L.B. White COMBO-MCS - Manual (Page 22)

H
e
a
te
rs
s
ta
rt
b
u
t
h
e
a
t
o
u
p
tu
t
d
o
e
s
n
o
t
c
h
a
n
g
e
i
n
re
s
p
o
n
s
e
t
o
S
m
a
rt
B
o
x
™
s
e
tt
in
g
.
Ye
s
P
ro
b
le
m
7
Is the Smar
t Sense™
fo
rc
ed air gas v
alv
e or
the radiant heat
er’s
pr
opor
tional v
alv
e
receiving 1-1
5 VDC
fr
om fuse?
No
Are sensor
s
positioned
pr
operly?
Ensure all sensor
s
are locat
e
d
a
w
a
y fr
om draf
ts, air inlets,
cold spo
ts, etc.
R
a
d
ia
n
t
h
e
a
te
rs
:
Ensure the
radiant sensor brack
et is
installed and that the sensor is locat
ed pr
operly within its
housing. It should be 1/8 in.
to
3/1
6 in. fr
om the end of
and inside the sensor housing.
No
Ye
s
A
. Set the S
m
a
rt
B
o
x
™
fo
r the specif
ic heat
er t
o
a
higher t
e
m
perature (at least 1
0
F) o
v
er r
oom
te
m
perature.
B. V
erify increase in VDC t
o
gas v
alv
e.
F
o
rc
e
d
A
ir
H
e
a
te
rs
:
Measure acr
o
ss t
e
rminals at
v
alv
e t
o
obtain reading
R
a
d
ia
n
t
H
e
a
te
rs
: Loosen the pr
opor
tional gas
v
alv
e’s housing scre
w and pull back the connect
or
block suf
ficiently t
o
allo
w v
oltage met
e
r pr
obes t
o
be inser
ted at the v
alv
e t
erminals.
C. If no increase in VDC (should be 1
3-1
5 VDC) at
gas contr
o
l, then check the output at the
respectiv
e signal conditioner t
erminals:
F
o
rc
e
d
A
ir
: T
erminals 3 and 4 (br
o
w
n wires)
R
a
d
ia
n
t:
T
erminals 1
0
and 1
1
(blue wires).
If 1
3-1
5 VDC is measured at output but no
t at
v
a
lv
e, check all wiring and t
erminals betw
een
the
signal
conditioner
a
n
d
v
a
ri
a
b
le
r
a
te
v
a
lv
e
.
D. If no reading is giv
en at the output of the f
o
rc
e
d
a
ir
o
r r
a
d
ia
n
t s
ig
n
a
l c
o
n
d
it
io
n
e
r,
then
the
signal
conditioner f
o
r that zone of heat
er
s is def
ectiv
e
and must be replaced.
Ha
v
e
the v
ariable
rat
e output fuses of th
e
Smar
tBo
x
™
been check
e
d f
o
r
continuity?
No
Check the fuses. If def
ectiv
e, replace.
A
re
Smar
tBo
x
™
sensor
s
positioned t
o
the
same height as
the r
oom contr
ol
sensor
s?
R
eposition the sensor
s. R
e
fe
r
to
sensor location
instructions in this manual.
No
Ye
s
S
m
a
rt
B
o
x
™
Z
o
n
e
1
(f
o
rc
e
d
a
ir
)
d
o
e
s
n
o
t
o
p
e
ra
te
c
o
n
c
u
rr
e
n
tl
y
w
it
h
r
o
o
m
c
o
n
tr
o
ll
e
r.
P
ro
b
le
m
8
Check t
e
m
p
erature cur
v
e f
o
r
bo
th the S
m
a
rt
B
o
x
™
and the
room contr
oller
. V
e
rify the
te
m
peratures match.
22
H
e
a
te
rs
s
ta
rt
a
n
d
o
p
e
ra
te
p
ro
p
e
rl
y,
b
u
t
zo
n
e
l
ig
h
t
is
O
F
F
P
ro
b
le
m
6
Zone LED is def
ectiv
e or
poor electrical connect
on
betw
een pr
ogrammable
contr
oller and LED.
V
erify 2
4
VDC t
o
zone LED.
If present replace LED. If
absent, repair wiring
betw
een contr
oller and
LED.
Ye
s
Check f
o
r
block
ages in
gas supply