Jade Range W7220 - Manual (Page 9)

JADE ™ ECONOMIZER MODULE
9 62-0331—11
Fig. 8. Single Enthalpy curves and boundaries.
Power Up
After the module is mounted and wired, apply power.
Power Up Delay
Upon power up (or after a power outage or brownout), the
W7220 controller module begins a 5 minute power up delay
before enabling mechanical cooling.
Initial Menu Display
On initial start up, Honeywell displays on the first line and
Economizer W7220 on the second line. After a brief pause,
the revision of the software appears on the first line and the
second line will be blank. After another brief moment the
screen will display W7220 on the first line and STATUS on the
second line. Refer to table 3 for menu structure.
Power Loss (Outage or Brownout)
All setpoints and advanced settings are restored a after any
power loss or interruption.
NOTE: If power goes below 18 Vac, the W7220 controller
module assumes a power loss and the 5 minute
power up delay will become functional when
power returns above 18 Vac.
Using the Keypad with Menus
To use the keypad when working with menus:
• Press the  button to move to the previous menu.
• Press the  button to move to the next menu.
• Press the  button (Enter) to display the first item in the
currently displayed menu.
• Press the button (Menu up) to exit a menu’s item and
return to the list of menus.
ECONOMIZING
AVAILABLE
NOT AVAILABLE
TEMPERATURE
ABSOLUTE HUMIDITY
RA
TEMP
RA
HU
M (
%R
H) ENTHALPY
ES4 ES3 ES2 ES1 HL
P2 (T,RH)
DUAL ENTHALPY
HIGH LIMIT
SINGLE ENTHALPY
ES5
P1
(T,RH)
M32286
Table 3. Single Enthalpy and Dual Enthalpy High Limit Curves.
Enthalpy
Curve
Temp.
Dry-Bulb (°F)
Temp.
Dewpoint (°F)
Enthalpy
(btu/lb/da)
Point P1 Point P2
Temp. °F Humidity %RH Temp. °F Humidity %RH
ES1 80.0 60.0 28.0 80.0 36.8 66.3 80.1
ES2 75.0 57.0 26.0 75.0 39.6 63.3 80.0
ES3 70.0 54.0 24.0 70.0 42.3 59.7 81.4
ES4 65.0 51.0 22.0 65.0 44.8 55.7 84.2
ES5 60.0 48.0 20.0 60.0 46.9 51.3 88.5
HL 86.0 66.0 32.4 86.0 38.9 72.4 80.3
a All settings are stored in non-volatile flash memory.