SYSTEM COMPONENTS:
All
components
of
the
W7080
Multizone
Control
System
are
briefly described in this
section.
For detailed information
on
C7046B and
C7100B
sensors. T7080A,B Thermostats and
W7081A Limit Controller, refer to the associated specifica-
tion
sheets
(form
number
in parenthesis): C7046B
(60-
2350),
C7100B
(60-2539),
T7080A,B
(60-2527),
W7081A
(60-
2512).
C7046B
Temperature
Sensor
-
(Ranco
TR1-1001)
is
non-
averaging type with 6 in.
[152
mm]
probe
for
use in
ducts
where
space
does
not
permit
t
longer
C7100B.
C7100B
Averaging
Temperature
Sensor
-
(Ranco
TR1-
1002,-1003)
installed
in hot
deck,
cold
deck
and
mixed air
ducf
to
provide
limit signals for limit controller operation.
Also
installed
in
discharge
air duct of
each
zone to provide
anticipation
for the T7080 Thermostat. Sensor probe
length
is 13 in. [330 mm].
H205A
Enthalpy
Controller
-
(Ranco
(15)
senses
heat
content (temperature and humidity) of outdoor air.
Allows
use
of
outdoor
air for
free
cooling.
S7666A
Simulator
-
(Ranco
TEI)
portable
unit
provides
check of
system
by substituting
adjustable
DC
voltage
for
zone
thermostat
and
sensor signals.
T7080A,B
Solld
State,
Dual
Setpoint
Thermostat
-
(Ranco
TR3, TR4) modulates zone dampers and
supplies
load demand signal to load analyzer. Single voltage ramp
design
has variable, 3 to 30°F
[I.7
to
16.7%]
dead bard.
For complete T702OA.B information, refer to form number
60-2527,
T7080A
has
a
built-in
sensor;
T7080B
requires
remote
sensor.
W7080A
Load Analyzer
-
(Ranco
EA3) provides SPOT
relay
switching of
three
stages
of healing and
three
stages
of cooling and modulating
output
to
economizer
and valve
motors
in response to highest healing and cooling demand
from
zone
thermostats. Analyzer is source cl 24 Vdc power
for
zone
thermostats
sensors,
and
W7081A
Limit
Controller.
W7081A
Limit
Controller
-
(Ranco
EA5-G3002)
provides
economizer control in addition to hot and
cold
deok
selec-
table
limik.
Saves
energy by maintaining
selected
tempera-
ture limik of hot and
cold
decks
when
zone
demands
are
reduced.
For
complete
W7081A
information,
refer
to
form
number W-2512.
W7082A Integrator
Analyzer
-
(Ranco
EA5-C6001-35)
op-
tional
unit
controls
system
blower
in VAV systems in
response
to
zone
demand. During
decreased
demand, the
W7082A
reduces
fan
output, thus saving
energy.
(Requires
additional
blower
equipment. not
available
from Honeywell.)
W7083A
Electric
Heat
Seq.
-
(Replaces
Ranco
EA5-C0501)
optional
unit
switches
up to five ON/OFF
stages
of
electric
heat,
provides
stage
turn
on
delay
on
power restoration.
W7084A
Zom Adder
-
(Ranco
EA5-C9001,-C9002)
option-
al
unit
permits
the
addition
of up to
12
zones
to
system.
196325s Fourth
Stage
Cooling
Board
-
(Ranco
EA5-
C9100
optional
unit
permits
addition
of a fourth stage of
coding
to
system.
ELECTRICAL RATINGS:
Voltage
and
Frequency
-
24
Vac,
50/60
HZ.
Maximum
Power
Consumption
-
W7080A
IO VA;
W7081A, 0.29 VA;
W7082A,
1.5 VA; W7083A,
1.4 VA; W7084A, 3 VA.
Contact
Ratings
(SPDT
pilot
duty
relays)
-
See
Table
I.
SYSTEM INPUT
SIGNALS:
See
Table
2.
SYSTEM OUTPUT SIGNALS:
See
Table 3.
STAGE DIFFERENTIALS AND THERMOSTAT DEAD
BAND:
See
Figure
1.
Table 1
Relay Contact
Ratings
for
W7080A,
W7083A,
1953258
Voltage Inrush Running
Contact
Vac
VA VA
Normally
open
24
I
240
60
1
12Oi240
I
750
1
75
Normal
dosed
24 75
30
1
20/240 240 40
Table 2
System
Input
Signals
TO
Signal (Vdc) From
W7080A 2-22 T7080A,B
W7081A
2-12 (LO)
W7080A,
W7084A
12-22 (HI)
W7083A 2-12
W7080A,
W7081A
195325B
12-24
W7080A,
W7081A
M745K,L 14-17
W7081A
M744D, M745G.P 4-7
W7081A
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