NTI INSTALLATION MANUALS

Part 2 - Before You Start

How the Boiler Operates TRX condensing technology intelligently delivers hydronic heating while maximizing e ciency. Outlined below are system features and operation: Stainless Steel Heat Exchanger The highly e cient 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 modulates the output of the burner during operation to match system demand and achieve the control set point while in operation. The set point can change by internal or external signals to 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 to monitor outdoor temperature through an outdoor sensor or through internet weather (with optional WiFi connection), use an optional room sensor, or use both outdoor temperature and an optional room 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 e ciency. 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 ow and control heat exchanger ow rate. Text Display and Operational Display Icons The display allows the user to change system parameters and monitor system outputs. Gas Valve Senses suction from the blower, allowing gas to ow only if powered and combustion air is owing. Integrated Venturi Controls air and gas ow into the burner. Burner The high grade stainless steel burner uses premixed air and gas to provide a wide range of ring rates. Spark Ignition The burner is ignited by applying high voltage through the system spark electrode. The spark from the electrode ignites mixed gas o of the burner. Supply Water Temperature Sensor This sensor monitors the boiler outlet water temperature (System Supply). The control adjusts boiler ring rate so the supply temperature will match the boiler set point. Return Water Temperature Sensor This sensor monitors boiler return water temperature (System Return). Flue Sensor Monitors ue temperature and adjusts ring 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 clearly marked line voltage and low voltage terminal strips to facilitate wiring the boiler. Condensate Collection System This boiler is a high e ciency appliance and will produce condensate. The condensate collection system has a oat switch which monitors condensate level and prevents condensate from backing up into

NOTICE

UNCRATING THE BOILER - Any claims for damage or shortage in shipment must be Àled immediately against the transportation company by the consignee. Remove the boiler and accessory box from the packaging. Take care to place the boiler and accessories in a safe location prior to installation to prevent damage to the mechanical connections.

A. What’s in the Box

5

6

1

2

7

8

9

11

12

4

3

Included components:

Nr.

Quantity

Description

1

1

Condensing Gas Boiler

2

1

Condensate Drain Pipe

3

1

Upper Bracket

4

2

Assembly Screws (Fischer Type SX )

5

1

CH Pressure Relief Valve

6

1

3” CPVC Pipe, 5” Long

7

2 + 2

2”Vent Screen + 3”Vent Screen

8

1

Tridicator

9

1

Lower Bracket

1

Installation Manual (This Document)

1

User’s Information Manual

1

Connectivity Quick Start Guide

10

1

LP Conversion Instructions

1

Warranty

1

Programming Guide

11

1

LP Gas Conversion Kit

12

1

Outdoor sensor Kit

13

1

3/4” Cap (Not Included with Combis, and not shown)

Table 5 - Included with the Boiler

10