System Output Signals
0 to -10
COLD DECK LOW LIMIT:
Limits cold deck temperature
or 55°F [7.2°C, 10% or
HOT DECK HfGH LIMIT:
Limits hot deck temperature to selectable setpoints of 90°F,
110°F or 130°F [32.2°C, 43.3°C or 54.4%).
W 7 0 8 3 A ,
Inverter (VAV fan
to selectable setpoints of 45°F.
Economizer motor modulates outdoor air damper to mink
mum position when mixed air temperature
of W7081A Limit Controller. This setpoint is selectable to
50°F. 55°F or 60°F [10°C, 12.8°C or 15.6°C], with a 10°F
[5.6°C] fixed throttling range.
Selectable from 0 to - 8 Vdc (0 to 60 percent fan motor
20:1, which means a 20°F [11.1°C] rise at the zone dii
produces a voltage change equal to a 1°F
[0.5°C] rise at the space thermostat.
Operating- -40 to 150°F [-40 to 65°C]
Shipping- -30 to 150°F [-34 to 65°C]
The W7080A, W7081A, W7082A, W7083A, W7084A units
each attach with four screws through mounting holes in the
base (saws not provided). The 195325B
coding Board can be mounted on a Rat surface. Sea in-
dividual specification sheets for mounting details.
LABORATORIES INC. CCMPONENT
SA481, Guide number SDFY2D
and 19253258 units only).
ADDITIONAL SYSTEM COMPONENTS:
C7100B (13 In.) Averaging
sensor in hot deck, one sensor in cold deck and one sen-
sor in mixed air to supply the three sensor input signals re-
quired by the W7081A Limit Controller. Also, one sensor is
installed in each zone discharge duct to supply anticipation
to the T7080A Zone Thermostat.
Where space is insufficient for he 13 in. [304.8 mm] probe
of the C7100B, the C7046B single point temperature
sor, with 6 in. [152.4 mm] probe, may be installed.
1353258 Fourth Stage Cooling Board - Controls opera-
tion of two stage compressor in the system. Mounts
from other components.
H205A Enthalpy Controller - Controls economizer opera-
tion in response to enthalpy (total heat content) of outdoor
air. Signals economizer to close outdoor air damper (or
modulate m minimum position) when enthalpy is above
and to open damper on a call for cooling
is below setpoint.
is below setpoint
Sensor - One