Table of Contents
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Installation, Operation &
Maintenance Instructions
This manual is for the guidance of operators of the above Carbolite products
and should be read before the furnace is connected to the electricity supply.
Section
Manuals are supplied separately for the furnace controller
Please read the controller manuals before operating the furnace.
1.0
750°C Recirculating Air Furnace
type HRF 7/22
C
ONTENTS
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
(and overtemperature controller when fitted).
page
1
3
5
6
7
9
10
11
12
MF05
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Table of Contents
Related Manuals for Carbolite HRF 7/22
Summary of Contents for Carbolite HRF 7/22
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Page 1: Table Of Contents
Installation, Operation & Maintenance Instructions 750°C Recirculating Air Furnace type HRF 7/22 This manual is for the guidance of operators of the above Carbolite products and should be read before the furnace is connected to the electricity supply. ONTENTS Section page Symbols &... - Page 2 & W YMBOLS ARNINGS Switches and Lights Supply Light: when the furnace is connected to the electrical supply the light in the adjacent switch glows Heat Light: the adjacent light glows or flashes to indicate that power is being supplied to the elements Warning Symbols DANGER of electrical shock–...
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Page 3: Installation
NSTALLATION Unpacking & Handling When unpacking or moving the furnace always lift it by its base. Never lift it by the door. Use two people to carry the furnace where possible. Remove any packing material from the door gear and furnace chamber before use. Siting &... - Page 4 Electrical Connections Connection by a qualified electrician is recommended. Model HRF 7/22 is designed for use on a single phase A.C. supply, which may be Live to Neutral non-reversible, Live to Neutral reversible or Live to Live. Check the furnace rating label before connection. The supply voltage should agree with the voltage on the label, and that the supply capacity should be sufficient for the amperage on the label.
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Page 5: Operation
The furnace has mineral insulated heating elements, and does not require a door safety switch. Avoid burns. Carbolite can supply tongs, face masks, and heat resistant gloves. Before you remove a hot object from the furnace make sure you have a safe place to put it down. -
Page 6: Maintenance
To contact Thermal Engineering Services or Carbolite see the back page of this manual. Recommended Spares Kits Carbolite can supply individual spares, or a kit of the items most likely to be required. Ordering a kit in advance can save time in the event of a breakdown. Each kit comprises one thermocouple, one solid state relay, one door insulation piece, and set of elements. -
Page 7: Repairs & Replacements
& R EPAIRS EPLACEMENTS Safety Warning – Disconnection from Supply Always ensure that the furnace is disconnected from the supply before repair work is carried out. Safety Note - Refractory Fibrous Insulation This furnace contains refractory fibres in its thermal insulation. These materials may be in the form of fibre blanket or felt, vacuum formed board or shapes, mineral wool slab or loose fill fibre. - Page 8 If any fuse has failed, it is advisable for an electrician to check the internal circuits. Replace any failed fuses with the correct type. For safety reasons do not fit larger capacity fuses without first consulting Carbolite. The fuses are near the cable entry point, and access is by removal of the back panel.
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Page 9: Fault Analysis
AULT NALYSIS A. Furnace Does Not Heat Up The heating Check also that the SSR is working The HEAT light element has failed correctly is ON The HEAT light The controller The thermocouple has broken or has a wiring fault is OFF shows a very high temperature or a... -
Page 10: Circuit Diagrams
IRCUIT IAGRAMS HRF 7/22 - no overtemperature Filter (if fitted) Capacitor Motor Supply light Instrument Switch heat temperature controller thermocouple HRF 7/22 - with overtemperature Filter contactor (if fitted) Capacitor Motor Supply light Instrument Switch heat coil overtemp. controller thermocouple... -
Page 11: Fuses & Power Settings
OP.Hi For models made for 254 volts or 440 volts the power limit parameter may be set to 89%. If in doubt please contact Carbolite. OP.Hi For all other models in this manual the power limit parameter is set to 100%. -
Page 12: Specifications
Thank you for reading this data sheet. For pricing or for further information, please contact us at our UK Office, using the details below. UK Office Keison Products, P.O. Box 2124, Chelmsford, Essex, CM1 3UP, England. Tel: +44 (0)330 088 0560 Fax: +44 (0)1245 808399 Email: sales@keison.co.uk...