Honeywell Home AQUATROL AQ252, Owner'S Manual

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OWNER’S GUIDE
69-1990-03
AQUATROL Zone Synchronizing
Injection/Mixing Boiler Reset Controls
AQ252
APPLICATION
The AQ252 series of AQUATROL® 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.
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.
CONTENTS
Application ..................................................................................... 1
Familiarization with Control ................................................... 2
User Interface .............................................................................. 2
LCD Display Panel Layout ....................................................... 3
Programming Instructions ...................................................... 4
Troubleshooting .......................................................................... 6
System Status and Error Codes ............................................ 6
User Menu Structure ................................................................. 8
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:
(________) __________________________________________________________