Honeywell 7800 Series Product Data page 46

7800 SERIESS7800A2142 4-Line LCD Keyboard Display Module
Because of these configuration constraints the minute and seconds digits increment/
decrement in steps that force the time into these allowed settings.
Fig. 70. Commission valve proving time
The up and down arrow buttons are used to increment/decrement the minutes and
seconds digits in the edit line. The right and left arrow buttons are used to tab to the save
commands, "Yes" and "No". When the input focus is on the save commands the up and
down arrow buttons scroll between "Yes" and "No". When the time is set to the desired value
the "Yes" command is selected and the OK button is pressed to commit the change. If the
user decides not to save the time and exit commissioning, the "No" command is selected
and the OK button is pressed.
When the setting is commissioned into the burner control module ("Yes" command is
selected) the next page displayed is one of the following (directed by the burner control
module):
• Postpurge time commission (when postpurge time is supported in BC) – see Fig. 71
• Valve Proving (VP) when confirmation (when postpurge time is not supported in BC) –
see Fig. 72
When postpurge time is supported in the burner control module it is configured in the
following page (see next figure). Postpurge time is the time that the combustion fan
remains energized after the burner is directed to stop (leave RUN). The current setting is
displayed allowing the user to change it to a new value. This time parameter has a range of
0-63 minutes with times that must be set in the following manner (same as VP time):
• 0-60 seconds in 1 second increments
• 1-10 minutes in 10 second increments
• 10-63 minutes in 1 minute increments
Because of these configuration constraints the minute and seconds digits increment/
decrement in steps that force the time into these allowed settings.
Fig. 71. Commission Postpurge time
The up and down arrow buttons are used to increment/decrement the minutes and
seconds digits in the edit line. The right and left arrow buttons are used to tab to the save
commands, "Yes" and "No". When the input focus is on the save commands the up and
down arrow buttons scroll between "Yes" and "No". When the time is set to the desired value
the "Yes" command is selected and the OK button is pressed to commit the change. If the
user decides not to save the time and exit commissioning, the "No" command is selected
and the OK button is pressed.
When the setting is commissioned into the burner control module ("Yes" command is
selected) the next page displayed is one of the following (directed by the burner control
module):
• Valve Proving (VP) when confirmation (when BC model supports valve proving) – see
next figure
• Postpurge time confirmation (when BC model doesn't support valve proving) – see Fig.
74
The user is asked to confirm the valve proving when option setting in the following page
(see next figure). The option setting is displayed on the page, and the user confirms it with a
"Yes" answer or declines it with a "No" answer.
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