Direct Gas Heating (Hastings Industries Inc.)

SBD SERIES SELECTION TABLE

Model	Air Delivery - SCFM	Outlet Velocity - FPM	Approx Shipping Weight - Lbs	MBH Input									Motor Horsepower
				Air Temperature Rise									Total Static Pressure (Refer to Notes Below)
				40	50	60	70	80	90	100	110	120	3/4"	1"	1-1/4"	1-1/2"	1-3/4"	2"	2-1/2"
SBD 233	40000	1888	5100	1878	2348	2817	3287	3757	4226	4696	5165	5635	15	15	20	20	20	25	30
	45000	2124	5100	2113	2641	3170	3698	4226	4754	5283	5811	6339	15	20	20	25	25	30	40
	50000	2360	5140	2348	2935	3522	4109	4696	5283	5870	6457	7043	20	25	25	30	30	40	40
	55000	2596	5200	2583	3228	3874	4520	5165	5811	6457	7102	7748	25	30	30	40	40	40	50
	60000	2832	5235	2817	3522	4226	4930	5635	6339	7043	7748	8452	30	40	40	40	40	50	50
	65000	3067	5330	3052	3815	4578	5341	6104	6867	7630	8393	9157	40	40	40	50	50	50	60
	70000	3303	5330	3287	4109	4930	5752	6574	7396	8217	9039	9861	40	50	50	50	60	60	CHO
	75000	3539	5380	3522	4402	5283	6163	7043	7924	8804	9685	10565	50	60	60	60	CHO	CHO	NA
SBD 240	70000	2300	6960	3287	4109	4930	5752	6574	7396	8217	9039	9812	25	25	30	40	40	40	CHO
	80000	2630	7010	3757	4696	5635	6574	7513	8452	9391	10330	11270	30	40	40	40	so	50	60
	90000	2960	7100	4226	5283	6339	7396	8452	9509	10565	11739	12678	40	40	50	50	60	60	CHO
	100000	3290	7150	4696	5870	7043	8217	9391	10565	11739	12913	14087	50	60	60	60	75	75	CHO
	110000	3620	7250	5165	6457	7748	9039	10330	11622	12913	14204	154961	60	75	75	75	100	100	CHO
	120000	3950	7325	5635	7043	8452	9861	112701	12678	14087	15496	16904	75	100	100	100	CHO	CHO	CHO

NOTES:

1. Use Total Static Pressure column that will overcome total system resistance. Approximate pressure drop for component and accessory items, burner 112", filter (dirty) 1/4", intake hood 1/8", birdscreen 1/8", discharge louver 1/8". Damper resistance may be ignored.

2. Refer to fan curves in bulletin SB-1 for blower RPM and brake horsepower.

3. NA - Not Available, CHO Contact Home Office.

4. 50 to 1 Turndown available - CHO

Selection Procedure :

1 . Choose either SBD system for 100% outside air or SBDR system for return air capability.

2. Determine required model size from selection table with desired SCFM of make-up air and MBH input or air temperature rise in °F. Please note that:

Air temp rise = (920 x MBH Input) / (1.08 x SCFM)

3. For model size selected, read required motor horsepower to overcome total static pressure resistance. Approximate static pressure losses for component and accessory items are: burner 112", filter (dirty) 1/4', intake hood 1/8', discharge louver 1/8". Damper resistance may be ignored.

Also specify type of gas and gas pressure, mounting location, blower discharge arrangement and motor electric characteristics.

Example:

Select a direct gas-fired heating system to heat 18,000 SCFM of 100% outside air with an air temperature rise of 90°F. Total static pressure required is 1.75° w.c. Unit to be rooftop mounted with down discharge through root, and furnished with throw-away filters and intake hood, Fuel is natural gas at 1 PSIG inlet pressure.

1. SBD system is chosen for 100% outside air.

2. At 18,000 SCFM and 90'F temperature rise, select model size 218. Heat input will be 1,902 MBH.

3. For size 218 with 1.75" w.c. total static pressure, selection table indicates that a 15 HP motor is required.

Selection is thus complete:

Model SBD-218-18-1902 with 15 HP motor. Unit to be natural gas fired with 1 PSIG pressure, rooftop mounted, weatherproofed, HR-2 blower arrangement, 230/60/3 power, and furnished with 2" throwaway filters and intake hood.

MODEL DESIGNATION

REMOTE CONTROL STATION

Remote control station with switches and indicating lights is standard with SBD and SBDF direct gas-fired make-up air systems. The panel shown is typical for SBD two speed size unit. Front panel and wiring will change according to items furnished.

Standard remote control station is 8 inches high, 5 inches wide and 3-1/2 inches deep with stainless panel. A flush mounted panel is available as an optional item.

GAS MANIFOLD SIZE

Based on standard 10" inlet gas pressure (Above 6900 MBH - C.H.O.)

Manifold Size NPT	Maximum MBH Input - Natural Gas
Manifold Size NPT	Spectra Modulation	Spectra W/IRI or FM
1"	1000	940
1-1/4"	1410	1255
1-1/2"	2170	1860
2"	3420	3060
2-1/2"	5200	4470
3"	6900	5840

Direct Gas Heating Systems - Page 8