number of output stages to energize. The

time guard, when enabled, will increase the heat output mini-

mum off time from 3 minutes to 5 minutes.

Number of Stages: Range 1 to 3

Default Value 2

Stage 1

Time Guard: Range Disable/Enable

Default Value Enable

Stage 2

Time Guard: Range Disable/Enable

Default Value Enable

Stage 3

Time Guard: Range Disable/Enable

Default Value Enable

IAQ PID — The proportional gain affects the response of PID

calculations for staged control. The gain is also used for two

position control to establish the hysteresis between on and off.

A larger gain speeds response time or reduces the hysteresis,

while a smaller gain requires a larger error to generate the same

response to changes in Indoor Air Quality. Enter the desired

proportional gain for the Indoor Air Quality control algorithm.

The integral gain affects the PID calculation; an increase

will make the IAQ submaster reference change greater as the

error in indoor air quality increases. The integral gain should be

selected to eliminate proportional droop without overshoot.

Enter the desired integral gain for the Indoor Air Quality con-

trol algorithm.

The Derivative Gain is typically not required for Indoor Air

Quality operation and should be left at the default value.

The Starting Value is used to establish the starting value for

the IAQ PID calculation.

1 2 ... 159 160 161 162 163 164 165 166 167 168 169 ... 315 316

Comments to this Manuals

No comments

Carrier 33ZCVAVTRM Specifications Page 164

Comments to this Manuals

Related products and manuals for Split-system air conditioners Carrier 33ZCVAVTRM