COMBAT FRSC User, Installation And Service Manual

COMBAT FRSC User, Installation And Service Manual

Room sealed unit heaters 75 - 210

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Room Sealed Unit Heaters
Models
FRSA, FRSB,
FRSC & FRSD
75 - 210
Installation, Commissioning,
Service & User Instructions
August 2000
Part No. X224B

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Table of Contents
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Summarization of Contents

Section 1. General Specification
1.1 Basic Information
Details heater types, specifications, electrical needs, and model variations.
1.2 Heater Operation
Explains automatic ignition, burner, and fan sequences during heating and cooling.
Section 2. Technical Data
2.1 Gas Controls
Discusses main gas control valves for natural gas and LPG, including their operation.
2.3 Limit Thermostats
Explains the function of two limit thermostats for overheating protection and manual reset.
Section 3. Heater Installation
3.1 Installation Standards
Lists relevant regulations and standards for installation by competent persons.
3.3 Gas Supply & Flue Requirements
Outlines gas supply, pipe sizing, pressure, and flue/air intake requirements.
3.6 Electrical Supply
Covers electrical installation, earthing, supply voltage, wiring, and isolator specifications.
Section 4. Commissioning the Heater
4.1 Pre-Commission Checks
Essential electrical and flue proving checks before lighting the heater.
4.3 Mechanical Checks
Checks for fan operation, pipe installation, thermostat settings, and dry runs.
4.6 Combustion Testing
Procedures for performing combustion tests, including CO2, CO, and temperature rise.
Section 6. Servicing Instructions
6.1 Burner Maintenance
Procedures for burner assembly, injectors, and ignition components maintenance.
6.2 Fan & Heat Exchanger Maintenance
Maintenance for fan/motor, cleaning blades, and heat exchanger inspection.
Section 7. Removal & Replacement of Parts
7.1 Burner Tray & Gas Valve
Steps for removing and replacing the burner tray and gas control valves.
7.3 Electrode & Probe Replacement
Procedures for accessing and replacing the flame probe or ignition electrode.
7.5 Fan Assembly
Procedure for removing and replacing fan assemblies for FRSA, FRSB, and FRSC models.
7.7 Combination Fan/Limit Thermostat
Steps for accessing and replacing the combination fan/limit thermostat.
7.8 Second Limit Thermostat
Procedure for removing and refitting the second limit thermostat.
7.9 Air Pressure Switch
Steps for removing, replacing, and testing the air pressure switch.
Section 8. Fault Finding
8.1 Gas Burner Fault Finding
Flowchart for diagnosing common gas burner issues and lockouts.
8.2 Flame Supervision Systems
Explains flame probe operation and diagnosing flame signal issues.
8.4 Main Fan Circuit
Troubleshooting steps for the main fan when it does not run automatically.
Section 9. User Instructions
9.1 Heater Operation
Explains heater operation based on external controls and thermostats.
9.4 Simple Fault Finding
Lists common reasons for non-operation and basic troubleshooting.
9.5 Service Requirements
Outlines annual servicing needs by a competent engineer and cleaning advice.
Section 10. Conversion Between Gasses
10.2 Burner Conversion Procedure
Outlines converting the burner by replacing injectors for different gases.
10.3 Gas Valve Conversion
Details converting the S.I.T. Nova gas valve between Natural Gas and L.P.G.

Table of Contents