Options Key And Dip Switch Settings - York MILLENNIUM YCAR0315 Installation Operation & Maintenance

Micro Panel
H R S 1 = 1 1 4 3 , 2
S T R 1 = 2 8 5 , 2
H R S 3 = 1 2 5 5 , 4
S T R 3 = 3 6 5 , 4
Display Limits : Maximum run hours 99,999
Maximum starts 99,999
Values roll over to zero, if the maximum limit is exceeded.
These counters are zeroed at the fac-
tory, but may indicate run time and
number of starts logged during factory
testing prior to shipment.

3.7 OPTIONS KEY AND DIP SWITCH SETTINGS

The Options key provides a display of the unit set-up
options which are programmed by the positions of the
S1 Dip Switches (Fig. 39) on the Microprocessor Board.
Proper programming of the switches is important dur-
ing 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.
Three Option Switch Messages (S1-1 to S1-3) 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 / Brine Cooling
Open:
S 1 - 1 C H I L L E D
W A T E R
Water Cooling Mode is for water cooling applications
and allows the chilled liquid leaving temperature setpoint
to be programmed from 4.4 to 11.1°C (40 to 52 °F).
Selecting this mode also auto-programs the Low Chilled
Liquid Cutout at 2°C (36°F) and the Suction Pressure
Cutout at 3 bar (44 PSIG).
124
Closed:
= 1 3 8 2
= 3 2 2
S 1 - 1
= 1 0 9 5
Brine Cooling Mode is for brine/glycol applications with
= 4 5 5
setpoints below 4°C (40°F) and allows the chilled liquid
leaving temperature setpoint to be programmed from
-12 - 11.1°C (10 to 52°F). In this mode, the Low Chilled
Liquid Cutout can be programmed from -13 to 2°C (8 to
36°F) and the Suction Pressure Cutout programmed from
1 to 5 bar (20 to 70 PSIG) for R-22 models and 0.3 to 5
bar (5 to 70 PSIG) for R-407C models.
SWITCH 2 : Ambient Temp. Low Limit
Open:
S 1 - 2
Standard Ambient Mode auto-programs the Low Ambi-
ent Cutout setting at -4°C (25°F) and is not adjustable.
Closed:
S 1 - 2
Low Ambient Mode allows the Low Ambient Cutout
to be programmed from -18 to 10°C (0 to 50 °F). Val-
ues above -4°C (25°F) can be used to automatically shut
down the chiller when direct cooling methods become
operational.
SWITCH 3 : Refrigerant
Open:
S 1 - 3
The R-407C Mode MUST be selected for models using
refrigerant R-407C. Incorrect selection of this switch
may cause serious damage to the chiller.
Closed:
L I Q U I D
S 1 - 3
The R-22 Mode MUST be selected for models using
refrigerant type R-22. Incorrect selection of this switch
may cause serious damage to the chiller.
FORM 150.52-NM2 (1001)
C H I L L E D L I Q U I D
G L Y C O L
A M B I E N T C O N T R O L
S T A N D A R D
A M B I E N T C O N T R O L
L O W A M B I E N T
R E F R I G E R A N T
R - 4 0 7 C
R E F R I G E R A N T
R - 2 2
YORK INTERNATIONAL