Table of Contents
Advertisement
Microboard
ON: Enables anti-recycle timer. Solid State
Start er and Electro-mechanical start er ap pli -
ca tions - Chill er can not be started at intervals
short er than once every 30 minutes. VSD ap-
pli ca tions (JP37 Out) – Chill er can be started at
the completion of SYSTEM COASTDOWN
at intervals short er than once every 10 minutes
up to 5 times. On the 5th shutdown, a 10 minute
timer is started and restart is inhibited un til the
timer has elapsed.
OFF: Disables anti-recycle timer. Chiller can be
start ed at the completion of SYSTEM COAST-
DOWN, re gard less of how long the chill er had
been running.
7 -
Compressor Motor Variable Speed Drive
- Mo tor/Pow er Line frequency application.
ON: 50 Hz
OFF: 60 Hz
8 -
Chilled Water Pump operation - Determines
Chilled Water Pump control contacts (I/O Board
TB2-44/45) op er a tion when chiller shuts down
on various CY CLING shutdowns.
ON: Enhanced operation. Contacts open at
com ple tion of System Coastdown after all
shut downs ex cept when it shuts down on
"LEAV ING CHILLED LIQUID - LOW
TEM PER A TURE", "MULTIUNIT CY-
CLING - CON TACTS OPEN" AND "SYS-
TEM CY CLING - CONTACTS OPEN".
5.0 VDC
JP8
10 K
JP7
NOTES:
1. J6-6 not connected (N.C.) to Backlight Inverter Board when dis play is manufactured by Sharp or NEC.
2. The position of Program Jumpers JP7 & JP8 determine the out put at J6-7; In = Variable Voltage; Out = Variable Resistance. Refer to Program
Jumper Listing in Table 1 for applications.
3. Potentiometer is actually an integrated circuit that is the electrical equivalent of a 10K
FIG. 10 – MICROBOARD LAMP DIMMER CIRCUIT
34
9 -
10 -
11 -
12 -
J6
6
BRIGHTNESS CONTROL (+) OR (N.C.)
7
BRIGHTNESS CONTROL (WIPER)
8
BRIGHTNESS CONTROL (-)
LD04054
OFF: Standard operation. Contacts open at
com ple tion of System Coastdown after all
shut downs ex cept when chiller shuts down
on "LEAV ING CHILLED LIQUID - LOW
TEM PER A TURE" . On Low Wa ter temp shut-
downs, they re main closed, causing the pump to
continue to run while the chiller is shut down.
Not Used
Not Used
Not Used
Watchdog Protection -Used in conjunction with
Pro gram Jumper JP1 (see above) to enable/dis-
able the pro gram watchdog protection. With JP1
IN, this switch setting has no effect. With JP1
OUT, this switch setting determines wheth er the
watchdog protection is en abled or dis abled.
NEVER disable the watch dog pro-
tec tion! Severe compressor or chill er
dam age could result. The abil i ty to
dis able the watch dog pro tec tion is
pro vid ed for YORK fac to ry test ing
only.
ON: Watchdog protection enabled.
OFF: Watch dog protection disabled.
TO
BACKLIGHT
INVERTER
BOARD
potentiometer.
FORM 160.54-M1(503)
YORK INTERNATIONAL
Advertisement
Table of Contents
