McQuay AGS 225D, Руководство по эксплуатации

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60 OM AGSD-1
Most menus containing setpoint values have several different setpoints shown on one menu
screen. When in a setpoint menu, the ENTER key is used to proceed from the top line to the
second line and on downward. The cursor will blink at the entry point for making a change.
The ARROW keys (now in the edit mode) are used to change the setpoint as described
above. When the change has been made, press the ENTER key to enter it. Nothing is
changed until the ENTER key is pressed.
For example, to change the chilled water setpoint:
1. Press MENU key to go to the MENU mode (see Figure 9, Display (in MENU mode) and
Keypad Layout
2. Press SET (the UP Key) to go to the setpoint menus.
3. Press UNIT SPs (the Right key) to go to setpoints associated with unit operation.
4. Press the DOWN key to scroll down through the setpoint menus to the third menu which
contains Evap LWT=XX.X
°
F.
5. Press the ENTER key to move the cursor down from the top line to the second line in
order to make the change.
6. Use the ARROW keys (now in the edit mode as shown above) to change the setting.
7. When the desired value is achieved, press ENTER to enter it and also move the cursor
down.
At this point, the following actions can be taken:
1. Change another setpoint in this menu by scrolling to it with the ENTER key
2. Using the ENTER key, scroll to the first line in the menu. From there the ARROW keys
can be used to scroll to different menus.
Security
All setpoints on the controller are protected using passwords. Two four-digit passwords
provide Operator and Manager levels of access to changeable parameters. Operator level is
the lowest level of access. Manager level is the next level, and can access Operator level
parameters in addition to Manager level parameters. The password can only be entered at
the unit controller (CP1).
Operator password: 0100
Manager password: 8745
Entering Passwords
Passwords can be entered using the ENTER PASSWORD screen on the unit controller
(CP1), which is the last screen in the Unit SPs column. The password is entered by pressing
the ENTER key, scrolling to the correct value with the UP and DOWN arrow keys, and
pressing ENTER again. The entered password is not shown after the enter key is pressed.
Once the correct password has been entered, the ENTER PASSWORD screen indicates
which password is active (None, Operator, or Manager). If the wrong password is entered, a
message will temporarily appear stating this. If no valid password is active the active
password level displays “None”.
Entering an incorrect password while a password is active will render the active password
inactive. Entering a valid password that is not the same as the active password will result in
the active password level being changed to reflect the new password level.