Honeywell AQUATROL AQ25242B User Operation And Maintenance
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Honeywell AQUATROL AQ25242B User Operation And Maintenance

Honeywell AQUATROL AQ25242B User Operation And Maintenance

Zone synchronizing universal injection/mixing boiler reset controls
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AQUATROL Zone Synchronizing Universal
Injection/Mixing Boiler Reset Controls
AQ252
APPLICATION
The AQ252 series of AQUATROL® Universal Injection/Mixing
Boiler Reset Controls provides simplified, energy-efficient
outdoor temperature compensated control of a high-
temperature boiler loop and a lower temperature mixed loop in
residential hydronic heating systems. The AQ252 easily
converts a single-zone heating system into a room-by-room
comfort control system, or upgrades a basic, relay-logic
zoning system to intelligent Zone of Greatest Demand control,
with outdoor reset for increased energy efficiency and with
reduced boiler cycling. The boiler controls of the AQ252 can
ensure ample supply of hot water for both space heating and
priority generation of domestic hot water for bathing, dishes
and laundry.
When AQ1000 communicating thermostats are used with the
AQ252 Zoning Modules, they can use the same wiring as
existing thermostats. Night setback operation can be
programmed from the AQ252 panel.
This AQUATROL AQ252 control panel was installed by a trained hydronic heating contractor.
To service this product, or for any questions relating to its installation, please contact:
Installing contractor: ___________________________________________________________________
Address: _____________________________________________________________________________
Phone: (________) __________________________________________________________
USER OPERATION AND MAINTENANCE
WARNING
Risk of electrical shock.
Can cause severe injury, property damage or
death.
Only trained, experienced, licensed service
technicians 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.
Congratulations!
The AQUATROL AQ252 installed on your heating system is
the most powerful, yet user-friendly hydronic heating control
system available on the market for residential and light
commercial installations.
This document contains all the information you need to
program the comfort settings of the AQ252 and to customize
its operation for your home or business. For detailed
information on the operation of this control, please consult the
trained hydronic heating professional that installed the AQ252
control.
Application ........................................................................
Familiarization with Control ..............................................
User Interface ..................................................................
LCD Display Panel Layout ................................................
Programming Instructions .................................................
Troubleshooting ................................................................
System Status and Error Codes .......................................
User Menu Structure .........................................................
CONTENTS
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69-1990-02

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Summary of Contents for Honeywell AQUATROL AQ25242B

  • Page 1 AQUATROL Zone Synchronizing Universal Injection/Mixing Boiler Reset Controls AQ252 USER OPERATION AND MAINTENANCE WARNING Risk of electrical shock. Can cause severe injury, property damage or death. Only trained, experienced, licensed service technicians 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.

  • Page 2: User Interface

    AQUATROL ZONE SYNCHRONIZING UNIVERSAL INJECTION/MIXING BOILER RESET CONTROLS Table 1. AQ252 Models Model Function Zones Zone Control AQ25242B Universal Injection/Mixing Selectable DHW priority, with 2 – 16, Line voltage circulators or 2-wire zone Boiler Reset Control Panel optional priority override in sets of 4 valves with integrated zoning...
  • Page 3 AQUATROL ZONE SYNCHRONIZING UNIVERSAL INJECTION/MIXING BOILER RESET CONTROLS LCD Display Panel Layout • If the active menu item leads to a further sub-menu, pressing the OK button displays the sub-menu options on The LCD on the AQ252 Control Panel is used to: the LCD.

  • Page 4: Programming Instructions

    AQUATROL ZONE SYNCHRONIZING UNIVERSAL INJECTION/MIXING BOILER RESET CONTROLS Programming Instructions — The time display in 12 hour (e.g., 7:00 PM) or 24 hour format (e.g., 19:00). Program the AQ252 by using the keypad and LCD display to — Date and time of day – allows building owner to reset select parameters from the User Menu.
  • Page 5 AQUATROL ZONE SYNCHRONIZING UNIVERSAL INJECTION/MIXING BOILER RESET CONTROLS changes temporarily, requiring the 2. Programming all days at the same time: temperature to be at a comfort level 24 • Select EDIT ALL DAYS from the Program Settings hours/day. sub-menu. UNOCC: In UNOCC mode, the AQ252 holds the •...

  • Page 6: Troubleshooting

    AQUATROL ZONE SYNCHRONIZING UNIVERSAL INJECTION/MIXING BOILER RESET CONTROLS TROUBLESHOOTING Upon restart, the AQ252 displays its clock settings as: YEAR = 2008, MONTH = JAN, DATE = 1. The message PLS SET DAY/TIME displays. This displayed message continues until Power Disruption the DATE and TIME OF DAY are updated.
  • Page 7 AQUATROL ZONE SYNCHRONIZING UNIVERSAL INJECTION/MIXING BOILER RESET CONTROLS Table 2. LCD Status Notices and Error Messages. (Continued) LCD Display Parameter Meaning MIN. RETURN PROT The temperature measured by the return sensor is at or below the minimum return water temperature. NO DHW PROBE No DHW sensor connected or it is defective.

  • Page 8: User Menu Structure

    FACTORY DEFAULT TIMES FOR MON THROUGH FRI. M27700 FACTORY DEFAULT TIMES FOR SAT AND SUN. Fig. 3. User Menu Structure. AQUATROL® is a registered trademark of Honeywell International Inc. Automation and Control Solutions Honeywell International Inc. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North...

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