York YVAA Style A, Установка, эксплуатация и обслуживание

Страница: 99 / 184

SECTION 6 - COMMISSIONING
JOHNSON CONTROLS
99
Form 201.28-NM1.1
Issue date: 08/06/2021
6
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
Figure 23 - Flow switch set
0 1 2 3 4 5 6 7 8 9
LOW HIGH
LD29414
When the normal flow is below the representation
range of the display, the LED displays in a similar way
to the following example:
0 1 2 3 4 5 6 7 8 9
LOW HIGH
LD29415
Figure 24 - Flow below the representation range
When the normal flow exceeds the representation
range of the display, the LED displays the following:
0 1 2 3 4 5 6 7 8 9
LOW HIGH
LD29416
Figure 25 - Flow exceeds the representation range
Temperature sensors
Ensure that the leaving liquid temperature
sensor is coated with heat conductive compound
(Part No. 013-00890-000) 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 some 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 157 ).
Start/Stop schedule
Program the daily and holiday start/stop by pressing
the SCHEDULE key (see
Date/Time and Schedule Keys
on Page 157 ).
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 149 ).