CAPACITY CONTROLLERS – 101CAPGE
OVERVIEW
The 101CAPGE is a Gas/Electric Capacity Controller that digitally displays
leaving air temperature. It should be utilized for single stage
applications. For multistage HVAC systems, use either the CAPL-2 or CAPL-
4 Capacity Controller.
The Zonex Systems 101CAPGE capacity controller protects both the air
conditioner and furnace. It simply measures the leaving air temperature.
If the air gets too cold (drops below the cool cutout setpoint), it breaks
the “Y” connection, disengaging the compressor. If the air gets too warm
(rises above the heat cutout setpoint), it breaks the “W” connection, de-
energizing the furnace. To prevent short cycling, the compressor or fur-
nace cannot reenergize for at least four minutes after cutout. The heat-
ing and cooling cutout setpoints can be changed by the installer.
The 101CAPGE has a three digit LED display and two push buttons.
Normally the leaving air temperature is displayed. When the push but-
tons are pressed the cut-out setpoints are displayed.
OPERATION
The 101CAPGE has three modes of operation: in range, out of range and
enable mode.
In Range
– If the leaving air temperature is between the cool and heat
cutout setpoints and the 101CAPGE is not in cutout time delay, light DL1
is off and relay K1 is made, permitting the System Controller to energize
the compressor or furnace. The leaving air temperature is displayed on
the digital display during this time.
Out of Range
– If the leaving air temperature drops below the cool
cutout setpoint or rises above the heat cutout setpoint, light DL1 is lit and
the relay contacts between Y1 Y1 and W1 W1 break, de-energizing the
compressor or furnace. Four minutes after the leaving air temperature
has returned within operating range light DL1 is turned off and the
relay contacts close, making Y1 Y1 and W1 W1 and energizing the fur-
nace or compressor. The leaving air temperature is displayed on the
digital display during this time.
Enable Mode
– On the digital display, “E” followed by the leaving air
temperature indicates that the 101CAPGE is in the Enable Mode. The
purpose of this mode is to ensure the furnace can turn on in a cold
building and the air conditioner can turn on in a hot building. Enable
Mode is entered if the leaving air temperature is below the cool cutout
setpoint or above the heat cutout setpoint for more than eight minutes.
The relay contacts are made during this mode, enabling the furnace or
air conditioner to run. After the leaving air temperature has returned
within operating range the 101CAPGE will return to normal operation,
displaying only the leaving air temperature.
The 101CAPGE consists of the following:
A.
Digital Display
– Three digit LED. Normally displays the leaving
air temperature of the HVAC unit. When “E” is displayed, it indicates
101CAPGE is in Enable mode; refer to OPERATION section. When
the UP/DN buttons are pressed, the cutout setpoints are displayed.
Refer to the Setpoint Calibration section for reading and adjusting the
setpoints.
B.
Microcontroller
– Activates and controls outputs based
upon leaving air temperature comparison with programmed set-
points. Occasionally software upgrades may become available. If
so, the 101CAPGE software can be field upgraded by changing this
microcontroller.
C.
Cut-out Indicator Lights
– DL1 light is on when relay K1 is
energized. See E.
D.
Thermometer Calibrator
– Calibrates the leaving air tempera-
ture thermometer. Turn clockwise to lower temperature. Turn coun-
terclockwise to raise. Refer to CALIBRATION section for com-
plete calibration information.
E.
Relays K1 and K2
– DPDT, NC relays. When K1 is energized, it
breaks contact between Y1 Y1 and W1 W1 terminals.
F.
Leaving Air Sensor (LAS) Terminals
– Leaving air tempera-
ture sensor is connected to the 101CAPGE here. Red to + and white
to –. The sensor monitors the leaving air of the HVAC system. If pre-
ferred, the 101CAPGE can be mounted up to 500 feet from the sen-
sor. See INSTALLATION section for further information.
R11
UP
DN
ON
OFF
DL1
TR1 TR2
+ -
Y1 Y1
W1
W1
CAPGE V3.4
961205-C
A
B
C
D
E
J
I
F
G
H
K
COMPONENTS
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