Honeywell EXCEL 10 Installation Instructions Manual page 8

EXCEL 10 W7754K,P,Q,R,S,T,V FCU CONTROLLERS − INSTALLATION INSTRUCTIONS
OUTPUT 2
10.0 V
AO (0...100% = 0...10 V),
no feedback on LonWorks network
7.3 V
6.0 V
no heat, no cool
4.7 V
2.0 V
0.0 V
100% 0%
nvoCoolOutput
0%
nvoFCUStatus.output_position[0]
Fig. 8. Operational sequence with Belimo 6-way valve
connected to the analog output (2....10 V)
Replacing the Fuse
NOTE: Before replacing the fuse (see also Fig. 1 on page
1), disconnect the controller from the power source
by detaching the removable terminal plug attached to
terminals 25 and 26.
CAUTION
Depending upon actual wiring, even after you have
switched OFF the power supply, the relays may still be
under high voltage.
When replacing the controller's fuse, please replace with the
same type listed on the terminal assignment label (e.g.:
F2.5H250V).
Troubleshooting
All units feature a L W
ON ORKS
L W service button (see Fig. 1) for commissioning and
ON ORKS
troubleshooting.
When the service button is pressed, the service pin message
is broadcast.
See Table 10 on page 9 for a description of the meaning of
the various different possible behaviors of the L
service LED. For more information on standard service LED
behavior, refer to Motorola L
Data Manual, page AL-190.
EN1B-0304GE51 R0916M
0% 100%
nvoHeatOutput
100%
service LED and corresponding
W
ON ORKS
W Technology Device
ON ORKS
Possible Problems and Recommended Actions
Check if the L W service LED's behavior is changed if
ON ORKS
you switch the power OFF/ON. Please contact Honeywell if
this does not solve the problem.
Accessories
Terminal Protection Cover
Required for wall mounting. Set of eight covers.

order no.:
L W Termination
ON ORKS
One or two L W terminations are required, depending
ON ORKS
on the given LonWorks bus layout. See section "Connecting
to the L W Network" on page 5.
ON ORKS
The following L W
ON ORKS

XAL-Term2 L W
ON ORKS
Module, which can be mounted on DIN rails and in fuse
boxes
1
5
2
6
FTT/LPT BUS
3
4
BUS TOPOLOGY:
1
2 5
6
3 4
REMOVABLE SCREW-TYPE
2-POLE TERMINAL BLOCK
Fig. 9. L W connection and termination module
ON ORKS
8
XAL_COV_L
termination module is available:
Connection and Termination
LONWORKS TERMINATION
PLUG-IN JUMPER
PARK POSITION
(NO TERMINATION)
FTT/LPT FREE
FTT/LPT FTT/LPT
FREE TOPOLOGY:
105 OHM 52.3 OHM
1
100 μ 100 μ
105 Ohm 52.3 Ohm
100 μ 100 μ
2
1
2