Dunkirk DKVLT-050 Installation, Operation & Maintenance Manual page 10

FIGURE 3-5 Boiler Components 299 MBH (View from Front of Boiler)
(28) AIR VENT
(21) SUPPLY WATER
TEMPERATURE SENSOR &
HIGH LIMIT SWITCH
(22) LOW WATER
CUTOFF
(33) COMBUSTION
ANALYSIS TEST
PORT
(34) INTERNAL
PUMP RELAY
(29) BOILER CONTROL
MODULE
Fuse and Holder
(13) INTERNAL PRIMARY
LOOP BALL VALVE
(35) HEAT
EXCHANGER SURFACE
TEMPERATURE SWITCH
(17) HEAT EXCHANGER
PUMP
(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
10
NOTE:
See Section 5
For Piping
Instructions
(2) COMBUSTION
AIR INLET
(26) GAS CONNECTION
(19) BLOWER
VENTURI
(6) FLAME SENSOR
(7) SIGHT GLASS &
(5) IGNITER
(31) TRANSFORMER
(9) HEAT
EXCHANGER
(20) GAS (CONTROL)
VALVE
(36) ASME
PLATE
(15) VENT TEMPERATURE
SENSOR
(18) GAS SHUTOFF
VALVE
(SHOWN IN OPEN
POSITION)
(11) RETURN
TEMPERATURE
SENSOR
(16) CONDENSATE
DRAIN
(3) RETURN WATER
FROM HEATING
SYSTEM (IN)