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YORK INTERNATIONAL

12

• Micro Board Program Jumper JP24 must be posi-

tioned appropriately per the input signal type as de-
tailed below. It is recommended a qualified Service
Technician position this jumper.

Important! The signal type used for
Remote Leaving Chilled Liquid Tem-
perature setpoint reset and the signal
type used for Remote Current Limit
setpoint reset must be the same. For
example, if a 0-10VDC signal is be-
ing used for Remote Current Limit
Setpoint, then a 0-10VDC signal must
be used for Leaving Chilled Liquid
Temperature reset.

0-10VDC - As shown in Fig. 18, connect input to Mi-
cro Board J22-3 (signal) and J22-5 (Gnd). A 0VDC
signal produces a 0°F offset. A 10VDC signal produces
the maximum offset (10 or 20°F above the Local Setpoint
value). The setpoint is changed linearly between these
extremes as the input varies linearly over the range of
0VDC to 10VDC. This input will only be accepted when
“Analog” Remote Mode is selected., the “Remote
Analog Input Range” 
setpoint is set for “0-10VDC”
and Micro Board Program Jumper JP24 has been re-
moved. Calculate the setpoint for various inputs as fol-
lows:

OFFSET(°F) = (VDC)(REMOTE RESET TEMP. RANGE)

        10

SETPOINT(°F) = LOCAL SE OFFSET

For example, if the input is 5VDC and the Remote Re-
set Temp Range setpoint is programmed for 10°F and
the Local Leaving Chilled Liquid Temperature setpoint
is programmed for 40°F, the setpoint would be set to
45°F as follows:

        OFFSET (°F) = 5 X 10

     10

= 50
   10

= 5°F

    SETPOINT (°F)

= 40 + 5

= 45°F

2-10VDC - As shown in Fig. 18, connect input to Mi-
cro Board J22-3 (signal) and J2-5 (Gnd). A 2VDC sig-
nal produces a 0°F offset. A 10VDC signal produces
the maximum allowed offset (10°F or 20°F above the
Local Setpoint Value). The setpoint is changed linearly
between these extremes as the input varies over the
range of 2VDC to 10VDC. This input will only be ac-
cepted when “Analog” Remote Mode is selected,
the  “Remote Analog Input Range” setpoint is set
for “2-10VDC” and the Micro Board Program Jumper
JP24 has been removed. Calculate the setpoint for vari-
ous inputs as follows:

OFFSET (°F) = (VDC – 2)(REMOTE RESET TEMP. RANGE)

8

SETPOINT (°F) = LOCAL SE OFFSET

For example, if the input is 5VDC and the Remote Re-
set Temp. Range setpoint is programmed for 40°F, the
setpoint would be set to 43.8°F.

OFFSET (°F)

= (5 – 2)(10)

   8

= (3)(10)
      8

= 30
    8

      SETPOINT (°F) = 40 + 3.8

= 43.8°F

SIGNAL

COMMON

5

4

+

J22

FIG. 19 – REMOTE LEAVING CHILLED LIQUID TEMP.

SETPOINT WITH 0-20MA OR 4-20MA
SIGNAL

LD04501

SIGNAL

COMMON

5

3

+

J22

FIG. 18 – REMOTE LEAVING CHILLED LIQUID TEMP.

SETPOINT WITH 0-10VDC OR 2-10 VDC
SIGNAL

LD04500

Summary of Contents for MILLENNIUM YT J

Page 1: ...isions for remote setpoint reset of leaving chilled liquid tempera ture and current limit for EMS interfacing See Note 7 Five sets of unit status contacts are factory furnished through a field wiring...

Page 2: ...f full load amperes for 1 to 255 minutes following each compressor start For more details refer to Graphic Control Center Instructions Form 160 55 O1 6 Controlling the maximum allowable compressor mot...

Page 3: ...ical Starter Manual Reset Overloads 9 2300 To 4160 Volts U l Or C S A Approved Units Only Fig 15 Remote Current Limit Setpoint With 0 10VDC 0r 2 10VDC Signal 10 Fig 16 Remote Current Limit Setpoint Wi...

Page 4: ...READY TO START CONTACTS When closed these contacts signify the following 1 The Graphic Control Center is in digital ana log or ISN remote operating mode allowing for energy management system or remot...

Page 5: ...performed by plac ing the Graphic Control Center COMPRESSOR Switch in the Stop Reset position O The unit can then be restarted Safety Shutdown contacts function in all op erating modes FIG 5 ANTICIPAT...

Page 6: ...essor from the Graphic Control Cen ter and prevent the chiller from restart ing However the operator cannot lo cally start the compressor using com pressor start switch when the con trol center is in...

Page 7: ...e following message CYCLING SHUTDOWN AUTO RE START and CONDENSER FLOW SWITCH OPEN LD04390 FIG 8 MULTI UNIT SEQUENCE FIG 9 CONDENSER WATER FLOW INTERLOCK LD04391 FIG 8 MULTI UNIT SEQUENCE For multiple...

Page 8: ...T SEQUENCE CONTROL Provides that cycling thermostat RWT will automati cally cycle either 1 or 2 unit Timer 3TR is an addi tional feature which prevents simultaneous starting of lead and lag unit follo...

Page 9: ...ature when both units are operating When either unit is cycled off by the sequence control Fig 10 mixed chilled water temperature will rise as a result of uncooled return wa ter flowing through the in...

Page 10: ...Liquid Temperature Reset then a 0 10VDC signal must be used for Re mote Current Limit Reset SIGNAL COMMON 5 1 J22 LD04498 0 10VDC As shown in Fig 15 connect input to Mi cro Board J22 1 signal and J22...

Page 11: ...input will only be accepted in Digital Re mote Mode Calculate the setpoint for various pulse widths as follows SETPOINT 100 PULSE WIDTH IN SECONDS 1 X 7 For example if the relay contacts close for 3...

Page 12: ...F LOCAL SETPOINT OFFSET For example if the input is 5VDC and the Remote Re set Temp Range setpoint is programmed for 10 F and the Local Leaving Chilled Liquid Temperature setpoint is programmed for 40...

Page 13: ...ed offset 10 or 20 F above the local setpoint value The setpoint is changed linearly between these extremes as the input varies over the range of 0 20mA This input will only be accepted when Ana log R...

Page 14: ...em perature high discharge temperature auxiliary safety power failure when the Auto Restart After Power Fail ure Dip Switch on the Micro Board Fig 21 is in the OFFposition SW1 position5 OFF whichimpli...

Page 15: ...System EMS connect by others as shown in the diagram The EMS control relay shutdown and run lights are furnished by others When the N O contacts close between terminals 35 and 36 on field wiring ter...

Page 16: ...onsor of the 2000 U S Olympic Team 36USC380 P O Box 1592 York Pennsylvania USA 17405 1592 Subject to change without notice Printed in USA Copyright by York International Corporation 1999 ALL RIGHTS RE...

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