BENSON UHC Use And Maintenance Instructions

Rs/uhc series gas fired room sealed unit heaters

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Gas fired room sealed unit heaters
TECHNICAL INFORMATION, ASSEMBLY
INSTRUCTIONS, USE AND MAINTENANCE
RS/UHC
BENSON HEATING
LUDLOW ROAD
KNIGHTON
POWYS,
LD71LP U.K.
October 2002
Benson Heating is a Division of
Benson Climate Systems Ltd

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Summarization of Contents

COMPLIANCE NOTICES
Heater Range Overview
Lists different models of the RS/UHC heater range with corresponding codes.
GUARANTEE
Warranty Invalidation Conditions
Lists conditions that may void the heater's warranty.
Warranty Claim Procedure
Outlines the required information for processing warranty claims.
DESCRIPTION OF EQUIPMENT
Heat Exchanger Details
Details the stainless steel construction and patented exchange elements.
External Casing and Fan Assembly
Describes the casing and the centrifugal fan system.
Control and Safety Systems
Covers LM, TR, and SND thermostats, indication lights, and safety features.
IDENTIFICATION
Product Identification Plate
Details fields for model, serial number, technical specifications, and gas type.
TECHNICAL DATA
Heater Performance Specifications
Provides detailed technical parameters for different heater models.
WIRING DIAGRAM (Type 1-2-3-4)
Wiring Diagram Key and Symbols
Explains the symbols and abbreviations used in the wiring diagram.
WIRING DIAGRAM (Type 5-6)
Wiring Diagram Key and Symbols
Explains the symbols and abbreviations used in the wiring diagram.
REMOTE CONTROL CONNECTIONS
Remote Control Wiring
Details wiring for connecting to remote control panels CP2A and CP4A.
SETTING UP AND SERVICING
Setting Up Procedures
Step-by-step guide for initial heater setup and operation.
Servicing and Maintenance Guidelines
Provides guidelines for maintenance and servicing of the heater.
HEATER INDICATOR LIGHTS AND DELIVERY CHECKS
Heater Indicator Lights Explained
Explains the meaning of the red and yellow indicator lights.
Receipt and Transport Checks
Lists essential checks upon receiving the heater and during transport.
DIMENSIONS AND WEIGHTS
Heater Physical Specifications
Provides physical dimensions and weights for various heater types.
INSTALLATION GUIDELINES
Installation Warnings and Safety
Highlights crucial safety and installation precautions.
Site Selection and Placement
Advises on optimal placement for efficient operation and service access.
INSTALLATION EXAMPLES
External Installation Configurations
Illustrates configurations for installation outside the heated room.
Internal Installation Configurations
Illustrates configurations for installation inside the heated room.
WALL BRACKET DIMENSIONS
Mounting Bracket Specifications
Details dimensions and warnings for wall mounting brackets.
GAS CONNECTION PROCEDURE
Gas Supply Connection Requirements
Specifies necessary checks and components for gas connection.
FLUE AND COMBUSTION OPTIONS
Option B22: Single Flue
Details single flue configuration for combustion air from inside the room.
Option C12: Two Independent Pipes
Details two-pipe configuration with independent flue and air inlets.
Option C32: Vertical Coaxial Flue
Details vertical coaxial flue kit for roof installation.
B22 CONFIGURATION: WALL OUTLET
Types 1-2-3 B22 Wall Outlet
Shows B22 flue setup for types 1-3 with dimensions.
Types 4-5-6 B22 Wall Outlet
Shows B22 flue setup for types 4-6 with dimensions.
B22 CONFIGURATION: WALL OUTLET MAX DISTANCE
Types 1-2-3 B22 Max Distance
Illustrates B22 configuration with maximum wall distance for types 1-3.
Types 4-5-6 B22 Max Distance
Illustrates B22 configuration with maximum wall distance for types 4-6.
B22 CONFIGURATION: ROOF TERMINAL
Types 1-2-3 B22 Roof Terminal
Shows B22 roof terminal setup for types 1-3 with dimensions.
B22 CONFIGURATION: ROOF TERMINAL (TYPES 4-5-6)
Types 4-5-6 B22 Roof Terminal
Shows B22 roof terminal setup for types 4-6 with dimensions.
C12 CONFIGURATION: WALL OUTLET
Types 1-2-3 C12 Wall Outlet
Illustrates C12 wall kit for types 1-3 with independent pipes.
Types 4-5-6 C12 Wall Outlet
Illustrates C12 wall kit for types 4-6 with independent pipes.
C12 CONFIGURATION: WALL OUTLET MAX DISTANCE
Types 1-2-3 C12 Max Distance
Shows C12 wall kit with maximum distance for types 1-3.
