Variable Frequency Drives - Greenheck ERCH-20 Installation, Operation And Maintenance Manual

Variable Frequency Drives

Optional factory-installed, wired, and programmed
variable frequency drives (VFDs) may have been
provided for modulating or multi-speed control of the
blowers and energy recovery wheel for economizer and
frost control modes. One VFD, either Yaskawa model
V1000 or J1000, is provided for each blower (supply air
and exhaust) and one Yaskawa model J1000 is provided
for the energy recovery wheel.
Refer to the tables in this section for factory settings
and field wiring requirements. Refer to the unit control
center for unit specific wiring diagram. When making
adjustments outside of the factory set points, refer to
Yaskawa VFD instruction manual, which can be found
online at www.drives.com. For technical support,
contact Yaskawa direct at 1-800-927-5292.
R+ R- S+ S- IG
P1 P2 PC A1 A2 +V AC AM AC MP
S1 S2 S3 S4 S5 S6 S7 HC SC H1 RP MA MB MC
V1000
0-10 VDC CONTROL SIGNAL (BY OTHERS)
A1 AC
WIRED TO A1 (+) AND AC (COMMON)
0 VDC=30 Hz
10 VDC=60 Hz
FOR ONE 0-10 SIGNAL, WIRE TO DRIVES IN PARALLEL
SEE VFD INSTALLATION MANUAL FOR MORE DETAIL
FOR CONTINUOUS 60Hz OPERATION JUMPER TERMINALS A1 AND +V.
OPTION 2 - MULTI SPEED CONTROL
USER TO PROVIDE CONTACTS AND ISOLATION
AS REQUIRED
NEITHER S4 OR S5 CONTACT CLOSED
S4 S5 SC
DRIVE SPEED = 60 Hz.
S4 TO SC CONTACT CLOSED (BY OTHERS)
DRIVE SPEED = 40 Hz.
S5 TO SC CONTACT CLOSED (BY OTHERS)
DRIVE SPEED = 30 Hz.
SEE VFD INSTALLATION MANUAL FOR MORE DETAIL
TO CHANGE THE FACTORY SET Hz CHANGE THE FOLLOWING PARAMETERS.
PARAMETER A1-01 CHANGE TO 2
PARAMETER d1-01 FOR NEW 60Hz SETTING
PARAMETER d1-02 FOR NEW 40Hz SETTING
PARAMETER d1-03 FOR NEW 30Hz SETTING
PARAMETER A1-01 CHANGE TO 0
®
Factory Set Points
Variable frequency drives (VFDs) for the blowers are
factory setup to operate in one of the three following
modes:
• Modulating: 0-10 VDC signal wired in the field by
others varies the speed of the blower between 30
and 60Hz
• Multi-speed: Digital contact closures by others
command the VFD to run at multiple speed settings:
• CO
S1 S2 S3 S4 S5 SC A1 +V AC AM AC MA MB MC
J1000
The terminal locations for Modulating and Multi-speed
are shown on the previous page. Most of the set points
in the VFDs are Yaskawa factory defaults. However, a
few set points are changed at Greenheck and are shown
in the tables. These settings are based on the VFD
mode selected.
Change Set Points
To gain access to change set points on the V1000 and
J1000 drives, parameter A1-01 needs to be set at "2".
To prevent access or tampering with drive settings on
either drive, change parameter A1-01 to "0".
• Drive Operation
Resetting the V1000 drive to factory defaults
To reset the V1000 drive back to Greenheck factory
defaults go to parameter A1-01 and set it to "2". Then
go to A1-03 and change it to "1110" and press enter.
The drive is now reset back to the settings programmed
at Greenheck. This option is not available on the J1000.
Energy Recovery Ventilator with Heating and Cooling
- Open - Drive runs at 60Hz
- SC to S4 - Drive runs at 40Hz
- SC to S5 - Drive runs at 30Hz
Sensor:
2
Set Point Control: A carbon dioxide sensor is
provided from the factory for field-mounting OR
unit mounting in the space(s) being served by the
energy recovery unit. The CO
to the unit VFD's with two preset speeds of 700
PPM or less CO = 50% fan speed and 800 PPM
2
or greater CO = 100% fan speed.
2
Proportional Control: A carbon dioxide sensor is
provided from the factory for field-mounting OR
unit mounting in the space(s) being served by the
energy recovery unit. The CO
to the unit VFD's with default factory settings
of 500 PPM or less CO
2
1000 PPM or greater CO
Modulation of VFD occurs proportional to CO
between 500 and 1000 PPM.
- SC to S1 contact for On/Off
- A1 (0-10 VDC) referenced to AC
Can use +15 VDC from +V
General Description - NOT model specific
sensors are wired
2
sensors are wired
2
= 50% fan speed and
= 100% fan speed.
2
2
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