York MILLENNIUM User manual

INSTALL., OPERATION, MAINT.
MILLENNIUM REMOTE CONTROL CENTER
FOR AIR-COOLED SCREW CHILLERS
Supersedes: Nothing Form 201.11-NM1 (398)
28376A

YORK INTERNATIONAL
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PARTS LIST FOR AIR-COOLED SCREW RCC OPTION
QTY. DESCRIPTION YORK PART NO. REMARKS
1 RCC Unit 371-02400-102 Included
1 RCC EPROM 031-01714-007 Included *
2 LTP Trans. Protect Mod. 031-01586-000 Included***
Ft Commun. Cable – Alpha 4562 or Beldon 9320 User Supplied
1 115V/24VAC Trans. 025-29917-001 York Option
1 220V/24VAC Trans. 025-29917-002 York Option
OPTIONAL PRINTER
1 Printer Model 1220 Weigh-Tronix**
* Version C.ACS.07.02 introduced 1/98;Year 2000 compliant.
** Weigh-Tronix, Inc., Santa Rosa, CA. Phone: [phone]
Fax: [phone]
*** Order one LTP for each additional chiller, i.e. chillers 2, 3, and 4
if multiple units are to be connected to one RCC.
SECTION 1  HARDWARE AND SETUP
GENERAL
The YORK Remote Control Center option (371-02400-
102) provides chiller operating data and control from a
remote location. This data includes system status, op-
erating information, fault information, and chiller oper-
ating history at the push of a key. Control functions in-
clude setpoint control, daily schedule programing, and
start/stop. Communications between the chiller and the
Remote Control Center and updating of information
occurs at 30 sec. intervals.
All data is displayed on a 40 character backlit LCD dis-
play (2 lines of 20 characters) and is accessed by a
soft touch keypad. The keypad and display are built
into an 8" x 10" x 2-1/2" (203 mm x 254 m x 64 mm)
NEMA-1 enclosure to be wall mounted indoors.
The Remote Control Center is also designed to enable
the user to obtain a remote print-out directly from the
remote panel, simplifying the data logging procedure.
One Remote Control Center can communicate with up
to four air-cooled screw chillers. NOTE: The Remote
Control Center can not be used with a Millennium ISN
System.
MOUNTING
Mount the Remote Control Center at a convenient lo-
cation and attach it securely. The panel may be mounted
away from the chiller as far as 4000 ft. (1219 m) of
wiring will allow.
INSTALLATION CHECKLIST
 24VAC Power Supply
 2 conductor shielded cable with shield connected
at RCC only; never at chiller.
 At RCC, red wire on 485+ and black wire on 485.
 At RCC, shield and grnd connected and jumpered.
 At chiller, red wire on BAS+ and black wire on BAS.
 180 ohm resistor installed at RCC or micro; never
at both.
 At RCC, Proper selection for NUMBER OF ACS
UNITS has been made (1 - 4).
AT EACH CHILLER
 For R-22, dip switch #8 CLOSED; use PROGRAM
7396 ENTER to input 022.
 For R-134a, Dip Switch #8 OPEN and PROGRAM
7396 ENTER to input 134.
 J-19 jumper in 485 position
 Rotary switch S-6 set to establish a specific unit
address. (See Address Designations)
 Use PROGRAM 7396 ENTER to access and se-
lect RCC (2) as type of communications mode.
 Dip Switch #3 in CLOSED position.
WIRING
Connection to the remote chiller is by twisted pair coax
cable. Operating voltage requirements for the panel is
24VAC.
If a user supplied 24VAC is utilized, the power source
must be capable of 1A capacity, maintain the voltage be-
tween 20 - 30VAC, and supply an earth ground to the
remote panel. Wire the 24VAC supply as shown in Fig. 2.
An optional 24VAC Wall Mounted Transformer is avail-
able. The transformer converts 115-1-50/60 or 220-1-
50 to 24VAC. The part number for the 115VAC option
is 025-29917-001; the part number for the 220VAC
option is 025-29917-002. The transformer is wired into
the remote panel as shown in Fig. 1.
A communications cable must connect the chiller(s) to
the remote panel. This cable should be a twisted pair
shielded cable type Alpha 4562, Beldon 9320, or
Quabbin 930421-2. The cable MUST NOT exceed 4000
ft. (1219 m) in length.
Wiring of the communications cable is shown in Fig. 1.
This cable is linked between TB7 of each chillers Mi-
croprocessor Board and TB2 of the Remote Control
panel. In the case of 3 or 4 compressor chillers, the com-
munications cable MUST ONLY be connected to the
Chillers MASTER Control Panel Microprocessor Board.
Assure that the 180 ohm resistor is connected between
terminals 1 and 2 of the TB2 connector in the Remote
Control Center. See Fig. 1.
Assure that a jumper connects terminals 3 and 4 of the
TB2 in the Remote Control Center. See Fig. 1.
Place the J19 jumper on the Microprocessor Board in
the RS-485 position.

