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EXCEL 10 W7750A,B,C CONSTANT VOLUME AHU CONTROLLER
74-2958—118
Fig. 9. Functional profile of L
ON
M
ARK
® RTU object details
(variables not implemented in Excel 10 CVAHU
are greyed).
Environmental:
Operatin
g
Temperature: -40 to 150°F
(
-40 to 65.5°C
)
.
Shipping Temperature:
-40 to 150°F
(
-40 to 65.5°C
)
.
Relative Humidity:
5% to 95% noncondensin
g
.
Vibration:
Rated V2 level compliant.
Inputs/Outputs:
The W7750A Unit supports the followin
g
hardware features:
• Three 20 Kohm NTC
(
1000 throu
g
h 150,000 ohm
)
or
PT3000
(
250 throu
g
h 12,000 ohm
)
resistive analo
g
inputs
(
one reserved for space temperature and one reserved for
the setpoint knob
)
.
• Three dr
y
contact di
g
ital inputs
(
one reserved for the
B
y
pass pushbutton
)
.
• LED di
g
ital output
(
only
for the wall module LED
)
2.5V at 3
mA.
• Six 24 Vac rela
y
di
g
ital outputs
(
1.5A rela
y
s rated at 7.5A
inrush current
)
.
The W7750B,C Units support the followin
g
hardware features:
• Four 20 Kohm NTC
(
1000 throu
g
h 150,000 ohm
)
or
PT3000
(
250 throu
g
h 12,000 ohm
)
resistive analo
g
inputs
(
one reserved for space temperature and one reserved for
the setpoint knob
)
.
• Two 0.2 to 10 VDC or 2 to 20 mA
(
user selectable
)
analo
g
inputs.
• Five dr
y
contact di
g
ital inputs
(
one reserved for the B
y
pass
pushbutton
)
.
• Ei
g
ht on the W7750B
(
five on the W7750C
)
24 Vac Triac
di
g
ital outputs
(
500 mA MAX
)
. The W7750C Unit also
supports three 4 to 20 mA analo
g
outputs.
• LED di
g
ital output
(
only
for the wall module LED, T7770
models or LCD, T7560A,B
)
2.5V at 3 mA.
• One 20 Vdc power suppl
y
for auxiliar
y
devices with a
maximum current of 50 mA.
ANALOG INPUTS:
NOTE: Onl
y
one of each t
y
pe of input is allowed. For
example, onl
y
one Outdoor Air Temperature sensor
is allowed. No duplicate Outdoor Air Temperature
sensors are usable on the same controller.
Space Temperature:
T
y
pe: RTD.
Supported Sensors: T7770A,B,C,D; T7560A,B.
Discharge Air Temperature:
T
y
pe: RTD.
Supported Sensors: C7100A1015*, C7770A1006,
C7031B1033, C7031C1031, C7031D1062, C7031F1018
(
W7750B,C onl
y)
, C7031J1050, C7031K1017.
Outdoor Air Temperature:
T
y
pe: RTD.
Supported Sensors: C7170A1002.
Return Air Temperature:
T
y
pe: RTD.
Supported Sensors: C7100A1015*, C7770A1006,
C7031B1033, C7031C1031, C7031D1062, C7031F1018
(
W7750B,C onl
y)
, C7031J1050, C7031K1017.
*The PT3000 sensor is not recommended for floatin
g
control
(
real time - dischar
g
e or return confi
g
ured as space sensor
)
.
The PT3000 sensor is intended for monitorin
g
or differential
(
sta
g
ed
)
control
Hardware
Output
Roof Top Unit
Controller number 8030
Mandatory
Network
Variables
Manufacturer
Defined
Section
Optional
Network
Variables
nv9
nviOutsideRH
SNVT_lev_percent
nv8
nviOutsideTemp
SNVT_ temp_p
nv7
nviSetPtOffset
SNVT_ temp_p
nv6
nviOccCmd
SNVT_occupancy
nv5
nviApplicMode
SNVT_hvac_mode
nv16
nvoCO
2
SNVT_ppm
nv12
nvoOutsideRH
SNVT_ lev_percent
nv11
nvoOutsideTemp
SNVT_ temp_p
nv10
nvoEffectSetPt
SNVT_ temp_p
nv2
nviSetPoint
SNVT_temp_p
nv1
nviSpaceTemp
SNVT_temp_p
nv4
nvoUnitStatus
SNVT_hvac_status
nv3
nvoSpaceTemp
SNVT_ temp_p
nv13
nviSpaceRH
SNVT_ lev_percent
nv14
nviCO
2
SNVT_ppm
Hardware
Input
nc42 - CO
2
Limit
nc49 - Send Heartbeat (mandatory)
nc60 - Occupancy Temperature Setpoints
(optional)nc48 - Maximum Receive Time
nc17 - Location
(mandatory)
(optional)
(mandatory)
Configuration Properties
nv15
nviEmergCmd
SNVT_hvac_emerg
M11580