30
P/N 974-
4135
Rev: 2.51
IX800 Operation & Service Manual
1
2
3
4
5
6
7
8
9
10
NC (BURNER)
NO (FAN)
RTD
AC120V
1
2
3
4
5
6
7
8
9
10
NC (TH)
NO (FAN)
RTD
AC120V
2
1
NO
Timer
(ON after 12 min)
3
115/230V
12/24V
IX800 Ladder Diagram
L1
L2
L3
3Ø
1Ø
Power Selector
Switch
L2
L1
208/230V
1Ø
208/230V
3Ø
F1
I2
Ignition Controller
Key
Variable Frequency Drive
Relay Contacts
R
S
T
M
U
V
W
M
Blower
Motor
Burner
Motor
Burner Motor
Relay Contact
Burner Motor
Relay Coil
S1
GND
Air Pressure
Switch IN
Valve Power
OUT (24VAC)
Burner
Ground
L1
Igniter
Power IN
P.Sw
R
Igniter
Power OUT
MV1
Gas Valve Solenoids
(24VAC)
Start Switch
2
4
COM
M
Fuse T5A
Stop Switch
NO
NO
Air Pressure Sw.
F2
F1
Burner Motor
Power OUT
Burner Motor
Power IN
NC
Ignition Controller
Flame Rod
Signal
F S
Flame Rod
W
Thermostat Signal
Input (24VAC)
E
x
ternal
Thermostat
2
3
Jumper Plug
NO
Constant 24VAC
2
COM
Ignition
Transformer
Igniter
Switching 24VAC
Supply
(24VAC)
Fu
se
40
A
x
3
Fu
se
70
A
x
2
t
o
Fan
Preheat Thermostat
(close above 35°F)
Fan Thermostat
(close above 85°F)
230V
Power
Transformer
VFD
Relay Coil
Preheat
Relay Coil 1
NO
NO
NC
NO
Preheat
Standby Lamp
NO
NC
Power ON Lamp
(Start Button)
X1
X2
Power Logic
Relay Coil
0
1
24V
t
o
Preheating
Element 230V
(2 PCS)
230V
115V
230V
P1
Top Fan-E
x
changer
RTD Controller
7
11
9
5
12
8
12
4
12 4
10
6
CM
0°C
30°C
Preheat
Relay Coil 2
Output Limit
Switch (resetable)
NC
Fuse
T3.5A
Tilt Switch
IX800 Rev 2.5
09/08/2021
S
id
e
R
TD
Side Fan-E
x
changer
RTD Controller
To
p
R
TD
COM
M
IX800 Ladder Diagram