FORM 201.11-NM1
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The increment value that occurs each time an arrow
key is touched is adjustable. To change the increment
values, enter the RCC programming setup described
below.
The increment value for temperature is adjustable from
0.1 to 5.0 (2.0° is typical). The increment value for pres-
sure is adjustable from 0.1 to 10.0 (5 PSI is typical).
During normal viewing of operating data, the arrow keys
may also be used to scroll up or down through the data
fields.
During programming, or when selecting a specific chiller
on multiple chiller applications, this key is used to store
the new values.
During normal viewing of system operating data or pro-
gram setpoints, this key will advance the display to the
next data field.
PROGRAMMING SETUP AT THE CHILLER
Press the PROGRAM key and scroll by repeatedly
touching the ENTER key. At the display titled COM-
MUNICATIONS MODE select RCC by pressing 2,
followed by ENTER.
PROGRAMMING SETUP AT THE RCC
The four character password sequence using arrow
keys UP UP DOWN DOWN followed by ENTER must
be entered to perform initial setup as well as system
programming.
Upon successful access into the program mode, the
initial display will appear as NUMBER OF AC SCREW
UNITS CONNECTED 1. Use of the arrow keys to en-
ter the correct number of units (1 - 4), followed by the
ENTER key.
Place each chiller in the REMOTE mode by placing
Dip Switch #3 of the Chillers Microprocessor Board in
the Closed Position. NOTE: Dip Switch settings can be
displayed by touching the Options key.
CAUTION:The shield of the communications cable
MUST only be connected at the Remote
Control Center panel and never at the chiller.
Never run the communication cable in
close proximity to any power wiring. For
best results, it should be run in dedicated
grounded conduit.
ADDRESS DESIGNATIONS
Earlier model remote control units could only commu-
nicate with one chiller. The YORK Millennium RCC can
communicate with up to four screw chillers. The rotary
switch S6 found on each chillers Microprocessor Board
must be properly set to designate a particular address
of each chiller. To do so, use a small flat screwdriver to
rotate the dial on the rotary switch S6, and position the
arrow pointer to the proper setting as described below.
Chiller #1 Position the arrow on S6 at 0
Chiller #2 Set S6 at 1
Chiller #3 Set S6 at 2
Chiller #4 Set S6 at 3
KEYPAD OPERATION
GENERAL
Communications between the chiller and the remote
chiller will not occur faster than 30 sec. intervals. This
results in a time lag in displays as well as time lags in
commands to the chiller from the Remote Control Cen-
ter. Keep this in mind when using the remote panel. In
addition, when power is first applied to the remote panel,
a time lag of 30 sec. to 2 min. may be required before
initial communications is established.
During programming, these keys will increase or de-
crease the value appearing on the display.
↑ ↓ ARROW KEYS
ENTER/
ADV

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FIG. 1  RCC WIRING CONNECTIONS
MULTIPLE CHILLER WIRING
For multiple YCAS chillers (up to 4), communication wiring can be in series from chiller
microboard to the next chiller microboard, or each chiller can be linked in parallel to the
RCC. Connections at each microboard should be as shown and include an LTP module.
(Additional LTP modules must be ordered separately)
LD02734

FORM 201.11-NM1
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YORK INTERNATIONAL
FIG. 2  REMOTE CONTROL CENTER INSTALLATION DETAILS
LD02733

