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LOCAL INTERFACE DEVICE (LID) — The LID is mounted

in the control center and allows the operator to interface with

the PSIO or other CCN devices. It is the input center for all

local machine set points, schedules, set up functions, and op-

tions. The LID has a stop button, an alarm light, 4 buttons

for logic inputs, and a display. The function of the 4 buttons

or ‘‘softkeys’’ are menu driven and are shown on the display

directly above the keys.

6-PACK RELAY BOARD — This device is located in the

control center and a cluster of 6 pilot relays, energized by

the PSIO, for the oil heater (Frame 1 and 2 machines), spare

alarm, optional hot gas bypass relay, and motor cooling

solenoids.

8-INPUT MODULES (Optional) — One optional module is

factory installed in the control center when ordered. There

can be up to 2 of these modules per chiller with 8 spare in-

puts each. They are used whenever chilled water reset, de-

mand reset, common supply/return sensors, or reading a spare

sensor is required. The sensors or 4 to 20 mA signals are

ﬁeld installed.

The spare temperature sensors must have the same

temperature/resistance curve as the other temperature sen-

sors on this unit. These sensors are 5,000 ohm at 75 F

(25 C).

OIL HEATER CONTACTOR RELAY (1C) (Frame 1 and 2

Only) — This contactor relay is located in the power panel

and operates the heater at either 115 or 230 v. It is controlled

by the PIC to maintain oil temperature during machine

shutdown.

HOT GAS BYPASS RELAY (3C) (Optional) — This relay

contactor located in the power panel, controls the opening of

the hot gas bypass solenoid valve. The PIC energizes the

relay during low load, low compression ratio conditions.

CONTROL TRANSFORMERS (T1-T4) — These trans-

formers convert incoming control voltage to either 21-vac

supply power for the PSIO module, LID, and options mod-

ule, or 24-vac power supply for the power panel, control re-

lays, 6-pack relay board, oil solenoid valve, oil level switch,

slide valve solenoids, and VI (optional) actuator solenoids.

CONTROLAND OIL HEATER VOLTAGE SELECTOR (S1)

— It is possible to utilize either 115 v or 230 v

incoming control power in the power panel. The switch is

set to the voltage used at the jobsite.

VARIABLE CONTACTOR RELAY (2C) (Optional) — This

contactor relay is located in the power panel. The PIC en-

ergizes the relay to move the slide valve stop to the high VI

position based on system compression ratio.

TEMPERATURE SENSORS — The temperature sensors sense

the temperature of oil, refrigerant, water, and the motor through-

out the machine.

PRESSURE TRANSDUCERS — The pressure transducers

sense the pressure of oil and refrigerant throughout the

machine.

LID Operation and Menus (Fig. 17 - 23)

GENERAL

• The LID display will automatically revert to the default

screen after 15 minutes if no softkey activity takes place

and if the machine is not in the PUMPDOWN mode

(Fig. 17).

• When not showing the default screen, the upper right-

hand corner of the LID always displays the name of the

screen that you have entered (Fig. 18).

• The LID may be conﬁgured in English or SI units through

the LID conﬁguration screen.

• Local Operation — By pressing the LOCAL

softkey, the

PIC is now in the LOCAL operation mode, and the control

will accept modiﬁcation to programming from the LID only.

The PIC will use the Local time schedule to determine ma-

chine start and stop times.

• CCN Operation — By pressing the CCN

softkey, the

PIC is now in the CCN operation mode. The control will

accept modiﬁcations from any CCN interface or module

with the proper authority, as well as the LID. The PIC will

use the CCN time schedule to determine start and stop times.

ALARMS AND ALERTS — Alarm (*) and alert (!) status

are indicated on the Status tables. An alarm (*) will shut down

the compressor. An alert (!) notiﬁes the operator that an un-

usual condition has occurred. The machine will continue to

operate when an alert is shown.

Alarms are indicated when the control center alarm light

(!) ﬂashes on the LID panel. The alarm message is viewed

on the default screen and an additional message and trouble-

shooting information are sent to the alarm history screen.

When an alarm is detected, the LID default screen will

freeze (stop updating) at the time of alarm. The freeze en-

ables the operator to view the machine conditions at the time

of alarm. The Status tables will show the updated informa-

tion. Once all alarms have been cleared (by pressing the

RESET

softkey), the default LID screen will return to nor-

mal operation.

Fig. 17 — LID Default Screen

Fig. 18 — LID Service Screen

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 103 104

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