HTP EFT-399 - Manual (Page 10)

10
LP-387 REV. 6.10.14

Installation Manual

Warranty

CSD-1 Form

H-2 Data Sheet

NAT to LP Conversion Kit (Included with NAT models)
B. HOW BOILER OPERATES
ELITE FT
®
condensing technology intelligently delivers hydronic heating while maximizing efficiency. 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 extract all available heat from the
supply line 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 be set up to monitor outdoor temperature through an outdoor sensor to regulate boiler set point. The system can be
further enhanced by installing an indirect water heater to provide domestic hot water.
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 sensor to provide feedback on set point temperature in order to adjust heating input from the connected boilers. Each
cascaded boiler will have its own pump to provide maximum flow and control heat exchanger flow rate.
Text Display and Operational LED Light Indicators
– The display allows the user to change 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 and provides 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 off of the burner.
Supply Water Temperature Sensor
– This sensor monitors boiler outlet water temperature (System Supply). The control adjusts boiler
firing rate so the supply temperature will match boiler set point.
Return Water Temperature Sensor
– This sensor monitors the boiler return water temperature (System Return).
Flue Sensor
– Monitors flue temperature and adjusts firing rate.
Temperature and Pressure Gauge
– Allows the user to monitor system temperature and pressure.
Electrical field connections with terminal strips
– The electrical cover allows easy access to the line voltage and low voltage
terminals strips which are clearly marked to facilitate wiring of the boiler.
Condensation Collection System
– This boiler is a high efficiency boiler, and will produce condensate. The collection system has a
float switch which monitors the condensation level and prevents condensation from backing up into the combustion system. Inside the
collection system there is a built in trap which seals the combustion system from the connected drain. This condensate should be
neutralized to avoid damage to the drainage system or piping.
Outdoor Sensor
– The outdoor sensor monitors outdoor temperature and adjusts boiler set point to provide greater efficiency.
0-10 Volt Input
– Allows Installer to connect a BMS (Building Management System) to control the boiler.
Condensate Flue Check System
– The check system prevents exhaust from the heat exchanger from backing up into cabinet.