Operating instructions

9
FIGURE 3-3 Boiler Components 50/75/100 MBH (View from Front of Boiler) As seen on front cover
(18) GAS SHUTOFF
VALVE
(SHOWN IN OPEN
POSITION)
(25) VENT CONNECTOR
(19) COMBUSTION
AIR
BLOWER
(20) GAS (CONTROL)
VALVE
(22) LOW
WATER CUTOFF
(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
(15) VENT
TEMPERATURE
SENSOR
(26) GAS CONNECTION
(33) COMBUSTION
ANALYSIS TEST
PORT
(24) HIGH VOLTAGE
JUNCTION BOX
(9) HEAT
EXCHANGER
(29) BOILER
CONTROL
MODULE
Fuse and
Holder
(5) IGNITER
(6) FLAME
SENSOR
(7) SIGHT GLASS
(32) FLUE
AIR MIXTURE
PRESSURE
TEST PORT
(16) CONDENSATE
DRAIN
(31) TRANSFORMER
(1) USER INTERFACE
(11) RETURN WATER
TEMPERATURE SENSOR
(13) INTERNAL PRIMARY
LOOP BALL VALVE
(35) HEAT EXCHANGER
SURFACE TEMPERATURE
SWITCH
3 - COMPONENT LISTING
(36) ASME
PLATE
(21) SUPPLY WATER
TEMPERATURE SENSOR
& HIGH LIMIT SWITCH