Table of Contents
Advertisement
TRANSFORMER CONTAINS A MANUAL
RESET OVERCURRENT PROTECTOR
IT WILL NOT AUTOMATICALLY RESET
DISCONNECT POWER AND INSTALL
LOCKOUT TAG PRIOR TO SERVICING
THIS COMPARTMENT MUST BE CLOSED
EXCEPT WHEN SERVICING
Fig. 19—Transformer Label
9 PIN CONNECTOR
ICM PRINTED CIRCUIT BOARD
SEC1
SEC2
TM
EASY SELECT
AUX HEAT KW/CFM
0-30
0-20
0-10
0-5
1075
875
725
625
A
VIO
AC/HP SIZE
036
030
024
018
B
BLU
SYSTEM TYPE
AC
HP-COMFORT
HP-EFF
C
ORN
AC/HP CFM ADJUST
NOM
LO
HI
D
BLK
ON/OFF DELAY
0
30
0
ENH
90
90
0
E
WHT
CONTINUOUS FAN
LO
MED
HI
YEL
F
YEL
HEATER/MOTOR
12 PIN CONNECTOR
Fig. 20—Detail of SPP Printed-Circuit Board
(3.) SYSTEM
TYPE-Select
COMFORT (for heat pump system) or AC (for air
conditioner system).
(4.) AC/HP CFM ADJUST-Select NOM (Lo for 060).
(5.) ON/OFF DELAY-Select ENH profile.
(6.) CONTINUOUS FAN-Select desired fan speed
when thermostat is set to continuous fan.
(7.) DEHUMIDIFY MODE-Remove J1 jumper to acti-
vate.
(8.) LOW VOLTAGE CONNECTIONS-Make connec-
tions as shown in ELECTRICAL CONNECTIONS
section.
(9.) CONFIGURE THERMIDISTAT™ (or capable zon-
ing system)-Following its installation instructions
for Super Dehumidify and Super Comfort Heat
operation.
This configuration provides the following comfort en-
hancements:
(a.) A 30 sec blower on delay with 150 sec at 70
percent airflow to allow the indoor coil to warm
up or cool down before the blower is asked to
C99058
J1
D
H
R
W
1
W
2
Y
1
Y/Y
2
G
J2
O
C
AUX1
HUM1
AUX2
HUM2
24VAC
GRY
C01033
system
type
HP-
(b.) A no blower off delay eliminates cold blow
(c.) Lower airflow while the compressor is running
ACCESSORY INSTALLATION
a. ACCESSORY ELECTRIC HEATERS
Electric heaters may be installed with the 604B units per
instructions supplied with electric heater package. See
unit rating plate for factory-approved electric heater kits.
b. AUXILIARY TERMINALS
The AUX and HUM terminals on the Easy Select™
Board are tied directly to the G terminal, and provide a
24-v. signal whenever the G terminal is energized (See
Fig. 20). During Super dehumidify mode, the G signal is
not present and the auxiliary terminals are not energized.
If the installation includes the use of the operating mode,
do not use these terminals to control accessories. See
Electronic Air Cleaner and Humidifier sections for
further information.
c. ELECTRONIC AIR CLEANER CONNECTIONS
The AUX1 and AUX2 terminals are not always ener-
gized during blower operations, as described above.
When using an electronic air cleaner with the unit, use
Airflow Sensor (See Air Cleaner Price Pages for part
number). The airflow sensor turns on electronic air
cleaner when the blower is operating.
d. HUMIDIFIER/HUMIDISTAT CONNECTIONS
Easy Select™ Board terminals HUM1 and HUM2 are
provided for direct connection to the low-voltage control
of a humidifier through a standard humidistat (See Fig.
20–22). These terminals are energized with 24-v. when
G thermostat signal is present. (See Fig. 20–22). Alter-
nately, the 24-v. signal may be sourced from the W and
C circuit board connections. When using a Thermidis-
tat™ Control, Zone Comfort Plus or Comfort Zone II,
the 24-v. signal may be sourced directly from the
Thermidistat™ HUM terminal.
HUM 1
(C)
24-VAC
HUM 2
(G)
Fig. 21—Humidifier Wiring for 604B
e. DEHUMIDIFY CAPABILITY WITH STANDARD
HUMIDISTAT CONNECTION
Latent capacities for these units are better than average
systems. If increased latent capacity is an application
requirement, the circuit board provides connection ter-
minals for use of a standard humidistat. The unit will
detect the humidistat contacts opening on increasing
—16—
deliver 100 percent airflow reducing the cold
blow sensation at start up in heating and allow-
ing the indoor coil to more quickly reach wet
coil operating conditions in cooling.
which may be associated with running the
blower after shut down of the compressor and
avoids re-evaporation of condensed moisture
after cooling/dehumidifying operation.
to reduce draft effects and increase heating air
temperature and improved humidity control
during cooling operation.
HUMIDISTAT
TO HUMIDIFIER
HUMIDIFIER WIRING
A95317
Advertisement
Table of Contents
