6
COMPONENT LOCATION
General layout (fig. 1)
1
Water pressure switch
2
Pump
3
Bottom auto air vent (AAV)
4
Gas injector
5
Condense trap
6
Return sensor
7
H stamp main heat exchanger
8
Main heat exchanger
9
Flue thermostat
10
Flue sensor
11
Flue gas analysis test point
12
Flue outlet & air intake
13
Blocked flue switch
14
Top automatic air vent
15
Flow sensor
16
High limit thermostat
17
Ignition transformer
18
Sensing Electrode
19
Spark Electrode
20
Top automatic air vent drain pipe
21
Condensate level sensor
22
Cylindric Burner
23
Fan assembly
24
Mixer
25
Gas modulator coil
26
Gas valve
27
Pressure relief valve
R
Boiler IN connection
F
Boiler OUT connection
G
Gas connection
P
Pressure relief valve drain
C
Condensate drain pipe
XPak 85
Fig. 1
XPak 120
G
F
R
P
G
F
R
P
C
C
