Specifications

9
LP- 276 REV. 9.4.14
Mixing factor → M
f
= 140 – 40 = 1.43
70
First Hour Rating = [1,000,000 x .94 + .75 x 160] x 1.43
(140 – 40) x 8.31
First Hour Rating = [940,000 + 120] x 1.43
831
First Hour Rating = [1,131 + 120] x 1.43
First Hour Rating =
[1,251] x 1.43
First Hour Rating = 1789 Gallons
A. WHAT’S IN THE BOX
Also included with the boiler:
• Pressure and Temperature Gauge
• Pressure Relief Valve
• Intake PVC Tee with Screens
• Exhaust PVC Coupling with Screens
• Supply and Return Thermistors
• Flow Switch and Fitting
• Wiring Harness
• System/Pipe Sensor
• Installation Manual
• Warranty
• CSD-1 Form
• H-3 Data Sheet
B. HOW BOILER OPERATES
Mod Con VWH
®
condensing technology intelligently delivers large volumes of hot water while maximizing efficiency by measuring data
from the connected storage tank. Outlined below are the features of the system and how they operate:
Stainless Steel Heat Exchanger - The highly efficient stainless steel heat exchanger is designed to use the cold return water from the
system and extract the last bit of heat before it is exhausted.
Modulating Combustion System - The combustion system will modulate the output of the burner during operation to match the
system demand and achieve the control set point while in operation. The set point can change by internal or external signals which
enhance the overall performance of the system.
Control – The integrated control system monitors the system and regulates fan speed to control boiler output. This allows the boiler to
deliver only the amount of heat energy required and nothing more.
The control can regulate the output of multiple boilers through its cascade system function. The cascade system is capable of
connecting up to eight boilers together in such a way that they function as one boiler system. This allows for greater turn down ratios
and provides systematic control of the multiple boilers in an installation to minimize downtime and maximize efficiency.
The cascade system works by establishing one boiler as the master and the other connected boilers as followers. The master boiler
requires a cascade system sensor and a cascade pump in addition to its own boiler pump. Each of the follower boilers has an individual
pump.
System Display and Operational LED Light Indicators – The display allows the user to change the system parameters and monitor
system outputs.
Gas Valve – Senses suction from the blower, allowing gas to flow only if powered and combustion air is flowing.
All Metal Integrated Venturi – Controls air and gas flow into the burner.
Burner – Constructed of high grade stainless steel, the burner uses premixed air and gas fuel to provide a wide range of firing rates.
Spark Ignition – The burner is ignited by applying high voltage through the system spark electrode. This causes the spark from the
electrode to ignite mixed gas from the burner.