Manual

LP- 293 REV. 5.20.14

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 the boiler outlet water temperature (System Supply). The control adjusts

the boiler firing rate so the supply temperature will match the 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 appliance, therefore the boiler 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 – Monitors outdoor temperature and adjusts unit 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.

Pump Service Mode – Allows manual operation of pumps to commission system and check pump operation.

The Vision II System (Optional) – Allows the user to supply mixed temperatures in up to eight zones. The Vision II system controls the

temperature to each zone by employing three way mixing valves. The Vision II also controls the output temperature of the boiler to

assure accurate temperature delivery to all connected zones.

C. OPTIONAL EQUIPMENT

Below is a list of optional equipment available from HTP. These additional options may be purchased through your HTP distributor:

 Wall Mount Bracket (Part # 7450P-211)

 System Sensor (Part # 7250P-324)

 Indirect Tank Sensor (Part # 7250P-325)

 3" PVC Concentric Vent Kit (Part # KGAVT0601CVT)

 3” Stainless Steel Outside Termination Vent Kit (Part # V1000)