Specifications

ManualsBrandsCarrier ManualsWater DispenserEVERGREEN 23XRV

2. ECL CONTROL OPTION is ENABLED AND ice

build is not active (ECL control):

The CONTROL POINT has not been increased by at

least 1° F in the last 5 min. AND ENTERING

CHILLED LIQUID temperature is less than the CON-

TROL POINT minus 5° F OR ENTERING CHILLED

LIQUID temperature is less than the CONTROL

POINT AND the difference between ENTERING

CHILLED LIQUID — LEAVING CHILLED LIQUID

is less than RECYCLE SHUTDOWN DELTA T.

3. The LEAVING CHILLED LIQUID temperature is less

than the EVAP REFRIG TRIPPOINT plus 3° F.

(NOTE: Refer to Refrigerant Low Temperature

Override)

Whenever recycle shutdown is active the RUN

STATUS shall be “Recycle”.

When the chiller is in RECYCLE mode, the chilled liquid

pump relay remains energized so the chilled liquid temperature

can be monitored for increasing load. The recycle control uses

RECYCLE CONTROL RESTART DELTA T to check when the

compressor should be restarted. This is an operator-configured

function which defaults to 5º F (3º C). This value can be

viewed or modified on the SETUP1 table. The compressor will

restart when the chiller is:

• in LCL CONTROL (ECL CONTROL OPTION

DISABLED) and the LEAVING CHILLED LIQUID

temperature is greater than the CONTROL POINT plus

the RECYCLE CONTROL RESTART DELTA T.

• in ECL CONTROL and the ENTERING CHILLED

LIQUID temperature is greater than the CONTROL

POINT plus the RECYCLE CONTROL RESTART

DELTA T.

Once these conditions are met, the compressor initiates a

start-up with a normal start-up sequence.

An alert condition may be generated if 5 or more recycle

start-ups occur in less than 4 hours. Excessive recycling can

reduce chiller life; therefore, compressor recycling due to

extremely low loads should be reduced.

To reduce compressor recycling, use the time schedule to

shut the chiller down during known low load operation periods,

or increase the chiller load by running the fan systems. If the

hot gas bypass is installed, adjust the values to ensure that hot

gas is energized during light load conditions. Increase the

RECYCLE CONTROL RESTART DELTA T on the SETUP1

table to lengthen the time between restarts.

The chiller should not be operated below design minimum

load without a hot gas bypass installed.

Safety Shutdown — A safety shutdown is identical to a

manual shutdown with the exception that, during a safety

shutdown, the ICVC displays the reason for the shutdown, the

alarm light blinks continuously, and the spare alarm contacts

are energized.

After a safety shutdown, the softkey must be

pressed to clear the alarm. If the alarm condition is still present,

the alarm light continues to blink. Once the alarm is cleared,

the operator must press the or softkeys to

restart the chiller.

BEFORE INITIAL START-UP

Job Data Required

• list of applicable design temperatures and pressures

(product data submittal)

• chiller certified prints

• starting equipment details and wiring diagrams

• diagrams and instructions for special controls or options

• 23XRV Installation Instructions

• pumpout unit instructions

Equipment Required

• T30 hexalobular socket screw driver to remove control

center door shipping brackets

• mechanic’s tools (refrigeration)

• digital volt-ohmmeter (DVM)

• clamp-on ammeter

• electronic leak detector

• absolute pressure manometer or wet-bulb vacuum indi-

cator (Fig. 28)

• 500-v insulation tester (megohmmeter) for compressor

motors with nameplate voltage of 600 v or less

• Reliance LCD OIM (operator interface module)

(optional)

Using the Optional Storage Tank and Pump-

out System —

Refer to Chillers with Storage Tanks sec-

tion, page 70 for pumpout system preparation, refrigerant

transfer, and chiller evacuation.

Remove Shipping Packaging — Remove any pack-

aging material from the control center, oil pump, VFD cooling

solenoid, HGBP solenoid, oil reclaim actuator, oil heater termi-

nal boxes, and relief valves.

Open Oil Circuit Valves — Check to ensure the oil fil-

ter isolation valves (Fig. 8) are open by removing the valve cap

and checking the valve stem.

Oil Charge — The oil charge for the 23XRV chiller is split

between the cooler and the oil vaporizer:

The chiller is shipped with its oil charge. The oil level in the

vaporizer will initially be in the center of the oil sump sight

glass. This level will vary depending on the amount of refriger-

ant that has been absorbed by the oil and the operating

conditions of the chiller. Normal oil levels will vary from the

top of the strainer housing sight glass to above the top of the oil

sump sight glass.

If oil is added, it must conform to Carrier’s specification for

screw compressor use as described in the Oil Specification

section. Charge the oil through the oil charging valve located

near the bottom of the oil strainer housing. The oil must be

pumped from the oil container through the charging valve due

to the higher refrigerant pressure. The pumping device must be

able to lift from 0 to 200 psig (1379 kPa) or above unit

pressure. Oil should only be charged or removed when the

chiller is shut down.

Tighten All Gasketed Joints — Gaskets normally

relax by the time the chiller arrives at the jobsite. Tighten all

gasketed joints to ensure a leak-tight chiller. See Table 8 for

waterbox torque specifications.

Table 8 — Waterbox Bolt Torque

RESET

CCN

LOCAL

Frame

Size

Cooler

Charge

Oil Sump

Charge

Total

1 gal.(3.8 L) 6.5 gal.(24.6 L)

7.5 gal.

(28.4 L)

COOLER or

CONDENSER

NOMINAL

BOLT SIZE

TORQUE

ft-lb N-m

FRAME 3

-11 105-150 142-203

-10 175-250 237-339

FRAME 4

-11 105-150 142-203

-10 175-250 237-339

- 9 265-380 359-515

FRAME 5

-11 105-150 142-203

-10 175-250 237-339

- 9 265-380 359-515