Principal Parts - Lochinvar HERALD HCB46CE Installation Manual

3.0

PRINCIPAL PARTS

ITEM DESCRIPTION
Stainless steel heat
1
exchanger
Heat exchanger access
2
cover
3 Fan
4 Gas valve
5 Venturi
6 Flue gas sensor
Boiler outlet temperature
7
sensor
Boiler inlet temperature
8
sensor
9 Electronic display
10 Flue pipe adapter
11 Burner
12 Water outlet
13 Water inlet
14 Gas connection pipe
15 SMART Control Module
16 Manual air vent
17 Air intake adapter
Mains voltage junction
18
box
19 Boiler drain port
Low voltage connection
20
board
Low voltage wiring
21
connections (knockouts)
Condensate drain
22
connection
23 Access cover - front
24 Ignition electrode
25 Flame inspection window
26 Gas shutoff valve
27 High limit sensor
28 Flame sense electrode
Mains voltage wiring
29
connections (knockouts)
30 Top panel
31 Power switch
32 Levelling legs
3.1.1 P
RINCIPLE PARTS
FUNCTION
Allows water to flow through specially designed coils for maximum heat transfer, while providing protection
against flue gas corrosion. The coils are encased in a jacket that contains the combustion process.
Allows access to the combustion side of the heat exchanger coils.
The fan pulls in air and gas through the venturi (item 5). Air and gas mix inside the fan and are pushed into
the burner, where they burn inside the combustion chamber.
The gas valve senses the negative pressure created by the fan, allowing gas to flow only if the gas valve is
powered and combustion air is flowing.
The venturi controls air and gas flow into the burner.
This sensor monitors the flue gas exit temperature. The control module will modulate and shut down the boiler
if the flue gas temperature gets too hot. This protects the flue pipe from overheating.
This sensor monitors boiler outlet water temperature.
This sensor monitors return water temperature.
The electronic display consists of 7 buttons and a dual line 32-character liquid crystal display.
Allows for the connection of the flue system to the boiler.
Made with metal fibre and stainless steel construction, the burner uses pre-mixed air and gas and provides a
wide range of firing rates.
BSP water connection that supplies hot water to the system, either 1-1/4" or 2", depending on the model.
BSP water connection that returns water from the system to the heat exchanger, either 1-1/4" or 2", depending
on the model.
Threaded pipe connection, 1/2 ", 3/4", or 1", depending on the model. This pipe should be connected to the
incoming gas supply for the purpose of delivering gas to the boiler.
The SMART Control responds to internal and external signals and controls the fan, gas valve, and pumps to
meet the demand.
Designed to remove trapped air from the heat exchanger coils.
Allows for the connection of the air intake pipe to the boiler.
The junction box contains the connection points for the mains voltage power and all pumps.
Location from which the heat exchanger can be drained.
The connection board is used to connect external low voltage devices.
Conduit connection points for the low voltage connection board.
Connects the condensate drain line to a 1/2" PVC union.
Provides access to the gas train and the heat exchanger.
Provides direct spark for igniting the burner.
The quartz glass window provides a view of the burner surface and flame.
Manual valve used to isolate the gas valve from the gas supply.
Device that monitors the outlet water temperature. If the temperature exceeds its setting, it will break the
control circuit, shutting the boiler down.
Used by the control module to detect the presence of burner flame.
Conduit connection points for the mains voltage junction box
Removable panel to gain access to the internal components.
Turns 230 VAC ON/OFF to the boiler.
Used to allow the heat exchanger to be levelled. This is needed for the proper draining of the condensate
from the combustion chamber
L ,
IST TO BE USED IN CONJUNCTION WITH
3.1.2
NOTE
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
Not Shown in 3.1.2
7