Manual
2100-483E
Page
37 of 59
30. SEQUENCE OF OPERATION –
HEATING
On a call for heat from the thermostat, the induced draft
blower is energized. Once sufficient draft is
established, the pressure switch contacts close and the
ignition system is energized. The direct spark ignitor
will be energized allowing gas to flow. At the same
time the main valve is energized, a 30-second blower
delay timer is activated.
After this delay, the heating speed blower relay
energizes. The blower will begin operating and remain
in operation until the set delay time after the call for
heat has been satisfied. This timing sequence
guarantees blower on, blower off operation.
This unit is equipped with a flame roll-out switch,
which is wired in series with the control circuit. This is
a manual reset switch and is used for the purpose of
preventing possible fire hazard in the event of a system
malfunction. If this switch has opened the control
circuit, there could be a possible system malfunction.
Some of the conditions that might cause a roll-out to
occur are blockage or sooting of primary heat
exchanger, overfiring of furnace due to improper main
burner orifices or incorrect manifold pressure,
insufficient combustion air, or installation deficiencies
with respect to return air duct design or sizing.
Once the problem has been resolved, reset the switch by
pressing down on the reset button on top of the switch.
See Figure 16 for additional information.
31. SEQUENCE OF OPERATION –
COOLING
NON-ECONOMIZER
Stage 1 (Y1) cooling call activates Step 1 (partial
capacity, 66%) of compressor capacity.
Stage 2 (Y2) cooling call activates Step 2 (full capacity,
100%) of compressor capacity.
WITH ECONOMIZER
Stage 1 (Y1) cooling call goes to economizer controls
for decision:
- If Enthalpy Control decides outdoor conditions
are suitable for free cooling, the economizer will
operate.
• If Stage 2 cooling call is issued during
economizer operation, the economizer will
close and the compressor will go straight to
Step 2 full capacity operation.
- If Enthalpy Control decides outdoor conditions
are not suitable for free cooling, the economizer
will not operate (or close) and Step 1 of the
compressor will operate.
• If Stage 2 cooling call is issued, the
compressor will shift to Step 2 full cooling
capacity operation.
FIGURE 16
SEQUENCE OF OPERATION
ELECTRONIC BLOWER CONTROL
N
O
I
T
C
A
E
S
N
O
P
S
E
R
M
E
T
S
Y
S
.
t
a
e
h
r
o
f
s
ll
a
c
t
a
t
s
o
m
r
e
h
T
)
.
d
e
z
i
g
r
e
n
e
s
i
l
a
n
i
m
r
e
t
W
(
•
•
•
•
•
.
d
e
z
i
g
r
e
n
e
s
i
r
e
w
o
l
b
r
i
a
n
o
i
t
s
u
b
m
o
C
.
d
e
h
s
il
b
a
t
s
e
s
i
w
o
l
f
r
i
A
.
s
e
k
a
m
h
c
t
i
w
s
g
n
i
v
o
r
p
r
i
A
.
d
e
z
i
g
r
e
n
e
s
i
m
e
t
s
y
s
n
o
i
t
i
n
g
I
.
s
t
h
g
il
r
e
n
r
u
b
n
i
a
m
d
n
a
s
n
e
p
o
e
v
l
a
v
s
a
G
s
i
n
a
f
g
n
i
t
a
l
u
c
r
i
c
e
h
t
,
e
t
e
l
p
m
o
c
s
i
g
n
i
m
i
t
n
e
h
W
.
s
n
i
g
e
b
g
n
i
m
i
t
y
a
l
e
d
n
o
n
a
f
t
a
e
H
.
d
e
e
p
s
t
a
e
h
t
a
d
e
z
i
g
r
e
n
e
.
t
a
e
h
r
o
f
ll
a
c
s
d
n
e
t
a
t
s
o
m
r
e
h
T
•
•
•
.
s
e
s
o
l
c
e
v
l
a
v
s
a
g
d
n
a
d
e
z
i
g
r
e
n
e
-
e
d
s
i
m
e
t
s
y
s
n
o
i
t
i
n
g
I
.
