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AH-Elite Control Operations Manual
N
H
ORMAL
EATING OR
In Automatic Mode, heating and cooling are supplied as required. If cooling is required, the system will start a cooling cycle
when the cabin temperature exceeds the set point by 2°F (1.1°C) and will continue to cool until the temperature equals the set
point. (See "P-23: Set Point Temperature Differential" on page 9 for instructions on how to reduce this variation to 1°F [0.55°C].)
The cabin temperature must drop below the set point by at least 4°F (2.2°C) in order for the system to switch from cooling to
heating. Similarly, if heating is required, the system will start a heating cycle when the cabin temperature is below the set point
by 2°F (1.1°C) and will continue to heat until the temperature equals the set point. The cabin temperature must exceed the set
point by at least 4°F (2.2°C) in order for the system to switch from heating to cooling.
If you select Cool Mode, only cooling is supplied. If you select Heat Mode, only heating is supplied. The cabin temperature in
either mode is maintained within 2°F (1.1°C) of set point by default. (See "P-23: Set Point Temperature Differential" on page 9
for instructions on how to reduce this variation to 1°F [0.55°C].) When the heating or cooling set point is satisfied, the hydronic
water valve closes and the fan returns to low speed. The fan speed remains constant if Manual Fan Speed is selected.
For more information on this feature, see "Modes of Operation" on page 5.
When cooling or heating is required, the water valve will not open unless the water temperature is adequate. You can view
the water temperature by simultaneously pressing the Power and Down buttons. The fan remains in low speed until the
adequate water temperature is available. Heat will be supplied when no heating is available only if the Optional Electric heater
has been installed and programmed.
Adequate cooling or heating water temperature is defined by programmable parameter P-16. Its factory default is set at 15°F
(8.3°C) differential from the ambient air temperature.
INSTALLING THE DISPLAY PANEL
C
HOOSING THE
Before mounting the control panel, consider the location. The display panel's built-in air sensor provides excellent room-air
temperature sensing when properly located and installed. For air sensor location see item 2 in Figure 1, page 2.
Mount the display panel on an inside wall, slightly higher than mid-height of the cabin, in a location with freely circulating air
where it can best sense average temperature. Its distance from the air conditioner must be within the 15' (4.5m) length of the
display cable (custom lengths available).
Do not mount the display in direct sunlight, near any heat-producing appliances or in a bulkhead where temperatures radiating
from behind the panel may affect performance. Do not mount the display in the supply-air stream. Do not mount the display
above or below a supply-air or return-air grille. Do not mount the display behind a door, in a corner, under a stairwell or any
place where there is no freely circulating air.
If you can not mount the display in a suitable location for accurately sensing room temperature, install the optional remote air
sensor.
IMPORTANT
The system's air sensor is located in the control's display panel, therefore the display MUST be located on an interior
wall at eye level. It must NOT be located in direct sunlight or inside a cabinet.
If these conditions cannot be met, you must purchase the Optional Remote Air Sensor and install it in the return-air
stream.
M
OUNTING THE
1.
Make the cut-out for the display panel. Cut-out size is 3-5/16" (8.41cm) wide by 2-3/16" (5.56cm) high.
2.
Plug one end of the display cable (8-pin connector) into the upper-right socket on the circuit board in the electric box
and the other end into the back of the display panel.
3.
Secure the display panel to the bulkhead using the four screws provided. Do not use a screw gun and do not over-
tighten screws when mounting, because either method may damage the display.
4.
When the display is securely mounted, mount the bezel over the display frame until it snaps into place.
M
OUNTING THE
NOTE
Do not staple any sensor cables when mounting.
L-2229 ENGLISH
C
OOLING
L
OCATION
D
ISPLAY
O
S
PTIONAL
ENSORS
C
YCLE
Normal Heating or Cooling Cycle
3
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