HELIX VX-399 Installation, Operation & Maintanance Manual page 9

FIGURE 3-3 Boiler Components 399 MBH (View from Front of Boiler) As seen on front cover
1
Combustion Air Inlet
Combustion Air
41
Test Port
2
Vent Connector
Flue Gas Test Port
40
3
Gas Supply
4
Return Water From
Heating System
5
Gas Shutoff
23 Optional Air Filter
Gas (Control) Valve
6
(Behind Air Filter)
Igniter
7
8
Flame Sensor
High Voltage Junction
9
Box
10
10 AMP Breaker
11 Low Voltage Terminal
Strip
12
Wire Knockouts
13
Boiler Control Module
Fuse and Holder
W/ Spare Fuse
Spare Fuse
39
15
Vent Temperature
Sensor
Condensate Drain
16
Connection
Drain Valve
17
18 Condensate Trap
3 - COMPONENT LISTING
Controls Tree
19
9
Supply Water To
21
Heating System
Limit Control 22
(Optional)
Safety Relief Valve
37
(Rear)
Temperature Pressure
24
Gauge
Low Water Cutoff
20
25
User Interface
Supply Temperature 26
Sensor
Combustion Air Blower
28
Sight Glass
Heat Exchanger Strap
and Buckle (2)
30
Transformer
31
DHW Pump, General
Boiler Pump, CH Pump
and Blower Relays
Heat Exchanger
32
ASME Plate
33
Flue Collector 34
Alternate Condensate
Drain Connection
35
Return Water
Temperature Sensor
Alternate Condensate
Trap
36
Leveling Feet (4)
P/N 240010943, Rev. C [09/07/2016]
27
29
16
18