Settings And Adjustments - Honeywell W6215 Series Product Data

W6215, W7215, W7460 ECONOMIZER LOGIC MODULES
Table 3. W6215, W7215, W7460 Economizer Purge,
Shutdown, and Air Change I/O Logic.
INPUTS
Shut- Air
a
Purge down Change
On - -
Off On -
Off On
a
Purge present only on W6215A, W7215A, and W7460A.
Shutdown
One contact closure shuts down all systems. When terminals
SD and SD1 connect through relay contacts or a jumper:
1. Outdoor damper drives fully closed.
2. Exhaust fan turns off.
3. Indoor fan turns off.
Air Change
When terminals AC and AC1 connect through relay contacts
or a jumper:
1. Outdoor damper drives fully open.
2. Exhaust fan turns on.
3. Indoor fan turns on.
NOTE: With Purge, Shutdown, and Air Change de-
energized, Exhaust will be de-energized unless the
signal exceeds the exhaust fan setpoint; other logic
module functions remain unaltered.

SETTINGS AND ADJUSTMENTS

Potentiometers with screwdriver adjustment slots, located on
the device face, provide adjustments for several parameters
(see Fig. 5 for locations on device):
— ISI setpoint.
— OSI setpoint (W7215B and W7460B only).
ISI
Below set High (Free Cooling LED Off)
(ISI LED Off)
Low (Free Cooling LED On)
Above set High (Free Cooling LED Off)
(ISI LED On)
Low (Free Cooling LED On)
a
For single enthalpy control, the module compares outdoor enthalpy to the ABCD setpoint.
b
If both stages of cooling are off, the system is off and the damper is at:
c
W6215, W7460: Modulation, based on the mixed air sensor signal, between minimum and maximum positions.
W7215: Modulation, based on the mixed air sensor signal, between minimum and full-open positions.
d
Modulation, based on the ISI, between minimum and maximum positions.
e
Modulation, based on the greater of ISI and mixed air sensor signals, between minimum and either maximum position (ISI) or
fully open (mixed air signal).
NOTE: Each sensor has it's own setpoint for threshold and LED indication.
63-2544—3
OUTPUTS
Unit Indoor
Damper Control Fan
Fully Closed Off Off
Fully Open On
Table 5. W6215, W7215, W7460 Economizer I/O Logic.
INPUTS
a
Enthalpy
Outdoor
— Minimum damper position.
— Maximum damper position.
— Enthalpy changeover.
— Exhaust setpoint (W6215A, W7215A and W7460A only).
Indoor Sensor Input Setpoint
Exhaust
On The logic module modulates the outdoor damper to provide
ventilation based on the 2-10 Vdc ISI. With no cooling signal,
Off
the ISI overrides the outdoor air damper when ventilation
On
requires outdoor air.
Outdoor Sensor Input Setpoint
(W7215B and W7460B only)
The OSI logic operates from a 2-10 Vdc sensor signal. The
operation of these logic modules is slightly different from the
other models, see Table 4.
Table 4. W7215B and W7460B OSI Operation.
OSI
Below set Below set Modulates
Above set Modulates
Above set Below set Fully closed On
Above set Modulates
a
Modulation based on signal from mixed air sensor.
b
With ISI signal greater than mixed air sensor signal:
Modulation, based on ISI signal, between minimum and
maximum positions.
c
With ISI signal less than mixed air sensor signal:
Modulation, based on mixed air sensor signal, between:
M7215B: Minimum and full open positions
M7460B: Minimum and maximum positions.
d
Modulation based on mixed air sensor signal; Alarm terminals
connect to energize warning light, audio alarm, or air cleaner.
b
Return Y1
Low On
On
High On
On
Low On
On
High On
On
• Minimum position if ISI is below setpoint.
• Modulating if ISI is above setpoint.
6
ISI Actuator OSI LED
Off
a
b
c
Modulates
On
d
OUTPUTS
b
Y2 Damper
On Minimum position On
Off
On c
Modulating
Off
On
d
Modulating
Off
On
e
Modulating
Off
Alarm
Off
Off
On
Compressor
1 2
On
On Off
On Off
Off Off
On On
On Off
On Off
Off Off