McQuay WGS160AW User Manual

OM WGS-5 WGS 130A to 190A 71
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 unit controller, as well as the circuit controllers, are protected using
passwords. Two four-digit passwords provide OPERATOR and MANAGER levels of
access to changeable parameters.
Entering Passwords
Passwords can be entered using the ENTER PASSWORD screen on the unit controller,
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 longer a key is held down, the faster it will increment. The entered
password is not shown after the enter key is pressed. The operator password is 100.
Once the correct password has been entered, the ENTER PASSWORD screen indicates
which password is active (none, operator, technician, or manager). If the wrong password is
entered, a temporary message will appear so stating. If no valid password is active, the
active password level displays “none”.
Entering an incorrect password while a password is active will render that 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.
Editing Setpoints
After a valid password has been entered at the unit controller, setpoints on the circuit
controllers and the unit controller can be changed. If the operator attempts to edit a setpoint
for which the necessary password level is not active, no action will be taken.
Once a password has been entered, it remains valid for 60 minutes after the last key-press
on the unit controller.
Clearing Alarms
Alarms are only shown on the unit controller and are cleared at the unit controller. No
password is required.
To clear an alarm, go to the unit controller Alarm Log. Scroll down to the last alarm listed.
The screen will note “No More Alarms”. Press and hold ENTER for several seconds until
the circuit controllers get a clear signal. If there are no active alarms, the red Alarm light
will be off and alarms status will clear from the unit and circuit controllers.

McQuay WGS160AW Specifications

General

Brand	McQuay
Model	WGS160AW
Category	Chiller
Language	English