Honeywell W7754Q, W7754P, W7754K SPECIFICATION DATA

HONEYWELL EXCEL 5000 OPEN SYSTEM

FEATURES

 LONMARK® HVAC profile #8020
 Stand-alone operation or on high-speed 78 kilobit

 Uses Echelon LonTalk
 FTT10A Transceiver
 Direct connection of thermal actuators
 Direct connection to fan switch
 Direct and indirect connection to electrical heat
 Factory-configured default parameters
 Wide range of supported valves and actuators
 Interlocks and time delays to protect equipment
 Connected floating actuators exercised once a week
 Slim design fits into narrow fan coil units
 Terminals all on one side allow controllers to be

GENERAL

The W7754 is a configurable fan coil unit application
controller belonging to the Excel 10 product line for
maintained zones. The W7754 covers a wide range of fan coil
control applications and can operate as a stand-alone unit or
networked using the standard Echelon L
Interfaces are provided for a wide range of actuator types.
Heating systems can be water or electrical, and cooling
systems can be chilled water supply or compressors.
Extensive timing and interlock features make the W7754
especially suitable for systems using electrical heat and
compressors.

ONWORKS

®

bus.

 Power supplied by power mains or 24 V

DESCRIPTION

The W7754K,P,Q Controllers provide room temperature
control for two- and four-pipe fan coil units with optional
electrical heating coils (W7754K and W7754P) and can
control single-, two-, or three-speed fans. The units are
provided with default configuration settings from the factory
and are fully operable upon installation. Using standard
Echelon configuration tools, the units can be configured with
job-specific settings. A variety of optional wall modules
interface with the units and provide any or all of the following:
setpoint adjustment, fan speed adjustment, and an occupancy
bypass button. All wall modules include a space temperature
sensor; however, a remote C7068A return air sensor can also
be used.

Excel 10

W7754K,P,Q FCU CONTROLLERS

SPECIFICATION DATA

Echelon® LONWORKS© network

positioned at back of fan coil unit

®

protocol

® U.S. Registered Trademark
Copyright © 2010 Honeywell Inc. • All Rights Reserved EN0B-0453GE51 R0110

W7754K,P,Q FCU CONTROLLERS

Table 1. Overview of equipment (by model)

OS Number

power

supply

digital outputs

digital
inputs

analog inputs

relay

relay

relay

rd

th

triac (open OUT1)"

triac (close OUT1)

triac (open OUT2)

triac (close OUT2)

low-voltage PWM

control of solid-

state relay

LED

configurable digital

input

digital input

(window contact)

AI (fan speed +

occupancy override

switches)

analog input (room

sensor)

analog input (set-

point adjustment

3

4

switch)

230

24

relay

st

1

nd

2

W7754K1001 X X X X X X X X X X X X
W7754P1000 X X X X X X X X X X X X X X X
W7754Q1008 X X X X X X X X X X X X X X X

Sequences

Heat and cool sequences can be selected to be active or not
active, giving a total of eight different sequence options (each
can be with or without fan control):

 Heat, only
 Cool, only
 Heat/cool changeover
 Heat and cool sequence
 All of the above, plus electrical reheat.

"Unoccupied" Mode

This mode is used for longer unoccupied periods, such as at
night or during weekends and holidays.

Window Open

If the controllers are configured for window open detection,
they automatically disables heat and cool control until the
window is closed again. Frost protection remains active.

Frost Protection

If the temperature drops below 46°F (8°C), the controllers
enable the heating circuit as frost protection.

Smoke Control

The fan can be turned ON or OFF by network command for
smoke control.

Fan Failure

When configured with an air flow detector, the controllers
protect equipment by disabling the system when the fan fails.

Changeover

The controllers operate two-pipe fan-coil units configured with
a changeover input.

Fig. 1. Operational sequence

Modes of Operation

The units have the following modes of operation.

"Occupied" Mode

This is the normal operating condition for a room or zone
when it is occupied. The controllers can be switched into this
mode by a network command, by the room occupancy sen­sor, or by a bypass button on the wall module. In the
"occupied" mode, the fan is controlled by the setting of the fan
speed switch on the wall module or, when the switch is set to
“auto,” by the control algorithm. The fan can be configured to
remain ON or turn OFF during the zero energy band.

"Standby" Mode

The "standby" mode saves energy by reducing heating or
cooling demand during periods where the room is temporarily
unoccupied. In this mode, the fan is switched OFF within the
zero energy band.

e.g. Excel 10 W7754

FCU Controller

LonWorks network

Honeywell

D-71101 Schönaich
Made in Germany

Fig. 2. Typical application

window
contact

Excel 10

wall module

EN0B-0453GE51 R0110

2

W7754K,P,Q FCU CONTROLLERS

SPECIFICATIONS

Models

All three models are equipped with a minimum of three relays,
one LED digital output, three digital inputs, and two analog
inputs.

