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A6 ENTHALPY CONTROLLER
A
B
C
D
Open
Min
Pos
Free
Cool
DCV
EXH
EXH
Set
2V 10V
DCV
Max
2V 10V
DCV
Set
2V 10V
ADJUST POWER
EXHAUST FAN
SETPOINT
ENERGIZED WHEN
DAMPER POSITION
IS HIGHER THAN
EXHAUST FAN
SETPOINT
FIGURE 30
H-Control Systems
the rooftop unit. Default operation requires a standard
can also control the unit from a zone temperature sensor.
-
sychained to the L Connection
®
Network Control System.
PC with Unit Controller PC software installed.
when excessive condensate collects in the drain pan. The
-
Controller has a three-strike counter before the unit locks
switch to open three times per thermostat demand. If the
unit locks out, a reset of the Unit Controller is required af-
ter the switch has closed to restore unit operation.
J-Smoke Detectors A17 and A64
Photoelectric smoke detectors are a factory installed op-
tion. The smoke detectors can be installed in the supply
supply and return air section. Wiring for the smoke detec-
wiring diagram in back of this manual.
K-LP / Propane Kit
Units require a natural to LP /propane kit. The kit includes
and three stickers. For more detail refer to the natural to
LP gas changeover kit installation instructions.
L-Optional Cold Weather Kit (Canada only)
Electric heater is available to automatically control the
minimum temperature in the gas burner compartment.
1 -
transformer mounted in the blower compartment.
2 -
3 -
possible to the gas valve. It is wired in series with
4 - A thermostat mounting box is installed on the
vestibule of the heating compartment. Included in
a.
N.C. switch which opens on a temperature drop.
The switch is wired in series with 24v power
and the combustion air blower switch. When
the switch opens and the gas heat section is
deenergized. The switch automatically resets
when the heating compartment temperature
b.
N.C. switch which opens on a temperature rise.
The sitch is wired in series with HR6 and T20.
the switch opens and the electric heater is de-
energized. The switch automatically resets when
the heating compartment temperature reaches
c.
N.O. switch which closes on a temperature drop.
The switch is wired in series with HR6 and T20.
switch closes and electric heater is energized.
The switch automatically opens when heating
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