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NOTE: This message will appear for 30 seconds when
power is first applied to the chiller or the Re-
mote Control Center and should not be cause
for alarm.
If communications are lost and not re-established, lo-
cal chiller setpoints will command chiller control after 5
minutes.
The PLEASE WAIT * * * * * * * * * INITIALIZING RE-
MOTE message will appear shortly after power to the
Remote Control Panel or the chiller is first turned on.
The message will follow the LOSS OF COMM LINK
TO AC SCREW PANEL message which will disappear
when communications are established. During the time
the initalizing message appears, the remote panel will
be communicating with the chiller and filling its memory
with current chiller information as well as information
from the chillers three HISTORY buffers. This typically
takes 30 seconds or more. As soon as the process is
complete, chiller status messages will be displayed.
CHILLER SWITCHED TO THE OFF CONDITION in-
forms the operator that the OFF key at the Remote
Control Center has been pressed, commanding the
chiller to shut down. This message will appear for a
few seconds, after which the display will show a RE-
MOTE CONTROLLED SHUTDOWN.
A REMOTE CONTROLLED SHUTDOWN message
indicates that the Remote Control Center has com-
manded the chiller to shut down.
CHILLER SWITCHED TO THE RUN CONDITION will
appear for a few seconds after the ON key is pressed
at the Remote Control Center, which commands the
chiller to turn ON. NOTE: The REMOTE CONTROLLED
SHUTDOWN message will then appear for a few sec-
onds until communication of the restart is transmitted
to the chiller. Once the transmission of the Run signal
is made, the display will automatically display current
STATUS of the chiller.
REMOTE SYSTEM PROGRAMMING
The four character password sequence must be en-
tered to allow adjusting of setpoint values.
OPERATING SETPOINTS
Current ACS software incorporates twenty-one (21)
adjustable setpoints. Other versions may vary slightly.
These 21 parameters are accessed by entering the nu-
merical password 7396 at the chiller, or at the RCC by
entering the arrow sequence UP UP DOWN DOWN
followed by ENTER. (Four asterisks should appear as
the arrow keys are touched).
The operating values and safety parameters can then
be reprogrammed from the RCC unit. Refer to the chiller
IOM under PROGRAM KEYS for complete details on
programmable variables.
When the STATUS KEY is pressed, information relat-
ing to the general operating condition of each system
is displayed. These displays will be very similar to those
displayed in the chiller control panel. In the case of 3 or
4 compressor chillers, the STATUS key must be
pressed twice to view status on all systems.
As mentioned, status displays will be much like those
displayed at the panel. Explanation of these displays
will be outlined in the Installation Manual for each spe-
cific chiller. Subtle differences may be noted in the ex-
act wording displayed versus the display which is shown
on the chiller control panel. An example of this is ap-
parent in the anti-recycle and anti-coincidence timers.
In the case of these two messages, the chiller control
panel indicates actual time left on the timers. The Re-
mote Control Center will only indicate that the timers
are ACTIVE. A few new STATUS displays have been
added. The new displays and corresponding explana-
tion of their meaning will follow.
A LOSS OF COMM LINK TO AC SCREW PANEL mes-
sage indicates that the communications link between
the chiller MicroComputer Control Center and the Re-
mote Control Center has been lost. This loss of com-
munications is normally a result of disconnecting the
RS-485 communications cable between the two pan-
els or the loss of power to the chiller control panel.
U1 LOSS OF COMM L INK
TO AC SCREW PANEL
PLEASE WAI T********
INITIALIZING REMOTE
CH I LLER SWI TCHED
TO THE OFF COND I T I ON
REMOTE CONTROL LED
SHUTDOWN
CH I LLER SWI TCHED
TO THE RUN COND I T I ON
STATUS
SECTION 2  OPERATION

