Westinghouse Premium WGRT 199 Series Installation, Start-Up, Maintenance, Parts, Warranty page 14

14
Figure 2 - 150 Model Dimensions
A
B
C
D
E
F
G
Table 9 - 150 Model Adapter Specifications
How the Water Heater Operates
Condensing technology intelligently delivers water heating while
maximizing efficiency. Outlined below are the features of the system
and how they operate:
Stainless Steel Heat Exchanger - The highly efficient 316L stainless
steel fire tube heat exchanger with internal aluminum is designed
to extract all available heat from the combustion process and pass
it into heat transfer fluid. The stainless steel construction provides
protection for longer service life. The heat exchanger offers greater
water content, providing lower system pressure and greater overall
system efficiency.
10 to 1 Modulating Combustion System - The combustion
system is specially designed to provide very high turn down. This
combustion system will modulate the burner output to very low
levels to match the system demand and achieve better overall
control of the heating system for maximum efficiency and reliability.
Control – The integrated control system monitors the system and
responds to internal and external signals to regulate fan speed
and control output. This allows the water heater to deliver only the
amount of hot water required and nothing more.
whl-004 Rev. 000 Rel. 013 Date 5.1.18
Description
Exhaust Outlet Adapter
Air Intake Adapter
Gas Inlet Adapter
DHW Outlet Adapter
DHW Inlet Adapter
Condensate Adapter
DHW Inlet Filter
The control can regulate the output of multiple water heaters through
its cascade system function by establishing one water heater as the
master and the other connected water heaters as followers. The
master water heater requires a sensor to provide feedback on set point
temperature in order to adjust heating output from the connected
water heaters. Multiple water heater cascaded systems offer greater
system turndown and redundancy.
Electronic LCD Display – The high resolution display allows the user
to monitor water heater functions. The display also provides the means
to program the system parameters to maximize the efficiency of the
system design.
Combustion System (Blower – Gas Valve – Mixer – Burner – Spark
Ignition) – The highly efficient spark ignition combustion system uses
a variable speed blower to adjust combustion as the system requires
more or less energy. The negative regulated gas valve provides only
the amount of fuel required to ensure clean combustion. The mixer
accurately regulates the combination of gas and air throughout the
modulating range to ensure high reliability. The burner is constructed
of durable ceramic metal fiber for long service life.
Diameter
2"
2"
3/4" NPT
3/4" NPT
3/4" NPT
1/2" NPT
N/A