Input/Output

Table 2. Input/output specifications

function/characteristics

1st digital
input

1st
analog
input

2nd
analog
input

1st digital
output

3rd
analog
input

2nd
digital
input

4th relay W7754P,Q only; permanently configured to

1st, 2nd,
and 3
relays

triac
outputs

2nd
digital
output

all models; configurable (using LNS plug-in) to
read input from hardwired window contact, oc­cupancy sensor, etc.; suitable for dry contacts,
only; max. voltage at open contact = 5 Vdc

all models; permanently configured to read in­put from hardwired wall module's temperature
setpoint adjustment knob; enabled / disabled
using left DIP switch

all models; permanently configured to read in­put from hardwired wall module's room tem­perature sensor (for use with an NTC20k
sensor, only; accuracy [w/o sensor] = 0.5 °C at
25 °C); enabled/disabled using left DIP switch

all models; permanently configured to write out­put to LED of hardwired wall module; enabled /
disabled using left DIP switch; max. voltage =
5 Vdc; max. current = 5 mA

all models; permanently configured to read in­put from hardwired wall module's 3-speed fan
control knob and "occupancy override" button;
enabled / disabled using left DIP switch

all models; permanently configured to read in­put from window contact; enabled / disabled
using right DIP switch; suitable for dry con­tacts, only; max. voltage at open contact =
5 Vdc

write output to hardwired electrical reheat coil;
switching voltage = 24...230 Vac; switching
current = 0.05...10 A

all models; permanently configured to write out-

rd

put to hardwired 3-speed fan; switching voltage
= 24...230 Vac; switching current = 0.05...3 A
(max. 3 A for all three relays together)

number varies according to model: permanently
configured to write output to OUT1/2; switching
voltage = 230 Vac (230-V models) or 24 Vac
(24-V models), max. switching current = 0.5 A;
max. peak (10 sec) current = 1 A

W7754K, only; suitable for attachment to a
solid-state relay (max. voltage = 12 Vdc; max.
current = 12 mA at 10 Vdc) for low-voltage
PWM control in high-current electrical reheat
applications (see section "Accessories")

Power Supply

W7754K,P: 230 Vac +10%, -15%, 50/60 Hz
W7754Q: 24 Vac 20%, 50/60 Hz

Power Consumption

See Table 2.

Hardware Design

Processor: Neuron 3150® running at 5 MHz, with 2 kB

of RAM and 0.5 kB of EEPROM on chip.

Ext. memory: EPROM, 64 kB by 8.

Specified Sensing Temperature Range

32° to 104°F (0° to 40°C)

Approvals, Certifications, and Standards

Approvals and Certifications

 CE-approved
 Certified as per LonMark® Application Layer

Guidelines V 3.0, thus interoperable with all other
devices in open L
devices)

 EUBAC-certified as follows:

W7754P1000:

W7754Q1008:

ONWORKS® networks (incl. 3

eu.bac

020885

Cert

eu.bac

020706

Cert

rd

-party

Classification according to EN60730-1

Environmental conditions: For use in home (residential,

commercial, and light-industrial)

environments
Pollution degree: Class 2
Protection against shock: Class 0 (without terminal cover)

Class II (with terminal cover)
Software class: Class A

Classification according to EN60529

(Degree of Protection Provided by Enclosures)
Without terminal cover: IP20
With terminal cover: IP30

Ambient Environmental Limits

Operating temperature: 0 … +50 °C at 5…90% r.H.
Storage temperature: -40 … +70 °C at 5…90% r.H.

W7754P1000, W7754Q1008 Temperature Control
Accuracy (CA)

(min. CA values requested by EUBAC for fan coil unit
applications: ≤ 1.4 K)
FCU heating mode: 0.5 K
FCU cooling mode: 0.2 K

Dimensions (W x L x H)

Without terminal cover: W x L x H = 110 x 180 x 60 mm
With terminal cover: W x L x H = 130 x 180 x 60 mm

Weight

W7754K,P: 420 g; W7754Q: 260 g

3

EN0B-0453GE51 R0110

W7754K,P,Q FCU CONTROLLERS

Communications

The controllers use the LonTalk protocol. They support the
L

ONMARK Functional Profile # 8020 “Fan Coil Unit Controller”,

version 2.0. Fig. 6 shows the implementation used.

The recommended wire size to be used for the L
Bus is level IV 22 AWG (Belden part no. 9D220150) or
plenum rated level IV 22 AWG (Belden part no. 9H2201504)
non-shielded, twisted pair, solid conductor wire.

FTT networks can be in bus, star, loop or any combination of
these topologies.

ONWORKS

Mounting Options

The controllers are suitable for mounting on a standard rail
(DIN EN 50022-35 x 7,5), on walls/ceilings, as well as for
installation in wiring cabinets or fuse boxes.

