Johnson Controls (H,Y,C)IDM030B21E, Engineering Manual

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FEATURES
1-4
TC-16004-rev.2
(2) All Fresh Process in Cooling and Heating Mode
This operation mode is very useful for buildings with many tenants, or for public buildings.
Basically, the damper is fully opened (100% fresh air) when activated through the wired controller (E1
optional function setting).
The following parameters are controlled by the All Fresh process in an independent fashion:
* Thermo ON/OFF status
* Damper opening
* Fan speed
Thermo ON/OFF Status
The general principle is that the compressor remains stopped when the outdoor ambient temperature is
lower than 63
o
F (17
o
C) in cooling mode and higher than 75
o
F (24
o
C) in heating mode.
Damper Opening
The damper is set to be either fully open or closed to the minimum opening to ensure an intake of fresh air
(7% or more of the total outlet air, by the d7 setting).
Additionally, the damper is closed to the minimum opening to ensure an intake of fresh air, under certain
temperature combinations.
Fan Speed
The fan speed is adjusted one tap lower when the air outlet temperature...
* rises higher than 68
o
F (20
o
C) in cooling mode
* drops lower than 86
o
F (30
o
C) in heating mode
In the above cases, the fan speed is changed from high to medium, or from medium to low.
The fan speed is adjusted back to fan setting tap when air outlet temperature returns to the following
ranges:
* 59
o
F (15
o
C) or lower in cooling mode
* 95
o
F (35
o
C) or higher in heating mode
Draft Prevention Control
Additionally, while the All Fresh process is activated, the EconoFresh control keeps monitoring and
comparing several temperature parameters. The damper may be closed to the minimum opening to
ensure the intake of fresh air under certain circumstances, and in order to avoid discomfort and unwanted
changes to room temperature due to inlet outdoor air conditions.
This function is active if the outdoor ambient temperature is
* 9
o
F (5
o
C) higher than the setting temperature in cooling thermo-OFF
* 9
o
F (5
o
C) lower than the setting temperature in heating thermo-OFF
100%
7%
39
(4)
o
F
(
o
C)
Outdoor Temperature
Fresh Ai
r
● Easy Installation
Equipped with AC drain pump to force condensates up to 33-7/16 inch (850mm) in height in relation to the
unit. The pump is automatically enabled when the accumulated water level is too high.
< 33-7/16 inch
(850mm)