Dunkirk DKVLT-050 Installation, Operation & Maintenance Manual page 9

FIGURE 3-4 Boiler Components 50/75/100 MBH (View from Front of Boiler) As seen on front cover
(28) AIR VENT
(21) SUPPLY WATER
TEMPERATURE SENSOR
& HIGH LIMIT SWITCH
(22) LOW
F
WATER CUTOF
(13) INTERNAL PRIMARY
LOOP BALL VALVE
(20) GAS (CONTROL)
VALVE
(19) COMBUSTION
AIR
BLOWER
(18) GAS SHUTOFF
VALVE
(SHOWN IN OPEN
POSITION)
(35) HEAT EXCHANGER
SURFACE TEMPERATURE
SWITCH
(17) HEAT EXCHANGER
PUMP
(15) VENT
TEMPERATURE
SENSOR
(33) COMBUSTION
ANALYSIS TEST
PORT
(10) CONDENSATE
COLLECTOR
(4) LOW VOLTAGE
TERMINAL STRIP
(24) HIGH VOLTAGE
JUNCTION BOX
(14) SUPPLY WATER TO
HEATING SYSTEM (OUT)
3 - COMPONENT LISTING
(23) SAFETY RELIEF VALVE
(25) VENT CONNECTOR
9
NOTE:
See Section 5
For Piping
Instructions
(2) COMBUSTION
AIR INLET
(26) GAS CONNECTION
(5) IGNITER
(6) FLAME
SENSOR
(7) SIGHT GLASS
(32) FLUE
AIR MIXTURE
PRESSURE
TEST PORT
(29) BOILER
CONTROL
MODULE
Fuse and
Holder
(36) ASME
PLATE
(9) HEAT
EXCHANGER
(31) TRANSFORMER
(11) RETURN WATER
TEMPERATURE SENSOR
(16) CONDENSATE
DRAIN
(3) RETURN WATER
FROM HEATING
SYSTEM (IN)