Carrier 19XRV Specifications download pdf (Page 50)

50

Table 7 — Capacity Overrides

OVERRIDE

CONDITION

(Configurable

Override

Paramter)

FIRST STAGE SET POINT

(Capacity Inhibit)

SECOND STAGE SET POINT

(Forced Capacity Decrease)

OVERRIDE

TERMINATION

View/Modify on

ICVC Screen

Override Default

Value

Configurable Range Value Value

High Condenser

Pressure (COND

PRESS

OVERRIDE)

SETUP1

CONDENSER

PRESSURE > 125

PSIG (862 kPa)

90 to 165 PSIG

(621 to 1138 kPa)

CONDENSER PRESSURE >

COND PRESS OVERRIDE + 2.4

PSIG (16.5 kPA)

CONDENSER PRES-

SURE < CON-

DENSER PRESS

OVERRIDE - 1 PSI

(6.9 kPa)

High Motor

Temperature

(COMP MOTOR

TEMP

OVERRIDE)

SETUP1

COMP MOTOR

WINDING TEMP >

COMP MOTOR

TEMP OVERRIDE

threshold but <=

COMP MOTOR

TEMP OVERRIDE

threshold +10° F

150 to 200 F

(66 to 93 C)

COMP MOTOR WINDING TEMP

> COMP MOTOR TEMP OVER-

RIDE + 10 F (5.6 C)

COMPR MOTOR

WINDING TEMP <

COMP MOTOR TEMP

OVERRIDE - 2 F

(1.1 C)

Low Evaporator

Temperature

(REFRIG

OVERRIDE

DELTA T)

SETUP1

CALC EVAP SAT

TEMP < EVAP

REFRIG TRIP-

POINT + 3 F(1.7 C)

2 to 5 F

(1.1 to 2.8 C)

CALC EVAP SAT TEMP < EVAP

SAT OVERRIDE TEMP - 1 F (0.6

C) NOTE: EVAP SAT OVERRIDE

TEMP = EVAP REFRIG TRIP-

POINT + REFRIG OVERRIDE

DELTA T

CALC EVAP SAT

TEMP > EVAP SAT

OVERRIDE TEMP +

2 F (1.1 C)

High

Compressor Lift

(Surge

Prevention)

(SURGE/HGBP

DELTA T,P)

OPTIONS

Min T1: 1.5 F (0.8 C)

Min P1: 50 PSID

(345 kPa) Max T4:

10 F (5.6 C) Max P4:

85 PSID (586 kPad)

With VFD enabled,

VFD SPEED must

be at maximum

0.5 - 2.0 F (0.3 - 1.1 C)

30 - 170PSID (207 -

1172 kPad) 0.5 - 20 F

(0.3 - 11.1 C) 50 - 170

PSId (345 - 1172 kPad)

None

ACTIVE DELTA T >

SURGE/HGBP DELTA

T + SURGE/HGBP

DEADBAND

High

Compressor Lift

(Surge

Prevention)

(Tsmin, IGVmin,

Tsmax, IGVmax,

Shapefac)

OPTIONS

Tsmain: 45 ^F

IGVmin: 5%

Tsmax: 70 ^F

IGVmax: 100%

shapefac: -0.04

0 to 150 ^F

0 to 110%

0 to 150 ^F

0 to 110%

-1 to 0

None

ActiveTsat < Surge-

Line Tsat + Dead-

band Setting

Manual Guide

Vane Target

(TARGET GUIDE

VANE POS)

COMPRESS Automatic 0 to 100% None

Press RELEASE soft-

key after selecting

TARGET GUIDE

VANE POS

Manual Speed

Control

(TARGET VFD

SPEED)

COMPRESS Automatic

VFD MINIMUM SPEED

to 100%

Forced TARGET VFD SPEED

cannot override either a capacity

inhibit or a capacity decrease

command generated by the PIC II

Press RELEASE soft-

key after selecting

TARGET VFD SPEED

Motor Load

(ACTIVE

DEMAND LIMIT)

MAINSTAT

AVERAGE LINE

CURRENT or

MOTOR PERCENT

KILOWATTS > 100%

40 to 100%

AVERAGE LINE CURRENT or

MOTOR PERCENT KILOWATTS

> ACTIVE DEMAND LIMIT + 5%

AVERAGE LINE CUR-

RENT or MOTOR

PERCENT KILO-

WATTS < ACTIVE

DEMAND LIMIT

Low Discharge

Superheat

OVERRIDE

ACTUAL SUPER-

HEAT < SUPER-

HEAT REQUIRED

for conditions

None

ACTUAL SUPERHEAT <

SUPERHEAT REQUIRED - 0.5 F

(0.3 C)

ACTUAL SUPER-

HEAT > SUPERHEAT

REQUIRED + 1 F

(0.56 C)

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