FORM 201.11-NM1
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YORK INTERNATIONAL
When this key is pressed, the display will prompt you
to select either the oper data or the history to print.
When this key is pressed the following display will appear.
The display will prompt the operator to choose the his-
tory buffer the operator wishes to access. The History
Buffer stores data that was recorded by the chiller at
the instant a fault shutdown occurred. The History Buffer
at the RCC contains data on the last 3 shutdowns re-
gardless of whether the fault caused a system lockout.
Keep in mind when accessing these buffers that the
most recent fault will be stored in Buffer #1. The Re-
mote Control Center will automatically update the His-
tory Buffer each time a fault shutdown occurs. (The
chiller micropanel can record up to 9 faults).
To choose the buffer to be accessed, press the ↑or ↓
key until the desired buffer number appears. The EN-
TER/ADV key may then be pressed and the first item
in the History Buffer will appear. The entire contents of
the History Buffer can be scrolled through by repeti-
tively pressing the ENTER/ADV key.
The contents of the History Buffer will be displayed in a
format very similar to the History Buffer which is ac-
cessible directly at the Chiller Control Panel.
This key allows the operator to remotely change the
chiller target temperature.
When the CHILLED LIQUID key at the RCC is pressed, a
display will appear for one second which informs the op-
erator as to which control device is commanding the chiller
operation. One of the following two displays will appear:
Pressing this key allows viewing of current chiller op-
erating conditions. To scroll through the data, repeti-
tively press the arrow keys.
NOTE: This data will only be updated every 30 sec.
and should not be confused with the display
on the chiller which updates approx. every 2
seconds.
RCC OPERATING DATA MESSAGES
(Same as chiller display)
Operating Data
LWT = _____°F (°C)
RWT = _____ °F (°C)
AMBIENT AIR TEMP _____°F (°C)
OIL PRESSURE ____ PSID (BAR D)
SUCTION PRESSURE (SP) _____ PSIG (BAR G)
DISCHARGE PRESSURE (DP) ____ PSIG (BAR G)
SUCTION TEMP (ACTUAL) _____ °F (°C)
DISCH TEMP (ACTUAL) _____ °F (°C)
OIL TEMP _____ °F (°C)
DISCH TEMP (SATURATED) _____ °F (°C)
SUCTION TEMP (SATURATED) _____ °F (°C)
SLIDE VALVE POSITION = _____ % (APPROX.)
SUPERHEAT _____ °F (°C)
COMP = ____ AMPS ____ % FLA
COMP1 = AVG; PH L, 1, 2, 3
88; 92, 87, 86 %FLA
LOAD TIMER _____ SEC
UNLOAD TIMER _____ SEC
TEMP ERROR ____ °F (°C)
TEMP RATE ____ °F/MIN. (°C/MIN.)
LEAD SYSTEM IS NUMBER ____
EVAP WATER PUMP STATUS ON/OFF
EVAP HEATER STATUS ON/OFF
SYS RUN TIME
0 - 0 - 39 - 31 - D - H - M - S
LIQUID LINE SOL STATUS ON/OFF
LIQUID INJECTION VALVE STATUS ON/OFF
FORWARD FAN STATUS ON/OFF
REVERSE FAN STATUS ON/OFF
PRINT
CHILLER
OPER KEY
HISTORY
DISPLAYSAFETYSHUT-
DOWN NO . 1 (1 TO 3)
CHILLED
LIQUID
OPER DATA
RCC REMOTE WATER
WATER TEMP CONTROL
LOCAL WATER
TEMP CONTROL
OR

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NOTE: Anytime 00.00 is programmed into a Start time,
the chiller will remain in the state (on or off) it
was in at the end of the previous day. Program-
ming 00.00 for a Stop time will cause the chiller
to remain in the same state (on or off) that is
was in during that specific day. Programming
the same time for both Start and Stop times
will cause the display to enter 00.00 for both
times which will, as in the case above, cause
the chiller to remain in the same state that it
ended in the previous day.
In a situation where it is required to run the
chiller 24 hours a day, 7 days a week, the Chiller
Control panel should first have its entire Daily
Schedule zeroed (00.00) for all Start and Stop
times. This puts the chiller in the run mode at
all times. The Remote Control Center may now
be programmed with all zeroes (00.00) for all
Start and Stop times. Since the chiller panel is
already in the run mode, programming the
Remote Control Panel for all zeroes will keep
the chiller in this mode indefinitely, allowing the
chiller to run whenever demand requires.
Once the Start/Stop times for each of the days have
been programmed, the display will advance to the
HOLIDAY Start/Stop time. This allows the operator to
program a single Start and Stop time to be used on
any day(s) of the week which may require special pro-
gramming that will not require repeating the following
week. The following display will appear when all days
are scrolled through.
Holiday Start/Stop times should be programmed in the
same manner as individual weekdays. Once the times
are entered, the display will scroll to the next mes-
sage.
NOTE: In the above display, the * behind Tuesday
designates it as a holiday.
When this display appears, the cursor will first stop
behind Sunday. To designate a day as a holiday, press
the ↑or ↓ key to place an * behind a day. Pressing the
↑or ↓ key again will delete the * and the day as a Holi-
day. Pressing the ENTER/ADV key stores the desig-
nation for a given day and advances the cursor to the
next day. The cursor will advance until the final day is
programmed, which causes the display to scroll to the
MON START/STOP display.
The display will then show the setpoint and control
range which is programmed. A typical display is shown
below:
By repetitively pressing the ↑or ↓ keys, the target set-
point can be changed in 0.1°F (0.1°C) increments each
time the key is pressed. Initiate the change by press-
ing the ENTER/ADV key which will store it into memory.
Anytime the setpoint is changed remotely, the new set-
point will appear at the chiller control panel after the
next communication between the chiller and the Re-
mote Control Center.
With Switch 3 in the OPEN position or LOCAL mode,
the RCC panel will receive data from the chiller, but it
will not allow setpoint changes. This mode may be
chosen after setup to prevent unauthorized personnel
from making setpoint changes.
NOTE: Typically it is only required to change the tar-
get temperature of the chilled liquid from the
RCC. The Control Range (CR), which is the
acceptable temperature range above and be-
low the target temperature, can not be changed
from the RCC.
The SCHEDULE / ADVANCE DAY key allows the op-
erator to remotely change the daily schedule. This en-
ables remote setting of individual daily start / stop times
as well as special holiday start / stop times.
When the SCHEDULE / ADVANCE DAY key is pressed,
the following message will appear:
To view the daily schedules already programmed with
no intent of making any changes, the SCHEDULE/
ADVANCE DAY key can be repetitively pressed to scroll
through the schedule one day at a time.
To change a start/stop time, the ↑or ↓ key may be
pressed, allowing incrementing/decrementing of the
time by 15 min. each time the key is pressed.
To store the new time into memory, the ENTER/ADV
key must be pressed each time a START or a STOP
time is to be stored. Failure to ENTER (store) the new
time will cause it to be ignored. As new times are en-
tered the cursor will scroll to the next start/stop time.
SCHEDULE/
ADVANCE DAY
MON S T ART = 0 6 : 0 0 AM
STOP = 05 : 30 PM SMT*WTFS
HOL I DAY NOTED BY *
HOL START = 0 8 : 3 0 AM
STOP = 12 : 00 PM
LWT = 4 2 . 0 F
CR = 42.0 TO 44.0 F

