background image

11

JOHNSON CONTROLS

FORM 155.21-W2 (1209)

The maximum rate at which the OptiView control pan

el will accept Remote Steam/Hot Water Limit setpoint 

pulses is one pulse each 60 seconds. Following a remote 

setpoint  pulse,  the  Steam/Hot  Water  Limit  setpoint 

changes to the value corresponding to the pulse‑width. 

if a second reset pulse is not received within 30 minutes 

of the first pulse, the Steam/Hot Water setpoint reverts 

to  the  programmed  maximum  load  limit  setpoint.  If 

the “Pulldown Demand Limit” has been programmed 

and the unit was started and has run less than the Pull

down Demand Limit Timer setpoint, then the unit will 

be steam/hot water limited by  the lower of  the Pull

down Demand Limit and the Remote Steam/Hot Water 

Limit. The Pulldown Demand Limit will automatically 

transfer control of Steam/Hot Water Limit function to 

REMOTE

” at the end of its programmed timed cycle 

with the unit in the "REMOTE" mode. 

REMOTE LEAVING CHILLED LIQUID 

TEMPERATURE SETPOINT

Remote Leaving Chiller Liquid Temperature setpoint 

allows an operator to change the leaving chilled liquid 

temperature from a remote location. Before this can be 

accomplished the “Remote Reset Range” must be set

up locally on the OptiView panel by a qualified YORK/

Johnson Controls service technician. This parameter is 

the  maximum allowable offset  of  the  leaving  chilled 

liquid  setpoint  when  operating  in  the  Remote  mode. 

This offset is either 10°F or 20°F as programmed. If 

not programmed, the default value is 20°F. This value 

is added to the operator programmed “Leaving Chilled 

Liquid Temperature Setpoint” (base) and the sum equal 

the temperature range in which the setpoint can be reset. 

For example, if the operator has locally programmed 

a  setpoint  for  44°F  (base)  into  the  OptiView  control 

center, and the “Remote Reset Range” is programmed 

to be 10°F, then the energy management system can 

remotely reset the setpoint over the range of 44°F to 54 

°F (44 + 10 = 54). 

the Remote leaving Chilled liquid 

temperature  setpoint  cannot  be  set 

lower than the base setpoint value. the 

base or locally programmed setpoint is 

always shown in the “local lCHlt 

Setpoint” box in the lower left corner 

of the Evaporator / Absorber screen. 

REMOTE LEAVING CHILLED LIQUID 

TEMPERATURE SETPOINT 

(CONTROL SIGNAL; ANALOG, 0‑10VDC) 

Remote Leaving Chilled Liquid Temperature setpoint 

can be accomplished by supplying (by others) a con

stant 0-10VDC signal to the OptiView control center. 

The  Leaving  Chilled  Liquid  Temperature  setpoint  is 

programmable over the range of 40°F to 97°F (if Re

mote Reset Range is 20) otherwise 87°F will be the top 

end of the range. The OptiView control center must be 

configured  appropriately  to  accept  the  desired  signal 

as follows:

  •  The appropriate signal source mode must be se

lected. It is recommended that a qualified YORK/

Johnson Controls service technician accomplish this 

in the local/service mode on the OptiView control 

center. Analog mode must be selected when using 

a 0-10 voltage. 

  •  Microboard program jumper JP24 must be removed 

to accept the analog signal. it is recommended that 

a qualified YORK/Johnson Controls service techni

cian position this jumper. 

FIG. 18 –

 REMOTE LEAVING CHILLED LIQUID 

TEMPERATURE SETPOINT WITH 

0-10VDC SIGNAL

8

J7

+

-

9

LD14446

As shown above, connect the input to microboard J7-8 

(signal) and J7‑9 (ground). The leaving chilled water 

can  then  be  changed  remotely.  It  cannot  be  changed 

lower than the locally set (base) setpoint nor can it go 

any  higher  than  the  remote  reset  range  value.  if  the 

OptiView panel is taken out of analog mode for any 

reason, the setpoint will revert back to the locally pro

grammed setpoint. 

