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DEFLECTION
LARGE "O" RING
NOTICE
TENSION BELTS TO SPECIFICATION
SHOWN ON DRIVE LABEL. OVER
TENSIONING BELTS WILL SEVERELY
REDUCE BELT AND BEARING LIFE.
REPLACEMENT PARTS
BEARINGS
DRIVE ________________________
FREE _________________________
SHAFT _________________________
WHEEL _________________________
INLET CONE
____________________
TO ORDER REPLACEMENT PARTS,
CONTACT: RCD
(REPLACEMENT COMPONENTS DIVISION)
1-800-443-4410
Fig. 24 — Fan Section Label
SMALL
"O" RING
FORCE
(LB.)
STRAIGHT
EDGE
SPAN SCALE
ADJACENT
V-BELT
V-BELT
Fig. 23 — Fan Belt Tension
BELT
SPAN
Water and Steam Coil Piping Recommendations
GENERAL — Use straps around the coil casing or the lifting
holes (see Fig. 25) to lift and place the coil.
To prevent damage to the coil or coil headers: Do not use
the headers to lift the coil. Support the piping and coil con-
nections independently. Do not use the coil connections to
support piping. When tightening coil connections, use a
backup wrench on the nozzles.
Piping practices are outlined in the Carrier System Design
Manual, Part 3, Piping Design. See Tables 6-7 for circuiting data.
WATER COILS — Typically, coils are piped by connecting
the supply at the bottom and the return at the top. See Fig. 25.
This is not always the case, especially if the coil hand has been
changed in the field. Coils must be piped for counterflow; oth-
erwise, a capacity reduction of 5% for each coil row will result.
To ensure counterflow, chilled water coils are piped so that the
coldest water meets the coldest air. Hot water coils are piped so
that the warmest water meets the warmest air.
STEAM COILS — Position the steam supply connection at
the top of the coil, and the return (condensate) connection at the
bottom. The coil tubes must incline downwards toward
the return header connection for condensate drainage. See
Fig. 26-30 and Table 8.
Figure 26 illustrates the normal piping components and the
suggested locations for high, medium, or low-pressure steam
coils. The low-pressure application (zero to 15 psig) can
dispense with the ¼-in. petcock for continuous venting located
above the vacuum breaker (check valve).
19
CAUTION
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