Figure 45 - Flow Switch Set; Figure 46 - Flow Below The Representation Range; Figure 47 - Flow Exceeds The Representation Range - York YVAA Installation Operation & Maintenance

SECTION 6 - COMMISSIONING
Setting the thermal dispersion flow switch
To set up the flow switch, perform a high-flow adjust-
ment, which is a quick reaction with falling low.
1. Make sure that the normal flow circulates through
the evaporator.
2. Switch on the power supply of the control.
3. Turn on and turn off all LEDs step by step. Make
sure that the output is closed and the unit is in op-
eration mode during this process.
4. Press and hold the ► push button until LED 9
turns on.
The flow switch is adapted to the flow conditions of
the unit.
When the flow switch is set up, the LED indicates light
as follows:
• LED 0, LED 1, LED 2, LED 3, LED 4, LED 5,
LED 6, LED 8, and LED 9: green
• LED 7: orange
LOW
0 1 2 3 4

Figure 45 - Flow switch set

When the normal flow is below the representation
range of the display, the LED displays in a similar way
to the following example:
LOW
0 1 2 3 4

Figure 46 - Flow below the representation range

When the normal flow exceeds the representation
range of the display, the LED displays the following:
LOW
0 1 2 3 4

Figure 47 - Flow exceeds the representation range

96
HIGH
5 6 7 8 9
LD29414
HIGH
5 6 7 8 9
LD29415
HIGH
5 6 7 8 9
LD29416
Temperature sensors
Ensure that the leaving
sensor is coated with heat conductive compound
(Part No. 013-00898-000) and is inserted to the bottom
of the water outlet sensor well in the evaporator. This
sensor is part of the pump control freeze protection
operation. It provides a level of freeze protection and
must always be fully inserted in the water outlet sensor
well.
Programmed options
Verify that the options factory-programmed into the
Micro Panel are in accordance with the customer's
order requirements by pressing the OPTIONS key on
the keypad and reading the settings from the display.
Programmed settings
Ensure the system cutout and operational settings
are in accordance with the operating requirements by
pressing the PROGRAM key.
Date and time
Program the date and time by first ensuring that the CLK
jumper JP2 on the Chiller Control Board is in the ON
position. Then press the DATE/TIME key and set the
date and time. See Date/Time and Schedule Keys on
Page 152.
Start/stop schedule
Program the daily and holiday start/stop by pressing
the SCHEDULE key. See Date/Time and Schedule
Keys on Page 152.
Setpoint and remote offset
Set the required leaving chilled liquid temperature
setpoint and Control Range under the SETPOINTS key.
The chilled liquid temperature control settings need to
be set according to the required operating conditions.
If remote temperature reset (offset) is to be used, the
maximum reset required must be programmed by
pressing the SETPOINTS key. See Setpoints Key on
Page 137.
Form 201.47-ICOM1
Issue date: 17/11/2022
liquid temperature
JOHNSON CONTROLS