BROAN KG7S Gas Furnace Owner’s Manual

BROAN KG7S Gas Furnace

Product Information

Technical Specifications

• Product: KG7S (A and K Series)
• Type: High Efficiency Upflow/Horizontal and Downflow Gas Furnaces

Induced Draft – 80+ AFUE Input 45,000 – 126,000 Btuh

• The high-efficiency gas furnace may be installed free-standing in a utility room, basement, or enclosed in an alcove or closet.
• The rounded corner jacket provides a pleasing appliance appearance.
• Design certified by CSA for application in the United States and Canada.

Warranty
The product comes with a warranty. Please refer to the warranty information provided for more details.

Features and Benefits

• Main Air Limit Switch
• Inducer Assembly
• Transformer Igniter
• Blower Door Switch
• Roll-Out Switch
• Blower Assembly
• Control Board
• Gas Valve
• Pressure Switch
• Flame Sensor
• Gas Manifold
• Burner Assembly
• Combustion Tube

Gas Furnace Components

Upflow/Horizontal Gas Furnace

• Blower Assembly (behind blower panel)
• Blower Door Switch (behind blower panel)
• Combustion Tube
• Control Board
• Transformer
• Pressure Switch
• Inducer Assembly
• Main Air Limit Switch
• Gas Valve
• Gas Manifold
• Igniter
• Burner Assembly
• Roll-Out Switch
• Flame Sensor

Downflow Gas Furnace

• Front Brace
• Bottom Panel
• Bottom View
• Top View
• Hole for Gas
• Electric Dimensions
• Accepts 4 Type B Vent Pipe Flanges
• Thermostat Electric

BLOWER PERFORMANCE – KG7SA

Airflow Data
Model Number & Heating Input (Btuh)

Model Number & Heating Input (Btuh)	External Static Pressure (Inches Water Column)	CFM Rise
SA045C-23A BottomReturn (45,000)	0.1	1,260
SA045C-23A SideReturn (45,000)	0.2	1,205

FAQ

• Q: Where can the high-efficiency gas furnace be installed?
  A: The high-efficiency gas furnace can be installed free-standing in a utility room, or basement, or enclosed in an alcove or closet.
• Q: Is the gas furnace certified for use in the United States and Canada?
  A: Yes, the gas furnace is designed and certified by CSA for application in the United States and Canada.
• Q: What is the warranty period for the product?
  A: Please refer to the warranty information provided for details on the warranty period.

High Efficiency Upflow/Horizontal and Downflow Gas Furnaces

• Induced Draft – 80+ AFUE
• Input 45,000 – 126,000 Btuh

The high-efficiency gas furnace may be installed free-standing in a utility room, basement, or enclosed in an alcove or closet. The rounded corner jacket provides a pleasing “appliance appearance.” Design certified by CSA for application in the United States and Canada.

WARRANTY

• 10-year all-parts warranty.
• 1 Year Quality Pledge to replace the unit if the heat exchanger fails within the first year of operation, to the original owner.
• Consumer product registration required for 10 year All Parts Warranty and Quality Pledge within a limited period of time after the installation. See current warranty document or visit our consumer web site listed on the back of this document for warranty details.
• When registered, this product is upgraded to a limited lifetime heat exchanger warranty.

