Weil-McLain Evergreen EVG 110, Руководство пользователя

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The Evergreen
®
Gas-fi red water boilers
Part number 550-100-191/0917
3
®
g
as-fired water boiler —
70/110/155
Boiler Manual
1. Stainless steel fi retube heat exchanger
2. Heat exchanger access cover/burner mounting plate
3. Blower
The advanced blower design and air inlet silencer on Evergreen
®
boilers
result in very quiet operation.
Air enters the boiler enclosure through the air intake adapter (Item 19),
fl ows 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 to the burner (Item 12).
4. Gas valve
The automatic gas valve references the pressure in the cabinet and allows gas to
fl ow when the control (Item 16) applies power. A manual gas shut off valve is
shipped loose with the boiler. It allows shutting off the gas supply for servicing
or shut down. See instructions in this manual for manual gas valve installation.
5. Air inlet silencer
The horn-shaped air inlet silencer signifi cantly reduces fan noise, providing
exceptionally quiet operation.
6. Venturi
When air fl ows through the venturi, a negative pressure is created. This causes
gas to fl ow from the gas valve into the venturi, where it is mixed with the air.
The gas/air mixture then continues into the blower.
7. Supply water temperature dual sensor
This dual sensor monitors boiler outlet water temperature. The control adjusts
boiler fi ring rate so the outlet water temperature is correct, based on the
calculated (if outdoor reset used — see page 139 ) or fi xed target temperature.
8. Return water temperature sensor
This sensor monitors return water temperature to the boiler. The control
reduces or increases boiler input, depending on how close the return water
temperature is to the outlet water temperature.
9. Electronic display & buttons
The electronic display is used to confi gure boiler settings and monitor
boiler operation. The buttons allow changing display mode, selecting and
adjusting control settings, and resetting the control after lockout.
10. Flue adapter (fi ts 3" PVC)
11. Flue pipe
12. Burner (not shown)
Made with high-grade stainless steel construction, the burner uses pre-
mixed air and gas. The burner and control provide modulating fi ring.
13. Water outlet pipe (system supply)
14. Water inlet pipe (system return)
15. Gas line
This stainless steel fl exible gas line connects the incoming gas line to the
gas valve.
The gas line has a ½” NPT connection for installation.
16. Control module
(see discussion upper right)
17. Communication Board
The communication board provides boiler-to-boiler communication and
Building Management System (BMS) interface.
18. Boiler circulator terminal block
19. Air intake adapter (fi ts 3" PVC)
20a. Electrical entrances (line voltage)
The top left side knockouts are designated for line voltage wiring only.
Ensure all wiring entrances are sealed.
20b. Electrical entrances (low voltage)
The bottom left side knockouts are designated for low voltage wiring
only. Ensure all wiring entrances are sealed.
20c. Electrical entrance (multiple boiler communication)
The top right knockout (1) is designated for multiple boiler
communication and BMS wiring. Ensure all wiring entrances are sealed.
21. Boiler drain valve (not shown)
Shipped loose for fi eld piping. Pipe drain valve on reducing tee at the lowest
point of return piping to boiler. See instructions, page 14 in this manual.
22. Condensate trap nozzle
The outlet at the bottom of the condensate collection dish. This is where
condensate is discharged from the boiler. The condensate trap assembly
attaches here.
23. Flue gas condensate drain trap assembly and bracket
The condensate trap assembly and bracket are fi eld-installed, condensate
drain trap is connected to the condensate trap nozzle as shown in this
manual.
24. Jacket door
The jacket door is sealed to the boiler assembly around its entire perimeter.
25. Front door latches
Two (2) latches secure the door in place.
26. Door retention screw
27. Ignition electrode/fl ame sensor
The burner fl ame is ignited by applying a high voltage to the ignition
electrode. This causes a spark (from electrode to ground). After ignition,
the electrode measures fl ame signal.
28. Flame inspection window
The quartz glass window provides a view of the burner surface, the fl ame,
and the ignition electrode.
29. Flue gas dual sensor
This dual sensor monitors the fl ue gas exit temperature. The Evergreen®
control will shut down the boiler if fl ue gas temperature gets too hot.
This protects the fl ue pipe and the heat exchanger from overheating.
30. Gas valve reference hose (EVG-70 only)
This rubber line connects the gas valve diaphragm reference chamber to
the venturi intake to insure the valve senses the correct reference pressure.
31. Transformer
The 120V/24V transformer provides 24V to low voltage control circuitry.
Do
NOT splice wiring into transformer.
32. Air baffl e
The air baffle protects internal boiler components by diverting any
incoming moisture or debris away from critical components. It must be
temporarily removed while servicing the heat exchanger.
33. Floor stand assembly
The provided stand allows for the Evergreen® boiler to be either wall
hung or fl oor standing.
Evergreen
®
control overview
• The Evergreen® control can operate a single boiler or coordinate
with other Evergreen® boilers in a multiple boiler system.
• Control inputs and outputs allow operation of multiple heating
circuits (space heating and DHW, for example).
• Up to three priority levels can be set, providing automatic switch-
over on demand.
• This manual provides quick set-up information for single boiler
installations.
• The Advanced Manual, also supplied with the boiler, provides
instructions for setting up multiple-boiler systems and for using
advanced options for single boilers.
Evergreen
®
control operation
• The control responds to signals from the room thermostats, DHW
aquastats (if used), boiler sensors (boiler return, boiler supply, fl ue
temperature), outdoor temperature and system sensors, if used.
• The control automatically adjusts blower speed (and gas fl ow
rate) to match boiler output to space heating and/or DHW
heating demand.
• The default control settings provide for three space heating zones.
The control can be easily set up for operation with a DHW zone,
with or without domestic priority.
Evergreen
®
control WIZARD
• The control setup Wizard is available from the BOILER
SETTINGS menu that appears during initial startup.
• The Wizard leads through a step-by-step setup procedure
designed for the application chosen.
• Context-sensitive help is available to explain the purpose of key
setup items.