16
0
6/16 - Subject to change. © Belimo Air
controls
(USA
), Inc
.
2-Speed Fan Setup
ZIP Economizer
Setup and Configuration
2. Connecting them into the following, utilizing the IF connection at the
ECON-ZIP-EM.
Setting up the ZIP Economizer with Variable Frequency Drive.
1. You will need a VFD rated for
supply fan HP.
2. You will need to have a ZIP
Economizer ECON-ZIP-BASE and
an Energy Module ECON-ZIP-EM.
3. You will also need a separate
SPDT relay for integration, and
SPST for fan enabling.
Before Getting Started
Wiring VFD to ZIP Economizer
Wire the VFD according to the manufacturer’s instructions. Ensuring line
voltage to the drive, and wiring the output of the VFD to motor per diagram
below.
Verify that the motor rotation is correct. If not, switch 2 of 3 wires from VFD
to motor.
1. Locate the VFD Digital Inputs, as well as any pertinent High, Low Speed
Designation.
Reference
Drive Control Terminal Description
D
ig
ital Inputs- X1 T
erminal
+24V
Auxiliary voltage output 24 VDC / 250 mA
(reference to GND), short circuit protected.
GND
Auxiliary voltage output common
DCOM
Digital input common. Jumper to GND.
DI1
Start/stop. Jumper to +24V.
DI2
Program to 40 Hz. Wire to SPDT NO contact.
DI3
Program to 60 Hz. Wire to SPDT NC contact.
DI4
Safety interlock. Jumper to +24V.
Example VFD Terminal Designations
Fan enable relay; single pole, single throw
3. Power RTU and enter Settings menu.
Drive
U1
V1
W1
GND
U2
V2
W2
Motor
GND
L3
L2
L1
Input
Programming Indoor Fan Settings
When a VFD is added, up to three (3) additional settings will be required.
a. Low Sp Vent Min – When a 2 Speed strategy is used to save energy,
an additional Vent Min Pos needs to be entered for low speed operation
due to less available static pressure from the fan. This position will be
greater than Vent Min Pos, however equal the same measured airfl ow
rate value.
b. Low Sp DCV Min - When a 2 Speed strategy is used to save energy,
an additional DCV Min Pos needs to be entered for low speed operation
due to less available static pressure from the fan. This position will be
greater than DCV Min Pos, however equal the same measured airfl ow
rate value.
c. Low Exh Fan Pos - When a 2 speed stategy is used to save energy, an
additional Exh Fan On Pos needs to be entered for low speed operation
due to less available static pressure from the fan. This position will be
greater than Exh Fan On Pos, however equal the same measured airfl ow
rate value.
These values should be set to provide the same airfl ow of outside air (OA) and
exhaust as when fan is operating at full speed. Due to less pressure generated
by the fan, this value is typically a higher percentage open value.
+24V
VFD
DI1
(Start/
Stop)
G
C
WARNING
Live Electrical Components!
During installation, testing, servicing and troubleshooting of this
product, it may be necessary to work with live electrical components. Have a
qualifi ed licensed electrician or other individual who has been properly trained
in handling live electrical components perform these tasks. Failure to follow all
electrical safety precautions when exposed to live electrical components could
result in death or serious injury.
The control circuit inputs to the VFD are 24 VDC signals. This voltage is sourced
from the VFD at its terminal strip X1, +24V. The speed inputs are received at X1
terminals (DI--2) for low speed (40HZ) motor operation and (DI--3) for high
speed (60HZ) motor operation. When neither input is present, the VFD will shut
the fan motor off.
Utilizing the nomenclature from the example VFD Terminal Designations table,
pull the following items from the terminal block for Digital Inputs.
Single pole, double throw relay
24V
VFD
IF
C
DI3 (High Sp)
DI2 (Low Sp)
+24V
VFD
DI3
(High Sp)
DI2
(
p)
(Low Sp)
IF
C
RTU Terminal
ECON-ZIP-EM