Types 4-5-6 C12 Max Distance
Shows C12 wall kit with maximum distance for types 4-6.
C12 CONFIGURATION: HORIZONTAL COAXIAL WALL KIT
Types 1-2-3 C12 Horizontal Kit
Illustrates C12 horizontal coaxial kit for types 1-3.
Types 4-5-6 C12 Horizontal Kit
Illustrates C12 horizontal coaxial kit for types 4-6.
C12 CONFIGURATION: COAXIAL WALL KIT MAX DISTANCE
Types 1-2-3 C12 Max Distance
Shows C12 coaxial wall kit with max distance for types 1-3.
Types 4-5-6 C12 Max Distance
Shows C12 coaxial wall kit with max distance for types 4-6.
C32 CONFIGURATION: VERTICAL COAXIAL FLUE KIT
Types 1-2-3 C32 Vertical Kit
Illustrates C32 vertical coaxial kit for types 1-3.
ELECTRICAL PANEL
Control Panel Components and Layout
Identifies components within the electrical control panel and their layout.
External Connection Sockets
Lists and describes the available external connection sockets.
ELECTRICAL CONNECTIONS AND SAFETY
Mains Supply and Wiring Requirements
Details requirements for mains supply and general wiring practices.
Electrical Specifications Table
Summarizes electrical specifications including voltage, power, and current.
DUCT CONNECTIONS AND STARTUP
Duct Connection Guidelines
Instructions for connecting air intake and delivery ducts.
Pre-Commissioning Checks
Lists essential checks before initial start-up.
Initial Startup and Ignition
Describes the steps for starting up the heater and igniting the burner.
GAS SOLENOID VALVES
Gas Valve Operation and Types
Explains the function and types of gas solenoid valves used.
GAS CONVERSION PROCEDURE
Converting to Propane Gas
Provides instructions and parts for converting gas type from natural gas to propane.
GAS PRESSURE SETTINGS
Inlet and Head Pressure Adjustment
Explains how to adjust gas inlet and head pressures using test points.
Propane Gas Valve Settings
Details adjustments for gas valves when operating on propane.
THERMOSTAT FUNCTIONS
Fan Operation Thermostat (SND)
Describes the thermostat controlling fan operation based on temperature.
Limit Thermostat (LM)
Explains the safety thermostat that shuts down the burner on overheating.
FAN ASSEMBLY AND ADJUSTMENT
Fan Pulley and Belt Adjustment
Details how to adjust the motor pulley and belt tension.
Checking Fan Electrical Absorption
Describes how to measure and check the motor's electrical consumption.
CONTROLS
Control Checks
Lists checks for control systems, thermostats, and fan operation.
Routine Maintenance
General guidelines for carrying out maintenance and servicing.
Combustion Product Sampling
Details sample points for analyzing flue gases.
Centrifugal Fan Maintenance
Instructions for cleaning and maintaining the centrifugal fan.
CLEANING PROCEDURES
Exhaust Extractor Cleaning
Steps to clean dust from the exhaust extractor fan.
Limit Thermostat Annual Check
Annual check procedure for the LIMIT thermostat function.
Burner Cleaning
Process for cleaning the burner and associated parts.
Heat Exchanger Cleaning
Procedure for cleaning the heat exchanger by authorized personnel.
FAULT FINDING: BASIC CHECKS
No Operation Troubleshooting
Troubleshooting steps when the heater shows no operation.
Ignition and Indicator Light Issues
Troubleshooting ignition problems and lack of indicator lights.
No Ignition Troubleshooting
Troubleshooting steps for ignition failures and inactive indicator lights.
FAULT FINDING: BURNER ISSUES
Burner Cut-out After 5 Seconds
Diagnosing and resolving burner cut-out issues after initial ignition.
Explosive Start-up Troubleshooting
Troubleshooting causes for explosive burner start-up.
Burner Shutdown Without Lights
Diagnosing why the burner shuts down without indication lights.
FAULT FINDING: THERMOSTAT RELATED ISSUES
Burner Out Due to SND Thermostat
Troubleshooting burner shutdown caused by SND thermostat intervention.
Burner Out Due to TR Thermostat
Troubleshooting burner shutdown caused by TR thermostat intervention.
FAULT FINDING: CONTROL AND FAN ISSUES
Control Box Reset Failure
Diagnosing issues when the control box fails to reset.
Intermittent Fan Operation
Troubleshooting problems with the fan operating intermittently.
Fan Not Working Troubleshooting
Diagnosing why the fan is not operating at all.
Continuous Heater Operation
Troubleshooting issues where the heater runs continuously without reaching temperature.

Table of Contents