39
2SP H/C (2 Speed Heat/Cool) Fan Operation (single phase
units only)
The W7220 controller does not actually control the fan
speed or the heat output of the unit, and only uses this infor-
mation to help determine the damper position. On single
phase units, the unit control board (UCB) will reduce the fan
speed during heating when the configured fan speed is set
outside the optimized heating speed window. If the job site
application forces this reduction in fan speed during heat, the
economizer FAN TYPE must be set to keep the appropriate
outside air intake.
On single phase 48FC 3 to 5 ton units, if reduced the heat-
ing fan speed is lower than the cooling speed and the econo-
mizer FAN TYPE needs to be set to 2SP H/C (2 speed Heat/
Cool). This indicates that the heating and vent mode fan
speed is less than then cooling mode fan speed in the unit.
Refer to Table 16 for economizer operation.
3 Speed Fan Operation
FAN TYPE = 3SPEED is not used on 48FC units.
Table 16 — Economizer Operation - FAN TYPE = 2SP H/C
*With stage 3 delay (STG3 DLY) in Advanced setup, COOL Y2-OUT will be turned ON after the delay time specified.
N/A = Not applicable
INPUTS
OUTPUTS
DEMAND
CONTROLLED
VENTILATION
(DCV)
OUTSIDE AIR
GOOD TO
ECONOMIZE
W
(HEAT ON)
COOL
Y1-IN
COOL
Y2-IN
COOL
Y1-OUT
COOL
Y2-OUT
FAN SPEED
(reference
only)
DAMPER POSITION
OCCUPIED
UNOCCUPIED
NONE
NO
ON
N/A
N/A
OFF
OFF
LOW
MIN POS L
Closed
OFF
OFF
OFF
OFF
OFF
LOW
MIN POS L
Closed
OFF
ON
OFF
ON
OFF
HIGH
MIN POS H
Closed
OFF
ON
ON
ON
ON
HIGH
MIN POS H
Closed
YES
ON
N/A
N/A
OFF
OFF
LOW
MIN POS L
Closed
OFF
OFF
OFF
OFF
OFF
LOW
MIN POS L
Closed
OFF
ON
OFF
OFF
OFF
HIGH
MIN POS H to
Full Open
Closed to
Full Open
OFF
ON
ON
ON
OFF*
HIGH
MIN POS H to
Full Open
Closed to
Full Open
Below CO
2
Set
NO
ON
N/A
N/A
OFF
OFF
LOW
VENTMIN L
Closed
OFF
OFF
OFF
OFF
OFF
LOW
VENTMIN L
Closed
OFF
ON
OFF
ON
OFF
HIGH
VENTMIN H
Closed
OFF
ON
ON
ON
ON
HIGH
VENTMIN H
Closed
YES
ON
N/A
N/A
OFF
OFF
LOW
VENTMIN L
Closed
OFF
OFF
OFF
OFF
OFF
LOW
VENTMIN L
Closed
OFF
ON
OFF
OFF
OFF
HIGH
VENTMIN H to
Full Open
Closed to
Full Open
OFF
ON
ON
ON
OFF*
HIGH
VENTMIN H to
Full Open
Closed to
Full Open
Above CO
2
Set
NO
ON
N/A
N/A
OFF
OFF
LOW
VENTMIN L to
VENTMAX L
Closed
OFF
OFF
OFF
OFF
OFF
LOW
VENTMIN L to
VENTMAX L
Closed
OFF
ON
OFF
ON
OFF
HIGH
VENTMIN H to
VENTMAX H
Closed
OFF
ON
ON
ON
ON
HIGH
VENTMAX H to
VENTMAX H
Closed
YES
ON
N/A
N/A
OFF
OFF
LOW
VENTMIN L to
VENTMAX L
Closed
OFF
OFF
OFF
OFF
OFF
LOW
VENTMIN L to
VENTMAX L
Closed
OFF
ON
OFF
OFF
OFF*
HIGH
VENTMIN H to
Full Open
Closed to
Full Open
OFF
ON
ON
ON
OFF*
HIGH
VENTMIN H to
Full Open
Closed to
Full Open
Summary of Contents for WeatherMaker 48FC04-07
Page 4: ...4 Fig 2 Unit Dimensional Drawing 1018 ...
Page 5: ...5 Fig 2 Unit Dimensional Drawing cont 1018 ...
Page 6: ...6 Fig 2 Unit Dimensional Drawing cont 1018 ...
Page 24: ...24 T Fig 42 Typical 48FC 04 07 Power Wiring Diagram 208 230V Unit Shown ...
Page 26: ...26 Fig 45 Typical IGC Control Wiring Diagram UNIT CONTROL BOARD ...
