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EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER

95-7520—02

10

NOTE: The node can be reset by switching the node to MANUAL and then switching to the normal operating mode 

(using DestManMode).

Also, the Excel 10 network variables, 

AlarmLogX

, where 

X

 is 1 through 5, that store the last five alarms to occur in the 

controller, are available. These points can be viewed through XBS, XI584 or E-Vision.

Table 1. Excel 10 Alarms.

Name of alarm or error bit

Alarm type 

number

NO_ALARM

0

No alarms presently detected.

INPUT_NV_FAILURE

1

One or more NV inputs have failed while receiving an update within their 

specified FAILURE_DETECT_TIME.

NODE_DISABLED

2

The control algorithm stopped because the controller is in DISABLED_MODE, 

or FACTORY_TEST mode. The control is shut down and disabled until power is 

cycled or the node is reset. See NOTE 1 below.

SENSOR_FAILURE

3

One or more sensors have failed.

FROST_PROTECTION_ALARM 4

The space temperature is below the frost alarm limit 42.8

°

F (6

°

C) when the 

mode is FREEZE_PROTECT. The alarm condition remains until the 

temperature exceeds the alarm limit plus hysteresis.

INVALID_SET_POINT

5

One of the Setpoints is not in the valid range.

LOSS_OF_AIR_FLOW

6

The Fan Status DI indicates that there is no air flow when the node is 

commanding the fan to run. The control is shut down and disabled until power is 

cycled or the node is reset. The alarm is not issued until FanFailTime seconds 

have elapsed since the loss-of-flow condition was first reported.

DIRTY_FILTER

7

The pressure drop across the filter exceeds the limit and the filter requires 

maintenance. The control runs normally.

SMOKE_ALARM

8

The smoke detector has detected smoke and the node has entered an 

emergency state.

IAQ_OVERRIDE

9

The indoor air quality sensor has detected that the indoor air quality is poorer 

than the desired standard and additional outdoor air is being brought into the 

conditioned space.

LOW_LIM_ECON_CLOSE

10

The economizer has to close beyond the minimum position to prevent the 

discharge air temperature from going below the discharge temperature low 

limit.

DRIP_PAN_FULL

11

Drip pan maintenance is required. Cooling control is disabled. Fan continues to 

run.

FREEZE_STAT

12

Very Cold Temperature detected inside the Unit Ventilator Cabinet. Control 

closes OA Damper, and open heat valve.

OAQ_ALARM

13

The configured outdoor air quality sensor has detected CO or CO

2

 levels that 

exceeds OaQStPt (plus 30 ppm hysteresis). When there is an OAQ_ALARM, 

the economizer damper is closed.

RETURN_TO_NORMAL

128

Return to no alarm after being in an alarm condition. This code is added 

numerically to another alarm code to indicate that the alarm condition has 

returned to normal.

ALARM_NOTIFY_DISABLED

255

The alarm reporting was turned off by the nviManualMode. No more alarms are 

reported until nviManualMode turns on alarm reporting or upon application 

restart.

Summary of Contents for EXCEL 10 W7753A

Page 1: ...7753A Controller communicates via the 78 kilobaud Echelon LonWorks E Bus Network Allowable input output connections consist of wall module points plus two additional resistive sensor inputs two voltage current inputs four digital inputs and eight digital Triac outputs For the W7753A any hardware driven by the Triac outputs must have a minimum current draw when energized of 25 mA and a maximum curr...

Page 2: ...lastic cover Use the screws appropriate for the mounting surface The W7753A can be mounted in any orientation Ventilation openings were designed into the cover to allow proper heat dissipation regardless of the mounting orientation The W7753A can also be mounted using DIN rail obtain locally If using DIN rail also purchase from Augat Inc part number 2TK2D DIN rail adapter two each See Fig 3 Fig 2 ...

Page 3: ...II restrictions U S only transformers must not be larger than 100 VA A transformer that meets CE mark requirements and that meets the Low Voltage Directive LVD requirements must be used in Europe for all installations of this product More than one W7753A Controller can be powered by a single transformer Fig 4 shows power wiring details for a single controller and Fig 5 depicts multiple controllers...

