Rheem 97MDV060 Series - Page 71

71
INTE
GRATE
D FURNACE
CONTROL
H
U
M
I
D
I
F
I
C
A
T
I
O
N
/
D
E
H
U
M
I
D
I
F
I
C
A
T
I
O
N
C
2. WITH NON-COMMUNICATING THERMOSTAT
(REQUIRES OPTIONAL HUMIDISTAT)
For non-communicating thermostats, an optional
humidistat must be installed. Controlled humidification and
dehumidification can be accomplished using a humidistat
as shown in Figures 50 or 51. These figures show
installation of a humidifier with external and internal power
supplies respectively. Dehumidification operation will be
disabled if the dipswitch S2-8 is in the “OFF” position. If
this switch is in the “ON” position, dehumidification control
will be active.
HUMIDISTAT (24V)
(CONTACTS OPEN
WHEN HUMIDITY
IS ABOVE SET POINT)
ST-A1194-79-00
SWITCH #S2-8 MUST BE IN “ON” POSITION
(NOTE: FACTORY POSITION IS ”OFF”).
TURNING THIS SWITCH “OFF” WILL DISABLE
DEHUMIDIFICATION OPERATION WITH A
NON-COMMUNICATING THERMOSTAT
NEUTRAL OR COMMON
HUMIDIFIER WITH
E
XTERNAL 110V 04
24V POWER SUPPLY
S
PST RELAY WITH
N.O. CONTACTS
RATED 24V OR 110V
CONTACTS AS NECESSARY
FOR HUMIDIFIER
SA1
SA2 OAT1
OAT2
S
1
S2
S
3
HUM
HUM EAC
L1
NEUTRAL
1
2
R
C
HUM STAT
W1
W2
G
Y
1
Y2
B
110V OR 24V
POWER SUPPLY
AS NECESSARY
FOR HUMIDIFIER
-+
FIGURE 50
WIRING FOR OPTIONAL DE-HUMIDIFICATION AND HUMIDIFICATION (WITH OPTIONAL HUMIDISTAT AND HUMIDIFIER).
NOTE: CAN BE USED WITH COMMUNICATING OR NON-COMMUNICATING SYSTEMS.
ST-A1194-79-00
HUMIDISTAT (24V)
(CONTACTS OPEN
WHEN HUMIDITY
IS ABOVE SET POINT)
ST-A1194-80-00
SWITCH #S2-8 MUST BE IN “ON” POSITION
(NOTE: FACTORY POSITION IS ”OFF”).
TURNING THIS SWITCH “OFF” WILL DISABLE
DEHUMIDIFICATION OPERATION WITH A
NON-COMMUNICATING THERMOSTAT
NEUTRAL OR COMMON
HUMIDIFIER WITH
INTERNAL POWER
SUPPLY
SPST RELAY WITH
N.O. CONTACTS
RATED 24V OR 110V
CONTACTS AS NECESSARY
FOR HUMIDIFIER
SA1
S
A2 OAT1
OAT2
S1
S2
S3
HUM
HUM EAC
L1
NEUTRAL
1
2
R
C
HUM STAT
W1
W
2
G
Y1
Y2
B
+110V OR 24VAC
FIGURE 51
WIRING FOR OPTIONAL DE-HUMIDIFICATION AND HUMIDIFICATION (WITH OPTIONAL HUMIDIFIER) (HUMIDIFIER WITH INTERNAL
POWER SUPPLY. NOTE: FOR USE WITH NON-COMMUNICATING SYSTEMS.
ST-A1194-80-00
NEUTRAL OR
COMMON
HUMIDISTAT
(24V)
(CONTACTS
OPEN
WHEN
HUMIDITY IS
ABOVE SET
POINT)
HUMIDISTAT
(24V)
(CONTACTS
OPEN
WHEN
HUMIDITY IS
ABOVE SET
POINT)
HUMIDIFIER WITH
EXTERNAL 110V OR
24V POWER SUPPLY
HUMIDIFIER WITH
INTERNAL POWER
SUPPLY
S
WITCH #S2-8 MUST BE IN “ON”
P
OSITION (NOTE: FACTORY
P
OSITION IS “OFF”). TURNING THIS
S
WITCH “OFF” WILL DISABLE
D
EHUMIDIFICATION OPERATION
W
ITH A NON-COMMUNICATING
THERMOSTAT
SPST RELAY WITH N.O.
CONTACTS RATED 24V OR
110V CONTACTS AS NECES-
SARY FOR HUMIDIFIER
110 OR 24V POWER
SUPPLY AS NECES-
SARY FOR HUMIDIFIER
NEUTRAL OR
COMMON
+110 OR 24VAC
SWITCH #S2-8 MUST BE IN “ON”
POSITION (NOTE: FACTORY
POSITION IS “OFF”) TURNING THIS
SWITCH “OFF” WILL DISABLE
DEHUMIDIFICATION OPERATION
WITH A NON-COMMUNICATING
THERMOSTAT
SPST RELAY WITH N.O. CONTACTS
RATED 24V OR 110V CONTACTS AS
NECESSARY FOR HUMIDIFIER
Integrated Furnace Control