| HEATER DESCRIPTION
The heater element and its associated control supplement the fresh air ventilating system. The temperature of the air directed to either car or screen, is regulated by means of the "Temperature" control. Use of the blower increases the air flow. The blower switch is incorporated in the air control lever; pull to switch "ON " and push to switch " OFF".
On those models fitted with a two speed blower, a separate toggle switch is located at the outer end of the facia panel. The switch has three positions: —
| UP |
... ... ... ... ... |
OFF |
| CENTRE |
... ... ... ... ... |
SLOW |
| DOWN |
... ... ... ... ... |
FAST |
Hot water from the engine cooling system circulates through the heater element and is returned to the inlet side of the water pump (impeller). The heater element is fitted into the air box built into the scuttle.
To maintain heater efficiency under very cold conditions a winter thermostat (870C. —1880F.) may be fitted, (See General Data and Parts List).
NOTE. The original thermostat MUST be refitted when climatic conditions return to normal.
HEATER ELEMENT—To remove and refit
Set the "Temperature" control lever to "HOT" (Max). Drain the cooling system—save anti-freeze if used. Uncouple the bonnet (hood) release control at the air box and remove the air box cover.
Disconnect the inlet and outlet hoses and withdraw clear of the element.
Lift out the element.
Refitting Is a reversal of the above operations, care must be taken to ensure that each felt strip and the rubber drain trough is properly positioned and also that the adhesive strip is not disturbed.
NOTE. After refilling it may be necessary to bleed the heater—See "TO BLEED THE HEATER"
TEMPERATURE CONTROL
To remove and refit
Release the outer cable clamp and remove the inner cable from the peg on the control lever.
Remove the control lever knob—screw off.
Undo the two screws, with nuts and washers, which secure the control to the facia and withdraw the control. Note the spacing washers fitted between the control and the lug on the facia panel.
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To remove the control cable, proceed as follows: - Release the Inner cable at the water valve trunnion. Withdraw the inner cable into the car Interior.
Feed a length of piano or welding wire through the outer cable. Now withdraw the outer cable leaving the slave wire in position to act as a guide when refitting or renewing the cable.
Refitting of both the control and the cable is a reversal of the above operations.
WATER VALVE—To remove and refit
Set the "Temperature" control lever to " HOT" (Max.) and drain the cooling system—save anti-freeze if used.
Release the control cable.
Discontent each hose at the water valve.
Undo the retaining screws and remove the water valve assembly complete with bracket.
Refitting is a reversal of the above operations.
NOTE. After refilling. It may be necessary to bleed the heater—See "TO BLEED THE HEATER".
BLOWER—To remove and refit
Disconnect the battery.
Remove radio and loudspeaker assembly (if fitted).
Disconnect the blower cable:
Single speed model—disconnect the blower cable at the snap tube connector.
Two-speed model—disconnect the blower leads at the switch.
Remove the three nuts and washers, one of which also secures the blower earth lead and carefully remove the blower.
Refitting is a reversal of the above operations. When refitting the blower ensure that the upper sponge collar is in position and that the blower outlet enters the rubber at the air box inlet.
Reconnect the blower cable. On those models fitted with the two-speed blower, re-connect the green cable to terminal 6 on the switch and the brown cable to terminal 8.
Reconnect the battery, start clock (if fitted) and test the blower.
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