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AQUATROL ZONE SYNCHRONIZING INJECTION/MIXING BOILER RESET CONTROLS

3

69-1990—03

LCD Display Panel Layout

The LCD on the AQ252 Control Panel is used to:

Monitor system status and performance.

Select and/or modify control settings for the 
hydronic system.

Diagnose and troubleshoot system problems.

The layout of the display is logical and simple to navigate. 
The information displays so that you can see at a glance 
the system’s operating temperatures, as well as the status 
of the system equipment, such as a call for heat, DHW 
pump ON, Boiler T-T terminals energized, etc. Fig. 1 on 
page 2 illustrates the l
ayout and features of the LCD 
display panel and keypad.

LCD Display Navigation

This section describes how the keypad is used to navigate 
the LCD display and menus.

• The LCD displays up to three lines of text at a time. For 

menus with more than three lines, use the up and down 
buttons (

or v) to scroll through the menu options.

• As the menu is scrolled up or down, the indicator arrow 

(←)

 shows which menu item is active.

• If the active menu item is part of a list of predefined 

options (e.g., Day of the Week) press the – or + button to 
scroll through the available options until the preferred 
option is displayed. The option is automatically saved 
when the indicator arrow is scrolled away from the 
value being edited. 

• If the active menu item requires you to define a value 

(e.g., a setpoint), use the – or + button to decrease or 
increase the value until the desired value is displayed. 
The selection will be saved when the indicator arrow is 
scrolled up or down.

NOTES:

1.

When setting times for the setback schedule, 
you must use the – or + button to change the 
time.

2.

The OK button, when pressed, defaults the 
time setting to “--:--” (midnight).

• If the active menu item leads to a further sub-menu, 

pressing the OK button displays the sub-menu options 
on the LCD. Scroll through this sub-menu to position 
the indicator arrow 

(←)

 beside the desired menu item to 

input or modify. Choose one of the options provided or 
input the desired value for the menu item. When 
satisfied, scroll to another item and your selection will 
be saved.

• To define or modify another item within the same menu, 

scroll the up and down buttons (

or v) until the 

indicator arrow

 (←)

 is beside the desired option. Use the 

– or + buttons to set the value for that item.

• To move back (up) one level within a menu, press the 

Menu button. 

• To return to the Home Page display, press the Home 

button. 

NOTE:

The AQ252 automatically returns to the Home 
Page display after 60 minutes of inactivity on the 
keypad.

HOME PAGE DISPLAY

The Home Page is the default view displayed on the 
AQ252 Control Panel's LCD screen. 

There are two Home Page views - Simple and Detail.
• Simple view shows 3 lines of text and is a brief 

description of the system operation. 

• Detail view includes the same 3 lines plus 10 lines of 

additional information. Detail view is the factory 
default.

The choice of the Simple or Detail Home Page view is 
made from the USER MENU > PREFERENCES/TIME 
menu option.

The Home Page display information for the Simple and 
Detail views is illustrated in Fig. 2.

Fig. 2. Home Page displays (Simple and Detail).

M27699

WEDNESDAY    9:30A

PROGRAM:     LEAVE  

 RETRN SLEEP WAKE OCC UNOCC

OUTDOOR:        -5    

TARGET:        180  

 WWSD -

 

-

BOILER:        180

RETURN:        160

SECONDARY: 100

SEC TARGET:    100  

 WWSD -

 

DHW:           100

ZONE COUNT:     31

WEDNESDAY    9:30A

PROGRAM:     LEAVE

OUTDOOR:        -5            

Menu

Home

KEYPAD

HOME PAGE (SIMPLE)

HOME PAGE (DETAIL)

LCD DISPLAY

Summary of Contents for AQUATROL AQ252

Page 1: ...icians should service this Control Panel The front cover of the AQ251 Control Panel should not be removed as this will expose the user to potentially dangerous line voltage 120V electricity Congratula...

Page 2: ...alue will decrease increase by pressing these buttons When holding the or button for more than a second the values automatically decrease increase at a faster pace similar to setting the time on a dig...

Page 3: ...dule you must use the or button to change the time 2 The OK button when pressed defaults the time setting to midnight If the active menu item leads to a further sub menu pressing the OK button display...

Page 4: ...n this sub menu are The temperature scale for the display Fahrenheit or Celsius for both the AQ252 control s LCD and the zone thermostats The time display in 12 hour e g 7 00 PM or 24 hour format e g...

Page 5: ...AKE program time for all days the LEAVE program time for all days etc When all four programs have been set select the COPY TO ALL DAYS option This displays the prompt COPY TO ALL DAYS ARE YOU SURE Sel...

Page 6: ...OFF time has not yet elapsed A C MIN ON TIME n a The A C compressor is active and the minimum ON time has not yet elapsed AUX IN EM SHUT n a Auxiliary Input s Emergency Shut Down is active BOILER EM S...

Page 7: ...the return sensor is at or below the minimum return water temperature NO DHW PROBE n a No DHW sensor connected or it is defective NO LINE VOLTAGE n a No line voltage has been detected on the N and L t...

Page 8: ...RETURN PROBE NO SECOND PROBE NO SUPPLY PROBE SHORT CYCLE PROT VALVE INIT WATER READY WWSD ACTIVE SYSTEM STATUS 1 ZONE A 1 ROOM TEMP FLOOR TEMP SETPOINT 70 FLOOR SETPT 70 HEAT COOL STATUS SETBACK 7 SET...

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