International comfort products R8MXL Series Installation Instructions Manual page 3

used with a night setback thermostat. Return−air temperature
must not exceed 80_F (27_C) db. Failure to follow these
return−air temperature limits may affect reliability of heat
exchangers, motors, and controls. (See Fig. 3).
5 15/16 5 15/16
[150.7] [150.7]
AIR FLOW AIR FLOW
5 1/2 5 1/2
[140.3] [140.3]
Ø7/8 Ø7/8
8 7/16 8 7/16
[22.2] [22.2]
[213.5] [213.5]
ACCESSORY ACCESSORY
9 7/8 9 7/8
[250.7] [250.7]
Ø1/2 Ø1/2
[12.7] [12.7]
27 3/4 27 3/4
THERMOSTAT WIRE ENTRY THERMOSTAT WIRE ENTRY
[704.7] [704.7]
33 1/4 33 1/4
[843.9] [843.9]
Ø7/8 Ø7/8
[22.2] [22.2]
ACCESSORY ACCESSORY
21.6 21.6
[549.5] [549.5]
BOTTOM INLET BOTTOM INLET
28.39 28.39
[721.2] [721.2]
29 29
[736.9] [736.9]
NOTES:
1. Two additional 7/8-in. (22 mm) diameter holes are located in the top plate.
2. Minimum return-air openings at furnace, based on metal duct. If flex duct is used, see flex duct manufacturer's recommendations for equivalent diameters.
a. For 800 CFM-16-in. (406 mm) round or 14 1/2 x 12-in. (368 x 305 mm) rectangle.
b. For 1200 CFM-20-in. (508 mm) round or 14 1/2 x 19 1/2-in. (368 x 495 mm) rectangle.
c. For 1600 CFM-22-in. (559 mm) round or 14 1/2 x 22 1/16-in. (368 x 560mm) rectangle.
d. For airflow requirements above 1800 CFM, see Air Delivery table in Specification Sheet literature for specific use of single side inlets. The use of both side
inlets, a combination of 1 side and the bottom, or the bottom only will ensure adequate return air openings for airflow requirements above 1800 CFM.
A
CABINET
WIDTH
FURNACE SIZE IN. (MM)
0451412 14−3/16 (360)
0701712 17−1/2 (445)
0701716 17−1/2 (445)
0901714 17−1/2 (445)
0902116 21 (533)
0902120 21 (533)
1102120 21 (533)
1352420 24−1/2 (622)
*135 size furnace requires a 5 or 6-in. (127 or 152 mm) vent. Use a vent adapter between furnace and vent stack. See Installation Instructions for complete
installation requirements.
441 01 6100 02
5.1 5.1
[130.5] [130.5]
2 1/16 2 1/16
[51.6] [51.6]
1.7 1.7
[43.5] [43.5]
C
Ø7/8 Ø7/8
[22.2] [22.2]
ACCESSORY (2) ACCESSORY (2)
1 15/16 1 15/16
[49.2] [49.2]
AIR FLOW AIR FLOW
2 5/16 2 5/16
3 7/16 3 7/16
[59] [59]
[86.8] [86.8]
5 7/8 5 7/8
[148.5] [148.5]
TOP OF CASING TOP OF CASING
Ø7/8 Ø7/8
[22.2] [22.2]
JUNCTION BOX JUNCTION BOX
LOCATION LOCATION
Ø1 3/4 Ø1 3/4
[44.5] [44.5]
GAS ENTRY GAS ENTRY
6.1 6.1
[155.7] [155.7]
BOTTOM RETURN BOTTOM RETURN
WIDTH WIDTH
Fig. 1 − Dimensional Drawing
Table 1 – Dimensions
B
TOP AND BOTTOM
OUTLET WIDTH FLUE COLLAR
IN. (MM)
12−9/16 (319)
15−7/8 (403)
15−7/8 (403)
15−7/8 (403)
19−3/8 (492)
19−3/8 (492)
19−3/8 (492)
22−7/8 (581)
Specifications are subject to change without notice.
For accessory installation details, refer to the applicable
instruction literature.
NOTE: Remove all shipping brackets and materials before
operating the furnace.
5 7/8 5 7/8
[148.5] [148.5]
5 7/16 5 7/16
A A
[138.5] [138.5]
B
TOP OF CASING TOP OF CASING
4 13/16 4 13/16
[122.2] [122.2]
9 9/16 9 9/16
[243.3] [243.3]
27 3/4 27 3/4
[704.7] [704.7]
J.BOX PROVISION J.BOX PROVISION
29 9/16 29 9/16
[750.7] [750.7]
ACCESSORY ACCESSORY
KNOCK OUTS FOR KNOCK OUTS FOR
D 3/4 3/4
VENTING(5 VENTING(5
[19.1] [19.1]
PLACES) PLACES)
C D
BOTTOM WIDTH
IN. (MM) IN. (MM)
9−5/16 (237) 12−11/16 (322)
11−9/16 (294) 16 (406)
11−9/16 (294) 16 (406)
11−9/16 (294) 16 (406)
13−5/16 (338) 19−1/2 (495)
13−5/16 (338) 19−1/2 (495)
13−5/16 (338) 19−1/2 (495)
15−1/16 (383) 23 (584)
8 5/8 8 5/8
[219] [219]
6 13/16 6 13/16
[172.3] [172.3]
5 5/8 5 5/8
AIR FLOW AIR FLOW
[143.3] [143.3]
19 19
1 15/16 1 15/16
[481.7] [481.7]
[49.2] [49.2]
OUTLET OUTLET
Ø1/2 Ø1/2
[12.7] [12.7]
THERMOSTAT WIRE ENTRY THERMOSTAT WIRE ENTRY
Ø1 3/4 Ø1 3/4
[44.5] [44.5]
GAS ENTRY GAS ENTRY
Ø7/8 Ø7/8
[22.2] [22.2]
Ø7/8 Ø7/8
[22.2] [22.2]
Ø7/8 Ø7/8
[22.2] [22.2]
ACCESSORY ACCESSORY
22 1/16 22 1/16
[560] [560]
SIDE INLET SIDE INLET
(BOTH SIDES) (BOTH SIDES)
VENT VENT
CONNECTION
SIZE*
IN. (MM)
4 (102)
4 (102)
4 (102)
4 (102)
4 (102)
4 (102)
4 (102)
4 (102)*
7 13/16 7 13/16
9 11/16 9 11/16
[197.8] [197.8]
[245.4] [245.4]
11 7/16 11 7/16
[290.7] [290.7]
14 7/8 14 7/8
[337.3] [337.3]
(BOTH SIDES) (BOTH SIDES)
1 1/4 1 1/4
[31.8] [31.8]
1
[25.4] [25.4]
A10290
SHIP WT
(LB / KG)
104 (47)
126 (57)
126 (57)
127 (58)
140 (64)
140 (64)
152 (69)
163 (74)
3