Greenheck Temperature Control Package v2.0 (461468) - Manual (Page 6)

6
Unit Set-Up Loop (cont’d)
Cool Parameters
Band: 10.0F
Int: 005S
Time Off:
300S
Cool Parameters
Band The dead-band around the cooling set points. The smaller the
band setting, the more sensitive the controller will be to small
temperature changes.
Integration The integration setting (in seconds) is the time necessary for
the integer value to be doubled (i.e. increasing the time setting
decreases the response time).
Time Off For DX cooling only. The delay (in seconds) before an “On”
signal is sent to the compressor upon initial power being
supplied to the controller. This feature provides a safety delay
for the compressors to prevent short-cycling during power
interruption to the controller. This delay will be in addition to
any time delays built into the compressor.
DX Rotation
Btwn Stages: 060S
Btwn Starts:
300S
DX Rotation (2-stage condensers only)
To avoid short-cycling the condensing unit, a time delay between stages and
a time delay between starts may be set. The condensing unit may also have
delays built-in, so ensure compatibility between the times set in the controller
and condenser.
Btwn Stages Minimum time which must elapse between different
compressors turning on.
Btwn Starts Minimum time which must elapse between a compressor
turning off and turning on again.
The controller has stage auto-rotation programmed into it to equalize the
run time between the stages. On a call for cooling, the first stage will be
activated. If, after the time delay, the cooling load is not met, the second
stage will start. When the cooling load is satisfied, the first stage will turn off
and the second stage will continue to run.
Internal Economizer
Select between Inactive and Active. Internal economizer is recommended
when the energy recovery unit provides 100% of the outdoor air. During
economizer mode, the energy wheel is de-activated to enable “free-cooling”.
Refer to page 4 to set the enthalpy at which economizer mode will be
activated.
The controller also has external economizer capabilities. External economizer
is recommended when the energy recovery unit is used in conjunction with
an air-handling unit that has its own economizer section. When the energy
recovery unit gets the economizer signal from the air handler, the supply
blower, outdoor damper, and energy recovery wheel are de-energized. Refer
to the wiring diagram on page 7 for wiring the external economizer contact
into the controller.
Internal Economizer
Inactive
IG Furnace Settings
Min Time On: 2 MIN
IG Furnace Settings (Visible with Indirect Fired Gas Furnace only)
Min Time On The minimum time the furnace stages on.