28
Multi-Stage Constant Volume Units with
Mechanical Thermostat —
To configure the unit, per-
form the following:
1. The unit is shipped with the unit control disabled. Enable
the control by setting Local Machine Disable (Service
Test
→
STOP) to No.
2. Under Configuration
→
UNIT
→
C.TYP, set C.TYP to 3
(TSTAT MULTI).
3. Remove jumpers from R-W2 and W2-W1 on TB4 in the
control box. Connect thermostat to TB4.
4. Under the Setpoints menu, set the following
configurations:
5. See the Economizer Options section on this page for ad-
ditional economizer option configurations.
6. See the Exhaust Options section on this page for addition-
al exhaust option configurations.
Multi-Stage Constant Volume Units with
Space Sensor — To configure the unit, perform the
following:
1. The unit is shipped with the unit control disabled. Enable
the control by setting Local Machine Disable (Service
Test
→
STOP) to No.
2. Under Configuration
→
UNIT
→
C.TYP, set C.TYP to 5
(SPT MULTI).
3. Install jumpers between R-W2 and W2-W1 on TB4 in
the control box.
4. Under the Setpoints menu, the following configurations
should be set:
5. The degrees of demand from the space temperature set
points are configured under the Configuration
→
D.LV.T
submenu. See the Heating Control and Cooling Control
sections for further description on these configurations.
Configure the following set points:
6. Under Configuration
→
UNIT
→
SENS
→
SPT.S, enable
the space sensor by setting SPT.S to ENBL.
7. Under Configuration
→
UNIT
→
CV.FN, set CV.FN to 1
for continuous fan or 0 for automatic fan.
8. To program time schedules, set SCH.N=1 under Config-
uration
→
CCN
→
SC.OV
→
SCH.N to configure the con-
trol to use local schedules.
9. Under the Timeclock
→
SCH.L submenu, enter the de-
sired schedule. See Time Clock section for further
descriptions of these configurations.
10. See the Economizer Options section below for addition
economizer option configurations.
11. See the Exhaust Options section below for addition
exhaust option configurations.
Economizer Options — Under the Configuration
→
ECON submenu, the following set points should be configured:
Configuration
→
ECON
→
EC.MN should always be set for
the minimum damper position.
Indoor Air Quality Options
DEMAND CONTROL VENTILATION — Under Configu-
ration
→
IAQ
→
DCV.C, the following configuration parame-
ters should be set to establish the minimum and maximum
points for outdoor air damper position during demand control
ventilation (DCV):
EC.MN Economizer Min.Position
IAQ.M IAQ Demand Vent Min.Pos.
Configuration
→
IAQ
→
DCV.C
→
IAQ.M is used to set the
absolute minimum vent position (or maximum reset) under
DCV.
Configuration
→
IAQ
→
DCV.C
→
EC.MN is used to set the
minimum damper position (or with no DCV reset). This is also
referenced in the economizer section.
Exhaust Options — The A series units can be config-
ured with CV 2-stage PE or modulating PE. The following
exhaust options should be configured.
Configuration
→
BP
→
BF.CF=1 (Two-Stage Exhaust
Option) — For two-stage exhaust, under the Configuration
→
BP submenu, configure the following:
Configuration
→
BP
→
BF.CF=2 (Modulating Power Exhaust
Option) — For modulating exhaust, in the Configuration
→
BP submenu, configure the following:
Set Clock on VFD (If Installed) — The clock set
mode is used for setting the date and time for the internal clock
of the VFD. In order to use the timer functions of the VFD
control, the internal clock must be set. The date is used to deter-
mine weekdays and is visible in the fault logs. Refer to the
VFD section in Appendix C on page 144 for information on
operating the VFD and using the keypad.
To set the clock, perform the following procedure from the
VFD keypad:
1. Select MENU (SOFT KEY 2). The Main menu will be
displayed.
2. Use the UP or DOWN keys to highlight CLOCK SET on
the display screen and press ENTER (SOFT KEY 2). The
clock set parameter list will be displayed.
SA.HI Supply Air Set Point Hi
SA.LO Supply Air Set Point Lo
OHSP Occupied Heat Setpoint
OCSP Occupied Cool Setpoint
UHSP Unoccupied Heat Setpoint
UCSP Unoccupied Cool Setpoint
GAP Heat-Cool Setpoint Gap
SA.HI Supply Air Set Point Hi
SA.LO Supply Air Set Point Lo
L.H.ON Demand Level Lo Heat On
H.H.ON Demand Level Hi Heat On
L.H.OF Demand Level Lo Heat On
L.C.ON Demand Level Lo Cool On
H.C.ON Demand Level Hi Cool On
L.C.OF Demand Level Lo Cool On
EC.EN Economizer Enabled?
EC.MN Economizer Min.Position
EC.MX Economizer Maximum Position
E.TRM Economizer Trim for SumZ?
E.SEL Econ Changeover Select
OA.E.C OA Enthalpy Change Over Select
OA.EN Outdoor Enthalpy Compare Value
OAT.L High OAT Lockout Temp
O.DEW OA Dew Point Temp Limit
ORH.S Outside Air RH Sensor
BP.P1 Power Exhaust On Setp.1
BP.P2 Power Exhaust On Setp.2
BP.SP Building Pressure Set point
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