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43
Cassette Air Handler
TROUBLESHOOTING PROCEDURE Continued
Frequently Asked Questions Continued
• Does the system have the proper refrig-
erant charge? A system low on refriger-
ant can cause air handlers freeze-up.
To check system charge you will need
CASSETTE PERFORMANCE DATA
NOTE: Due to EMI’s ongoing product development program, all designs and specications
are subject to change without notice.
INDOOR SOUND LEVELS (dBA)
Model High Speed Low Speed
12 41 39
24 44 42
36 51 49
DISCHARGE AIR VOLUME
“Dry Coil”
Model
High Speed
CFM
Low Speed
CFM
12 380 (180 L/S) 335 (158 L/S)
24 700 (330 L/S) 620 (293 L/S)
36 1,300 (614 L/S) 1,160 (548 L/S)
CASSETTE TECHNICAL DATA
REFRIGERATION 12 24 36
Refrigerant Type R22
CONNECTIONS 12 24 36
Suction ½” ¾”* ¾”
Liquid ¼” ⅜” ⅜”
Condensate Drain ½” I.D. ½” I.D. ½” I.D.
Branch Duct 5¼” Ø 5¼” Ø 5¼” Ø
Fresh Air Duct 1¼ x 2½” 3” x 3” 3” x 3”
FILTRATION 12 24 36
Type Washable Mesh
Quantity 1 2 3
Efciency 80%
CONDENSATE PUMP 12 24 36
Maximum Head 36” (0.9 m)**
Min. Flow Rate 2.5 GPH (9.5 l/h)
*Must bush down to 5/8” interconnect for 18K system.
** Measured from bottom of unit.
SHIPPING WEIGHT
Model Size Lbs.
12 70 (31.8 kg)
24 108 (49.1 kg)
36 146 (66.4 kg)
to contact a qualied refrigeration ser-
vice technician. Refrigerant charge in-
formation can be found in IOM for the
outdoor condensing unit.
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