Chromalox PD411-10 installation instructions Blck, Blcs, Installation, SPECIFICATIONS cont’d

SPECIFICATIONS (cont’d.)

BLCK, BLCS

Type BLCK-MH					1-1/4” Ground Joint
					Malleable Iron Union
					1-1/4” Round
					Floor Flange
	(A)
					Malleable Iron
		4 to 12 Blades			1-1/4” Steel
			(C)		Pipe Riser
				(B)

Specifications –

1-1/4” Pipe Opening

			C
			L of Mtg. Hole
			same as Dim. “A”
		Suspension Bracket
		(4-5/32)
(A)	(C)			Type BLCS
		4 to 12 Blades

(B)

				Kilowats				Dimensions (In.)
	No.		Regular Oil	Fuel Oil			(A)	(B) Min. Tank
Model	Blades	Phase	18 W/in2	12 W/in2	40 W/in2	Voltage	Riser Height	Opening Clearance	(C)
BLCK-MH618	6	1 or 3 ￿	12	7.5	–	240 or 480	144	16-1/2	8-7/8
BLCK-MH824	8	1 or 3 ￿	16	10	–	240 or 480	144	16-1/2	12
BLCK-MH103	10	1 or 3 ￿	20	12.5	–	240 or 480	144	16-1/2	15-1/8
BLCK-MH236	12	1 or 3 ￿	24	15	–	240 or 480	144	16-1/2	18-1/4
BLCS-618	6	1 or 3 ￿	12	7.5	–	240 or 480	144	34	8-7/8
BLCS-824	8	1 or 3 ￿	16	10	–	240 or 480	144	34	12
BLCS-1030	10	1 or 3 ￿	20	12.5	–	240 or 480	144	34	15-1/8
BLCS-1236	12	1 or 3 ￿	24	15	–	240 or 480	144	34	18-1/4

FIRE HAZARD. An integral thermostat, if provided, is designed for temperature control service only. Because the thermostat does not fail safe, it should not be used for temperature limiting duty. Wiring to this device is the responsibility of the user.

The system designer is responsible for the safety of this equipment and should install adequate back-up controls and safety devices with their

electric heating equipment. Where the conse- quences of failure could result in personal injury or property damage, back-up controls are essential.

FIRE/EXPLOSION HAZARD. Use only Explosion Resistant Enclosures (E2, E3 or ER) in hazardous atmospheres where flammable vapors, gases, liquids or other combustible atmospheres are present as defined in the National Electrical Code (NFPA 70). Failure to comply could result in personal injury or property damage.

INSTALLATION

ELECTRIC SHOCK HAZARD. Disconnect all power before installing or servicing heater. Failure to do so could result in personal injury or property dam- age. Heater must be installed by a qualified person in accordance with the National Electrical Code, NFPA 70.

1.Before installing, check your Over-The-Side heater for any dam- age that may have occurred during shipment. Also, check to ensure that the line voltage is the same as that stamped on the nameplate.

2.Do not bend heating elements. If bending is necessary, consult factory.

3.IMPORTANT: Mount the heater in the tank so that the liquid level will always be above the effective heated portion of the heater. If the heater is not properly submerged, it will overheat and damage the heating elements and create a possible fire hazard due to excessive sheath temperatures. See “Warning” under “Installation” section. (see Figure 3).

4.Heater must be supported from tank bottom. Heater must not be operated in sludge. Sludge legs can be provided. Assemble as shown in Figure 3.

5.Where work will pass over or near equipment, additional protec- tion, such as a metal guard, may be needed.

6.In the electroplating operation the heaters are not, under any cir- cumstance, to be placed between the electrodes and the work.

7.When melting solids by direct immersion, a surface vent should be provided to allow gases to escape. Operate the heater on half volt- age until melted material completely covers the heater area.

8.A drip loop is recommended to minimize passage of moisture along wiring into terminal enclosure and connections.

FIRE HAZARD. Since heaters are capable of developing high temperatures, extreme care should be taken to:

A.Use explosion-resistant terminal enclosures in hazardous loca- tions. Consult Chromalox for selection of explosion-resistant terminal enclosures for hazardous locations.

B.Avoid contact between heater and combustible materials.

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

FREEZE HAZARD. Some Over-The-Side heaters are equipped with a thermowell for process control or over-temperature control. Do not allow moisture to accumulate in thermowell. Freezing temperatures can cause damage that may result in the heated medium leaking into terminal enclosure.

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