York YCAS0130 manual Micro Panel Contents, SWITCH 1 Water / Glycol Cooling Open, Closed

Micro Panel Contents

3.5% MOTOR CURRENT KEY

Pressing the Motor Current key displays compressor current for each system:

C O M P	1 = 6 3	A M P	8 5 % F L A
C O M P	2 = 3 0	A M P	4 1 % F L A

This display shows the average motor current in amps and average compressor motor current as a percentage of FLA. All values are approximate.

I S N	C R N T	L	I M I	T	:	N O N E
E M S	C R N T	L	I M I	T	:	N O N E

On the second press of the of the Motor Current Key, the current limit values as set by the ISN (Remote BAS System) and EMS-PWM current limiting input are displayed, if they are active. See Sections 1.10, and 2.4 for more details.

3.6OPERATING HRS / START COUNTER KEY

When the Operating Hours / Starts Counter key is pressed, the accumulated running hours and starts for System 1 and 2 compressors are displayed. Where ap- plicable, pressing the key again displays the values for Systems 3 and 4 on larger models:

H R S	1	=	1	1	4	3	. 2		=	1	3	8	2
S T R	1	=		2	8	5	. 2		=		3	2	2
H R S	3	=	1	2	5	5	.	4	=	1	0	9	5
S T R	3	=		3	6	5	.	4	=		4	5	5

Display Limits : Maximum run hours 99,999 Maximum starts 99,999

Values roll over to zero, if the maximum limit is ex- ceeded.

These counters are zeroed at the fac- tory, but may indicate run time and number of starts logged during fac- tory testing prior to shipment.

3.7OPTIONS KEY &

DIP SWITCH SETTINGS

The Options key provides a display of options which are programmed by the positions of the S1 Dip Switches on the Microprocessor Board. Proper programming of

FORM 201.19-NM1 (204)

the switches is important during the commissioning of the chiller. The Options key can be used to verify the Dip Switch positions without looking at or handling the Microprocessor Board.

Each press of the key will scroll to the next option/dip switch setting. Option Switch Messages (S1-1 to S1-

8)will then be displayed in sequence. At the end of the sequence, the display will automatically revert to the first Option Switch message.

The following is a detailed guide to programming the Dip Switches together with the associated display mes- sage provided for each selection when the Options key is pressed:

SWITCH 1: Water / Glycol Cooling

Open:

S 1 - 1 C H I L L E D L I Q U I D W A T E R

Water Cooling Mode is for water cooling applications and allows the chilled liquid leaving temperature set- point to be programmed from 40 to 70 °F (4 to 21°C). Selecting this mode also auto-programs the Low Chilled Liquid Cut-Out at 36°F (2°C) and the Suction Pressure Cut-Out at 44 PSIG (3 bar).

Closed:

S 1 - 1 C H I L L E D L I Q U I D

G L Y C O L

Glycol Cooling Mode is for brine/glycol applications with setpoints below 40°F (4°C) and allows the chilled liquid leaving temperature setpoint to be programmed from 10 to 70°F (-12 - 21°C). In this mode, the Low Chilled Liquid Cut-Out can be programmed from 8 to 36° F (-13 to 2°C) and the Suction Pressure Cut-Out programmed from 20 to 70 PSIG (1 to 5 bar) for R-22 models and 5 to 70 PSIG (0.3 to 5 bar) for R407C models.

SWITCH 2: Ambient Temp. Range Low Ambient Cutout

Open:

S 1 - 2 A M B I E N T C O N T R O L S T A N D A R D

Standard Ambient Mode auto-programs the Low Ambient Cutout setting at 25°F (-4°C) and is not adjustable.

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