Section 15: Variable Frequency Drive Programming For Use With Corayvac; System With Modulating Thermostat; Vfd Parameter Settings For Use With Modulating Thermostats - Roberts Gorden Corayvac CRV-B Series Installation, Operation & Service Manual

CRV-S I , O
ERIES NSTALLATION PERATION AND

SECTION 15: VARIABLE FREQUENCY DRIVE PROGRAMMING FOR USE WITH CORAYVAC

WITH MODULATING THERMOSTAT
15.1 VFD Parameter Settings For Use With
Modulating Thermostats
The VFD parameters come with factory default set-
tings. The following parameter settings must be
changed for modulating thermostats. Settings can
only be altered when the pump motor is stopped.
Verify that there is power to the VFD (LCD display will
be on) and modulating thermostat is set to off.
DANGER
Electrical Shock Hazard
Enclosure contains live electrical
components.
Programming must be done by a trained
technician only.
Replace cover before operating.
Failure to follow these instructions can result
in death or electrical shock.
To override the rotary disconnect switch inside the
VFD enclosure, turn the square rod with a wrench to
the ON position. In order to be able to close the cover
of the disconnect, the rods need to be turned back to
the OFF position.
15.1.1
To enter the PROGRAM mode and access the
parameters, press the Mode button. This will activate
the PASSWORD prompt (if the password has not
been disabled).
Display reads "00"
Upper right decimal point blinks
15.1.2
Use the arrow buttons to scroll to the password value
68 of 85
S M
ERVICE ANUAL
0 0
(the factory set password is 225).
Press Mode to enter password.
Once the correct password value is entered, the dis-
play will read "P01", which indicates that the
PROGRAM mode has been accessed at the begin-
ning of the parameter menu (P01 is the first
parameter).
2 2 5
P 0 1
NOTE: If the display flashes "Er", the password was
incorrect, and the process to enter the password
must be repeated.
15.1.3 Use the arrow buttons to scroll to the desired
parameter number. For new parameter settings See
Page 67 , Section 14.2.
15.1.4 Once the desired parameter number is found:
Press Mode to display present parameter setting
(example setting is 20.0).
Upper right decimal point blinks.
Use arrow buttons to change setting.
Press Mode to store new setting and exit the
program mode.
15.1.5 To change another parameter, press the
Mode key again to re-enter the PROGRAM mode
(the parameter menu will be accessed at the
parameter that was last viewed or changed
before exiting).
If the Mode key is pressed within two minutes of exit-
ing the PROGRAM mode, the password is not
required to access the parameters. After two minutes,
the password must be entered in order to access the
parameters again.
® SYSTEM