Page 4: ...o pair can be used Unswitched 24 Vac power wiring can be run in the same conduit as the E Bus cable Do not bundle output wires with sensor digital input or communications E Bus wires Do not use different wire types or gauges on the same E Bus segment The step change in line impedance characteristics would cause unpre dictable reflections on the E Bus When using dif ferent types is unavoidable use ...

Page 5: ... Wiring Details The W7753A Controller has the terminal arrangements shown in Fig 9 through 14 Connection for operator access to the E Bus is provided by plugging the Serial LonTalk Adapter SLTA connector into the E Bus jack NOTE If an Excel 10 Controller or Zone Manager is not connected to a good earth ground the controller internal transient protection circuitry is compromised and the function of...

Page 6: ...ET 2 7 8 5 6 9 10 LED SET PT FAN BYPASS 1 2 3 4 5 6 7 8 E BUS 24 VAC W7753A UNIT VENTILATOR CONTROLLER 1 2 1 2 3 3 3 EARTH GROUND WIRE LENGTH SHOULD BE HELD TO A MINIMUM USE THE HEAVIEST GAUGE WIRE AVAILABLE UP TO 14 AWG 2 O MM2 WITH A MINIMUM OF 18 AWG 1 O MM2 FOR EARTH GROUND WIRE TO ASSURE PROPER ELECTRICAL CONTACT WIRES MUST BE TWISTED TOGETHER BEFORE INSERTION INTO THE TERMINAL BLOCK CONTACTS...

Page 7: ...1 OUT 7 OUT 6 OUT 5 OUT 4 OUT 8 OUT 1 OUT 3 OUT 2 DI 2 DI 4 DI 1 DI 3 GROUND PNEUMATIC VALVE M12693 GROUND M B M 1 2 3 4 5 6 7 8 E BUS 24 VAC W7753A UNIT VENTILATOR CONTROLLER 1 2 E BUS E GND GND SNSR SETPT LED BYPASS GND GND 9 10 11 12 14 J3 15 31 30 29 28 27 26 25 24 23 22 21 20 24 VAC COM E BUS JACK 22 VDC OUT 19 18 17 16 AI 1 OHM AI 2 OHM AI 4 V mA OUT 7 OUT 6 OUT 5 OUT 4 OUT 8 OUT 1 OUT 3 OUT...

Page 8: ...nd ordinances or as specified on installation wiring diagrams Fig 14 Typical 2 to 10 Volt DC humidity sensor to W7753A For note 2 refer to Fig 8 1 2 3 4 5 6 7 8 E BUS 24 VAC 1 2 E BUS E GND GND SNSR SETPT LED BYPASS GND GND 9 10 11 12 14 J3 15 31 30 29 28 27 26 25 24 23 22 21 20 24 VAC COM E BUS JACK 22 VDC OUT 19 18 17 16 AI 1 OHM AI 2 OHM AI 4 V mA OUT 7 OUT 6 OUT 5 OUT 4 OUT 8 OUT 1 OUT 3 OUT 2...

Page 9: ...roadcasting the Service Message The Service Message allows a device on the E Bus to be positively identified The Service Message contains the controller ID number and therefore can be used to confirm the physical location of a particular Excel 10 in a building There is one method of broadcasting the Service Message from an Excel 10 W7753A Controller This uses a hardware push button on the side of ...

Page 10: ...cycled or the node is reset The alarm is not issued until FanFailTime seconds have elapsed since the loss of flow condition was first reported DIRTY_FILTER 7 The pressure drop across the filter exceeds the limit and the filter requires maintenance The control runs normally SMOKE_ALARM 8 The smoke detector has detected smoke and the node has entered an emergency state IAQ_OVERRIDE 9 The indoor air ...

Page 11: ...EXCEL 10 W7753A UNIT VENTILATOR CONTROLLER 11 95 7520 02 ...

Page 12: ...nal Inc 95 7520 02 K K Rev 03 09 Automation and Control Solutions Honeywell International Inc Honeywell Limited Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley MN 55422 Toronto Ontario M1V 4Z9 Honeywell GmbH Böblinger Straße 17 D 71101 Schönaich customer honeywell com ...

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