Watts EMVII-6400-SS - Manual

IOM-EMV II 1 /
4
"-1 1 /
2
"
Description:
The Watts EMVII-6400SS motor valve is an electrically actuated
standard port bronze ball valve with 316 stainless steel ball and
stem.
For
1 ⁄
4
" - 1 1 ⁄
2
" (8-40mm) the actuator utilized is a unidirectional
type with a NEMA 4 enclosure, featuring a shaded pole motor
with a 25% duty cycle rating, hardened steel gear train and an
extended male output shaft for manual override. The installa-
tion section of this manual is broken into two parts 1-valve and
2-electrical.
Prior to installation it is important to familiarize yourself with both
sections so that the unit is properly installed.
Valve Installation
A. The stem seals on your EMVII-6400SS valve may require
periodic adjustment during its’ normal service life, therefore
installations that prevent access to the valve for maintenance
must be avoided. Further, it is important to understand that
no valve’s stem seals will function indefi nitely. Eventually stem
seals will require adjustments. At this point the external leak-
age would start off as a slight seepage and if left unattended
could become signifi cant.
B. All Watts EMVII-6400SS’s utilize bidirectional valves and as
such, can be installed to shut off fl ow in either direction.
C. When piping up the valve be sure that the threads on the mat-
ing pipe are free of excessive grit, dirt or burrs. Take care to
assure that any pipe sealants used are not so excessively ap-
plied to the pipe threads that the valve cavity becomes fouled.
D. The unit can be installed with the actuator portion in either
the vertical or horizontal plane, however for steam or high
temperature applications see Section E.
E. For installations for steam or other high temperature services
your Watts EMVII-6400SS features an electric actuator with
a maximum ambient temperature rating of 150°F. (65.6ºC)
Higher temperatures will result in a signifi cant reduction of the
duty cycle rating and/or damage to electrical components.
Some steam or other high temperature applications may require
that the actuator be installed horizontal to the pipe (on horizontal
piping) to protect the unit from radiant heat. All piping in which
units are installed and any adjacent piping must be insulated to
further reduce the effects of piping radiant heat.
Electrical Installation
NOTE: Prior to making wiring connections, be sure that all exter-
nal wiring and electrical components have been properly selected
to suit the power consumption levels of your particular unit.
Note: Not all voltage/cycle time combinations are available for
every valve size. For specifi c model combinations consult your
Watts distributor or representative.
Sizes: 1 ⁄
4
" - 1 1 ⁄
2
" (8 - 40mm)
1. Your Watts EMVII-6400SS is provided with a total of six (6)
functional terminal connections within the unit. Terminal num-
bers 1, 2, and 3 are connections for the internal SPDT auxiliary
switch, while terminal numbers 4, 5, and 6 are provided for the
operation of the valve.
2. As shipped from the factory the actuator has been mounted in
a mode that makes circuit 4 and 5 the “open valve” circuit and
circuit 5 and 6 the “closed valve” circuit. Note that terminal 4
feeds the open limit switch, terminal 5 is the motor common
and terminal 6 feeds the close limit switch.
Warning: Inadvertent application of power between terminals
4 and 6 will burn out the switches. Before application of power
always recheck your terminal connections.
3. To test the actuator:
a.
Replace actuator cover before application of power.
b. Apply power to terminals 4 and 5 and observe for a “Fully
Open” valve.
c. Apply power to terminals 5 and 6 and observe for a “Fully
Closed” valve.
d. If valve operation is out of phase to your command signal;
meaning if your external control wiring issues an “Open
Valve” command and the unit closes, simply reverse your
terminal 4 and 6 connection.
e. If your unit fails to fully open and/or fully close, check switch
setting and, if required, reset switches per the instructions
contained in subsequent sections of this manual.
Series EMVII-6400SS
Sizes: 1 /
4
"-1 1 /
2
" (8-40mm) Electric Motor Valves
Installation, Operation and Maintenance Manual
Table 1 - Power Consumption
VALVE SIZE VOLTAGE AND MAX
in. mm CYCLE TIME AMPERAGE DRAW
1 ⁄
4
- 1 1 ⁄
2
8 - 40 115 VAC-8 Second 1.6
1 ⁄
4
- 1 1 ⁄
2
8 - 40 115 VAC-35 Second 0.5
1 ⁄ 4 - 1 1 ⁄ 2 8 - 40 24 VAC-40 Second** 2.2
** Requires min 40 VA Transformer.