MPT 700
14
3.2 Mode of operation 2 - heating/cooling with fixed pulse width
• The pulse width is set to a fixed value for each channel.
• If the setting is changed, the pulse spacing is changed.
• Max. pulse frequency = 1 / (pulse width + minimum off time)
• Even before the unit changes from pulse operation to a continuous pulse, the
minimum off time never falls below the set parameter value.
• Setting source: heating/cooling limit and heating/cooling dead zone adjustable
(see diagram in section 4.11)
• For burner and valve control a maximum of 8 outputs is available in 128 mode
(a maximum of 6 in 108 mode).
• If required, a relay for external switchover between heating and cooling can be
controlled by the heating/cooling 1 and 2 outputs (mode 128) or outputs 7 and 8
(mode 108).
⇒ output inactive: cooling
output active: heating
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