Keston Combi 35kw User Manual download pdf (Page 28)

INSTALLATION

Keston Combi - Installation and Servicing

CH OPERATION

The On and Off time control of central heating should be controlled by a separate timer. This can be a standard unit or either of

the options available from Keston Combi range.

During programmed On times the Central Heating Radiator Flow Temperature is controlled by the boiler relative to the Outside

Temperature as shown in the following diagram.

The Room temperature can be adjusted using the Central Heating Temperature Control Knob on the boiler as follows.

Essentially rotating the knob clockwise increases the room temperature and rotating the knob anti-clockwise decreases the room

temperature.

If the Central Heating Temperature Control Knob is rotated fully clockwise then for an Outside Temperature of 15°C a Flow

Temperature of 40°C will be provided. For an Outside Temperature of 0°C a Flow Temperature of 78°C will be provided with the

relationship varying lineally in between these 2 points (line on the graph 2.5)

If the Central Heating Temperature Control Knob is in its mid position then for an Outside Temperature of 15°C a Flow

Temperature of 36°C will be provided. For an Outside Temperature of 0°C a Flow Temperature of 65°C will be provided with the

relationship varying lineally in between these 2 points (line on the graph between 1.6 and 1.8)

If the Central Heating Temperature Control Knob is rotated fully anti-clockwise then for an Outside Temperature of 15°C a Flow

Temperature of 30°C will be provided. For an Outside Temperature of 0°C a Flow Temperature of 44°C will be provided with the

relationship varying lineally in between these 2 points (line on the graph 1.0)

20 10 0 -10 -20 -30 -40

100

Weather Compensation Control / Room Setpoint = +20ºC

Outside Temperature [ºC]

CH Temperature Setpoint [C]

Heating slope

2.5 2.2 2.0 1.8 1.6 1.4 1.2 1.0

INSTALLATION

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 71 72

No comments

Keston Combi 35kw User Manual Page 28