Honeywell Excel 10 Installation Instructions Manual page 6

EXCEL 10 W7754K,P,Q FAN COIL UNIT CONTROLLERS
Digital Inputs
The Excel 10 W7754 FCU Controller's digital inputs are
suitable for connection with dry contacts, only.
Digital Outputs
The triac outputs or relay outputs can be configured (using
Honeywell's LNS plug-in) for different functions.
You can configure the four triac outputs for connection to
either a floating drive or to a thermal actuator. Once the out-
puts have been configured, the corresponding devices can be
directly connected to them.
Table 3. Output assignments for various actuator types
output type stage
floating --
0
1-stage
1
0
2-stage 1
2
0
1
3-stage
2
3
PWM --
thermal --
Relay Outputs
The W7754K1001 is equipped with three relays; the
W7754P1000 and W7754Q1008 have four relays.
Hardware Limits
•
A min. current of 50 mA is required to ensure a reliable
contact.
•
The normally-open contacts are designed for a max.
continuous current of 3 A (for relays 1, 2, and 3 together)
and 10 A (relay 4), respectively.
NOTE: If inductive components are to be connected to the
relays and if these relays switch more often than
once every two minutes, these components must be
prevented from causing harmful interference to radio
or television reception (conformance with
EN 45014).
Triac Outputs
The Excel 10 W7754 FCU Controller is equipped (depending
upon the model) with one to four triac outputs.
Hardware Limits for Excel 10 W7754K,P (230 Vac Power Supply)
•
Low signal: 0 V; high signal: 230 Vac
•
Maximum allowable continuous current for each
individual triac output: 500 mA
•
Maximum allowable peak current (for 10 seconds) for
each individual triac output: 1 A
•
Maximum allowable continuous current for all of the
triac outputs together: 1 A.
• cos ϕ > 0.8
EN1B-0304GE51 R0306C
OUT1 OUT2
19 20 21
close open close
-- OFF --
-- ON --
OFF OFF OFF
OFF ON OFF
ON OFF ON
OFF OFF OFF
OFF ON OFF
ON OFF ON
ON ON ON
-- PWM --
-- ON/OFF --
Hardware Limits for Excel 10 W7754Q1008 (24 Vac Power Supply)
•
Low signal: 0 V; high signal: 24 Vac
•
Maximum allowable continuous current for each
individual triac output: 500 mA
•
Maximum allowable peak current (for 10 seconds) for
each individual triac output: 1 A
•
Maximum allowable continuous current for all of the
triac outputs together: 1 A.
• cos ϕ > 0.8
Analog Inputs
The Excel 10 W7754 FCU Controller is equipped with two
analog inputs (for connection to a room sensor and to a wall
module with temperature setpoint adjustment, respectively).
22
analog input
open
OFF
AI1
ON
AI2
OFF
1) If the sensor measures a temperature outside of the range
ON
of 0...70 °C, this is interpreted as a sensor break / short
OFF
circuit.
OFF
ON
Replacing the Fuse
OFF
ON
NOTE: Before replacing the fuse (see also Fig. 1 on page
PWM
1), disconnect the controller from the power source
ON/OFF
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 Excel 10 W7754 FCU Controllers feature a L
service LED and corresponding L
(see Fig. 1) for commissioning and troubleshooting.
When the service button is pressed, the service pin message
is broadcast.
See Table 5 on page 7 for a description of the meaning of the
various different possible behaviors of the L
LED. For more information on standard service LED behavior,
refer to Motorola L
Manual, page AL-190.
Possible Problems and Recommended Actions
Check if the L
you switch the power OFF/ON. Please contact Honeywell if
this does not solve the problem.
6
Table 4. Analog input usage
wall module
1)
room sensor
setpoint adjustment
W
ON ORKS
W Technology Device Data
ON ORKS
W service LED's behavior is changed if
ON ORKS
W
ON ORKS
service button
W service
ON ORKS