Lennox International Inc. 505 - Manual (Page 9)

Page 9
EDA INSTALLATION/ SERVICE INSTRUCTIONS
Insulating and Sealing the Unit
IMPORTANT
All piping, metering devices, and connections must
be insulated to prevent moisture damage caused by
sweating.
Seal the unit so that warm air is not allowed into the cabi-
net. This is especially important when the unit is installed in
an unconditioned area. Make sure the liquid line entry
points are sealed with either refrigerant tube insulating ma-
terial or with Permagum (see figure 5 on page 7).
Other System Components
Blower Control
EDA units are to be applied with an indoor unit that has a
variable speed motor (VSM). Refer to the indoor unit instal-
lation instruction for setting blower speed.
Thermostat and Sensor
IMPORTANT
A SignatureStat
t thermostat and properly-
connected outdoor sensor is REQUIRED for the
EDA unit to function properly. Twisted pair wire
(84X49 or equivalent) is REQUIRED between the
SignatureStat and the outdoor sensor.
Install the remote sensor on the outside of a northern wall
of the home, away from direct sunlight or other heat
sources that may affect its sensitivity.
Refer to the SignatureStat t thermostat Installation
Instructions for installation, wiring, and setup. Also refer to
the SignatureStat
t Thermostat Programming Guide for
programming and settings.
To configure the thermostat for operation with a Humidi-
trol
® system, first enable HUMIDITROL in the thermostat’s
installer settings (follow the path: MENU −> INSTALLER
SETTINGS −> HUMIDITROL − see figure 8, A and B).
Then, select HUMIDITROL mode from the DEHUMIDIFY
menu (follow the path: MENU −> DEHUMIDIFY). The user
control sequence is also shown in figure 8, C through H;
specifically:
S
Turn on Humiditrol − D & E
S
Set level of dehumidification − F through H (adjustment
range is from 45% to 60% and is factory set to 50%)
If HUMIDITROL is enabled and the outdoor sensor is dis-
connected, operation is NOT allowed in dehumidification
mode. This is indicated by the display of "OUTSIDE ERR"
on the SignatureStat
t thermostat Home screen.
Figure 8
Setting Thermostat
INSTALLER SETTINGS Y
AUTO CHANGEOVER ON
EER ON
DEADBAND 4.0°F
HUMIDITROL OFF
MAIN MENU SELECT B
HUMIDITROL
DISABLE
ENABLE
INSTALL MENU SELECT
MAIN MENU
PROGRAM
HEAT / COOL
HUMIDIFY
↓
DEHUMIDIFY
HOME SELECT
DEHUMIDIFY MENU
MODE OFF
DEHUMIDIFY 50%
MAIN MENU SELECT
DEHUMIDIFY
CONTROL
↑
↓
DEHUM MENU SELECT
% 50
Installer Setup
User Controls
DEHUMIDIFY MODE
OFF
HUMIDITROL
DEHUM MENU SELECT
DEHUMIDIFY MENU
MODE HUMIDITROL
DEHUMIDIFY 50%
MAIN MENU SELECT
DEHUMIDIFY MENU
MODE HUMIDITROL
DEHUMIDIFY 55%
MAIN MENU SELECT
A B
C D
E F
G H