Johnson & Starley JU117 - User Manual

These appliances have been tested and certified by B G Technology for use with natural gas.
1. BRIEF DESCRIPTION
1 Air circulating fan
2 Control Panel
3 Data plate
4 Limit Switch
5 Multifunctional control
6 Burner and Control Assembly
7 Gas connection
8 Fan Delay Control
9 Piezo unit
10 Summer Air Circulation switch
11 Draught Diverter
JU SERIES WARM AIR HEATERS
INSTALLATION, COMMISSIONING & SERVICING INSTRUCTIONS
JU78: G.C. No 42 417 79
JU117: G.C. No 42 417 78
JU156: G.C. No 42 417 77
Publication No. ZZ 602/6
June 2003
These instructions are to be left with the User or adjacent to the Gas Meter
1
Fig. 1
General Layout Diagram
1.1 JU78, JU117 and JU156 are open-flued, fan assisted Upflow, ducted warm air heaters, the outputs of which are as
follows:
JU78: 23.0kW (82.8MJ/h, 78,500Btu/h)
JU117: 34.3kW (123.4MJ/h, 117,000Btu/h)
JU156: 45.7kW (164.5MJ/h, 156,000Btu/h)
THESE APPLIANCES CONFORM TO BS800
1
2
3
4
5
6
7
8
9
10
11
Johnson and Starley prides itself on its ability to supply spare parts quickly and efficiently. If you have a problem in obtaining a
spare part, please contact Johnson and Starley Spares Department at the address below.
JOHNSON & STARLEY LTD.
Telephone: (01604) 762881 Rhosili Road,
Brackmills,
Fax: (01604) 767408 Northampton NN4 7LZ

Summary

HEATER COMPARTMENT AND CLEARANCES

Compartment Clearances

Minimum clearances required around the heater within a compartment.

VENTILATION AND COMBUSTION AIR

Ventilation Requirements

Guidelines for adequate air supply for combustion.

DUCT SYSTEM

INSTALLATION REQUIREMENTS

Flue Installation and Sizing

Guidelines for flue installation, joint sealing, and verticality.

Flue Sizing Calculation Example

Worked example demonstrating flue sizing calculation methodology.

Flue Block Installation and Checks

Procedures for installing flue blocks and performing flue system checks.

ELECTRICAL

Mains Connection

Thermostat Installation

GAS

Gas Supply and Connection

COMMISSIONING

Preparation and Checks

Fan Speed and System Balancing

Pilot and Main Burner Ignition

Detailed procedure for igniting pilot and main burners.

Main Burner Pressure Test

Procedure for testing and setting main burner pressure.

Burner Extinguishing and Temperature Rise

Automatic Controls Check

Safety Checks and Spillage Test

Performing gas soundness checks and spillage tests.

Post-Spillage Test Procedures

MAINTENANCE

Routine Maintenance Procedures

Step-by-step guide for regular maintenance tasks.

Burner and Controls Assembly Removal

Main Burner Cleaning

Injector and Burner Arm Procedures

Pilot Burner, Thermocouple and Electrode

Multifunctional Control Removal

Control Panel Removal

Fan Removal and Cleaning

Fan Delay Control Removal

Limit Switch Removal

Heat Exchanger Access

DEFECT DIAGNOSIS

Pilot Ignition Faults

Troubleshooting common issues with pilot burner ignition.

Burner and Fan Operation Faults

Diagnosing and resolving faults related to burner and fan operation.

Johnson & Starley JU117 Specifications

General

Brand	Johnson & Starley
Model	JU117
Category	Heater
Language	English