g
n
i
m
i
t
e
g
r
u
p
t
s
o
p
r
e
t
f
a
d
e
z
i
g
r
e
n
e
-
e
d
s
i
r
e
w
o
l
b
r
i
a
n
o
i
t
s
u
b
m
o
C
s
i
n
a
f
g
n
i
t
a
l
u
c
r
i
c
e
h
t
,
e
t
e
l
p
m
o
c
s
i
g
n
i
m
i
t
n
e
h
W
.
s
n
i
g
e
b
g
n
i
m
i
t
y
a
l
e
d
f
f
o
n
a
f
t
a
e
H
.
d
e
z
i
g
r
e
n
e
-
e
d
.
l
o
o
c
r
o
f
ll
a
c
s
n
i
g
e
b
t
a
t
s
o
m
r
e
h
T
)
.
d
e
z
i
g
r
e
n
e
-
e
r
s
l
a
n
i
m
r
e
t
Y
d
n
a
G
(
•
•
.
d
e
z
i
g
r
e
n
e
s
i
r
o
t
c
a
t
n
o
c
g
n
il
o
o
C
.
g
n
i
m
i
t
y
a
l
e
d
n
o
n
a
f
l
o
o
c
r
e
t
f
a
d
e
e
p
s
l
o
o
c
n
o
d
e
z
i
g
r
e
n
e
s
i
n
a
f
g
n
i
t
a
l
u
c
r
i
C
.
n
a
f
r
o
f
ll
a
c
s
n
i
g
e
b
t
a
t
s
o
m
r
e
h
T
)
.
d
e
z
i
g
r
e
n
e
-
e
d
s
i
l
a
n
i
m
r
e
t
G
(
•
d
e
z
i
g
r
e
n
e
-
e
d
s
i
n
a
f
g
n
i
t
a
l
u
c
r
i
C
.
s
n
e
p
o
)
t
u
o
ll
o
r
e
m
a
l
f
(
t
i
m
i
L
•
•
.
s
e
s
o
l
c
e
v
l
a
v
s
a
g
d
n
a
d
e
z
i
g
r
e
n
e
-
e
d
e
r
a
m
e
t
s
y
s
n
o
i
t
i
n
g
i
d
n
a
t
a
t
s
o
m
r
e
h
T
n
a
r
e
w
o
l
b
r
i
a
n
o
i
t
s
u
b
m
o
C
d
.
d
e
z
i
g
r
e
n
e
e
r
a
d
e
e
p
s
t
a
e
h
n
a
f
g
n
i
t
a
l
u
c
r
i
c
t
u
o
ll
o
r
e
m
a
l
f
r
o
)
t
e
s
e
r
o
t
u
a
(
t
i
m
i
L
.
d
e
s
o
l
c
t
i
u
c
r
i
c
)
t
e
s
e
r
l
a
u
n
a
m
(
•
•
•
.
g
n
i
m
i
t
e
g
r
u
p
t
s
o
p
r
o
f
d
e
z
i
g
r
e
n
e
s
n
i
a
m
e
r
r
e
w
o
l
b
r
i
a
n
o
i
t
s
u
b
m
o
C
.
g
n
i
m
i
t
f
f
o
y
a
l
e
d
d
e
t
c
e
l
e
s
e
h
t
r
o
f
d
e
z
i
g
r
e
n
e
s
n
i
a
m
e
r
n
a
f
n
o
i
t
a
l
u
c
r
i
c
e
h
T
.
s
e
m
u
s
e
r
n
o
i
t
a
r
e
p
o
l
a
m
r
o
N
Summary of Contents for WG3S1-A
Page 11: ...Manual 2100 483E Page 11 of 59 FIGURE 2A MOUNTING INSTRUCTIONS FOR WG3S1 ...
Page 12: ...Manual 2100 483E Page 12 of 59 FIGURE 2B MOUNTING INSTRUCTIONS FOR WG4S1 AND WG5S1 ...
Page 15: ...Manual 2100 483E Page 15 of 59 FIGURE 6 COMMON WALL MOUNTING INSTALLATIONS ...
Page 25: ...Manual 2100 483E Page 25 of 59 FIGURE 11 GAS PIPE CONNECTION ...