14
TYP I CAL AD JUST MENTS
1.
Economizer ENTH CURVE Setpoint
a.
Only the coolest, driest outside air is used for
economizer operation when parameter “ES5" is
selected on the SETPOINT MENU. Select
parameter “ES1” on the SETPOINT MENU for the
greatest energy savings.
b.
Adjustments are ES1, ES2, ES3, ES4, ES5.
c.
“ES3” is the default setting.
d.
Economizer ENTH CURVE Setpoint can be
adjusted at any time and may need adjustment for
jobsite conditions.
JADE™ECONOMIZER MOD ULE
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
2.
EXH1 SET
- Adjustments for (optional) power exhaust.
a.
The outside air damper position at which the
power exhaust fan(s) will engage.
b.
With 2-speed indoor fan units EXH1 L (low speed
fan) and EXH1 H (high speed fan) settings are
required.
c.
Default for EXH1 L is 65% and EXH1 H is 50%.
d.
After the outside air damper output command
DAMPER OUT (not ACT POS.) reaches the
power exhaust setpoint, the power exhaust output
EXH1 is energized after a 45 second delay.
e.
Range of adjustment is from 0-100% outside air.
e.
Single enthalpy strategy: If outdoor air enthalpy is
lower than the ENTH CURVE setpoint, then free
cooling is available.
f.
Dual enthalpy strategy: ENTH CURVE Setpoint is
not used. If outdoor air enthalpy is lower than
return air enthalpy, then free cooling is available.
There is also a high limit boundary for dual
enthalpy. The high limit boundary is “ES1” when
there are no stages of mechanical cooling
energized and "HL" when a compressor stage is
energized.
3.
EXH2 SET
- Adjustments for (optional) 2 speed power
exhaust.
a.
The outside air damper position at which the 2nd
speed of the power exhaust fan(s) will engage.
b.
With 2-speed indoor fan units EXH2 L (low speed
fan) and EXH2 H (high speed fan) settings are
required.
c.
Default for EXH2 L is 80% and EXH2 H is 75%.
d.
After the outside air damper output command
DAMPER OUT (not ACT POS.) reaches the
power exhaust setpoint, the power exhaust output
EXH2 is energized after a 45 second delay to
allow the damper to reach the appropriate
position.
e.
Range of adjustment is from 0-100% outside air.
