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® U.S. Registered Trademark
Copyright © 2011 Honeywell Inc. ▪ All Rights Reserved EN1B-0250GE51 R0111B
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 controller.
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
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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
mm
2)
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 L
ONWORKS® 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 L
ONWORKS Mechanisms Interface
Description, EN0B-0270GE51).
IMPORTANT
Do not bundle wires carrying field device signals or
L
ONWORKS 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 electromagnetic noise (EMI).
The unit must be wired to the L
ONWORKS network using level
IV 22 AWG (Belden part number 9D220150) or plenum-rated
level IV 22 AWG (Belden part number 9H2201504) nonshielded, twisted-pair, solid-conductor wire. When possible,
use Honeywell AK3781, AK3782, AK3791, or AK3792 cable
(US part numbers). See Excel 50/5000 L
ONWORKS
Mechanisms (EN0B-0270GE51) for details, including max.
lengths. Use wire with a min. size of 20 AWG (0.5 mm
2
) and a
max. size of 14 AWG (2.5 mm
2
).
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 COIL UNIT CONTROLLER
W7752 FAN COIL UNIT CONTROLLER
TERMINATIO
N
MODULE
991010111112
12
Fig. 3. Termination module connection (daisy-chain network configuration)
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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 mm
2
) for all
input/output connections. Use a minimum of 16 AWG
(1.5 mm
2
) 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 mm
2
) conductor.
Multiple wires that are 14 AWG (2.5 mm
2
) 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.
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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
D
G
N
D
D
I
G
I
T
A
L
I
N
P
U
T
LED
SETPOINT
FAN / BYPASS
TEMP SENSOR
AGND
LonWorks BUS IN
LonWorks BUS IN
LonWorks BUS OUT
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
SUPPLY VOLT
PWR RELAY IN (D,F MODELS, ONLY)
PWR RELAY OUT (D,F MODELS, ONLY)
W7752 FAN COIL UNIT CONTROLLER
WALL MODULE
CONNECTIONS
LONW
ORKS
NETWORK IN
L
ONWORKS
NETWORK OUT
OCCUPANCY SENSOR
CHANGEOVER CONTACT
AIRFLOW CONTACT
WINDOW CONTACT
MOTION SENSOR
OPEN
OPEN
CLOSE
CLOSE
COM
COM
HI
MED
LO
HEAT
COOL
REHEAT
RETURN
POWER MAINS
L
N
FAN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
4A
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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