Page 58
CABINET HEATER
8.4
Combination Fan/Limit Thermostat (See Fig. 1.1)
To gain access to this thermostat, slacken the cover retaining screw (on top) and pull off the cover.
Disconnect the electrical connections by pushing in with a small screwdriver and pulling out the wiring (see Fig. 2.3).
Unscrew the conduit bush and the two fixing screws and withdraw the unit from the cabinet.
To refit:
reverse the above procedure and reset as in 5.1.2.1.
Set the new thermostat as described in Section 5 and seal the setting of the limit hand.
WARNING
WHEN REPLACING A COMBINATION THERMOSTAT ENSURE THAT THE LOW VOLTAGE LINK MARKED ON
THE THERMOSTAT REMOVE FOR LOW VOLTAGE IS REMOVED (SEE FIG. 2.3).
PERMANENT DAMAGE WILL BE CAUSED BY LEAVING THIS LINK IN.
8.5
Main Fan Motor (Three Phase Belt Drive Heaters Only)
Disconnect electrical connections at contactor/overloads (see Fig. 2.4 and Section 8.2).
For Starr/Delta starters there are 6 wires between the motor and the starter.
Remove the left-hand lower side panel to gain access to the motor.
Unscrew the bolts securing the motor to the mounting bracket. The motor will now lift out.
To refit:
reverse the above procedure, tensioning the belts as in 7.2 and ensuring that the pulleys are properly aligned
i.e. the belts should be exactly parallel to the fan case.
For Star/Delta starters, play specific attention to the 6 motor connections. They must be as shown in Fig. 6.14, otherwise
motor damage may occur.
8.6
Main Fan Units
Dependent on the model of the heater the main fan unit will be direct drive (with integral motor) or belt drive. The belt
drive units are normally the double fan units (i.e. two fan on a single shaft) that are used on the models 060 to 0100.
All the fans are secured to the base of the heater by four bolts per fan case, and also to the fan tray by bolts through the
outlet flange.
To gain access to the fans remove the lower side panels of the heater. For models 060 and above or High Flow models,
remove the upper side panels of the same side and the vertical centre bar to allow the fans to slide out of the cabinet.
Disconnect the electrical connections, on direct drive units these will be at the terminal block for single phase and the
contactor for three phase.
Remove the fixings securing the fan, and the fan will now pull out of the heater through the side.
To refit reverse the above ensuring correct belt alignment and tension as in 8.6 for belt drive units.
Check the correct rotation of the fan under power see 5.1.1.4.
Note:
The motor on Direct Drive Fan Units can only be replaced as a complete fan/motor assembly to ensure that they
are correctly balanced.
Always test fire the heaters as in Commissioning of the Air Heater Section 5.
Содержание Combat HF 30 v4
Страница 2: ......
Страница 47: ...Page 45 CABINET HEATER Section 6 Wiring Diagrams Fig 6 1 As Wired Diagram for Models 015 to 030 Floor Standing ...
Страница 48: ...Page 46 CABINET HEATER Fig 6 2 As Wired Diagram for Models 015 to 030 Horizontal Mounting ...
Страница 49: ...Page 47 CABINET HEATER Fig 6 3 As Wired Diagram for Models 040 and 050 Floor Standing ...
Страница 50: ...Page 48 CABINET HEATER Fig 6 4 As Wired Diagram for Models 040 050 Horizontal Mounting ...
Страница 51: ...Page 49 CABINET HEATER Fig 6 5 As Wired Diagram for Models 060 to 0100 Floor Standing ...
Страница 52: ...Page 50 CABINET HEATER Fig 6 6 As Wired Diagram for Models 060 to 0100 Horizontal Mounting ...
Страница 55: ...Page 55 CABINET HEATER Fig 6 12 Wiring Diagram for High Flow Models HF40 v3 HF50 v2 HF50 v3 and HF50 v4 ...