FEATURES AND BENEFITS

• 100% fired and tested: All units and each component are tested on the manufacturing line.
• Best packaging in the industry: Unique corner post design assures the product will arrive at the homeowner dent-free.
• Low Boy Height: Easy to apply in low ceiling applications, works well with taller high SEER coils, easier to handle and install.
• Tubular primary heat exchanger: Heavy gauge aluminized steel heat exchanger assures a long life.
• 30-second blower delay at start-up: Assures a warm duct temperature at furnace start-up. Adjustable blower-off settings (60, 90, 120 and 180 seconds).
• 30-second post purge: Increases the life of the heat exchanger.
• Hot surface ignitor: Innovative application of an appliance-type ignitor with a 20-year history of reliability. Utilizes proven Smartlite® technology.
• Color-coded wire harness: Designed to fit the components, all with quick-connect fittings for ease of service and replacement.
• High static blowers: All models are equipped with high static blowers.
• 90-second cooling cycle blower-off delay (TDR): increases cooling performance when matched with a NORDYNE coil.
• Flexible category I venting system: May be vented with the dedicated venting system or commonly vented with other category one appliances.
• High-efficiency blower kits: Maximize efficiencies. On select units, a SEER improvement of up to 1 point is realized.
• Multi-speed direct drive blower: Designed to give a wide range of cooling capacities. Switches on PCB, provide ultra-easy motor speed selection.
• LP convertible: Simple burner orifice and regulator spring change for ease of convertibility.
• Diagnostic lights for easy troubleshooting without counting flashes: Dedicated light for flame signal strength and 2 lights in combination to indicate all other fault codes with easy-to-recognize states without counting flashes.
• Integrated control board: Incorporates connections for electronic air cleaner and humidifier.
• Two-piece door design: Enhances furnace appearance and uses captured screws to prevent losing door screws.

GAS FURNACE COMPONENTS

DIMENSIONS

*SA Model #’s	Dimension “A”	Dimension “B”	Dimension “C”	Dimension “D”
045-23A	14 1/4	10 3/4	12 5/8	12 7/8
054-23A
072-24B	17 1/2	11 3/4	15 7/8	16 1/8
090-24B
072-35C	21	14	19 3/8	19 7/8
090-35C
108-35C
126-45D	24 1/2	15 1/4	22 7/8	23 1/8

*SK Model #’s	Dimension “A”	Dimension “B”	Dimension “C”	Dimension “D”
054-23A	14 1/4	10 3/4	12 5/8	12 7/8
072-24B	17 1/2	11 3/4	15 7/8	16 1/8
090-24B
108-35C	21	14	19 3/8	19 5/8
126-45D	24 1/2	15 1/4	22 7/8	23 1/8

