Instruction/ maintenance manual of the product AQ251 Honeywell
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USER OPERATION AND MAINTENANCE 69-1979-04 AQUA TROL Zone Synchronizing Boiler Reset Controls AQ251 APPLICATION The AQ251 series of AQUA TROL® Boiler Reset Controls provides simplified, energ y-efficient outdoor temperature compensated control of sin gle-temperature, resid ential hydronic heating systems.
AQUA TROL ZONE SYNCHRONIZIN G BOILER RESET CONTROLS 69-1979—04 2 T able 1. AQ251 Models AQ251 Approvals an d St andards: Canadian S tandards Association: Certified, File No.
AQUA TROL ZONE SYNCHRONIZI NG BOILER RESET CONTROLS 3 69-1979—04 LCD Display Panel Layout The LCD on the AQ251 Control Panel is used to: — Monitor system status and performance. — Select and/or modify control settings for the hydronic system. — Diagnose and troubleshoot system probl ems.
AQUA TROL ZONE SYNCHRONIZIN G BOILER RESET CONTROLS 69-1979—04 4 Programming Instructions Program the AQ251 by using the keypad and LCD display to select parameters from the User Menu. Refer to Fig. 1 on page 2 for an illustration of the LCD screen and keypad.
AQUA TROL ZONE SYNCHRONIZI NG BOILER RESET CONTROLS 5 69-1979—04 changes temporarily , requi ring the temperature to be at a comfort level 24 hours/day . UNOCC: In UNOCC mod e, the AQ251 holds the temperature of UNOCCUPIED programs (LEA VE and SLEEP).
AQUA TROL ZONE SYNCHRONIZIN G BOILER RESET CONTROLS 69-1979—04 6 T ROUBLESHOOTING Power Disruption The AQ251’s system and ther mostat (zone settings) parameters are stored in non-volatile memory and are updated as they change. When a power disruption or lo ss of power occurs, the system configuration is retained in memory .
AQUA TROL ZONE SYNCHRONIZI NG BOILER RESET CONTROLS 7 69-1979—04 When a new AQ2000 component is conne cted on the AQUA TROL network, its settings are communicated to the AQ251's Boiler Control Module (AQ1520 M0) within 10 seconds of being connected.
AQUA TROL ZONE SYNCHRONIZIN G BOILER RESET CONTROLS Automation and Co ntrol Solutions Honeywell Internationa l Inc. Honeywell Limited-Hon eywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9 customer.
An important point after buying a device Honeywell AQ251 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Honeywell AQ251 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Honeywell AQ251 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Honeywell AQ251 you will learn all the available features of the product, as well as information on its operation. The information that you get Honeywell AQ251 will certainly help you make a decision on the purchase.
If you already are a holder of Honeywell AQ251, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Honeywell AQ251.
However, one of the most important roles played by the user manual is to help in solving problems with Honeywell AQ251. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Honeywell AQ251 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
