Chromalox ADHT-005, ADH-010, ADHT-010, ADH-015, ADHT-015 Installation Operation and RENEWAL PARTS IDENTIFICATION

...

0 (0)

Chromalox®

			Installation Operation														SERVICE REFERENCE
																	SERVICE REFERENCE

															DIVISION 4									SECTION ADH
						and										SALES			(Supersedes PF438-2)							PF438-3
						and									REFERENCE				(Supersedes PF438-2)							PF438-3
		RENEWAL PARTS IDENTIFICATION																							161-057949-001
		RENEWAL PARTS IDENTIFICATION													DATE			MARCH, 1999

						Type ADH and ADHT
							Air Duct Heaters
Specifications — Table A

												No. Mtg.
		Approx.		Approx.									Holes										Dimensions (In.)
		Net. Wt.		Net. Wt.							No.		9/32”	No.									Dimensions (In.)
	Model	(Lbs.)	Model	(Lbs.)		Volts			Phase	kW	Elements		Dia.	Circuits				A	B		C		D	E	H	K	L	M
ADH-005		8	ADHT-005	10		480		3		5	3	10		1				5-5/8	20-3/8	28-1/8		4		1/4	2-1/2	3-1/2	11-1/8	9-1/2
ADH-010		15	ADHT-010	20		480		3		10	6	10		1				7-5/8	20-3/8	28-1/8		6		1/4	3-1/2	3-1/2	11-1/8	9-1/2
ADH-015		25	ADHT-015	30		480		3		15	9	12		1				9-5/8	20-3/8	28-1/8		8		1/4	3	3-1/2	11-1/8	9-1/2
ADH-020		35	ADHT-020	40		480		3		20	12	14		1			11-5/8		20-3/8	28-1/8		10		1/4	2-3/4	3-1/2	11-1/8	9-1/2
ADH-025		40	ADHT-025	50		480		3		25	15	14		1			13-5/8		20-3/8	28-1/8		12		1/4	3-1/4	3-1/2	11-1/8	9-1/2
ADH-030		55	ADHT-030	65		480		3		30	18	14		1			15-5/8		20-3/8	28-1/4		14		3/8	3-3/4	3-1/2	11-1/8	9-1/2
ADH-035		65	ADHT-035	80		480		3		35	21	14		1			17-5/8		20-3/8	28-1/4		16		3/8	4-1/4	3-1/2	11-1/8	9-1/2
ADH-040		70	ADHT-040	90		480		3		40	24	14		2			19-5/8		20-3/8	28-1/4		18		3/8	4-3/4	3-1/2	11-1/8	9-1/2
ADH-045		80	ADHT-045	100		480		3		45	27	14		2			21-5/8		20-3/8	28-1/4		20		3/8	5-1/4	3-1/2	11-1/8	9-1/2
ADH-050		90	ADHT-050	110		480		3		50	30	14		2			23-5/8		20-3/8	28-1/4		22		3/8	5-3/4	3-1/2	11-1/8	9-1/2
ADH-060		105	ADHT-060	130		480		3		60	36	18		2			27-5/8		20-3/8	28-1/4		26		3/8	4-1/2	3-1/2	11-1/8	9-1/2
ADH-080		140	ADHT-080	175		480		3		80	48	22		4			35-5/8		20-3/8	28-1/4		34		3/8	4-3/8	3-1/2	11-1/8	9-1/2
ADH-090		160	ADHT-090	200		480		3		90	54	22		5			39-5/8		20-3/8	28-1/4		38		3/8	4-7/8	3-1/2	11-1/8	9-1/2
ADH-100		175	ADHT-100	220		480		3		100	60	22		5			43-5/8		20-3/8	28-1/4		42		3/8	5-3/8	3-1/2	11-1/8	9-1/2
	—	—	ADHT-120	205		480		3		120	36	18		4			27-5/8		35	42-7/8		26		3/8	4-1/2	3-1/2	11-1/8	9-1/2
ADH-144		165	—	—		480		3		144	48	22		4			35-5/8		35	42-7/8		34		3/8	4-3/8	3-1/2	11-1/8	9-1/2
	—	—	ADHT-160	270		480		3		160	48	22		8			35-5/8		35	42-7/8		34		3/8	4-3/8	3-1/2	11-1/8	9-1/2
ADH-162		185	—	—		480		3		162	54	22		6			39-5/8		35	42-7/8		38		3/8	4-7/8	3-1/2	11-1/8	9-1/2
	—	—	ADHT-180	305		480		3		180	54	22		6			39-5/8		35	42-7/8		38		3/8	4-7/8	3-1/2	11-1/8	9-1/2
ADH-216F		240	—	—		480		3		216	72	22		6			27-5/8		35	42-7/8		26		3/8	4-1/2	3-7/8	20	18-3/8
	—	—	ADHT-240F	400		480		3		240	72	22		8			27-5/8		35	42-7/8		26		3/8	4-1/2	3-7/8	20	18-3/8
ADH-270F		300	—	—		480		3		270	90	22		8			33-5/8		35	42-7/8		32		3/8	5-1/2	3-7/8	20	18-3/8
	—	—	ADHT-300F	500		480		3		300	90	22		10			33-5/8		35	42-7/8		32		3/8	5-1/2	3-7/8	20	18-3/8




