69
INTE
GRATE
D FURNACE
CONTROL
2.) The humidistat must determine that there is a need for
humidification.
Note: Dipswitch S2-8 (labeled “ODD”) enables(“ON”) or
disables (“OFF”) de-humidification operation.
However, it has no effect on humidification operation. If
this switch is set to the “ON” position and no humidistat is
installed, the cooling airflow will be reduced by
approximately 15% giving less than optimal performance
and possibly causing problems. It is not recommended to
leave this switch in the “ON” position without a humidistat
installed. Control of dehumidification in cooling and/or
humidification in heating can be done with a variety of
methods depending on whether there is a communicating
thermostat or a humidistat available and depending on the
type of operation desired.
With systems configured with communicating thermostats
and condensers, dehumidification is controlled by the
thermostat and is not affected by the position of dipswitch
SW2-1 or the voltage at the thermostat input T2 labeled
“HUM STAT” on the furnace. To determine which wiring
diagram and method to use, select from the following
configurations:
A. HUMIDIFICATION CONTROL ONLY WITH NO
DEHUMIDIFICATION (REQUIRES OPTIONAL
HUMIDIFIER).
A1. WITH COMMUNICATING THERMOSTAT
Humidifier control is included with EcoNet control center.
To wire the furnace for humidification control using an
EcoNet communicating thermostat, refer to the wiring
diagram in Figure 49 Option A. Be sure not to install the
jumper between “R” and “HUMSTAT” on the furnace
control. Installing this jumper will operate the humidifier
any time there is a heat call. Without the jumper, the
humidification call from the thermostat must be active and
a heat call must be present with the blower running.
A2. WITH NON-COMMUNICATING THERMOSTAT
A2-1 CONTINUOUS HUMIDIFIER OPERATION DURING
HEATING.
For continuous humidifier operation during heating, refer
to Figure 49 Option B and make sure to install the jumper
between the thermostat terminals labeled “R” and “HUM
STAT”. A separate humidistat is not required for this
configuration and the humidifier will turn on whenever
there is a call for heat and the blower is running.
FI
G
URE
4
5
E
L
E
CT
RO
NI
C
A
I
R
CL
E
A
NE
R
A
N
D
H
U
M
I
D
I
FI
ER
TER
M
I
N
ALS
A
n
o
p
tio
n
a
l 2
4V
A
C
h
u
mid
i
sta
t ca
n
b
e in
sta
lle
d
a
s
sh
o
wn
in
Fig
u
re
s 4
6
th
ru
4
9
.
With
th
e
o
p
tio
n
a
l
hum
idi
s
t
at
,
t
w
o se
parat
e condi
t
i
ons
m
ust
be
m
et
bef
or
e
h
u
mid
if
ic
a
t
io
n
c
a
n
b
e
g
in
1
).
T
h
e
re
mu
st
b
e
a
ca
ll
for heatand
the
blower
must
be
engaged
and
2.)
The hum
id
ista
tmu
st d
e
te
rmin
e
th
a
t th
e
re
is a
n
e
e
d
fo
r
hum
i
di
f
i
c
ati
on.
Note: Dip
switch S2-8 (lab
e
l
e
d “O
DD”) e
nable
s(“O
N”)
or disable
s (“OFF”) de
-hu
midification o
peratio
n.
However, it
has
no
effect
on
humidification ope
ration.
If this switch is set to the “ON” position and no
humidistat is installe
d, the cooli
ng airflo
w will be
permanentlyredu
ced by approximately 15% giving less
than optimal performance and possibly causing probl
ems.It is not recom
mended to leave this swit
ch in
the“O
N” p
osition
witho
ut
a
humidi
stat installed.
Co
ntrol of dehumidification in
cooli
ng and/o
r
humidification
in heating
ca
n be don
e with a variet
y of methodsde
pending o
n whether there is a
communicati
ngthermo
stat
or
a
humidistat avail
able a
nd dep
endin
g
onthe type of operatio
n de
sire
d.
W
ith
sy
ste
m
s
configu
r
ed
w
ith
communicating therm
o
statsand
con
d
ensers, dehu
midification i
s controll
ed
by
the
thermo
stat
and
is n
ot
affected by the position
ofdipswitch SW2-1 o
r the
voltage at the thermostat
inputT2 lab
el
ed “H
U
M ST
AT
” on the furnace. To
dete
rmine
which
wiring dia
gra
m and metho
d to use,
select fromthe followin
g configurations:
A. HUMIDIFICATION CONTROL ONLY WITH NODEHUMIDIFICATION (REQUIRES OPTIONAL
HUMIDIFIER).
A1. WITH CO
MMUNICATI
NG THERMOSTAT
Humidifier control is in
clud
ed with Eco
Netcomm
unicating thermostats. To wire the furna
cefor
humidification control u
sing anEcoNet communicating thermostat, refer tothe wiring diagram in Figure 4
6.
Be sure notto install the jumper between “R” and “H
UMSTAT” on the furnace control. Installi
ng this
FIGURE 48
E
LECTRONIC AIR CLEANER AND HUMIDIFIER TERMINALS
ST
-
A1
1
9
4-
7
7
-
00
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
Integrated Furnace Control
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