Replacement Parts Instructions - Roberts Gorden Corayvac CRV-B Series Installation, Operation & Service Manual

CRV-S I , O
ERIES NSTALLATION PERATION AND

19.1 Replacement Parts Instructions

DANGER
Electrical Shock Hazard
Disconnect electric before service.
Controller must be properly grounded to an
electrical source.
Failure to follow these instructions can
result in death or electrical shock.
19.1.1 Variable Frequency Drive (VFD)
To replace the Variable Frequency Drive, turn off all
power to the drive assembly at the breaker or discon-
nect switch.
Mark all wires connected to the VFD, noting the ter-
minals that they are secured to. Remove all wires
from the VFD terminals.
Remove the VFD from its mounting plate by remov-
ing the securing screws.
Verify that the input voltage noted on the rating plate
of the VFD matches the input voltage of the old VFD.
Secure the new VFD to the mounting plate with the
screws. Return all wires to the correct VFD terminals.
If possible, it may be easier to partially re-wire the
new VFD before mounting it to the mounting plate.
Turn on power to VFD.
Using procedure described on Page 66, Section
14.1.1 through Page 66, Section 14.1.5, alter parame-
ter according to VFD model and make as shown on
on Page 67 or 69.
19.1.2 Variable Frequency Drive 25 A or 10 A Fuse-
VFD For Modulating Thermostat Only
To replace a fuse, turn off input power to the variable
frequency drive assembly at the breaker or
disconnect switch.
Inside the VFD assembly, open the fuse holder by
pulling down the lever to expose the fuse. Remove
the old fuse and insert a new fuse. Verify the correct
fuse rating, 25 A for 1 HP 120 V VFD or 2 HP 230 V
VFD, 10 A for the.75 HP 230 V VFD, 1 HP 460 V VFD
and 2 HP 460 V VFD. Close the fuse holder. Return
80 of 85
S M
ERVICE ANUAL
power to the VFD assembly and verify that the VFD
LCD screen is on. (dashes displayed). Close the
VFD assembly door.