Honeywell W7752D2007 User manual

® U.S. Registered Trademark

Excel 10

W7752D,E,F,G FAN COIL UNIT CONTROLLERS

HONEYWELL EXCEL 5000 OPEN SYSTEM

INSTALLATION INSTRUCTIONS

The Excel 10 Fan Coil Unit (FCU) Controller is available in the

following four models:

W7752D2007 (230 Vac, with electric reheat relay),

W7752E2004 (230 Vac, without electric reheat relay),

W7752F2002 (115 Vac, with electric reheat relay),

W7752G2000 (115 Vac, without electric reheat relay).

All have identical housings and mounting procedures.

IMPORTANT

It is recommended that devices be kept at room

temperature for at least 24 hours before applying

power to allow any condensation resulting from low

shipping/storage temperatures to evaporate.

This device must be installed in a UL-listed

enclosure offering adequate space to maintain the

segregation of line voltage field wiring and Class 2

field wiring (US requirement only).

INSTALLATION

Mount the Fan Coil Unit controllers in locations that allow

clearance for wiring. The controllers can be mounted on a

panel with screws or by snapping onto standard EN 50 022

DIN rail, 1-3/8 by 9/32 in. (35 mm by 7.5 mm). See Fig. 1 for

mounting dimensions. See Fig. 2 for DIN rail mounting. The

type and length of screw required for screw mounting

depends upon the panel material used to mount the con-

troller.

The controller can be mounted either vertically or horizontally.

However, if thermal actuators are connected to the controller

outputs, it is recommended that the controller be mounted so

that the transformer is not located beneath the electronics.

WARNING

ELECTRICAL SHOCK HAZARD.

Source power at terminal block can cause personal

injury or death. W7752 FCU Controllers must be

mounted inside their respective fan coil unit boxes to

prevent access by unauthorized personnel.

To reduce the risk of fire or electric shock, install in a

controlled environment relatively free of contaminants.

Wiring

All wiring must comply with applicable electrical codes and

ordinances. Refer to job or manufacturers’ drawings for

details.

Fig. 1. Excel 10 Fan Coil Unit Controller outside and mounting dimensions in in. (mm)

BEFORE INSTALLATION

W7752D,E,F,G FAN COIL UNIT CONTROLLERS −INSTALLATION INSTRUCTIONS

EN1B-0250GE51 R0111B 2

Fig. 2. DIN rail mounting

Power

Input power provided must be 230 Vac (+10%, -15%), 50 or

60 Hz for W7752D and E; 115 Vac (+10%, -15%), 50 or

60 Hz for W7752F and G.

CAUTION

Turn OFF power prior to connecting to or removing

connections from any terminals to avoid electrical

shock or equipment damage.

Use the heaviest gauge wire available, up to 14 AWG (2.5

mm2)with a minimum of 18 AWG (1.0 mm2) for all power

wiring. Strain relief/support must be provided for power wiring

within 2-3/8 in. (60 mm) of controller connection.

IMPORTANT

To comply with CE requirements, with devices

having a voltage range of 50 to 1000 Vac or 75 and

1500 Vdc which are not provided with a supply cord

and a plug or with other means for disconnection

from the supply having a contact separation of at

least 3 mm in all poles, the means for disconnection

must be incorporated in the fixed wiring.

LonWorks Communications

The unit is equipped with a free-topology transceiver for

communication on LONWORKS® networks. The LONWORKS

network is insensitive to polarity, eliminating the possibility of

installation errors due to miswiring.

Different network configurations (daisy-chain, loop, and star

configurations, or any combination thereof) are possible (see

also Excel 50/500 LONWORKS Mechanisms Interface

Description, EN0B-0270GE51).

IMPORTANT

Do not bundle wires carrying field device signals or

LONWORKS communications together with high-

voltage power supply or relay cables. Specifically,

maintain a min. separation of 3 inches (76 mm)

between such cables. Local wiring codes may take

precedence over this recommendation.

IMPORTANT

Try to avoid installing in areas of high electro-

magnetic noise (EMI).

The unit must be wired to the LONWORKS network using level

IV 22 AWG (Belden part number 9D220150) or plenum-rated

level IV 22 AWG (Belden part number 9H2201504) non-

shielded, twisted-pair, solid-conductor wire. When possible,

use Honeywell AK3781, AK3782, AK3791, or AK3792 cable

(US part numbers). See Excel 50/5000 LONWORKS

Mechanisms (EN0B-0270GE51) for details, including max.

lengths. Use wire with a min. size of 20 AWG (0.5 mm2) and a

max. size of 14 AWG (2.5 mm2).