BLOWER PERFORMANCE

KG7SA

AIRFLOW DATA

*SA – UPFLOW / HORIZONTAL FURNACES – 80+ AFUE
Model Number & Heating Input (Btuh)	Motor Speed	External Static Pressure (Inches Water Column)
		0.1		0.2		0.3		0.4		0.5		0.6		0.7		0.8
		CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise
	High*	1,260	26	1,205	28	1,145	29	1,080	31	1,025	33	960	35	890	37	825	40
SA045C-23A Bottom Return (45,000)	Med-High Med-Low**	955 825	35 40	950 800	35 42	940 760	35 44	935 730	36 46	925 690	36 48	860 650	39 51	800 600	42	725 530	46
															56		63
	Low	655	51	630	53	610	55	580	57	550	61	520	64	480	69	435	77
	High*	1,350	25	1,290	26	1,225	27	1,155	29	1,100	30	1,025	33	950	35	885	38
SA045C-23A Side Return (45,000)	Med-High Med-Low**	1,025 885	33 38	1,015 855	33 39	1,005 815	33 41	1,000 780	33 43	990 740	34 45	920 695	36 48	855 640	39 52	775 565	43
																	59
	Low	700	48	675	49	655	51	620	54	590	56	555	60	515	65	465	72
	High*	1,260	32	1,205	33	1,145	35	1,080	37	1,025	39	960	42	890	45	825	48
SA054C-23A Bottom Return (54,000)	Med-High** Med-Low	955 825	42 48	950 800	42 50	940 760	43 53	935 730	43 55	925 690	43	860 650	47	800 600	50	725 530	55
											58		62		67		75
	Low	655	61	630	63	610	66	580	69	550	73	520	77	480	83	435	92
	High*	1,350	30	1,290	31	1,225	33	1,155	35	1,100	36	1,025	39	950	42	885	45
SA054C-23A Side Return (54,000)	Med-High** Med-Low	1,025 885	39 45	1,015 855	39 47	1,005 815	40 49	1,000 780	40 51	990 740	40 54	920 695	43	855 640	47	775 565	52
													58		63		71
	Low	700	57	675	59	655	61	620	65	590	68	555	72	515	78	465	86
	High*	1,685	32	1,640	33	1,605	33	1,565	34	1,515	35	1,475	36	1,415	38	1,345	40
SA072C)-24B Bottom Return (72,000)	Med-High Med-Low**	1,330 1,175	40 45	1,295 1,155	41 46	1,275 1,125	42 47	1,245 1,100	43 48	1,215 1,075	44 50	1,185 1,045	45 51	1,135 1,010	47 53	1,070 955	50 56
	Low	930	57	895	60	885	60	850	63	825	65	800	67	770	69	740	72
	High*	1,770	30	1,720	31	1,685	32	1,645	32	1,590	34	1,550	34	1,485	36	1,415	38
SA072C-24B Side Return (72,000)	Med-High Med-Low**	1,400 1,235	38 43	1,360 1,215	39 44	1,340 1,180	40 45	1,310 1,155	41 46	1,275 1,130	42 47	1,245 1,100	43 48	1,190 1,060	45 50	1,125 1,005	47 53
	Low	975	55	940	57	930	57	890	60	865	62	840	63	810	66	775	69
	High*	1,610	41	1,575	42	1,530	44	1,485	45	1,440	46	1,385	48	1,340	50	1,275	52
SA090C-24B Bottom Return (90,000)	Med-High** Med-Low	1,295 1,155	51 58	1,260 1,130	53 59	1,235 1,100	54 61	1,220 1,070	55	1,175 1,035	57	1,135 1,015	59	1,095 965	61 69	1,015 920	66 72
									62		64		66
	Low	880	76	860	78	830	80	800	83	765	87	740	90	675	99	660	101
	High*	1,690	39	1,655	40	1,610	41	1,560	43	1,510	44	1,455	46	1,405	47	1,340	50
SA090C-24B Side Return (90,000)	Med-High** Med-Low	1,360 1,215	49 55	1,325 1,190	50 56	1,300 1,155	51 58	1,280 1,125	52 59	1,235 1,090	54	1,190 1,065	56	1,150 1,015	58	1,065 965	63 69
											61		63		66
	Low	925	72	900	74	870	77	840	79	800	83	775	86	710	94	695	96
	High*	1,950	27	1,865	29	1,790	30	1,715	31	1,630	33	1,550	34	1,475	36	1,390	38
SA072C-35C Bottom Return (72,000)	Med-High Med-Low**	1,860 1,300	29	1,780 1,240	30	1,710 1,200	31	1,635 1,160	33	1,575 1,120	34	1,500 1,065	36 50	1,415 995	38 54	1,325 910	40 59
			41		43		44		46		48
	Low	1,165	46	1,115	48	1,060	50	1,025	52	985	54	940	57	890	60	825	65
	High*	2,030	26	1,940	27	1,860	29	1,785	30	1,695	31	1,615	33	1,535	35	1,445	37
SA072C-35C Side Return (72,000)	Med-High Med-Low**	1,935 1,350	28	1,850 1,290	29	1,780 1,250	30	1,700 1,205	31	1,340 1,165	40 46	1,560 1,110	34	1,470 1,035	36 52	1,380 945	39 56
			40		41		43		44				48
	Low	1,215	44	1,160	46	1,105	48	1,065	50	1,025	52	980	54	925	58	860	62
SA072C-35C Side + Bottom	High* Med-High	2,050 1,955	26 27	1,960 1,870	27 29	1,880 1,800	28 30	1,800 1,715	30 31	1,710 1,655	31 32	1,630 1,575	33 34	1,550 1,485	34	1,460 1,390	37 38
															36
or 2 Sides (72,000)	Med-Low** Low	1,365 1,225	39 44	1,300 1,170	41 46	1,260 1,115	42 48	1,220 1,075	44 50	1,175 1,035	45 52	1,120 985	48 54	1,045 935	51 57	955 865	56 62

Table 3. Maximum Airflow & Temperature Rises (° F) – Upflow / Horizontal Furnaces

