Checking Rotation; Sequence Of Operation Without Idle Mode - Conair RG Series User Manual

4 - 2 l O p e r a t i o n
O p e r a t i o n

Checking Rotation

Upon initial start-up, but before normal operation, the RG vacuum pump must be
checked for proper rotation.
1
Set the loading controls to a minimal operating cycle (very low load time
setting of a single receiver, see separate loading control instructions) and check
the pump with no vacuum or exhaust tubing or flex hose installed. Arrows are
provided on the inlet and outlet to indicate proper air direction.
2
Double-check air flow to confirm actual flow direction. If direction is OK,
proceed.
3
If direction is backwards, disconnect power and change any two of the 3
phase leads coming into the pump starter. Upon confirming proper rotation,
reconnect power and complete the tubing installation for operation.
The RG series vacuum pumps operate in response to signals provided from a load-
ing control, located elsewhere, and wired to the pump starter or the Transformer
/Idle Mode Control. Once properly installed, the pump should respond to signals
from the loading system and run according to the Idle Mode timer (if used) and the
loading control. Operation (on-time, etc) is determined solely by the loading and
Idle Mode control systems. The only change to operation that can occur within the
pump assembly itself is a motor overload within the pump starter or a malfunction,
if this occurs (see troubleshooting, Section 6).
Sequence of Operation without Idle Mode Valve
The loading control system determines the need for vacuum power for conveying.
The Vacuum start signal is sent to the pump starter. If this signal is 120 VAC, then
the signal is routed directly to the pump starter. If the signal is 24 VDT, then the
signal passes through the Transformer/Idle Mode Control box, next to the pump
starter. In this set-up, the Idle Mode control is not used, but the same circuit board
and the transformer provide a method for the 24 VDT input to trigger the 120 volt
pump starter.
The pump runs for the duration of the signal from the control.