Honeywell AQ255 Series Product Data

Contents

Honeywell AQ255 Series Product Data Manual pdf 3 page image

AQ255 AND AQ257 SERIES EXPANSION ZONING PANELS3 69-1981—06When Installing this Product…1. Read these instructions carefully. Failure to followthem could damage the product or cause ahazardous condition.2. Check the ratings given in the instructions and onthe product to make sure the product is suitable forthe application.3. Installers must be trained, experienced, and licensedservice technicians.4. Follow local codes for installation and application.5. After installation is complete, check out the productoperation as printed in these instructions.WARNINGRisk of electrical shock.Can cause severe injury, property damage or death.Disconnect power supply before installation and beforeservicing.Check That You Have All theNecessary Equipment For aSuccessful Installation• AQ2000 Series components— AQ2000 Series Control Panel – already installed— AQ Expansion Zoning Panel(s)— Digital Thermostats (one for every space heating zonebeing controlled)• Low voltage thermostat wire• Zoning equipment (zone valves or pumps)Read All Instructions CarefullyBefore ProceedingThe AQ2000 Series Control Panels are a part of a totally newfamily of hydronic controls. And although they, and otherAQ2000 system components, are very easy to install andoperate, they are different than other hydronic controls that youhave previously installed. Take a moment to read through thisdocument before beginning the installation. Failure to followthese instructions could damage the product or cause ahazardous condition.Familiarize Yourself With the AQ255 /AQ257 Expansion Zoning PanelRefer to Fig. 1 on page 3. In general, the top terminals of allAQ255 / AQ257 Expansion Zoning Panels carry low voltage(24Vac) power and the bottom terminals carry either linevoltage (120 Vac) power for the AQ25542B and AQ25582Bmodels, or low voltage (24 Vac) power for the AQ25742B andAQ25744B models. The two exceptions to this are:1. AQ25744B Expansion Zoning Panel for use with zonevalves with end switches.2. AQ25742B Expansion Zoning Panel when used with lowvoltage zone valves without end switches.For these the two exceptions, the bottom terminals of theAQ10X38 Transformer carry line voltage (120 Vac), but thebottom terminals of the Zoning Module will carry low voltage(24 Vac) power.Fig. 1. AQ255 Expansion Zoning Panel Layout (AQ25582B shown).Zone 1 Zone 2 Zone 3 Zone 4 Zone 1 Zone 2 Zone 3 Zone 4LOW VOLTAGE(24 V)LINE VOLTAGE(120 V)ZONING MODULE ZONING MODULEM27831A