Yeoman DEVON 50 manual Airwash & Primary Air Controls, HEATING SYSTEM controls, Door Handle

USER INSTRUCTIONS

AIRWASH & PRIMARY AIR CONTROLS

1.14 Use a gloved hand to operate air controls.
Airwash Control
Open	Close

Airwash Control

Primary Air Control					PR7519
		Primary Control
	Open		Close	Open

DOOR HANDLE

1.15Use a protected gloved hand to operate.

DO NOT OPEN THE DOOR WITH BARE HANDS

To Open and Close

Drop door tool over knob to fit.

Rotate 1/2 turn anti-clockwise to open.

Rotate 1/2 turn clockwise to close.

Lift up door tool to remove

Open

PR7523

1.16Never open the door with your bare hands.

1.17Closing the door is the reverse of the previous.

HEATING SYSTEM controls

CONTROLS, GENERAL

1.18 The controls fitted to the system will provide two functions:

—To control the comfort level in the house.

—To maintain safety in the event of misuse or mechanical failure.

COMFORT CONTROLS

1.19A programmable timer switches the pump on when heat is required and off when it is not.

The timer, when combined with a room thermostat and / or thermostatic radiator valves, enhances the comfort levels in the house.

Some room thermostats combine the function with the timer and can be programmed to reduce the room temperature rather than turning the system off. This is effective in not allowing rooms to become too cold and speeding up recovery time.

1.20The hot water cylinder can also be fitted with a thermostatic valve which turns off the flow when the cylinder has reached the desired temperature, but the heat leak radiator will have to be bigger to cope with the extra load when the tank is isolated.

SAFETY CONTROLS

1.21A high limit thermostat is fitted to the gravity flow pipe set at 80˚C. This thermostat should be connected to the pump so that the pump is turned on if the temperature exceeds

80˚C. This will prevent accidental boiling in the gravity circuit.

1.22It is also recommended to fit a low limit thermostat on the central heating return set at 45˚C. This thermostat will turn the pump off if the return temperature falls below 45C. This will prevent corrosion and condensation within the stove.

NOTE – Further information on solid fuel central heating systems can be found in the HETAS engineers training manual.

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