Table 25 - Programmable Operating Parameters - York YVAA Installation Operation & Maintenance

Form 201.47-ICOM1
Issue date: 17/11/2022
The programmed temperature ensures the micro will
sense a loss of educator oil flow, if the temperature dif-
ferential rises. A small differential of 2.8°C (5.0°F) is
recommended.
Eductor safety time
PROGRAM ◄DEF XXXXX LO XXXXX HI XXXXX
EDUCTOR SAFETY TIME
The educator safety time allows programming the
time period the system is permitted to run if the safety
threshold is exceeded. The safety time is program-
mable for 10 minutes to 1000 minutes with 10 min-
utes as the default. A minimum safety time is recom-
mended to ensure the compressor is not starved for oil
for long periods of time due to the educator circuit not
siphoning oil from the evaporator. A minimum time of
10 minutes is recommended as the program point.

Table 25 - Programmable operating parameters

Program value
Suction pressure cutout
Suction pressure cutout
Low ambient air temperature cutout
Leaving chilled liquid temperature cutout
Motor current limit
Pulldown motor current limit
Pulldown motor current limit time
Condenser subcooling setpoint
Unit ID number
Sound limit setpoint
Eductor temperature differential
Eductor safety time
Motor temperature unload
JOHNSON CONTROLS
Motor temperature unload
PROGRAM
MOTOR TEMPERATURE UNLOAD
The motor temperature unload is programmable from
65.6°C (150.0°F) to 121.1°C 250.0°F. The default val-
ue is 115.5°C (240.0°F). The programmed temperature
ensures the micro will sense a rise in motor temperature
= XXXX MIN
due to a lack of compressor cooling. If the temperature
rises above the programmed threshold, the system will
unload the compressor by reducing speed. An unload
temperature of 115.5°C (240.0°F) is recommended to
ensure the system does provides maximum capacity.
Default values
A listing of the low limits, high limits, and default
values for each of the programmable values is noted
in each display and can be found in Table 18 on page
141. Note that the Imperial units are exact values
while the Metric units are only approximate.
Mode
Water
cooling (R-134a)
Glycol
cooling (R-134a)
Water
cooling (R-513A)
Glycol
cooling (R-513A)
Water
cooling
Glycol
cooling
Sound limit
option enabled
SECTION 8 - MICROPANEL
◄DEF XXXXX LO XXXXX HI XXXXX
Low limit High limit
26.1 psig 36.0 psig
1.80 barg 2.48 barg
5.0 psig 36.0 psig
0.34 barg 2.48 barg
30.2 psig 40.7 psig
2.08 barg 2.80 barg
7.7 psig 40.7 psig
0.53 barg 2.80 barg
-10.0°F 50.0°F
-23.3°C 10°C
11.0°F 36.0°F
-11.7°C 2.2°C
30% FLA 103% FLA
30% FLA 100% FLA
0 min 255 min
0.0°F 20.0°F
0.0°C 11.1°C
0 7
0% 100%
5.0°F 50.0°F
2.77°C 27.8°C
10 min 1000 min
150.0°F 250.0°F
65.6°C 121.1°C
= XXX °F
8
Default
26.1 psig
1.80 barg
26.1 psig
1.80 barg
30.2 psig
2.08 barg
30.2 psig
2.08 barg
-2.0°F
-18.9°C
36.0°F
2.2°C
36.0°F
2.2°C
103% FLA
100% FLA
0 min
5.0°F
2.8°C
0
0%
15.0°F
8.3°C
30 min*
240.0°F
115.5°C
141