Gunning Electric Trench Heating Installation

When considering the location of the casing, the following should be considered.

The heater casing is a natural convector, and requires maximum freedom of air movement around it. If the casing is to be sited by an external wall, the heating element should be sited on the room side. This will encourage the cold down draught of air, from the outer wall or window, to enter the intake side of the casing. This will maximise the efficiency of the heater. Curtains, Drapes or Blinds should not be sited directly over the casing under a height of 300mm above the grille.

If the casing should become covered by carpet or furniture reducing the air flow through the casing, the heater will shut off when the internal casing temperature reaches 71 deg centigrade, and will automatically reset when the temperature fall below 55 deg centigrade.

The trench heating is supplied fully assembled, and wired internally to a ceramic three way terminal block. Connections to the terminal block should only be made by qualified personnel. The unit should be wired from a local isolator fitted with an appropriately rated fuse. A compression cable gland connector is fitted to the cable entry end of the casing.

Setting the casing in position

To position the casing, remove the roll up grille (11) and the protective wire mesh (9). Fit the 8 No. 8mm levelling bolts (13) into the nutserts in the base of the casing. Place the casing into the required position and adjust the levelling bolts to raise the casing to the required height. After the casing height has been set and levelled the casing can be fixed in position using an 8 mm all metal trough bolt anchor or equivalent (not supplied). Using a long reach 8mm drill bit, drill into the floor slab through the 10mmm fixing holes at each end of the casing. Allow for the nut on the fixing to be set at approximately half way down the thread. Place the bolt in position and tighten until the casing is firm. Re-check the casing height and re-adjust if required.

In case of water spillage there is a 10mm hole in the centre of the base of the casing to allow liquids to drain away.

After the casing has been fixed and the electrical connection has been made and tested, you should make sure that no debris or combustible materials have been left in the casing. Re-Fix the wire mesh and replace the roll up grille.

These instructions are to be read in conjunction with drawings:-

1/ General arrangement

2/ Wiring diagram