Honeywell AQ255 Series Product Data

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Honeywell AQ255 Series Product Data Manual pdf 6 page image

AQ255 AND AQ257 SERIES EXPANSION ZONING PANELS69-1981—06 6Although for many installations, these factory default DIPswitch settings will be suitable, Honeywell recommends thatthey be reviewed and changed, as necessary, to get optimalperformance of the hydronic system controlled by the AQ2000Series products.Expansion Zoning Module DIP SwitchLocationThe AQ15540B (pump Zoning Module) and AQ15740B (valveswith end switches Zoning Module) both have DIP switches in 8-switch banks and are concealed behind snap-on covers, asshown in Fig. 4. A chart of the different settings for each DIPswitch is affixed to the inside of the DIP switch covers.More detailed explanations for these DIP switch settings,including the pre-set factory defaults for each, are shown inTable 2 on page 7.Fig. 4. Location of concealed DIP switches for AQ155 /AQ157 Expansion Zoning Modules.Expansion Zoning Module DIP SwitchSettingsRefer to Table 2 on page 7 and check all DIP switch settings. Ifnecessary, change the switch settings to suit the desiredoperation of the hydronic installation.1. DIP switches #1-4 define the identity (or address) ofeach zone on the AQ network. This is how the ControlModule knows that, for example, the zone labeledZone 1 on the first Zoning Module is different than thezone labeled Zone 1 on another Zoning Module.NOTE: If more than one Zoning Module is connected toan AQ2000 Series Control Panel, DIP switches #1-4 must be set to uniquely identify each Moduleand its zones. If any of these four DIP switches isset to the right hand (ON) position for two or morezoning modules - for example, if two zoning mod-ules both have their DIP switch #1 in the ON posi-tion - the AQ2000 Series control will operateunpredictably.a. For the first Zoning Module connected to an AQ2000Series Control Module (this first Zoning Module isoften included as a component of the main AQ2000Series Control panel), make sure that DIP switch #1is set to the right hand position (ON) and DIPswitches #2- 4 are set to the left (OFF).b. For the second Zoning Module connected to anAQ2000 Series Control Module, make sure that DIPswitch #2 is set to the right hand position (ON) andDIP switches #1, 3, and 4 are set to the left.c. For the third Zoning Module connected to an AQ2000Series Control Module, make sure that DIP switch #3is set to the right hand position (ON) and DIPswitches #1, 2, and 4 are set to the left.d. For the fourth Zoning Module connected to anAQ2000 Series Control Module, make sure that DIPswitch #4 is set to the right hand position (ON) andDIP switches #1, 2, and 3 are set to the left.2. Review the settings for DIP switches 5 through 8 of eachZoning Module connected to an AQ2000 Series ControlPanel to ensure they are correct before system start-up.a. DIP Switch 5 enables or disables Zone Synchroniza-tion:• The factory setting disables Zone Synchronization,which is an energy saving feature of the AQ2000panels. Zone Synchronization coordinates zonedemands to start at the same time when the boilercycle begins. The AQ2000 functions as activatingvalves. The valve logic induces a delay beforeactivating the boiler pump even when zone pumpsare used. When Zone Synchronization is notselected, the zone demands are served wheneverthey call for heat.•The Zone Synchronization feature replaces the pump/valve selection of previous AQ2000 versions.b. Dip Switch 8 functionality:•The factory setting enables 1-stage per zonedthermostat. The zoning module operates as four1-stage zones.•When using a 2-stage thermostat, set DIP switch 8 to2-Stg. The 2-stage selection uses TH1 and TH2inputs for 2-stage thermostat control. For theselected zone, TH1 is the first stage input from thethermostat and TH2 is the second stage input.Inputs TH3 and TH4 operate in same manner. The2-stage selection reduces the zoning module to a 2zone module from a 4 zone module.•When using digital 2-stage thermostats (non-AQ1000thermostats), the system set-up process changesslightly. During system set-up, create an artificialdemand on the zoning module by increasing the setpoint on the thermostat. The artificial demand isrequired during the PRI/SEC setup menu to selectthe primary and secondary loop for each zone andstage.3. Replace the DIP switch cover of each Expansion ZoningPanel.•If DIP switches were set for a zoning module includedin the main AQ2000 Control Panel, be sure toreplace the DIP switch cover on the Zoning Modulebefore replacing the main Control Panel’s frontcover.4. The Expansion Zoning Panel is now ready for Test andCheckout. Continue with 5, “Test and Check Out theInstallation” on page 7.M23731