Summary of Contents for York YIA Series

Page 1: ...nnection for the following operations Remote Stop Contacts See Fig 8 Remote Start Contacts See Fig 8 Remote Local Cycling Devices See Fig 9 Multi unit sequence See Fig 10 1 The OptiView Control Center...

Page 2: ...ndividual shall also be familiar with and comply with all applicable governmental standards and regula tions pertaining to the task in question safety symbols The following symbols are used in this do...

Page 3: ...L OPERATION INDIVIDUAL UNIT PUMPS 9 FIG 15 MULTIPLE UNITS TWO PARALLEL OpERATION SINGLE CHILLED WATER PUMP 9 FIG 16 REMOTE Steam Hot Water Limit SETPOINT with 0 10vdc signal 10 FIG 17 REMOTE Steam Hot...

Page 4: ...R14 2 R58 R52 R50 R40 R38 R22 C8 R16 CR5 R56 R60 R54 R44 R42 R34 R36 R32 R26 R28 R24 R20 R18 R17 R1 R13 U1 U4 U3 R3 R15 R11 U5 R5 C1 CR2 CR3 CR8 RV7 CR7 RV6 CR6 RV3 RV2 R30 R2 Q2 R10 R4 U2 R12 R6 U6...

Page 5: ...View Control Center is in digital analog or ISN remote op erating mode allow ing for energy management system or remote start stop control Fig 8 2 All chiller safety cut out controls are in the normal...

Page 6: ...D06824 N O CONTACTS IN CONTROL CENTER RATED 2 AMPS INDUC TION AT 250VAC 30VDC 5 AMPS RESISTIVE AT 250VAC 30VDC closure of the Energy Management System Remote Stop Contacts causes the chiller to shutdo...

Page 7: ...l type flow switch is used the flow switch uses the cooling effect of liquid to sense flow When the flow of liquid is sensed the solid state relay output is turned on conducting current through the mi...

Page 8: ...tat RWTwill automatically cycle either 1 or 2 unit Timer 3TR is an additional feature which prevents simultaneous starting of lead and lag unit following a power failure and eliminates nuisance starti...

Page 9: ...p is avoided When one unit is cut out by the sequence control Fig 12 the temperature of the supply chilled water does not change MULTIPLE UNITS TWO PARALLEL OpERATION SINGLE CHILLED WATER PUMP For thi...

Page 10: ...inputs as follows Example if the input is 3VDC the setpoint would be set to 73 as follows SETPOINT 100 3 x 9 100 27 73 Therefore a 2 second pulse 10 3 sec 20 4 sec 30 up to 11 sec which will 100 Calc...

Page 11: ...rammed a setpoint for 44 F base into the OptiView control center and the Remote Reset Range is programmed to be 10 F then the energy management system can remotely reset the setpoint over the range of...

Page 12: ...et Range setpoint is for 10 F and the local Leaving Chilled Liquid Temperature Setpoint is programmed for 40 F the setpoint would be set to 44 F as follows OFFSET F 5 1 10 10 4 10 10 40 10 4 F SETPOIN...

Page 13: ...following message SAFETYSHUTDOWN MANUALRESTART and the cause of shutdown RUN CONTACTS REMOTE RUN LIGHT AND SHUTDOWN INDICATOR PLUS EMS When run contacts are required for a Remote Run Light and or Shu...

Page 14: ...is flowing the flow switch con tact will close If the flow switch opens for 2 seconds the unit shuts down GENERATOR BACKUP TRANSFER During a prolonged power failure the unit will shutdown without goin...

Page 15: ...and TB6 in YORK OptiView Control Center as 115VAC source is fed from terminals 1 and 2 16 Entering and Leaving Chilled and CondenserWaterTem perature Sensors are supplied by YORK as a standard item on...

Page 16: ...861 1001 www york com P O Box 1592 York Pennsylvania USA 17405 1592 Subject to change without notice Printed in USA Copyright by Johnson Controls Inc 2009 ALL RIGHTS RESERVED Form 155 21 W2 1209 NEW...

Reviews: