TECHNICAL DATA 5
Zone Valve Engineering & Installation
Reference Notes
Locating & Mounting
Electric valves, like all other mechanical
equipment, should be installed with a degree of
accessibility to enable quick and economical
servicing or replacement. On high rise
buildings, use reducing valves on branch lines
on lower floors.
Note For Fan Coil Installations
Valve motor and gear train will not function
properly when wet. Motor housing must be
protected from drippage. Motor housing need
not be protected from condensation on its
attached valve body when installation in
horizontal piping, if valve is positioned within 85
o
of upright position, (See Fig. 1). When
mounted in vertical piping, motor housing must
be protected from drippage.
Valves with Sweat Connections
Prior to soldering, place valve in manually open
position by moving lever to retaining notch.
Ends of water supply tubing must be thoroughly
clean for a minimum distance of 25 mm from
end.
Instructions for Sweating
Use only lead or tin based solder with melting
point below 300
o
C. Do not overheat valve body.
CAUTION
This valve is not intended for use with systems
that require frequent mark-up water. Systems
which are primarily for domestic hot water
supply are sometimes also used for heating
purposes. In this type of application, the large
volume of mark-up or fresh water will contain
dissolved oxygen and minerals which can cause
early valve failure.
The specification above are normal and conform to generally
acceptable industry standard. Cyrus is not responsible for
damages resulting from misapplication or misuse of its products.
Normal Use
All zone valves designed to provide a useful life of at least
100,000 cycles. A cycle being defined as operation of the
zone valve to its normal stop and then allowing it to return
its normal position.
Manual Operating Lever
When valves are placed in the open position with the
manual lever, the paddle is removed from the seat or port.
This must be done prior to soldering sweat valves. Move
the lever slowly to the open position and hold in the
retaining notch until the gear is taken up by the
return spring.
THE MANUAL LEVER WILL RESET TO THE
AUTOMATIC POSITION THE FIRST TIME
THE VALVE IS CYCLED ELECTRICALLY.
Figure 1 Mounting position