*SA – UPFLOW / HORIZONTAL FURNACES – 80+ AFUE
Model Number	Heating Input (Btuh)	Motor Speed	External Static Pressure (Inches Water Column)
			0.1		0.2		0.3		0.4		0.5		0.6		0.7		0.8
			CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise
SA090C-35C Bottom Return (90,000)		High* Med-High** Med-Low Low	1,940 1,820 1,290 1,145	34	1,860 1,760 1,245 1,110	36 38 54 60	1,790 1,695 1,200 1,070	37 39 56 62	1,710 1,620 1,155 1,035	39 41 58 64	1,625 1,545 1,110 1,000	41 43 60	1,540 1,466 1,060 950	43 45 63	1,450 1,380 995 905	46 48	1,355 1,280 915 835	49 52
				37 52 58
																67 74		73 80
												67		70
SA090C-35C Side Return (90,000)		High* Med-High** Med-Low Low	2,020 1,895 1,345 1,190	33	1,935 1,830 1,295 1,155	34	1,860 1,765 1,250 1,115	36 38 53 60	1,780 1,685 1,200 1,075	37 40 56 62	1,690 1,610 1,155 1,040	39 41 58 64	1,600 1,525 1,100 980	42 44 61	1,510 1,435 1,035 940	44 46 64	1,410 1,330 950 870	47 50
				35 50 56		36 51 58
																		70 77
														68		71
SA090C-35C Side + Bottom or 2 Sides (90,000)		High* Med-High** Med-Low Low	2,040 1,910 1,355 1,205	33	1,955 1,850 1,310 1,165	34	1,880 1,780 1,260 1,125	35 37 53 59	1,795 1,700 1,215 1,085	37 39 55 61	1,705 1,625 1,165 1,050	39 41 57 63	1,620 1,540 1,115 1,000	41 43 60	1,525 1,450 1,050 950	44 46 63	1,425 1,345 960 875	47 50
				35 49 55		36 51 57
																		69 76
														67		70
SA108C-35C Bottom Return (108,000)		High* Med-High** Med-Low Low	2,205 2,050 1,700 1,390	36 39 47 58	2,150 1,995 1,680 1,370	37 40 48 58	2,095 1,955 1,645 1,355	38 41 49 59	2,030 1,895 1,610 1,320	39 42 50 61	1,970 1,840 1,565 1,300	41 43 51 62	1,900 1,775 1,525 1,270	42 45 52 63	1,830 1,700 1,460 1,225	44 47 55 65	1,740 1,610 1,375 1,175	46 50 58
																		68
SA108C-35C Side Return (108,000)		High* Med-High** Med-Low Low	2,295 2,130 1,770 1,445	35 38 45 55	2,235 2,075 1,750 1,425	36 39 46 56	2,180 2,035 1,710 1,410	37 39 47 57	2,110 1,970 1,675 1,375	38 41 48 58	2,050 1,915 1,630 1,350	39 42 49 59	1,975 1,845 1,585 1,320	41 43 50 61	1,900 1,765 1,520 1,275	42 45 53 63	1,810 1,675 1,430 1,225	44 48 56 65
SA108C-35C Side + Bottom or 2 Sides (108,000)		High* Med-High** Med-Low Low	2,315 2,155 1,785 1,460	35 37 45 55	2,260 2,095 1,765 1,440	35 38 45 56	2,200 2,055 1,725 1,425	36 39 46 56	2,130 1,990 1,690 1,385	38 40 47 58	2,070 1,930 1,645 1,365	39 41 49 59	1,995 1,865 1,600 1,335	40 43 50 60	1,925 1,785 1,535 1,285	42 45 52 62	1,825 1,690 1,445 1,235	44 47 55 65
SA126C-45D Bottom only or 2 openings (126,000)		High* Med-High** Med-Low Low	2,255 2,075 1,720 1,360	41 45 54 69	2,200 2,025 1,695 1,375	42 46 55 68	2,125 1,970 1,655 1,365	44 47 56 68	2,065 1,940 1,630 1,315	45 48 57	2,010 1,875 1,580 1,310	46 50 59	1,935 1,810 1,520 1,300	48 52 61	1,855 1,750 1,455 1,260	50 53 64	1,755 1,680 1,390 1,230	53 56 67
										71		71		72		74		76
SA126C-45D Side Return (126,000)		High* Med-High** Med-Low Low	2,230 2,055 1,705 1,345	42 45 55 69	2,180 2,005 1,680 1,360	43 47 56 69	2,105 1,950 1,640 1,350	44 48 57 69	2,045 1,920 1,615 1,300	46 49 58	1,990 1,855 1,565 1,230	47 50 60	1,915 1,790 1,505 1,290	49 52 62	1,835 1,735 1,440 1,250	51 54 65	1,740 1,665 1,375 1,220	54 56 68
										72		76		72		75		77