FORM 201.11-NM1
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The Holiday Schedule programmed for a given week will
only be executed once. Once executed, a day designated
as a Holiday will automatically switch to the Daily Sched-
ule Start/Stop time. The chiller control panel will not re-
recognize Holiday progamming until a change is made to
the Holiday Schedule at the Remote Control Center.
The ON/OFF key allows the operator to remotely turn
the chiller on and off. When the ON/OFF key is pressed,
the following message will appear:
Pressing ENTER will initiate the OFF command. The
display will then be displaced with a message indicat-
ing the chiller is in the shutdown mode.
The ARROW keys will toggle the ON/OFF command
which appears on the display, which must then be fol-
lowed by ENTER. Since there may be multiple chillers,
select the particular unit using the UNIT SELECT and
arrow keys followed by ENTER.
This display will then be replaced by a current STATUS
message which will indicate present operating condi-
tions. NOTE: The REMOTE CONTROLLED SHUT-
DOWN message will appear for a few seconds until
communication of a restart is transmitted to the chiller.
PRESS ENTER TO TURN
UN I T # 1 OFF
POWER LOSS
In the event of a power loss to the Remote Control
Center, the microprocessor in the chiller control panel
will continue to adhere to the setpoints and commands
dictated from the Remote Control Center prior to the
power loss for five minutes. At the end of the five-minute
period, the chiller will revert to local control if communi-
cation is not re-established. When communications are
re-established after power is returned, the chiller will
honor all commands programmed into the Remote
Control Center.
In the case of a remote shutdown before the power
loss occurred, the chiller may start on local control, if
demand exists, after five minutes. The chiller will con-
tinue to run until demand shuts it off or until communi-
cation is re-established. When communication returns,
the chiller will shut down, honoring the remote shut-
down that was commanded prior to the communica-
tions loss. The ability to do this is built into the chiller
micro, which remembers the setpoints/control com-
mands established before the communications loss.
U 1 REMOTE CONTROL LED
SHUTDOWN
ON
OFF

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PRINTER
The Remote Control Center allows the operator to ob-
tain a remote printout through the Remote Control Cen-
ter as far as 4000 ft. (1219 m) of wiring from the chiller
permits. This is in contrast to typical printer hookups
which must be no furter than 25 ft. (7.6 m) from the
chiller. NOTE: The printer may not be located beyond
25 ft. of wiring from the Remote Control Center.
A Weigh-Tronix 1220 Dot Matrix printer is recom-
mended. Wiring for this printer is shown in Fig. 2.
All wiring connections at the printer, printer configura-
tion and printer restrictions that apply with the chiller
control panel also apply. See the Installation and Op-
eration Manual for the chiller.
A printout of current system data is initiated by press-
ing the PRINT CHILLER OPER DATA key on the Re-
mote Control Center. This printout is similar to the one
obtained locally from the chiller.
A printout of the last three fault shutdowns may be ob-
tained by pressing the HISTORY key. This printout is
similar to the one obtained locally from the chiller.
Any time a fault occurs, an automatic printout is gener-
ated. This printout will be a printout of operating condi-
tions at the instant that the fault occurs.
FIG. 3  PRINTER WIRING
LD02722