Honeywell JADE W7220 Manual page 18

JADE™ ECONOMIZER MODULE
ECONOMIXING
AVAILABLE
NOT AVAILABLE
TEMPERATURE
Enthalpy Temp.
Curve Dry-Bulb (°F)
ES1 80.0
ES2 75.0
ES3 70.0
ES4 65.0
ES5 60.0
HL 86.0
To use enthalpy the W7220 must have a C7400S Sylkbus
sensor for OA. The W7220 calculates the enthalpy and dew
point using the OA temperature and humidity input from the OA
sensor. When the OA temperature, OA humidity and OA dew
point are all below the selected boundary, the economizer sets
the economizing mode to YES, economizing is available.
Economizer Setup and Configuration
To setup and configure the Economizer module, use the
System Setup menu, the Advanced Setup menu (if necessary),
and the Setpoints menu. Refer to Table 7.
Setup and configure the module in the following order:
1. Enter the System Setup parameters.
2. If needed, enter the Advanced Setup parameters.
3. Enter the Setpoint settings.
To make a parameter or setpoint change:
 
1. Use the
and buttons to move to the desired menu.
↵
2. Press the
button (Enter) to display to the first
parameter.
 
3. Use the
and buttons to move to the desired
parameter.
63-2700—05
Fig. 16. Single Enthalpy curve and boundaries.
Table 6. Single Enthalpy and Dual Enthalpy High Limit Curves.
Temp. Enthalpy
Dewpoint (°F) (btu/lb/da)
60.0 28.0
57.0 26.0
54.0 24.0
51.0 22.0
48.0 20.0
66.0 32.4
SINGLE ENTHALPY
ES5
Point P1
Temp. °F Humidity %RH
80.0 36.8
75.0 39.6
70.0 42.3
65.0 44.8
60.0 46.9
86.0 38.9
When all of the OA conditions are above the selected
boundary, the conditions are not good to economize and the
mode is set to NO.
Fig. 16 shows the 5 current boundaries. There is also a high
limit boundary for differential enthalpy. The high limit boundary
is ES1 when there are no stages of mechanical cooling
energized and HL when a compressor stage is energized.
Table 6 provides the values for each boundary limit.
↵
4. Press the
button (Enter) to select the parameter and
display its value.
 
5. Use the and
decrease the parameter value.
↵
6. Press the button (Enter) to store the new value for the
parameter.
7. CHANGE STORED displays.
↵
8. Press the button (Enter) to return to the current menu
parameter.
9. Repeat steps 4 through 8 for each parameter you want to
change.
10. When finished, press the
return to the previous menu.
11. Repeat the above steps for each of the three menus -
System Setup, Advanced Setup, and Setpoints.
18
DUAL ENTHALPY
HIGH LIMIT
P2 (T,RH)
P1
(T,RH)
ES4 ES3 ES2 ES1 HL
M32286A
Point P2
Temp. °F Humidity %RH
66.3 80.1
63.3 80.0
59.7 81.4
55.7 84.2
51.3 88.5
72.4 80.3
buttons to change or increase/
button (MenuUp/Exit) to