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Access 4.x |
Heating/Cooling sequences > Starting order of the fan compensation sequences |
Note! This chapter is only valid for Access 4.5-1-01 and later revisions
The fan compensation sequences normally starts in the standard order, meaning that the higher start priority number it has - the later it will be activated.
Under special conditions the fan compensation sequences are required to start despite their priority number. This is achieved by enabling the jump to fan compensation sequences.
Once the jump function is enabled, the fan compensation sequence is activated while all of the following conditions are met:
- Room/extract cascade (outdoor compensated) setpoint is not reached.
- "Actual setpoint supply air" is within the minimum and maximum range.
- The first two conditions have been present for the set time (default 10 min).
While jump function is active - the starting order of the fan compensation sequences is determined by their position in the sequence list (SEQ-A has highest priority... SEQ-J has the lowest priority).
e.g.:
Position |
Heating |
Cooling |
Start Heating |
Start Cooling |
Name |
|
SEQ-A |
9 |
Off |
0% |
0% |
Heating 3 (El. heater) |
|
SEQ-B |
1 |
1 |
0% |
0% |
Exchanger |
|
SEQ-C |
4 |
Off |
0% |
0% |
Heating 1 (Run-around) |
|
SEQ-D |
2 |
2 |
0% |
0% |
Recirculation 1 |
|
SEQ-E |
3 |
3 |
0% |
0% |
Recirculation 2 |
|
SEQ-F |
6 |
5 |
0% |
0% |
Fan compensation 1 |
← Will start 1st |
SEQ-G |
5 |
Off |
0% |
0% |
Heating 2 (DX or water) |
|
SEQ-H |
Off |
4 |
0% |
0% |
Cooling 2 (DX or water) |
|
SEQ-I |
7 |
6 |
0% |
0% |
Fan compensation 2 |
← Will start 2nd |
SEQ-J |
8 |
7 |
0% |
0% |
Fan compensation 3 |
← Will start 3rd |
Configuration of jump to fan compensation sequences |
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Variable |
Available options & Selection |
Note |
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Enabling jump to sequences |
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Configuration > Functions > Function activation |
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Run fan setpoint comp. to increase cool/heat capacity at min/max supply air setpoint |
| Yes | No | |
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Operational settings |
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Data & Settings > Temperature control > Supply air controller |
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Min limit supply air |
[12.0] oC |
Conditions to engage jump to sequences: 12-1 oC < Supply air temperature 30+1 oC > Supply air temperature is longer than 10 minutes |
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Max limit supply air |
[30.0] oC |
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Room/Extract air min setpoint deviation to run fan setpoint comp. |
[1] oC |
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Start delay fan setpoint compensation |
[10] min |
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Chapter info
Last reviewed: 11/29/2021
Access version: 4.6-0-14 (3045)