User Guide

TStatSpec
TM
35
Procedure:
Click the T7350 thermostat controller in the workspace to
open the configuration dialog box. Choose Equipment Control
tab, if not already displayed.
Fig. 33. Configuring Equip Control page
Following section explains about each field in this screen:
Heating Selections:
FAN ON WITH HEAT:
This field specifies the selection of fan operation:
OFF with Heat:
The equipment (i.e. plenum switch) controls the fan operation
in heat mode. The thermostat controls the fan operation in
cool mode.
ON with Heat:
The thermostat controls the fan operation in both heat and
cool modes.
EXTENDED FAN OPERATION:
This option allows the user to configure the time for extended
fan operation after heating turns off. The choices are No
Extend Op(0) or Extend 90 sec( 90 sec).
HEATING CYCLING RATE:
This option allows the user to configure the heating cycling
option for standard or fast response systems. Available
choices are: Slow 3 cph (standard response), Med 6 cph
(medium), Fast 9 cph (fast), and Fast!! 20 cph (super fast).
ENABLE HEATING OAT LOCKOUT:
This option is enabled only if the outdoor air temperature input
is configured in the General page. This will enable the heating
lockout based on the outdoor air temperature.
HEATING OAT LOCKOUT:
This option is available only if the outdoor air temperature
input is configured in the General page and Enable Heating
OAT Lockout option is selected. If outdoor air temperature is
greater than Heat Lockout Setpoint then the heating is locked
out.
ENABLE HEATING DAT HI LIMIT:
This option is enabled only if the discharge air temperature
input is configured in the General page. This will enable the
usage of the discharge air high limit.
HEATING DAT HI LIMIT:
This option is available only if the discharge air temperature
input is configured in the General page and Enable Heating
DAT Hi Limit option is selected.
Cooling Selections:
EXTENDED FAN OPERATION:
This option allows the user to configure the time for extended
fan operation after cooling turns off. The choices are No
Extend Op(0) or Extend 40 sec( 40 sec).
COOLING CYCLING RATE:
This option allows the user to configure the cooling cycling
option for standard or fast response systems. Available
choices are: Std 3 cph (standard response), Fast 4 cph( fast).
ENABLE COOLING OAT LOCKOUT:
This option is enabled only if the outdoor air temperature input
is configured in the General page. This will enable the cooling
lockout based on the outdoor air temperature.
COOLING OAT LOCKOUT:
This option is available only if the outdoor air temperature
input is configured in the General page and Enable Cooling
OAT Lockout option is selected. If outdoor air temperature is
less than the Cooling OAT Lockout setpoint then cooling is
locked out.
ENABLE COOLING DAT LOW LIMIT:
This option is enabled only if the discharge air temperature
input is configured in the General page. This will enable the
usage of discharge air low limit.
COOLING DAT LOW LIMIT:
This option is available only if the discharge air temperature
input is configured in the General page and Enable Cooling
DAT Low Limit option is selected.
CONFIGURE LOOP TUNING:
This section allows the user to configure the loop tuning
parameters.
THROTTLING RANGE:
This screen allows the user to configure the heat and cool
throttling ranges. TStatSpec™ automatically modifies the heat
and cool throttling ranges when the number of stages
configured is changed.
For a conventional RTU:
Cool Stages = configured cool stages
Heat Stages = configured heat stages
For a heat pump RTU:
Cool Stages = configured compressor stages (cool stages)