Reliance Radiance RAPID RTIU702 Series - User Manual

Installation and Maintenance Instructions
Radiance
®
Thermal Interface Units (TIU)
RAPID - RTIU702XXX
Twin plate exchanger unit to generate instantaneous DHW
with indirect heating connections.
Designed and
manufactured
in the UK
Conforms to Building Regulations Part L (2010)

Summary

Safety

Hot Water Safety

Warning about high temperatures and potential for severe burns from hot water.

Hot Surfaces Safety

Caution regarding hot surfaces of the TIU and associated pipework during operation.

Electrical Safety

Instructions for electrical isolation and requirements for qualified electricians for installation and servicing.

Lifting Safety

Working Parameters and Specifications

Internal System Components Schematic

Internal System Components Diagram

Operation

DHW Demand Operation

Describes the process of heating domestic hot water when a hot tap is opened.

Space Heating Demand Operation

Explains how space heating is activated and controlled by external devices.

Installation

Unpacking the TIU

Installation: Direct Wall Mount

Wall Mounting and Ball Valve Connection

Installation: Using First Fix Rail

Mechanical Fixing with FFR

Installing the First Fix Rail (FFR)

Installation: Stand Off Frame with FFR

Mechanical Fixing (Stand Off Frame & FFR)

Installing the FFR for Stand Off Frame

Stand Off Frame Assembly

Attaching Stand Off Frame to FFR

Direct Wall Mount for Stand Off Frame

Mounting TIU to Stand Off Frame

Steps for lifting and securing the TIU onto the installed stand off frame.

Connecting Ball Valves

Hydraulic Connections - Top

Hydraulic Connections - Bottom

Optional First Fix Rail (FFR) Connections

SharkBite Metal Push-Fit Connectors

Electrical Installation

Junction Box Wiring

Circuit Diagram

Commissioning: Network Flushing

Filling TIU Hydraulic Circuits

Instructions for filling the three independent hydraulic circuits within the TIU.

Differential Pressure Control Valve (DPCV)

Bleeding the DPCV

Thermostatic Valves: By-pass & Heating Control

Thermostatic Mixing Valve (TMV): Adjustment

Heat Meter: Symbols and Error Codes

Heat Meter Screen Functions

Maintenance

Troubleshooting Overview

Fault Finding Flowchart

Symptoms and Actions Guide

Commissioning Check Sheet

Servicing Record

Reliance Radiance RAPID RTIU702 Series Specifications