NOTES:

• Factory Set Cooling Speed
• Factory Set Heating Speed

1. Two openings are recommended for airflows above 1,600 CFM if filter(s) is(are) adjacent to the furnace
2. Temperature rises in the table are approximate. Actual temperature rises may vary.
3. Temperature rises shaded in gray are for reference only. These conditions are not recommended.

KG7SK

*SK – DOWNFLOW FURNACES – 80+ AFUE
Model Number & Heating Input (Btuh)	Motor Speed	External Static Pressure (Inches Water Column)
		0.1		0.2		0.3		0.4		0.5		0.6		0.7		0.8
		CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise	CFM	Rise
SK054C-23A (54,000)	High* Med-High Med-Low** Low	1,375 1,155 790 650	29 35 51	1,340 1,130 775 640	30 35 52	1,300 1,110 765 630	31 36 52	1,270 1,085 750 610	31 37 53	1,225 1,055 730 590	33 38 55	1,175 1,015 700 565	34 39	1,115 975 665 530	36 41	1,035 910 610 480	39 44
													57 71		60 75		66 83
			62		63		63		66		68
SK072C-24B (72,000)	High* Med-High Med-Low** Low	1,675 1,330 1,180 940	32 40 45 57	1655 1315 1165 925	32 41 46 58	1640 1300 1150 900	33 41 46 59	1620 1280 1135 880	33 42 47 61	1590 1255 1115 850	34 42 48 63	1560 1230 1090 825	35 44 50 65	1520 1200 1060 795	35 44 50	1475 1150 1010 760	36 46 53
															67		70
SK090C-24B (90,000)	High* Med-High Med-Low** Low	1,610 1,295 1,155 910	41 51 58	1590 1275 1235 885	42 52 54	1575 1260 1115 860	42 53 60	1560 1250 1095 835	43 53 61	1540 1220 1065 810	43 55 63	1495 1195 1040 785	46 57 66	1460 1170 1015 765	46 57 66	1415 1120 980 735	47 60 68
			73		75		78		80		82		85		87		91
SK108C-35C (108,000)	High* Med-High Med-Low** Low	2,395 2,190 1,785 1,145	33 37 45	2,335 2,135 1,770 1,110	34 37 45	2,285 2,115 1,740 1,070	35 38 46	2,230 2,080 1,725 1,035	36 38 46	2,200 2,030 1,685 1,000	36 39 47	2,140 1,975 1,645 950	37 41 49	2,080 1,915 1,615 905	38 42 50	2,000 1,810 1,565 835	40 44 51
			70		72		75		77		80		84		88		96
SK126C-45D (126,000)	High* Med-High Med-Low** Low	2,445 2,195 1,795 1,480	38 43 52 63	2,395 2,170 1,780 1,475	39 43 52 63	2,385 2,140 1,770 1,450	39 44 53 64	2,330 2,120 1,760 1,440	40 44 53 65	2,275 2,090 1,725 1,440	41 45 54 65	2,225 2,030 1,690 1,415	42 46 55	2,130 1,975 1,655 1,405	44 47 56	2,015 1,855 1,610 1,375	46 50 58
													66		66		68

NOTES:

• Factory Set Cooling Speed
• Factory Set Heating Speed

1. Temperature rises in the table are approximate. Actual temperature rises may vary.
2. Temperature rises shaded gray are for reference only. These conditions are not recommended.

