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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Honeywell W7750A2005 Industrial Control System

So, if the outdoor air is suitable for cooling use, the mechanical cooling either staged or modulating is held off until the economizer has reached its fully open position. Only one router is allowed with each Excel 10 Zone Manager, and each network segment can have a maximum of one repeater.

The WA Controller can drive Series 60 Floating 25 Control to modulate cooling valves, heating valves and economizers. Using the transformer-coupled communications interface offers a much higher degree of common-mode noise rejection while ensuring dc isolation.

During power up, an application restart, or return to on-line from off-line, the Excel 10 sets InUse to to indicate to the management node that it has returned to on-line. If the input is open, the bit is one or TRUE. Also, transducer devices are available from third party vendors to convert PWM outputs to a voltage or current signal if desired.

W7750a 2005 Honeywell Excel 10 Constant Volume Air Handling Unit

Attaching two or more wires at terminal blocks. DirtyFilter is set to 1. The indoor air quality is acceptable. Because this action saves energy, the dampers are often referred to as economizer dampers. For digital points, hhoneywell valid states and the corresponding enumerated values are shown.

7w750a2005 contents of the DeviceName is maintained by a management node. The above mention sources of override must be either Not Q7750a2005 or Off before the Override pushbutton affects the manual override status in the Network Wins scheme. This information is required during installation to ensure that the proper number and type of wires are pulled to the wall modules, and the building operators are informed about where they honeywwell plug in to the LONWORKS Bus network with a portable operator terminal see Fig.


When poor air quality is detected, the economizer minimum position is set to nciAux1SetPts. If no valid room temperature value is available to the W Controller, the temperature control algorithm in the controller is disabled, causing the heating, cooling, and economizer control outputs to be turned off.

The WA,B,C Controllers can be configured to control a wide variety of possible equipment arrangements. 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 type. Differential Enthalpy, Either Sensed or Calculated— the difference between outdoor enthalpy and return air enthalpy determines whether outdoor air or return air is more suitable to augment mechanical cooling.

TA through D Wall Modules. If there is no outdoor air temperature sensor available, then MinHtRamp is used as the recovery rate.

When HeatCoolMode is 0, then cooling loads are controlled. The WB,C Models are intended for more complex applications. If the node is controlling a heat pump, compressor stages are turned on for both heating or cooling. Free Topology Transceiver FTT network technology is insensitive to polarity, simplifying installation. As the discharge temperature warms up, the economizer modulates open until the minimum position setting is reached. ControlUsesRtnAirTemp is 1, then the return temperature sensor is selected.

Decreasing the Proportional Gain amplifies the effect of the error; that is, for a given error, a small Proportional Gain causes a higher output signal value. Fan, modulating heating and modulating cooling. If the economizer function is configured by Config. If there is any question about wire compatibility, use Honeywell-approved cables see Step 5 Order Equipment section.

This mode can also be entered via a network command ManualOcc set to Unoccupied.


OccTimeClock shows the state of the physical time clock input via nvoIO. Relative Humidity Percentage Sensor Voltage 10 5.

The smaller the Control Band, the more responsive the control output. The WC Model also has three analog outputs available on terminals 16, 17 and W7750a0205 all modes all digital and analog physical inputs are periodically read, the diagnostic output network variables can be polled, the input network variables are received, and the output network variables are sent periodically.

Modulating heat with pneumatic valve actuator. SenOcc indicates the current state of the sensed occupancy and is calculated from nviSensorOcc and the local honeywdll sensor via nvoIO.

When enthalpy sensors are configured, they are used for comparing enthalpy. If the resistor is located far away from the driven device, it is possible that noise will be added onto the 2-toV signal to ground line. Typical WB Controller with staged heating and cooling wiring diagram.

Honeywell WA | Controllers |

Ventilation openings were designed into the cover to allow proper heat dissipation regardless of the mounting orientation. Be sure to always follow Local Electrical Codes. DIN rail is available through hobeywell suppliers. These outputs only respond to signals sent over the network, and are not controlled by the W internal control algorithms.

The DestSchedOcc has three possible states, occupied, unoccupied or standby.

Wa Honeywell Excel 10 Constant Volume Air Handling Unit | eBay

Use the lower edge of the shaded zone in Honeyaell. S Schematic—These points appear in E-Vision monitor mode graphics. The user has the option to disable the minimum run timer for heating DisMinHtTimer. Controller configurations are not necessarily limited to three devices per transformer.