York YCAL0012EC, Установка, эксплуатация и обслуживание

Страница: 121 / 166

FORM 150.66-NM2
ISSUE DATE: 09/25/2020
121
JOHNSON CONTROLS
SECTION 7 - UNIT CONTROlS
7
When communications is required with a BAS or
OptiView Panel, individual unit IDs are necessary for
communications with specific chillers on a single RS-
485 line. ID 0-7 is selectable.
This messages only appears and is programmable when
EEV is selected as the expansion valve type in the
Service Mode. EEV must only be selected when an EEV
is installed. Superheat is programmable between 10°F
to 15°F. A setpoint of 12°F to 15°F is recommended.
S Y S 1 S U C T S U P E R H E A T
S E T P O I N T = X X . X ° F
UNIT TRIP VOLTS
For total chiller high current trip programming on
460 VAC chillers:
• Add the sum of all the compressor and fan
RlA’s in the chiller.
• Multiply the sum by 1.25
• Divide by 225 A
• The resulting voltage is the value that should be
programmed.
For example, if fan and compressor RLA’s total 180 A:
5V x 180 A x 1.25 = 1125 VA = 5.0 V
225 A 225 A
The programmed value will be 5.0 V.
R E M O T E U N I T I D
P R O G R A M M E D = X
TABLE 16 – PROGRAM KEY LIMITS AND DEFAULTS
* The minimum discharge pressure allowed is 160 psig. The fan differential Off Pressure will be lowered to prevent going below 160
psig based on where the fan control On Pressure is programmed.
PROGRAM VALUE MODE LOW LIMIT HIGH LIMIT DEFAULT
DISChARGE PRESSURE CUTOUT
—
325 psig 575 psig 570 psig
22.4 barg 39.6 barg 39.3 barg
SUCTION PRESSURE CUTOUT
WATER COOlING 80.0 psig
120 psig 80.0 psig
5.52 barg 8.27 barg
5.52 barg
GlyCOl COOlING 42.0 psig
70.0 psig 44.0 psig
2.9 barg
4.83 barg 3.03 barg
lOW AMBIENT TEMP. CUTOUT
STANDARD AMBIENT 25.0°F
60.0°F 25.0°F
-3.9°C 15.6°C -3.9°C
lOW AMBIENT 0°F
60.0°F 25.0°F
-17.8°C
15.6°C -3.9°C
lEAVING ChIllED lIQUID
WATER COOlING — —
36°F
2.2°C
TEMPERATURE CUTOUT
GlyCOl COOlING
8.0°F 36.0°F 36.0°F
-13.3°C
2.2°C 2.2°C
ANTI-RECyClE TIMER —
300 SEC. 600 SEC. 600 SEC.
FAN CONTROl ON PRESSURE
— 360 psig
485 psig 385 psig
24.8 barg 33.4 barg 26.5 barg
FAN DIFFERENTIAl OFF PRESSURE
—
50 psig 100 psid* 80 psid
3.45 barg 6.89 barg* 5.52 barg
TOTAl NUMBER OF COMPRESSORS
SINGlE SySTEM 2 3 3
CURRENT FEEDBACK
UNIT/SySTEM TRIP VOlTS
OPTION ENABlED 0.5 4.5 2
ONE PER UNIT
REMOTE UNIT ID
— 0 7 0
SySTEM 1 SUPERhEAT SETPOINT EEV
10.0°F 15.0°F 12.0°F
5.5°C
8.3°C 6.6°C