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EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
74-2958—148
Step 6. Configure Controllers
Excel E-Vision PC Software is used to confi
g
ure W7750
Controllers to match their intended application. The E-Vision
User Guide, form number 74-2588 provides details for
operatin
g
the PC software.
W7750 Controllers are shipped from the factor
y
with a default
hardware confi
g
uration. On power-up, the controller
confi
g
uration parameters are set to the default values listed in
Table 20 in Appendix C. The controller can operate normall
y
in this mode
(
if the e
q
uipment and wirin
g
match the default
setup
)
, and
g
iven valid sensor inputs, the outputs are
controlled appropriatel
y
to maintain space temperature at the
default setpoint. The default I/O arran
g
ement for the W7750A
is printed on the terminal labels. Also see the wirin
g
details in
Fi
g
. 27 in Step 4, Prepare Wirin
g
Dia
g
rams. The labeled I/O
terminals are defined in Table 10.
Step 7. Troubleshooting
Troubleshooting Excel 10 Controllers and Wall
Modules
In addition to the followin
g
information, refer to the Installation
Instructions and Checkout and Test manual for each product.
Most products have a Checkout and Test section in their
Installation Instructions manual. If not, look for a separate
Checkout and Test manual. See the Applicable Literature
section for form numbers.
ML6464A1009 Direct Coupled Actuator, 66 lb-in. tor
q
ue,
Series 60
—
ML6474A1008 Direct Coupled Actuator, 132 lb-in. tor
q
ue,
Series 60
—
ML6185A1000 Direct Coupled Actuator, 50 lb-in. sprin
g
return Series 60
V5852A/V5862A Two-wa
y
terminal unit water valve; 0.19, 0.29,
0.47, 0.74, 1.2, and 1.9 C
v
1/2 in. npt
(
13 mm
)
or 2.9 and 4.9 C
v
3/4 in. npt
(
19 mm
)
Use with M6410 Valve Actuator. Close-off ratin
g
for 0.19 to 1.9 C
v
is 65 psi; for 2.9 and 4.9, C
v
is
45 psi.
(
Coefficient of volume or capacit
y
index
C
v
=
g
allons per minute divided b
y
the s
q
uare
root of the pressure drop across the valve.
)
V5853A/V5863A Three-wa
y
mixin
g
terminal unit hot water valve;
0.19, 0.29, 0.47, 0.74, 1.2, and 1.9 C
v
1/2 in.
npt
(
13 mm
)
or 2.9 and 4.9 C
v
3/4 in. npt
(
19
mm
)
Use with M6410 Valve Actuator. Close-off ratin
g
for 0.19 to 0.74 C
v
is 55 psi; 1.2 and 1.9 C
v
is 22
psi; 2.9 and 4.9 C
v
is 26 psi.
R8242A Contactor, 24 Vac coil, DPDT —
AT72D, AT88A, AK3310, etc. Transformers —
EN 50 022 DIN rail 35 mm b
y
7.5 mm
(
1-3/8 in. b
y
5/16 in.
)
Obtain locall
y
: Each controller re
q
uires 5 in.
— Two DIN rail adapters Obtain locall
y
: Part number TKAD, from Thomas
and Betts, two for each controller.
Cabling:
— Serial Interface Cable, male DB-9 to female
DB-9 or female DB-25.
Obtain locall
y
from an
y
computer hardware
vendor.
Hone
y
well
AK3791
(
one twisted pair
)
AK3792
(
two twisted pairs
)
L
ON
W
ORKS
Bus
(
plenum
)
: 22 AWG
(
0.34 mm
2
)
twisted pair solid conductor, nonshielded or
Echelon approved cable.
Level IV 140°F
(
60°C
)
ratin
g
Hone
y
well AK3781
(
one
twisted pair
)
AK3782
(
two
twisted pairs
)
L
ON
W
ORKS
Bus
(
nonplenum
)
: 22 AWG
(
0.34
mm
2
)
twisted pair solid conductor, nonshielded
or Echelon approved cable.
Level IV 140°F
(
60°C
)
ratin
g
Hone
y
well AK3725
Inputs: 18 AWG
(
1.0 mm
2
)
five wire cable
bundle
Standard thermostat wire
Hone
y
well AK3752
(
t
y
pical or
e
q
uivalent
)
Outputs/Power: 14 to 18 AWG
(
2.0 to 1.0 mm
2
)
NEC Class 2 140°F
(
60°C
)
ratin
g
Hone
y
well AK3702
(
t
y
pical or
e
q
uivalent
)
18 AWG
(
1.0 mm
2
)
twisted pair
Non-plenum
Hone
y
well AK3712
(
t
y
pical or
e
q
uivalent
)
16 AWG
(
1.3 mm
2
)
twisted pair
Non-plenum
Hone
y
well AK3754
(
t
y
pical or
e
q
uivalent
)
14 AWG
(
2.0 mm
2
)
two conductor
Non-plenum
Table 11. Excel 10 W7750 Controller Ordering Information. (Continued)
Part Number Product Description Comments