TWO ZONE – PRIMARy AND SECONDARy ZONED INSTAllATION
(CONTINUED)
fIGURE 18 – Two Zone Wiring
90-1537
DAM
PER
S
Rf
DH
-
W
Gh
Gs
Cf
VEN
T
HV
AC
EQUI
PR
EM
OT
E
DEH
B+
A
G
R
C
G
W
Y
Y
W
C
R
SENSO
R
OD
T
FL
OA
T
SWIT
CH
24 VAC
(40 VA min)
TRANSFORMER
DEHUMIDIFIER
CONTROL BOARD
HVAC EQUIPMENT
THERMOSTAT
DEHUMIDIFIER SYSTEM DAMPERS
NORMALLY OPEN
(SECONDARY ZONE)
NORMALLY CLOSED
(PRIMARY ZONE)
• HVAC FAN ON: In the HVAC ON position, the HVAC fan will be turned on only when dehumidifying the Primary Zone. Activating the HVAC
fan during dehumidification provides better circulation and balancing of indoor air conditions but does not affect moisture removal efficiency .
During Secondary Zone dehumidification, the HVAC fan will not be turned on regardless of the switch position . If the switch is put in the HVAC
FAN OFF position, air is pulled through the unit, dehumidified, and circulated solely by the dehumidifier blower .
• CYCLE PERIOD: This determines how frequently the dehumidifier will sample the air to check the humidity level. Set to 1 hour and adjust as
needed .
• For Ventilation switch settings, see VENTILATION section beginning on page 14.
• LOCAL/EXTERNAL: If using a Model 76 External Control, Model 8910 Home Comfort Control
™
, or other Third-Party Control, place the switch in
the EXTERNAL position. If not using an external control, leave the switch in the LOCAL position.
IMPORTANT: The external control must
be installed in the Primary Zone.
See page 19 for Model 76 External Control wiring or page 21 for Model 8910 Home Comfort Control
™
or
Third-Party Control wiring .
fIGURE 19 – Two Zone DIP Switch Settings
90-1538
ON
1234
4
3
2
1
ON
HVAC FAN OFF
PRIMARY
VENT-AUTO
VENT-TIMED
HVAC FAN ON
2 HOUR
3 HOUR
30 MIN.
1 HOUR
SYSTEM SETUP
CYCLE PERIOD
EXTERNAL
PRIMARY/SECONDARY
LOCAL
MIN.
30
MIN
MIN.
60
0
CYCLE TIME
TEST
OFF
WIRING & DIP SWITCH CONfIGURATION
12
