D19
7-11-07
FAN COIL UNIT PIPING PACKAGES
Y Strainer (YS)
An inline fitting designed to allow
water to flow through a built in
removable screen to filter debris or
contaminates. With the water
system isolated, the plug can be
removed from the blowdown leg
and the captured debris removed
from the screen.
Nominal size: 1/2" or 3/4"
Pressure rating: 600 psig max.
Body: Forged brass
Temperature rating: 325ºF max.
Screen: 20 mesh, 304 stainless
steel
Cv: 5.5 (1/2"), 9.0 (3/4")
(Valve with the clean filter)
Aquastat (AQ)
The Aquastat, also called
a summer-winter
changeover switch or
aqua thermostat, is a
switch designed to
automatically change a
room thermostat from
heating to cooling and
back in a 2-pipe system to
be used for both heating and cooling. The switch is attached to
the incoming water pipe with a spring and senses water
temperature.
Switch action: Bimetal snap acting disc SPDT
Setpoint: 75ºF (24ºC) approx, fixed
Differential: 15ºF (8ºC) fixed
Switch rating: 120 Vac, 5.8 FLA, 34.8 LRA (inductive) Pilot duty 125 VA.
Wiring: White (common). Black-White close on temp. rise (82ºF).
Blue-white close on temp. drop (67ºF)
Optional Pressure /
Temperature Test Ports
Location (PTO)
P/T ports allow testing of water
pressure, differential pressure and
water temperature without
interrupting the waterside
operation of the fan coil unit. P/T
Ports when specified are located
on the ball valves as standard
(see BVPT). When P/T ports are
required in another location, such
as directly across the coil, this
PTO option should be specified.
Nominal size: 1/4"
Connection: 1/4" MNPT
Body material: Brass
Pressure rating: 1000 psig max.
Temp. rating: 325ºF max.
Bypass Balancing Valve (BPV)
A ball valve used to balance the water
flow through the bypass circuit of a 3-
way control valve. Manual adjustment
is required. No calibration is provided
at the valve.
Unions (UN)
An optional fitting used to provide a
mechanical connection between the coil
and valve package on horizontal fan coil
units (not available on Hi-Rise units). Can
be connected and disconnected without
the need to cut piping or unsolder a joint.
Y Strainer with Hose Bib
Valve (YSB)
A Y-Strainer with the
addition of a manual ball
valve installed on the
blowdown leg. The valve
has a standard 3/4" garden
hose connection and cap to
allow fluid to be piped to a
container.
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