Carrier 42C Series Product Data page 13

Return-air grilles — Stamped-type return-air grilles are
standard on 42CG,CK,VE,VG,SG,SH,SJ,SU units and
optional on 42VB,VF,SM units. Anodized aluminum
hinged bar-type grilles are installed on 42DF units.
Risers — The 42S Series units can accommodate
(supply and return) and 1-in. (drain) to 2
2-pipe systems. For other applications, such as reverse
return risers or 4-pipe systems, it may be necessary to
accommodate the additional risers.
Condensate drains are available in sizes down to 1-in. for
greater cost economy. Riser size-reducers are factory-in-
stalled on 42SG, SJ, and SH. For risers over 119-in. long,
extension pieces can be furnished for field installation.
NOTE: Risers for the 42SU,SM units are shipped sepa-
rately for field installation and testing before the unit is
installed.
Riser expansion — The 42S Series units are built to
accommodate modest expansion of the external riser. This
only allows for expansion between the unit and the
riser. This allowance for movement within the unit is
not intended to replace necessary riser expansion compen-
sation devices that the consulting engineer may deem
advisable for the external riser system. External riser
expansion/contraction compensation and anchoring are
the responsibility of the consulting engineer and the install-
ing contractor.
Risers material and insulation — The 42S Series unit
supply, return, and drain risers can be furnished in type M
or L copper. All factory-furnished risers are insulated with
flexible closed foam insulation in
ness.
Discharge grilles — Two types of double deflection dis-
charge grilles are available for 42CG, VB, VF, VE units; an
integral steel grille painted to match the unit or a separate
unpainted anodized aluminum grille. Optional discharge air
grilles for 42S Series units are suitable for sidewall applica-
tion, and available in clear anodized aluminum or Arctic
DRIP LIP
(Horizontal Unit)
3
/ -in.
4
1 / -in. riser sizes in
2
1 3
/ -in. or / -in. thick-
2 4
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White finish. The aluminum discharge grilles are suitable
for air dry field painting. The discharge grille frame and
blades are 6063 extruded aluminum alloy with 200-R1
satin anodized finish. The frame has a typical wall thick-
ness of 0.050-in. and is separated from the blades with
injection-molded nylon bushings. This method of assembly
minimizes corrosion and vibration. The frame mounting
holes are dimpled, allowing for a counter-sunk fastener
head appearance. All blades are airfoil in design, individu-
ally adjustable and spaced
edge of the frame is a specifically engineered channel
which retains an extruded flexible vinyl bulb gasket that
produces a positive air seal at the mounting surface, mini-
mizing smudging. An optional opposed blade damper is
screwdriver operated through the face of the unit and has
the same extruded aluminum construction and injection-
molded nylon bushings. The unit achieves an effective area
of 80% with the blades set at a 0 degree pattern, thus elim-
inating high velocity and pressure drop at the grille face.
Wider deflection with reduced throw may be achieved at
the 22 and 45 degree blade settings with slightly increased
sound levels.
Tell-tale drain pan — A secondary drain connection is
located above the primary drain to act as a "tell-tale" in the
event that the primary drain becomes obstructed. They can
be applied to either the main drain pan or an extended
main drain pan. This option is only available on the 42C
and 42DA, DC, DE, DF units.
Thermostats control packages — The standard ther-
mostat control option is line voltage except for 42SU and
42SM units. Wall-mounted line voltage and 24-v thermo-
stats are available on the 42 Series fan coil units. For ther-
mostat control packages options refer to pages 14-16.
Trim strips — Strips are available for use with partially
recessed vertical 42VA units and 42S series units only.
"TELL-TALE" DRAIN PAN
(Horizontal Unit)
3
/ -in. on center. At the outer
4
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13