				Type ADH																	Type ADHT


					Airflow
					Airflow																		Airflow
					Direction																		Airflow
					Direction																		Direction




			Figure 1 — Dimensions																Figure 2 — Dimensions

GENERAL

WARNING: This heater is not intended for use in hazardous atmospheres where flammable vapors, gases, liquids or other combustible atmospheres are present as defined in the National Electrical Code. Failure to comply can result in explosion or fire.

1.Heater construction characteristics —

A.Alloy sheathed tubular elements, .475” diameter

B.Steel flange

C.Stainless steel support construction

D.High temperature alloy terminals and connections

E.Replaceable individual heating elements

F.Wiring terminals located outside the heated zone

2.Maximum Temperatures — Types ADH and ADHT process air heaters can generally be used at the following maximum temperatures shown, provided the minimum air velocity is maintained uniformly through the heater.

Air Velocity		Max. Outlet Air Temp. (˚F)
Air Velocity
(Ft./Sec.)	ADH		ADHT
4	800		1050
9	800		1100
16	800		1150
25	800		1200
36	800		1200

CAUTION: Do not energize heater in air with a velocity less than 1 Ft. Per Second.

3.The heater may be bolted to the duct with the terminal housing and flange at the top, at either side or at the bottom.

4.Several heaters may be mounted in tandem so long as proper controls are used to limit the maximum temperature attained.

5.Installation with duct transitions in some air distribution systems, the duct heater may be considerably larger than the ductwork and the duct area must be increased by a sheet metal transition. The slope of the transformation piece on the upstream side of the equipment is limited to 30° as indicated in Figure 3. On the leaving side, the slope should not be more than 45°.

	30"	45˚
	Max	45˚
	Air	<![if ! IE]> <![endif]>Heater
	Flow	<![if ! IE]> <![endif]>Duct
		<![if ! IE]> <![endif]>Duct
	30˚	45˚
		Max
Figure 3	4 Ft. Min.	4 Ft. Min.
Figure 3

6.Use moisture proof terminal cover in atmospheres bearing corrosive fumes or excessive moisture.

7.Use explosion resistant heaters in explosive atmospheres and reduce current rating to elements.

8.Gas tight design — Achieved by the use of threaded fittings with fiber washers to attach heating elements to flange — pre vents leakage of ducted air into terminal housing.

9.Overtemperature protection — Thermocouple fastened to the element sheath surface and wired to a terminal block can be provided for accurate overheat protection (standard on ADHT models).

10.Flange mounting gasket — Packed separately with each duct heater to minimize air leakage between the flange and air duct. Refer to Table B and Figure 3.

Specifications — Table B

Flange Gasket				Used On
Part No.		Flange Size		ADH and ADHT
168-055429-001		11-1/8 x 5-5/8		5 kW
168-055429-002		11-1/8 x 7-5/8		10 kW
168-055429-003		11-1/8 x 9-5/8		15 kW
168-055429-004		11-1/8 x 11-5/8		20 kW
168-055429-005		11-1/8 x 13-5/8		25 kW
168-055429-006		11-1/8 x 15-5/8		30 kW
168-055429-007		11-1/8 x 17-5/8		35 kW
168-055429-008		11-1/8 x 19-5/8		40 kW
168-055429-009		11-1/8 x 21-5/8		45 kW
168-055429-010		11-1/8 x 23-5/8		50 kW
168-055429-011		11-1/8 x 27-5/8		60, 120 kW
168-055429-013		11-1/8 x 35-5/8		80, 144, 160 kW
168-055429-014		11-1/8 x 39-5/8		90, 162, 180 kW
168-055429-015		11-1/8 x 43-5/8		100 kW
168-055429-017		20 x 27-5/8		216, 240 kW
168-055429-018		20 x 33-5/8		270, 300 kW

			2-1/2" x 1-1/4" x 3/4"
			2-1/2" x 1-1/4" x 3/4"
				Knockouts
	Flange
	Flange
Mounting
	Gasket



				Duct Wall
Figure 4

INSTALLATION

WARNING: Hazard of Electric Shock. Disconnect all power before installing heater.

1.Locate and position heater in duct in accordance with both process requirements and recommendations given.

2.Refer to Figures 1 and 2, layout “D” and “M” dimensions on duct mounting face established in step 1.

3.With tools suitable for sheet metal work, cut layout opening in duct.

4.In general, heaters less than 35 pounds in weight may be mounted directly in opening without additional duct reinforcement if duct installation and condition permits. To fasten heater to duct wall use #14 pan or round head self-tapping screws. The flange mounting gasket supplied with the heater is recommended for insertion between heater flange and duct to minimize air leakage.

5.For heater weights greater than 35 pounds (see Specifications Table A, page 1) due consideration should be given to; (a) mechanically strengthening duct work with, for example, angle irons or chains (see Figure 5), and (b) heat insulating duct line

in immediate area of heater location to prevent excessive heat loss. Consult your local sheet metal contractor.

Duct	Chains
	Chains
	Duct
Heater	Metal
Opening	Strapping
Angle Iron	Heater Opening
Angle Iron

Figure 5

6.In high ambient temperature operations, least corrosive action and least oxidation to the terminals will occur if the heaters are mounted with the terminals in the coolest possible ambient, usually on the bottom or side of the duct.

A.Minimum duct size is “A” or “L” dimension +3/8” and “B” dimension +1-5/8”.

INSTALLATION

7.DANGER: Hazard of Fire. Since these heaters are capable of developing high temperatures, extreme care should be taken to:

A.Avoid installing heaters in an atmosphere containing combustible gases and vapors.

B.Avoid contact between heater and combustible material.

C.Keep combustible materials far enough away to be free of the effects of high temperatures.

ADH Low temperature duct heaters — can be fastened directly to the sheet metal duct work with bolts or sheet metal screws.

Duct

Air

Figure 6

ADHT High temperature duct heaters — are generally mounted on field fabricated stand off supports from the ductwork to position the heater such that the 3” insulation housing is in the same plane as the duct insulation.

Duct

Air

Air	Standoff Collar

Insulation

(3" max.)

Figure 7

Temperature Control Instructions

1.A Chromalox thermal cutout or thermostat is recommended for overheat protection and control of heater and process. Consult local Chromalox representative.

2.In general, place thermostat sensing element close to the heating elements, near top of duct, at right angles to the direction of air flow, and on the downstream side of the heater. Thermostat, provided with a manual reset button, is separately mounted.

3.For heater protection, the indicated maximum temperature of the control unit should be 50°F less than the actual maximum air temperature that will be permitted, to allow for overshoot.

4.Single circuit heater elements may be wired into two circuits to allow for partial heating and control. It is important to have thermal control wired into all electric power circuits, so that all elements may be protected from overheat.

WIRING

WARNING: Hazard of Electric Shock. Any installation involving electric heaters must be effectively grounded in accordance with the National Electrical Code to eliminate shock hazard.

1.All wiring should be done in accordance with National Electrical Code and with local codes by a qualified person.

2.Connect air heaters to same line voltage, phase, and frequency as on heater nameplate.

3.Teflon insulated nickel plated copper wire or bus bar is recommended for power connections to heater terminals and for wiring runs in heated zones. When ambient temperature in heated zone exceeds that for which insulated wire is recommended use bare nickel-plated copper with porcelain beads, tubing or bus bar. Consult local Chromalox representative.

4.Users should install adequate back-up controls and safety devices with their electric heating equipment. Selection of controls, thermostat, SCR units, contactors and etc. depends on the degree of accuracy required, reliability, electrical rating of heater and economic considerations.

5.Below is an example of a standard ADH-015, 480V 3 Ø 15 kW,

wired with recommended back-up controls. (Figure 8)

6.Individual terminal blocks with threaded stud type terminals are provided for each circuit to permit quick positive attachment of circuit wiring conductors (one terminal block per circuit). (Figure 9)

L1	G

L2	L3

Terminal block (303-027852-001)

X Circuit label indicated here.

Figure 9

ADH-015, 15 kW 480V 3ø, 1 Circuit
(9) - 480V, 1667 Watt Elements
(9) - 480V, 1667 Watt Elements		Magnetic
	Fused	Magnetic
		Contactor	Terminal
		Contactor	Terminal
	Switch		Block
L1				L1
L2				L2
L2
L3				L3

Control

ADH-015

Voltage

120 or 240V

Customer Supplied Wiring

Thermostat

Factory Supplied Wiring

Figure 8

Control Switch

+ 5 hidden pages