Honeywell Excel 5000 Open System Installation Instructions page 2

W7762A,B HYDRONIC CONTROLLERS
Fig. 2. Subbase mounting dimensions.
IMPORTANT (US only)
If the W7762 Controller is used on UL 1995 Heating
and Cooling Equipment and the transformer
primary power is more than 150 Vac, connect the
transformer's secondary to earth ground. For these
applications, only one Excel 10 controller can be
powered by each transformer.
Communications
Wire the controller communications E-Bus 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 E-Bus Wiring Practices, form number
74-2865, for more information including maximum lengths.
Pull the cable to each controller on the E-Bus and connect to
terminals 19 and 20.
Fig. 3. Termination module connection (daisy-chain network configuration).
95-7563-3
W7762 HYDRONIC CONTROLLER
Проектирование. Монтаж. Продажа. - http://vskd.ru
The W7762 Hydronic Controller utilizes a free topology trans-
ceiver (FTT10A) Link Power compatible E-Bus that allows
daisy-chain, loop, and star network configurations or any
combination thereof. Depending upon the E-Bus con-
figuration used, one or two termination modules, part number
209541B, may be required. Different connections to the
termination module are necessary depending upon whether it
is used in a singly- or doubly-terminated network con-
figuration. See Excel 10 FTT/LPT 209541B Termination
Module Installation Instructions, form 95-7554.
NOTES:
— The E-Bus is insensitive to polarity, eliminating
installation errors due to miswiring.
— Do not bundle output wires with sensor, digital input or
communications bus wires. Maintain a minimum 3-in.
(76-mm) separation between E-Bus and Triac output and
power supply wiring.
— For installations, try to avoid areas of high electro-
magnetic noise (EMI).
— Some T7770 Wall Modules used with Hydronic con-
trollers have a daisy-chain connection for the E-Bus to
provide network access via built-in jack.
— For more information; see E-Bus Wiring Guidelines, form
number 74-2865.
Wall Modules
A variety of Excel 10 wall modules can be used with W7762
Hydronic Controllers. See T7460 Wall Modules Installation
Instructions, form number 95-7610; T7560 Digital Wall
Module Installation Instructions, form number 95-7620; and
T7770 Wall Modules Installation Instructions, form number
95-7538 for installation details.
NOTE: Wall Modules with fan speed switches must not be
used with W7762 controllers.
W7762 HYDRONIC CONTROLLER
19
20
2
19
20
BROWN
ORANGE
TERMINATION
MODULE (209541B)