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Component Listing - Refer to diagrams on
3.1
following pages.
1.
User Interface
Displays information regarding boiler
condition. Allows adjustment of boiler operating
parameters. NOTE: Does not replace thermostat used to
control central heating space.
2.
Combustion Air Inlet (2"/3") See sect
3.
Return Water From Heating System (In) Connection
supplied at bottom of boiler. See section 5.
4.
Low Voltage Terminal Strip
Low Voltage Terminal Strip
wiring, including thermostat.
5.
Igniter
6.
Flame Sensor
7.
Sight Glass permits observation of burner flame.
8.
Burner (see page 43)
9.
Heat Exchanger
10.
Condensate Collector
11.
Return Water Temperature Sensor
12.
Drain Valve (see page 16)
13.
Internal Primary Loop Ball Valve
14.
Supply Water Outlet to Heating System (Out)
Connections supplied for connecting from bottom of
boiler. See section 5.
15.
Vent Temperature Sensor
16.
Condensate Drain Boiler produces a liquid
(condensate) as a by-product of combustion. Condensate
must be piped to appropriate drain. See section 6.
17.
Heat Exchanger Pump
Heat Exchanger Pump
18.
Gas Shutoff Valve Fuel supply isolation during servicing.
Gas Shutoff Valve
Fuel supply isolation during servicing.
See section 7
See section 7
19.
Combustion Air Blower Delivers proper quantity of
Combustion Air Blower
combustion air, receives fuel from gas valve, mixes air
combustion air, receives fuel from gas valve, mixes air
and fuel sending mixture to burner for combustion.
and fuel sending mixture to burner for combustion.
20.
Gas (Control) Valve Delivers
Gas (Control) Valve
Combustion Air Blower. See section 7.
Combustion Air Blower. See section 7.
3 - COMPONENT LISTING
ion 6.
Connection of all low voltage
Connection
Delivers proper quantity of
Delivers proper quantity of fuel to
proper quantity of fuel to
21.
Supply Water Temperature Sensor and High Limit
Supply Water Temperature Sensor and High Limit
Switch
Switch
22.
Low Water Cutoff Senses inadequate quantity of
Low Water Cutoff
water. Turns off boiler before damage can occur.
water. Turns off boiler before damage can occur.
23.
Safety Relief Valve Factory supplied, Field installed. See
section 5.
24.
High Voltage Junction Box For connection of 120V
components. See section 8 8 .
25.
Vent Connector See section 6.
26.
Gas Connection See section 7.
Gas Connection
See section 7.
27.
Wall Hanging Support Bracket (see page 13) Integral
to boiler. Allows wall mounting when used with
supplied wall mounting bracket. See section 4.
28.
Air Vent
29.
Boiler Control Module
Boiler Control Module
30.
Transformer Supplies 24V power to low water cutoff.
31.
Flue Air Mixture Pressure Test Port - Not available on all
models
.
32.
Combustion Analysis Test Port
33.
Internal Pump Relay - N
34.
Heat Exchanger Surface Temperature Switch
35.
ASME Plate
8
Senses inadequate quantity of
ot available on all models
PN 240011320 Rev. G 10/01/2021]
.
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