Carrier 40FS - Manual (Page 7)

all 38HQ and 40FQ models, 40FS916320 (11 to
20 kw) with 40FS200 fan section, and all 40FS916500
models, maintaina 1-in.clearance betweendischarge
plenum and ductwork to combustible materials for
a distance of 36-in. from unit. (0-in. clearance to
heater cabinet still permissible.) Use a heater spacer
plate. Carrier Model No. 40FS900310 to maintain
1-in. clearance.
SCREWS (4) SUPPLIED
SCREW CLEARANCE ]
HOLES(8)
FILTER SECTION
(SUPPORT RACK)'
FILTER SECTION
FLANGE MAY BE
POSITIONED INSIDE
(AS SHOWN) OR OUT­
SIDE UNIT CASING
FDR DUCT CONN.
SPEED NUTS (4)
SUPPLIED
BOrrOM F..ANGE
ATTACHING FILTER SECTION TO FAN SECTION OR COOLING COIL IN ALL
INSTALLATIONS EXCEPT DOWNFLOW COOLING OR DOWNFLOW COOLING
AND HEATING,____________________________________
Fig. 6 — Attaching Filter Section
SUPPLY AIR DUCT
'CONNECTION (FLANGES)
SHEET METAL
SCREWS (2 EACH
SIDE, I ON BACK)
SUPPLIED
'2s V
.ELECTRIC
HEATER
FAN
SECTION
SHEET METAL
SCREWS (2 EACH
SIDE, I ON BACK)
SUPPLIED
O’ AIRFLOW
Fig. 7 —
COIL
SECTION
FILTER
— ^SECTION
RETURN AIR DUCT
CONN. TO FILTER
SECTION
Upflow Heating and Cooling
Unit Assembly
To maintain ductwork clearance on upflow in­
stallations when heater top is within 3 in. of com­
bustible material, set heater spacer plate over heater
discharge air opening. Attach ductwork to heater
flanges. Fig. 9. To maintain ductwork clearance
on downflow installations thru a floor: cut a 16-in. x
12-in. hole thru the floor. Set the spacer plate into
the hole. Place unit into the installed spacer plate
and connect discharge plenum to flanges provided
on heater.
Step 4 — Connect Ductwork to Unit Supply
and Return Air Openings — Duct connection
flanges are provided on fan section when used with
accessory flange deck, cooling coil, electric heater
and filter section, Fig. 1 thru 8. Two instances may
occur when duct connection flanges are not avail­
able for use; when cooling unit or cooling and heat­
ing unit is assembled for downflow cooling or
downflow cooling and heating with filter section
in place (Fig. 8), when filter section is installed
on fan section or cooling coil with its duct connec­
tion flanges in alternate position inside of coil or
fan casing. Field-fabricated duct connections
are then required.
CAU'HON: Do not screw ductwork directly to
filter section. Screws will present removal of
If necessary, refer to Carrier System Design
Manual, Part 2, for system air duct design. It is
recommended that flexible connectors be used
between ductwork and unit to prevent trans­
mission of vibration. (See Ductwork Acoustical
SHEET METAL SCREW*
LOCATIONS (2
EACH SIDE) ON
FLANGES FOR
ATTACHING FILTER
SECTION (SEE
FIGS)
FIELD FABRICATED
RETURN AIR DUCT CONN.TO
FILTER SECTION
FILTER
SECTION
SHEET METAL
SCREWS (2 EACH
SIDE, ION BACK)
SUPPLIED
SHEET METAL
SCREWS (2 EACH
SIDE, ION BACK)
SUPPLIED
CT AIRFLOW ■ - ---------------------- ! SUPPLY AIR DUCT
^ ------ J'»CONN. TO HEATER
FLANGES
*DRILL THRU FILTER SECTION FLANGES AND CCWLING COIL FLANGES TO ATTACH
FILTER SECTION. DO NOT SCREW DUCTWORK TO FILTER SECTION.
Fig. 8 — Downflow Heating and Cooling
Unit Assembly