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 mm
2
) 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
ON
W
ORKS
® networks. The L
ON
W
ORKS
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
ON
W
ORKS
Mechanisms Interface
Description, EN0B-0270GE51).
IMPORTANT
Do not bundle wires carrying field device signals or
L
ON
W
ORKS
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 L
ON
W
ORKS
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 L
ON
W
ORKS
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
TERMINATION
MODULE
9
9
10
10
11
11
12
12
Fig. 3. Termination module connection (daisy-chain network configuration)
