Nordyne M1G, Service Manual

Page: 6 / 36

6
a. Federal Manufactured Home Constructions & Safety
Standard (H.U.D. Title 24, Part 3280.707[a][2])
b. American National Standard (ANSI-119.2/NFPA-501C)
for all recreational vehicle installations.
c. American National Standard (ANSI-Z223.1/NFPA-54)
and/or CAN/CGA B149 for all gas-fired furnace models.
d. American National Standard (ANSI-Z95.1/NFPA-31) and/
or CSA B139 for all oil-fired furnace models.
e. American National Standard (ANSI-C1/NFPA-70) and/or
CSA 22.1 Canadian Electric Code Part 1 for all electrical
field wiring.
f. Units have been investigated under standards UL 307A
& B, ANZI 21.47a — CAN/2.3a - 1995, and CSA B140.10.
2. CIRCULATING AIR SUPPLY
RETURN AIR PROVISIONS
U.S.A. home manufacturers shall comply with all of the
following conditions to have acceptable return air systems for
closet installed forced air heating appliances:
a. Regardless of the location, the return air opening into the
closet shall not be less than specified in the appliance’s
listing.
b. Means shall be provided to prevent inadvertent closure
by a flat object placed over the return air opening when it
is located in the floor of the closet (versus the vertical front
or side wall).
c. The cross-sectional area of the return duct system lead-
ing into the closet, when located in the floor or ceiling shall
not be less than 235 square inches (or 390 square inches
for 5 ton ready M1 Furnaces).
d. The total free area of openings in the floor or ceiling
registers serving the return air duct system must be at
least 352 sq. in. At least one register should be located
where it is not likely to be covered by carpeting, boxes and
other objects.
e. Materials located in the return duct system must have a
flame spread classification of 200 or less. This includes a
closet door if the furnace is in a closet.
f. Noncombustible pans having 1" upturned flanges are
located beneath openings in a floor duct system.
Table 2. Blower Performance Data
ESP
(In. W.C.)
Low Med-Lo Med-Hi High Low Med-Lo Med-Hi High
1/8 HP 1 024 0.1 820 730
9 X 7.5 0.2 790 680
0.3 720 610
056 - H, A 0.4 650 550
UNITS 0.5 560 450
0.6 430 330
1/5 HP 1 030 0.1 950 850
9 X 7.5 0.2 910 810
066-A 0.3 850 730
070 - H,A 0.4 780 670
UNITS 0.5 680 580
0.6 570 480
1/4 HP 1 036 0.1 1210 1140
10 x 8 0.2 1190 1110
077 - H, B 0.3 1140 1050
090 - H, B 0.4 1090 990
086-B 0.5 1030 930
UNITS 0.6 970 870
1/3 HP 2 036 0.1 1020 1350 960 1210
10 x 8 0.2 1000 1330 940 1170
056 - B 0.3 970 1260 890 1110
070 - B 0.4 940 1210 850 1050
UNITS 0.5 890 1130 790 980
0.6 840 1060 730 900
1/2 HP 4 047 0.1 890 1070 1270 1480 880 1050 1220 1340
11 X 8 0.2 880 1060 1260 1460 870 1040 1210 1330
0.3 860 1020 1220 1400 850 1000 1160 1270
C UNITS 0.4 840 1000 1180 1350 820 980 1110 1210
0.5 810 960 1120 1280 800 940 1070 1160
0.6 760 920 1080 1220 750 890 1010 1090
3/4 HP 4 054
10 x 8 0.2 900 1110 1450 1850 870 1070 1420 1700
4 POLE 0.3 860 1080 1410 1810 840 1050 1380 1650
0.4 830 1040 1370 1760 820 1030 1350 1630
D UNITS 0.5 790 1020 1340 1730 780 1010 1320 1590
0.6 770 990 1320 1700 760 980 1290 1550
HP, Wheel,
Poles, Units
Coil
Size
WITHOUT COIL WITH COIL
Speed