Wall Modules

A variety of Excel 10 wall modules can be used with W7752

FCU Controllers. See T7460 Wall Modules Installation

Instructions (95-7610) and T7560 Digital Wall Module

Installation Instructions (EN1B-0146GE51) for details.

W7752 FAN

IL UNIT

NTR

LLER W7752 FAN COIL UNIT CONTROLLER

TERMINATIO

MODULE

910

10 11

11 12

Fig. 3. Termination module connection (daisy-chain network configuration)

W7752D,E,F,G FAN COIL UNIT CONTROLLERS −INSTALLATION INSTRUCTIONS

3 EN1B-0250GE51 R0111B

Wiring Details

Connections to the FCU controllers are made at two terminal

blocks protected by a plastic cover. W7752D and F models

have two additional terminals on terminal block 2 for electric

reheat connections. Fig. 4 shows removal of the terminal

block cover.

Use a minimum wire size of 20 AWG (0.5 mm2) for all

input/output connections. Use a minimum of 16 AWG

(1.5 mm2) for electric reheat output connections. The

maximum length of all input/output cables and wall module

interface cables is 65 ft (20 m). The maximum length for fan

power switching cables is 3 1/2 ft (1 m).

Fig. 6 illustrates the terminal assignments of the controllers.

Table 1 lists Triac output assignments for various actuator

types. Refer to job drawings for specific wiring diagrams.

IMPORTANT

Screw-type terminal blocks are designed to accept

no more than one 14 AWG (2.5 mm2) conductor.

Multiple wires that are 14 AWG (2.5 mm2) can be

connected using a wire nut. Include a pigtail with this

wire group and attach the pigtail to the individual

terminal block.

Fig. 4. Terminal cover removal

Wire to the terminal blocks as follows:

1. Strip 1/2 in. (13 mm) insulation from the conductor.

2. Insert the wire in the required terminal location and

tighten the screw to complete the termination.

3. If two or more wires are being inserted into one terminal

location, twist the wires together before inserting them.

IMPORTANT

When two or more wires are to be attached to the

same terminal, be sure to twist them together.

Deviations from this rule can result in improper

electrical contact. See Fig. 5. Local wiring codes

may take precedence over this recommendation.

W7752D,E,F,G FAN COIL UNIT CONTROLLERS −INSTALLATION INSTRUCTIONS

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: (49) 7031 63701

Fax: (49) 7031 637493

http://ecc.emea.honeywell.com

Subject to change without notice. Printed in Germany

EN0B-0250GE51 R0111B

DGND

DIGITALINPUT

LED

SETPOINT

FAN / BYPASS

TEMP SENSOR

AGND

LonWorks BUS IN

LonWorks BUS OUT

OUT 1 COM

OUT 1 OPEN

OUT 1 CLOSE

OUT 2 COM

OUT 2 OPEN

OUT 2 CLOSE

RELAY COM

RELAY 1

RELAY 2

RELAY 3

SUPPLY VOLT

PWR RELAY IN (D,F MODELS, ONLY)

PWR RELAY OUT (D,F MODELS, ONLY)

W7752 FAN COIL UNIT CONTROLLER

WALL MODULE

CONNECTIONS

ORKS

NETWORK IN

ORKS

NETWORK OUT

OCCUPANCY SENSOR

CHANGEOVER CONTACT

AIRFLOW CONTACT

WINDOW CONTACT

MOTION SENSOR

OPEN

COM

MED

HEAT

COOL

REHEAT RETURN

POWER MAINS L

FAN

0.5A

16A

Fig. 6. Input/output details

Table 1. Output assignments for various actuator types

output type Out 1 terminal Out 2 terminal

13 14 15 16 17 18

floating 24 Vac open close 24 Vac open close

1-stage 24 Vac ON/OFF — 24 Vac ON/OFF —

2-stage 24 Vac stage 1 stage 2 24 Vac stage 1 stage 2

3-stage 24 Vac stage 1 stage 2 24 Vac stage 1 stage 2

stage 3 stage 3

PWM 24 Vac PWM — 24 Vac PWM —

thermal 24 Vac ON/OFF — 24 Vac ON/OFF —

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