3VPIFa
JUL 2006
VPIF INSTALLATION DIMENSIONS, INCH (MM)
Figure B
4.86”
(123)
2.75”
(70)
.90 TYP
5.50”
(140)
3.10”
(78)
#17 (.173 REF) DIA
MOUNTING HOLE (TYP) 2.74”
(69) 4.40”
(111)
2 1/2” (65)
STAINLESS
STEEL PIPE
CLAMP
VPIF FIELD MOUNTED VPIF MOTOR MOUNTED
4.72”
(120)
2.36”
(60)
RE-CALIBRATION INSTRUCTIONS FOR
HMMV, HMMR, HMXV, HMMVC, HMMRC,
AND HMXVC*
Hansen Sealed Motor Valves are factory calibrated, and
hold their calibration during shipment, power outages,
etc. Valve disassembly or manual opening with the
MOVT (Manual Operation Valve Tool) does require
subsequent recalibration, therefore after removing or
replacing the 4-20 mA motor of a Sealed Motor Valve,
recalibrate the valve. Recalibration synchronizes the
control input with the valve position; that means, for
example, a 12 mA input (50%) would result in the valve
moving to the half-open position.
Recalibration requires the ability to control the 4-20
mA control input to the motor between four and twenty
milliamps, and requires the ability to allow the valve
to stroke fully open and closed. For valves shipped
after July 4, 2006, or retrofitted valves with VPIF, the
4 mA and 20 mA signal to calibrate the valve is part of
the function of the VPIF. If the valve is not equipped
with a VPIF, then the 4 mA and 20 mA to calibrate must
come from the computer or separate signal generator.
Only qualified refrigeration service personnel should
perform this procedure, and proper precautions taken
to prevent a hazardous or undesirable occurrence
resulting from operating the valve from open and
closed.
1. Secure the refrigeration system to allow the
valve to open and close fully without causing
undesirable system problems to occur.
2. Mount and secure the motor on the sealed motor
valve. Connect electrical wiring in accordance
to the valve and controller manufacturers
specifications.
3. Install “Calibration Key” over ‘X’ on side of motor
and secure with strap.
4. Increase the control input to 20 mA or slightly
greater. Move VPIF switch to up position.
Maintain at least 20 mA for at least two minutes.
This will give the valve time to move to the wide
open position and calibrate its position. Note:
some computer control systems have lag times
before the control input is sent to the valve.
(Using “System Feedback Mode”).
5. Decrease the control input to 4 mA or less. Move
VPIF switch to down position. Maintain 4 mA or
less for at least two minutes. This will give the
valve time to move to the completely closed
position and calibrate its zero point.
6. Again increase the control input to at least 20
mA. Move VPIF switch to up position. Maintain
at least 20 mA for at least two minutes. This
will give the valve time to move to the wide open
position and set its span.
7. The valve should now be calibrated and in the
wide open position.
8. Remove “Calibration Key” and store. The valve
will operate satisfactorily if the “Calibration Key”
remains over the “X”, but the valve will recalibrate
each time the control input is at 4 mA or 20 mA
for more than the two minutes.
9. Return control system to automatic operation.
Place VPIF switch in middle position.
