SECTION 2
EES USER MANUAL
13
2.5
FUNCTIONAL DESCRIPTION
—ROOM THERMOSTAT
The room thermostat monitors the temperature of the
heated space. If the temperature of the heated
space exceeds the set value, all heat of compression
is rejected outdoors.
2.6
FUNCTIONAL DESCRIPTION
—INCOMING AND BYPASS
AIR DAMPERS AND
ACTUATORS
. The incoming and bypass air
dampers modulate to maintain a set mixed air
temperature into the combination cooler. Based on
the mixed air sensor value, a proportional controller
(
) sends a variable 0-10VDC control signal
to a proportional actuator direct mounted to each
damper shaft. Each damper operates from the same
control signal but in opposite directions, i.e. the
incoming damper is normally closed while the bypass
damper is normally open.
Both actuators are spring return so when the
compressor does not have power or is on standby,
the actuators return to their normal position. When
heat of compression is being rejected due to the
outside air temperature setpoint being exceeded , a
signal is sent to control relay 2 (
) which
overrides the control signal and drives the incoming
damper to fully open and the bypass damper to fully
closed. The incoming damper can be set to maintain
a minimum open position with the compressor
running. This ensures fresh air is always entering
the heated space.
2.7
FUNCTIONAL DESCRIPTION
—REJECTED AND
RECOVERED AIR DAMPERS
AND ACTUATORS
Refer to
. Depending on the temperature
of the heated space and the incoming outside air,
heated cooling air will either be recovered or rejected
outdoors.
Figure 2-2: EES Control Enclosure
Proportional
Controller
Control Relay 3
Control Relay 2
Control Relay 1
Power Present Relay
Transformer
Outside Air
Temperature
Controller
Fuse
Summary of Contents for 3000 EES
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Page 20: ...EES USER MANUAL SECTION 3 20 Figure 3 1 Identification EES 02250175 281 R00 ...
Page 21: ...SECTION 3 EES USER MANUAL 21 Figure 3 2 Wiring Diagram EES 02250175 264 R01 ...
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Page 45: ...Section 8 45 EES USER MANUAL PARTS LISTS ...
Page 46: ...EES USER MANUAL SECTION 8 46 8 1 EES ENCLOSURE ASSEMBLY 02250175 279 R00 ...
Page 48: ...EES USER MANUAL SECTION 8 48 8 2 EES ELECTRICAL CONTROL ASSEMBLY 02250171 648 R00 ...
Page 50: ...EES USER MANUAL SECTION 8 50 8 3 EES DISCHARGE ENCLOSURE ASSEMBLY 02250171 646 R00 ...
Page 52: ...EES USER MANUAL SECTION 8 52 8 4 EES PACKAGE CLEAN AIR INLET OPTION 02250176 044 R00 ...
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