32 YORK INTERNATIONAL
SINGLE CIRCUIT UNITS
MICRO LOGIC BOARD DIP SWITCH CONFIGURA-
TION (REV. C BOARDS) METRIC ONLY** (GEII.4M
REV. 1 EPROM)
A Dip Switch (U39) with 7 miniature rocker switches is
located on the Micro Logic Board (Fig. 26). These
switches must be configured properly before starting the
chiller. See the list on the right and set up the switches
as required.
FIG. 26 – MICRO LOGIC BOARD (OPTIONAL METRIC UNITS)
1 = OFF: Computed RWT Setpoint (page 26) or
Desired LWT Setpoint (page 28) falls
into the range of –9.9°C to 0°C
ON: Computed RWT Setpoint (page 26)
or Desired LWT Setpoint (page 28) falls
into the range of 0° to 9.9°C
2 = OFF: Low Ambient Cut-out = 1.7°C
ON: Low Ambient Cut-out adjustable –17.8°
to 10°C (R1 Combo Board)
3 = OFF: RWT Control (Standard as Shipped)
ON: LWT Control
4 = OFF: No EMS Control (No Digital Input Board,
Standard As Shipped)
ON: EMS Control (Optional Digital Input
Board Installed)
5 = Spare
6 = Spare
7 = Spare
LD01625
* Refer to above sketch to identify “OFF” and “ON” positions.
The “dot” can be misleading when identifying switch position.
See the “Side View” drawings for recommended position veri-
fication.
** Micro Logic Boards for Standard, Brine and Metric duty are identi-
cal. Only the EPROMs are changed.
U39
YCHA
G.E. II. 4M,
REV. 1
EPROM
00009TG(R)
To Next Page
Loading...
