11
CONFIGURING THE BENSON CP4 (HIGH/LOW TYPE)
HIGH FLAME BOOST
Enabling this option gives the following functionality.
Whenever there is a heat demand, both high and low relays are activated. After 1 minute the system checks to
see if both high and low relays are required. If the temperature is within the differential programmed, the high
flame relay is switched off.
HIGH/LOW DIFFERENTIAL
When the Benson CP4 is being used to control a two stage heater, you must enter the Hi/Lo differential
setting.
• You are now prompted to enter the Hi/Lo differential.
• A differential setting of 4 and a required temperature of 20°C means that the control will have low and high
flame active until the actual temperature reaches 16°C. At this point, the high flame will be switched off.
DOUBLE IGNITION
Enabling this option gives the following functionality.
When the heat relay is activated for the first time of each switching time, it will switch off after 30 seconds. Then
after a further 10 seconds the relay is re-energised and will operate as normal.
This operates at the start of every switching period and is used to ensure
that the heater fires when installed in areas where there is a high level of
condensation.
PROVING SWITCH
You are now prompted to select whether you have a proving switch
on the system.
When there is a demand for heat, the Benson CP4 looks to ensure that the proving switch is made. The heat
outputs (High/Low) will be energised when the switch is made.
HIGH FLAME BOOST
N<0> Y<1> :0
ENTER THE HILO
DIFFERENTIAL:04
DOUBLE IGNITION ?
N<0> Y<1> : 0
PROVING SWITCH?
N<0> Y<1> :0
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