Rinnai RCB301AN Installation And Operation Manual page 10

Boiler Component Descriptions (Continued)
Item Name
Thermal Fuse
20
Heat Exchanger
21
Return Water Pipe
22
Condensate Trap
23
Gas Valve
24
Cascade Module
25
Webserver Card/
26
Wi-Fi Module
27
Boiler Name Plate
Additional Components Not Shown in Images:
Burner
Outdoor Sensor
Cascade System
Sensor
DHW Sensor/
Aquastat
Figure 5
Bottom View
26
Webserver Card/
Wi-Fi Module
10
A safety device that will stop the boiler operation in case of unusual
temperature rise.
The stainless steel condensing heat exchanger is efficiently designed to
maximize heat transfer through the coils while providing protection
against flue gas corrosion.
A 1-1/4 in. water pipe that returns water from the system to the heat
exchanger to be reheated.
The high efficiency heat exchange produces condensate during
operation. The condensate trap manages the condensate disposal and
the built-in float prevents flue gases to escape through the condensate
drain.
The zero governor gas valve regulates the gas flow through the venturi
based on suction from the fan.
Used to establish communication between boiler in a cascade system
by connecting them to each other using two conductor 18-20 AWG
shielded wire.
The Webserver Card/Wi-Fi Module (located on bottom of boiler)
(Figure 5) allows the installer to remotely monitor the system
operation, pro-actively optimize efficiency, and aid in troubleshooting.
This card also establishes the communication between main control
board and user interface screen.
The ASME name plate (Figure 5) includes the National Board (NB) and
Canadian Registration Number (CRN) numbers.
The metal fiber and stainless steel burner uses premixed air and gas
to provide a wide range of firing rates.
Uses the outdoor temperature to adjust the unit setpoint to provide
greater efficiency.
In a cascade system, the master boiler requires a system supply sensor
to operate properly. The location of the sensor should be downstream
of the of the boiler connection in the main system loop.
Monitors and controls the temperature of an indirect tank.
Rinnai Commercial Boiler Installation and Operation Manual
Description
27
Boiler
Name
Plate