Programming instructions

Programming equipment settings

Notes about duty cycles

 Duty cycles always start with the ON duration.

 When Power Blocks restart after a power failure, duty cycles restart with the ON duration. If the

duty cycles resetting could cause a problem at your site, timed events are another option to

consider. For more information, read Programming timed events on page 59.

 The minimum ON or OFF duration is 5 seconds (0:00:05 hours:minutes:seconds).

 The maximum ON or OFF duration is 5 hours (5:00:00 hours:minutes:seconds)

 When there is a change to the settings:

PBx Power Blocks immediately switch to the ON duration as soon as the Power Block receives

the settings change.

PB-1 to PB-5 Power Blocks must complete their current ON or OFF duration before any

settings changes will take effect. For example, if you have a five-hour duty cycle that just started

an ON or OFF duration and you change it to a ten-minute duty cycle, you will have to wait for

the five-hour duration to complete before the new settings will take effect.

The Ventilation settings window is where you program single-stage heating and cooling relays.

A This button displays the relay settings.

B This is where you select the relay you want to program.