Operating instructions

10
FIGURE 3-4 Boiler Components 299 MBH (View from Front of Boiler)
(18) GAS SHUTOFF
VALVE
(SHOWN IN OPEN
POSITION)
(25) VENT CONNECTOR
(20) GAS (CONTROL)
VALVE
(22) LOW WATER
CUTOFF
(21) SUPPLY WATER
TEMPERATURE SENSOR &
HIGH LIMIT SWITCH
(23) SAFETY RELIEF VALVE
(28) AIR VENT
(2) COMBUSTION
AIR INLET
NOTE:
See Section 5
For Piping
Instructions
(17) HEAT EXCHANGER
PUMP
(10) CONDENSATE
COLLECTOR
(3) RETURN WATER
FROM HEATING
SYSTEM (IN)
(14) SUPPLY WATER TO
HEATING SYSTEM (OUT)
(4) LOW VOLTAGE
TERMINAL STRIP
(33) COMBUSTION
ANALYSIS TEST
PORT
(26) GAS CONNECTION
(24) HIGH VOLTAGE
JUNCTION BOX
(9) HEAT
EXCHANGER
(29) BOILER CONTROL
MODULE
Fuse and Holder
(5) FLAME
SENSOR
(16) CONDENSATE
DRAIN
(31) TRANSFORMER
(1) USER INTERFACE
(13) INTERNAL PRIMARY
LOOP BALL VALVE
(19) BLOWER
VENTURI
(35) HEAT
EXCHANGER SURFACE
TEMPERATURE SWITCH
(34) INTERNAL
PUMP RELAY
(7) SIGHT GLASS
&
(6) IGNITER
(15) VENT TEMPERATURE
SENSOR
(11) RETURN
TEMPERATURE
SENSOR
3 - COMPONENT LISTING
(36) ASME
PLATE