Accessories

 Excel 10 T7460 Wall Modules
 Excel 10 T7560 Wall Modules
 Excel 10 FTT/LPT 209541B Termination Module
 C7068A Return Air Sensor (Europe, only)
 M7410C Small Electric Linear Valve Actuator (Europe,

only)

 Z100 Thermoelectric Actuator (Europe, only)
 XAL-COV-L Terminal Protection Covers (8 pcs. bulk)
 Solid-state relay from Carlo Gavazzi (part no.:

RS1A23D25-P64) with 40-cm cable and plug, for
230 Vac and max. 25 A (AC

 XAL-Term, L

for DIN rail

ONWORKS connection/termination module

rms

)

EN0B-0453GE51 R0110

4

W7754K,P,Q FCU CONTROLLERS

+ -

RS1A

23D25

21 4

LON

GND9LED10FAN11DI2

8

5

3

DI1

SET

SENS

5

3

42 1

T7460 / T7560

12

6 23

7

GND

L

230 V

N

3A

131415 18

16

17

III II I

fan

1920

Fig. 3. W7754K sticker with input/output details

21 4

LON

GND9LED10FAN11DI2

8

5

3

DI1

SET

SENS

5

3

42 1

T7460 / T7560

12

6 23

7

GND

L

230 V

N

3A10A

131415 18

16

17

III II I

fan

1920

open

close

OUT1 OUT2

230 Vac

Fig. 4. W7754P sticker with input/output details

21 4

LON

GND9LED10FAN11DI2

8

5

3

DI1

SET

SENS

5

3

42 1

T7460 / T7560

12

6 23

7

GND

L

230 V

N

3A10A

131415 18

16

17

III II I

fan

1920

open

close

OUT1 OUT2

24 Vac

Fig. 5. W7754Q sticker with input/output details

CAUTION

In order to conform to IP30, when installed on walls or
ceilings, the unit must be equipped with the optional
terminal protection cover.

Ho ne ywe l l

D-71101 Schönaich
Made in Germany

triac

0.5 A

2526

24

2122

com

com

open

OUT2

230 Vac

Ho ne ywe l l

D-71101 Schönaich
Made in Germany

2122

open

close

Honeywell

D-71101 Schönaich
Made in Germany

2122

open

close

triac

0.5 A

triac

0.5 A

230 V

2526

24

com

com

230 V

2526

24

~~

com

com

24 Vac

Hardware
Output

Fan Coil Unit Controller
Object #8020

F2.5H

LN

F2.5H

LN

F2.5H

nviSpaceTemp

nv1

SNVT_temp_p

nviSetPoint

nv2

SNVT_temp_p

nviFanSpeedCmd

nv6

SNVT_switch

nviOccCmd

nv7

SNVT_occupancy

nviApplicMode

nv8

SNVT_hvac_mode

nviSetPtOffset

nv9

SNVT_temp_p

nviWaterTemp

nv10

SNVT_temp_p

nviDischAirTemp

nv17

SNVT_temp_p

nviEnergyHoldOff

nv18

SNVT_switch

Mandatory
Network
Variables

Optional
Network
Variables

nvoHeatOutput

nv3

SNVT_lev_percent

nvoCoolOutput

nv4

SNVT_lev_percent

nvoFanSpeed

nv5

SNVT_switch

nvoTerminalLoad

nv11

SNVT_lev_percent

nvoLoadAbs

nv12

SNVT_power

nvoDischAirTemp

nv13

SNVT_temp_p

nvoReheat

nv14

SNVT_switch

nvoSpaceTemp

nv15

SNVT_temp_p

nvoEffectSetPt

nv16

SNVT_temp_p

nvoEffectOcc

nv19

SNVT_occupancy

nvoEnergyHoldOff

nv20

SNVT_switch

nvoUnitStatus

nv21

SNVT_hvac_status

Configuration Properties

nc49 - nciSndHrtBt SNVT_time_sec mandatory
nc52 - nciMinOutTm SNVT_time_sec optional
nc48 - nciRcvHrtBt SNVT_time_sec optional
nc17 - nciLocation SNVT_str_asc optional
nc60 - nciSetPnts
nc59 - nciNumValve

nviSensorOcc
SNVT_Occupancy

nviEmerg
SNVT_hvac_emerg

nviReheatRelay
SNVT_switch

SNVT_temp_setpt
SNVT_count

Manufacturer

Defined
Section

mandatory
optional

nvoSensorOcc
SNVT_occupancy

nvoDigitInState
SNVT_switch

Hardware

NOT SUPPORTED.

Fig. 6. L

Input

ONMARK object details

Manufactured for and on behalf of the Environmental and Combustion Controls Division of Honeywell Technologies Sàrl, Rolle, Z.A. La Pièce 16, Switzerland by its Authorized Representative:

Automation and Control Solutions

Honeywell GmbH
Böblinger Strasse 17
71101 Schönaich / Germany
Phone: [phone]
Fax: [phone]
http://ecc.emea.honeywell.com

Subject to change without notice. Printed in Germany

EN0B-0453GE51 R0110