Table 4. Maximum Airflow & Temperature Rises (° F) – Downflow Furnaces

MODEL IDENTIFICATION CODE

SPECIFICATIONS

KG7SA MODEL NUMBERS	-045-23A	-054-23A	-072-24B	-090-24B	-072-35C	-090-35C	-108-35C	-126-45D
Input – Btuh (a)	45,000	54,000	72,000	90,000	72,000	90,000	108,000	126,000
Heating Capacity – Btuh	36,000	43,200	57,600	72,000	57,600	72,000	86,400	100,800
AFUE	80.0	80.0	80.0	80.0	80.0	80.0	80.0	80.0
Blower D x W	10 x 6	10 x 6	11 x 8	11 x 8	10 x 10	10 x 10	11 x 10	11 x 10
Motor H.P. – Speed – Type	1/3 – 4 – PSC	1/3 – 4 – PSC	1/2 – 4 – PSC	1/2 – 4 – PSC	1/2 – 4 – PSC	1/2 – 4 – PSC	1.0 – 4 – PSC	1.0 – 4 – PSC
Motor FLA	4.80	4.80	8.20	8.20	7.50	7.50	13.75	13.75
Rated Ext. SP – In. W.C.	0.5	0.5	0.5	0.5	0.5	0.5	0.5	0.5
Temperature Rise Range – ºF	30-60	30-60	35-65	35-65	35-65	35-65	40-70	40-70
Shipping Weights	100lbs	100lbs	110lbs	115lbs	115lbs	120lbs	125lbs	145lbs

KG7SK MODEL NUMBERS	-054-23A	-072-24B	-090-24B	-108-35C	-126-45D
Input – Btuh (a)	54,000	72,000	90,000	108,000	126,000
Heating Capacity – Btuh	43,200	57,600	72,000	86,400	100,800
AFUE	80.0	80.0	80.0	80.0	80.0
Blower D x W	10 x 6	11 x 8	11 x 8	11 x 10	11 x 10
Motor H.P. – Speed – Type	1/3 – 4 – PSC	1/2 – 4 – PSC	1/2 – 4 – PSC	1.0 – 4 – PSC	1.0 – 4 -PSC
Motor FLA	4.80	8.20	8.20	13.75	13.75
Rated Ext. SP – In. W.C.	0.5	0.5	0.5	0.5	0.5
Temperature Rise Range – ºF	30-60	35-65	35-65	40-70	40-70
Shipping Weights	100lbs	110lbs	115lbs	125lbs	145lbs

ACCESSORIES

KG7S (A, K) KITS
Description	SKU
“A” Cabinet fixed speed, high efficiency, FSHE	904872
“B” Cabinet fixed speed, high efficiency, FSHE	904873
“C” Cabinet fixed speed, high efficiency, FSHE	904874
“D” Cabinet fixed speed, high efficiency, FSHE	904875
“A” Cabinet variable speed, high efficiency, VSHE	904876
“B” Cabinet variable speed, high efficiency, VSHE	904877
“C” Cabinet variable speed, high efficiency, VSHE	904878
“D” Cabinet variable speed, high efficiency, VSHE	904879
“A” Cabinet downflow sub base kit	902974
“B”, “C”, “D” Cabinet downflow sub base kit	904911
U.S. LP Conversion kit (0 to 10,000 ft.)	905028
Canada LP Conversion kit (0 to 4,500 ft.)	905029
Bottom return filter 20 per box, “A” cabinet	903088A
Bottom return filter 20 per box, “B” cabinet	904916
Bottom return filter 20 per box, “C” cabinet	904917
Bottom return filter 20 per box, “D” cabinet	904918
Side return filter kit	541036

GENERAL TERMS OF LIMITED WARRANTY

• NORDYNE will furnish a replacement for any part of this product that fails in normal use and service within the first ten years of installation, per the terms of the warranty.
• For complete details of the Limited Warranty, including applicable terms and conditions, see your local installer or contact the NORDYNE warranty department for a copy.

8000 Phoenix Parkway | O’Fallon, MO 63368-3827

Specifications and illustrations are subject to change without notice and without incurring obligations. Printed in U.S.A (07/2013) 739C-0713 (Replaces 739C-1112)

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