Carrier 42 SERIES Application Data page 26

Fan coil units control selection guide for fan coil air conditioners
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PIPING COMPONENTS (cont)
SYMBOL/SKETCH
DESCRIPTION
STRAINER: Y-type body with
50 mesh stainless steel screen.
Application - Used for removal of small
particles from system water during
normal system operation. Should not
be used in lieu of main system
strainers. Strainer screen may have to
be removed during initial high pressure
system flushing during start-up.
Screen should be removed and cleaned
per normal maintenance schedule
(provisions for strainer blow-down
not provided).
GATE VALVE: Manual shut-off valve.
Application - Used for unit isolation
during system flushing, servicing, etc.
Do not use for water balancing.
GLOBE VALVE: Standard pattern,
manual shut-off and throttling valve.
Application - Used for unit isolation.
Not recommended for high flow rates
due to relatively high pressure drop.
COMPRESSION STOP VALVE:
Manual shut-off valve.
Application - Used for unit isolation
during system flushing, servicing, etc.
Not recommended for high flow rates
due to relatively high pressure drop.
BALL VALVE: Manual balance and
shut-off valve.
Application - Used for unit isolation
and water flow balancing. Without
memory stop feature water balance
point must be marked by installer (if
necessary). Check specifications for
service fittings required when used for
water balancing.
BALL VALVE WITH MEMORY STOP:
Manual balance and shut-off valve.
Application - Used for unit isolation
and water flow balancing. The adjust-
able memory stop feature allows return
to the balance point after shut-off.
Check specifications for service
fittings required when used for
water balancing.
C V FACTOR
1
2
9.0
19.0
Clean
Clean
19.8
36.0
1.8
2.3
4.0
4.0
26
RATING
3
PSI
F
4
400
250
200
200
3.9
200
200
5.4
150
200
7.5
400
200
7.5
400
200
STEAM
USE
N/A
NO
NO
NO
YES
N/A

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