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Installer's
Guide
I. CONTROL
WIRING
1. Connect
wiring
between
indoor unit,
outdoor
unit
and thermostat.
The use of color-coded
low-voltage
wires is recommended.
2. A low voltage terminal
board is provided for control
wiring,
and is located on the left side of the cross
brace in the center of the unit.
3. Field wiring diagrams
are provided which show the
low voltage
wiring hookup
for a single speed cool-
ing only system (with supplementary
heaters)
and a
heat
pump
system
(with
supplementary
heaters).
Plug in type electrical
connectors
are provided
for
use with supplementary
heaters.
IMPORTANT:
When supplementary
heaters
are installed,
inspect
to
insure that all packaging
material has been removed.
J.
AIRFLOW ADJUSTMENT
Disconnect
power
to the air handler
before
changing
dip switch positions.
Failure to follow
this procedure
may result in equip-
ment damage.
Blower speed changes
are made on the ECM Fan Con-
trol mounted
on the control box. The ECM Fan Control
controls the variable
speed motor.
There is a bank of 8 dip switches
(See Figure
17). The
dip switches
work in pairs to match the airflow for the
outdoor
unit
size (tons),
cooling
airflow
adjustment,
Fan off-delay options, and heating
airflow adjustment.
The switches
appear as shown in Figure
18.
ECM FAN CONTROL
CFM
SELECTION
DIP
/SWITCHES
2 CFM FAN
Y
Y LO m
:
@@
U
<
=
R
W3 W2 Wl
Figure 18
Figure 17
From Dwg. 800796a
DIP SWITCHES
(AS SHIPPED)
If the airflow needs
to be increased
or decreased,
see
the Airflow Label on the air handler
or the Blower Per-
formance
Table in the Service Facts.
Information
on changing
the speed of the blower motor
for your
specific outdoor
model
size is in the Blower
Performance
Table.
Be sure
to set the
airflow
for the correct
tonnage.
Refer to blower housing
for correct setting.
Switches
1 - 4
Cooling Airflow
Switches
5 - 6
Fan Off Delay Options
Switches
7 - 8
Auxiliary Heat
If the optional humidistat
is used, remove R-BK jumper
from the low voltage terminal
board (not shown) and in-
stall the humidistat
between
R and BK. (Jumper
R to O
for cooling-only/non-heat
pump systems
with a humidis-
tat.)
INDOOR BLOWER TIMING
The FAN-OFF
period is set on the ECM Fan
Control
board by dip switches
#5 and #6. The blower off-delay
settings
are as follows:
IMPORTANT:
Leave
dip switch
5 & 6 in the "as-shipped"
position
during
system
start-up and check ouL Afterwards,
ad-
just as desired.
COOLING
OFF - DELAY OPTIONS
NOMINAL
SWITCH SETTINGS
SELECTION
AIRFLOW
5 - OFF
6 - OFF
NONE
SAME
5- ON
6- OFF
1.5 MINUTES
100%*
5- OFF
6 - ON
3 MINUTES
50%
5- ON
6- ON
ENHANCED**
50 - 100%
* - This setting is equivalent to the BAY24X045 relay benefit.
** - This ENHANCED MODE selection provides a ramping up
and ramping down of the blower speed to provide improved
comfort, quietness, and potential energy savings.
The graph
shows the ramping process.
o
o
OFF
50%
Dehumidify
Fast
Coil
Cooling
and Heating
I-1-1-
7.5
minute
minutes
o
100 '/o if necessary
_ 50%
Efficiency
_OFF
-I_ I
as required
o
minutes
[_I,] ,',I _ ;t =[-"I-"I,] ; 1[,1 d=i;_.,_d[,1 _'I [,]11
OFF
10
18-GE04D2-10
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