Part number 550-100-260/0520
3
ECO
®
Tec
G
AS
-
FIRED
WATER
BOILER
–
80/110/150/199
B
OILER
M
ANUAL
3TAINLESSSTEELlRETUBEHEATEXCHANGER
The corr
osion resistant fire tube heat exchanger is our method of
transferring heat from the combustion chamber to the water.
(EATEXCHANGERCOVERPLATEBURNERMOUNTINGPLATE
Note !
: Combi shows cover plate (Item 2) (insulation removed for clarity),
Heating Only has insulation covering shown.
"LOWER
The advanced blower design and air inlet silencer on
ECO
Tec
boilers
results in very quiet operation. Air enters the boiler enclosure through
the air intake adapter (Item 21), flows through the enclosure, enters
the air inlet silencer (Item 5), then enters the venturi (Item 6) where it
mixes with gas before entering the blower. The blower pulls air through
these components and then pushes it through the cover plate
(Item 2)
to the burner (Item 13- not shown).
'ASVALVE
The automatic gas valve references the pressure in the cabinet and
allows gas to flow when the control (Item 18) applies power. (An on/
off switch is attached to the gas valve. It allows the shutting off of the
gas supply for servicing or shut down).
!IRINLETSILENCER
The horn-shaped air inlet silencer significantly reduces fan noise,
providing exceptionally quiet operation.
6ENTURI
When air flows through the venturi, a negative pressure is created.
This causes gas to flow from the gas valve into the venturi, where it is
mixed with the air. The gas/air mixture then continues into the blower.
"OILER#IRCULATOR
The pump is used to circulate hot water from the boiler, and then pass
it into heating system or the brazed plate heat exchanger.
"OILER/UTWATERTEMPERATUREDUALSENSOR
This dual sensor monitors boiler outlet water temperature. The control
adjusts boiler firing rate so the outlet water temperature is correct,
based on the calculated (if outdoor reset used — see page 149) or
fixed target temperature.
"OILER)NWATERTEMPERATURESENSOR
This sensor monitors boiler in water temperature. The Control may
reduce boiler input depending on if the boiler in and boiler out water
temperature difference is too large
.
%LECTRONICDISPLAY
The electronic color touch screen display is used to configure boiler
settings and monitor boiler operation. This display allows changing
display mode, selecting and adjusting control settings, and resetting
the control after lockout.
&LUEADAPTERlTS06#00AND33
"OILER&LUEPIPE
Internal flue pipe that carries exhaust gasses from heat exchanger to
vent/flue adapter.
"URNERNOTSHOWN
Made with high-grade stainless steel construction, the burner uses pre-
mixed air and gas. The burner and control provide modulating firing.
"OILERWATEROUTLETPIPE-ALE.04"OILER3UPPLY
"OILERWATERINLETPIPE-ALE.04"OILER2ETURN
,7#/PORTPLUG
3/4
.04
This plug can be removed to install a low water cut-off (LWCO).
'ASLINE
This stainless steel flexible gas line connects the incoming gas line to the
gas valve. The gas line has a ½” Male NPT connection for installation.
#IRCUITBOARDMODULESEEPAGE
!IRPRESSURESWITCH
Air pressure switch monitors maximum flue pressure.
(IGHVOLTAGEJUNCTIONBOXn
120VAC field wiring connections.
!IRINTAKEADAPTERlTS06#00AND33
A%LECTRICALENTRANCESLINEVOLTAGE
The bottom middle knockouts are designated for line voltage wiring
only. Ensure all wiring entrances are sealed.
22
B%LECTRICALENTRANCESLOWVOLTAGE
The bottom right side and top right knockouts are designated for
low voltage wiring only. Ensure all wiring entrances are sealed.
"OILERDRAINVALVENOTSHOWN
Shipped loose for field piping. Pipe drain valve on reducing tee at the
lowest point of return piping to boiler. See instructions, page 13 in
this manual.
#ONDENSATETUBE
The outlet at the bottom of the boiler to drain condensate. The
condensate trap assembly attaches here.
&LUEGASCONDENSATEDRAINTRAPASSEMBLYNOTSHOWN
The condensate trap assembly is field-installed, condensate drain trap
is connected to the condensate tube (Item 24) as shown in this manual.
*ACKETDOOR
The jacket door is sealed to the boiler assembly around its entire
perimeter.
&RONTDOORLATCHES
Two (2) latches secure the door in place.
)GNITIONELECTRODEmAMESENSORSHOWNON#OMBIPAGE
The burner flame is ignited by applying a high voltage to the ignition
electrode. This causes a spark (from electrode to ground). After
ignition, the electrode measures flame signal.
&LAMEINSPECTIONWINDOWSHOWNON#OMBIPAGE
The quartz glass window provides a view of the burner surface and
the flame.
&LUEGASDUALSENSOR
This dual sensor monitors the flue gas exit temperature. The control
will shut down the boiler if flue gas temperature gets too hot.
This protects the flue pipe and the heat exchanger from overheating.
4RANSFORMER
The 120V/24V transformer provides 24V to low voltage control
circuitry. Do
NOT
splice wiring into transformer.
!IRBAFmE
The air baffle protects internal boiler components by diverting any
incoming moisture or debris away from critical components.
$(7"RAZEDPLATE#OMBI/NLY
This secondary heat exchanger allows heat to transfer from the boiler
to the domestic water.
$(7/UTLETWATERTEMPERATURESENSOR#OMBI/NLY
NOTSHOWN
This sensor monitors domestic hot water leaving the brazed plate. The
control reduces or increase boiler input, depending on how close the
water is to target set point.
$(7WAYVALVE#OMBI/NLY
This valve will change boiler water flow either through the brazed plate
or bypass the braze plate and out to the heating system.
$(7WAYVALVE!CTUATOR#OMBI/NLY
This valve will change boiler water flow either through the brazed plate
or bypass the braze plate and out to the heating system.
$(7&LOWSENSOR#OMBI/NLY
This sensor monitors the DHW (domestic hot water) flow rate. When
flows 0.5 GPM or greater are detected, the boiler control will allow the
boiler to turn on and modulate accordingly.
7ATER0IPEn!IR%LIMINATION2ELIEF6ALVE#ONNECTION-ALE.04
Use 3/4" tee and 3/4" street elbow to connect relief valve. It is
recommended to connect an automatic air vent to top tee connection.
$(7)NLET0IPE
3/4
.04#OMBI/NLY
$(7/UTLET0IPE
3/4
.04#OMBI/NLY
The
ECO
Tec
Gas-fired water boilers
