Carbolite HRF (MF05) - Manual (Page 3)

HRF
MF05 – 3.25
3
2.0 I NSTALLATION
2.1 Unpacking & Handling
Laboratory Models. 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. Remove any packing material from the door gear
and furnace chamber before use.
Industrial Models. Use a fork lift or pallet truck to position the furnace on a level floor.
NOTE: This product contains Refractory Ceramic Fibre (better described as Alumino Silicate
Wool) for precautions and advice in handling this material see the ‘Repairs and Replacements’
section.
2.2 Siting
Place the furnace in a well ventilated area, away from other sources of heat, and on a non-
inflammable surface that is resistant to accidental spillage of hot materials. Ensure that there is free
space around the furnace.
Do not obstruct any of the vents in the control section: they are needed
to keep the controls cool.
Ensure that the furnace is placed in such a way that it can be quickly switched off or disconnected
from the electrical supply - see below.
HRF 7/22: If the chimney is supplied unfitted, then fit it into the hole in the top of the furnace
case.
If required, a fume extraction duct of about 150mm inlet diameter may be placed directly
above the chimney outlet. Do not make a sealed connection to the furnace chimney as this causes
excessive airflow through the chamber and gives poor temperature uniformity.
2.3 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. The industrial models are usually
supplied for three-phase use.
Access to electrical connections is by removal of the back panel (laboratory models), or removal of
the lower right-hand panel (industrial models). The industrial models are fitted with an internal
isolator; cabling should be taken through the mesh base panel directly to the isolator or the nearby
terminals: live connections to the isolator; neutral (if present) and earth to the nearby terminals.
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.
The supply should be fused at the next size equal to or higher than the amperage on the label. A
table of the most common ratings is also given in section 8.1 of this manual. Where a supply cable
is present there are internal supply fuses; customer fusing is preferred but not essential.
If a supply cable is fitted, wire it directly to an isolator or fitted with a line plug. If one is not fitted
a permanent connection to a fused and isolated supply should be made to the internal terminals.
The line plug or isolating switch should be within easy reach of the operator, and should be
quickly removable or switchable.