C-Bus Honeywell proprietary Control Bus for communications between Excel 10 W Controllers: WA Constant Volume AHU Controller. Product – Brand: Honeywell; Product Number: WA; SINGLE ZONE AHU WITH STAGED HEAT/COOL OR HEAT PUMP. Category: HVAC. Product Identifiers. GTIN. BRAND. Honeywell. MPN. WA UPC. eBay Product ID (ePID).

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Contact Honeywell for information about Controllers and Wall Modules with no logo. Supports two types of economizer control: However, if the nearest ideal earth ground is inaccessible, consider an alternate source for earth ground.

DlcShed indicates the state of nviDlcShed. If the local sensor is honeywel, by Select, nviOdEnth is periodically sent on the network.

W7750A2005 Excel10 CVAHU

Capable of stand-alone operation and has enhanced features available when using the E-Bus network communications. If nviDlcShed fails to be received periodically or nviDlcShed becomes 0, then the setpoint is ramped back to the original setpoint over a 30 minute interval.

Additionally, two of the W digital outputs are available for control program use. The advantage of using the router is that it segregates traffic to a segment while when using the repeater, all w7750a205 is repeated on each segment. This value is used to control the adaptive recovery ramp rate during the HEAT recovery period. This input is used to cause the economizer to open to a predetermined position when poor indoor air quality is detected.

Whenever a new software version or upgrade is M issued, this is reflected in nroPgmVer which typically is read by a network management node to identify the node hineywell.

When a purchased transformer meets the NEMA standard DC, the transformer voltage-regulating ability can be considered reliable. Tables 3 and 4 provide an overview of the Excel 10 W configuration options.


The information contained in these network variables are typically used w775a02005 display the node status on an operator terminal, used in a trend log, or used in a control process. Sensor, Setpoint adjust and Bypass.

If ProofAirFlow shows that the fan is not running for FanFailTime consecutive seconds, then the control is shut down for the minimum off time. All Excel 10 points, mappable and calibration, configuration and internal data sharing points, can be viewed and changed, as allowed, via Direct Access DA mode in the XBS subsystem menu or via XI Offset and Absolute Middle.

Valid enumerated values are: The WA,B,C can be mounted in any orientation. Contacts closed means that coil freeze condition is sensed.

It can also be the direction a7750a2005 space temperature is going, either toward or away from the setpoint, and its speed—quickly or slowly.

When floating control is used, the full-stroke motor drive time of the actuator must be entered into the configuration parameter CoolMtrSpd for coolingHeatMtrSpd for heatingyoneywell EconMtrSpd for the economizer dampers. False 0 it is not freezing or True 1 it is freezing.

Honeywell WA User’s Manual |

This Setpoint is used only when there is no wall module setpoint pot configured. The compared difference determines whether outdoor air is hkneywell for use to augment mechanical cooling. If the minimum run timer is disabled, the interstage time delay is fixed at 20 seconds.

Because all transformer output voltage levels depend on the size of the connected load, a larger transformer outputs a higher voltage than a smaller one for a given load.

The controllers mount with two screws see Fig. When the bypass state has been activated, the bypass timer is set to Honyewell default of minutes. Setpoint ramping parameters with ramp rate calculation. Connections to the wall module terminals 2 through 6 and the communications terminals 14 and 15 are made at terminal blocks. WB,C wiring diagram with 4 to 20 mA enthalpy sensors and digital inputs. Outdoor Enthalpy, Type B—when the outdoor enthalpy meets the H type B requirements, the outdoor air is suitable to augment honegwell.


Then, if the discharge temperature continues to be above setpoint, the mechanical cooling is allowed to come on. The size of the ZEB is found by taking the difference between the software heating and cooling occupied setpoints; therefore, for Absolute Middle, w7750a20005 actual setpoints are found as follows: If there is no outdoor air temperature sensor available, then ubMinHtRamp is used as the recovery rate.

Be careful not to set the Control Band too low and cause large over or under shoots hunting. When planning the system layout, consider potential honeywelp possibilities to allow for future growth.

Use noble metal such as gold or silveror pimpled or sealed contacts to assure consistent, long-term operation. The range of VoltageOffsetCal[1] is between -1 and 1 volt. Setpoint ramping parameters with setpoint calculation The various other modes are due to normal operation as well as s7750a2005 and network commands.

Honeywell W7750A2005 Excel 10 Cvahu

The timing is done by the bypass timer honeywwll this node. Page 93 Table W systems in commercial buildings typically incorporate a packaged air handler system that delivers a constant volume of air at preconditioned temperatures to the zone being served. The states have the following meanings: If not, adjust or replace the Air Flow switch to get it working.

The local sensor and nviSensorOcc are ORed together. The economizer enable function, which decides when to honeywdll outdoor air to be used for free cooling, can be configured to 7 one of ten strategies based on the inputs.