Chromalox PD444-2 installation instructions Installation, Wiring, Flexible Conduit Fittings

INSTALLATION

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

1.Before installing the type GTF heater, inspect it for possible dam- age which may have occurred during shipment. Also, check to insure that the line voltage is the same as that stamped on the nameplate.

2.IMPORTANT: Mount heater in the tank so the liquid level will always be above the effective heated portion of the heater. Provide expansion tank if necessary.

FIRE HAZARD. If the heater is not properly sub- merged, the heating elements will overheat and could result in a fire or damaged equipment.

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

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

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

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

A.Avoid contact between heater and combustible material.

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

WIRING

ELECTRIC SHOCK HAZARD. Any installation involving electric heaters must be performed by a qualified person and must be effectively grounded in accordance with the National Electrical Code to eliminate shock hazard.

1.Electrical wiring to heater must be installed in accordance with the National Electrical Code and local electrical codes by a quali- fied person.

2.When element wattages are not equal, heaters must not be con- nected in series.

3.Under no condition should the conduit be cut shorter, or fumes will enter the cable and will be drawn into the heater and condense inside. The wiring will then be attacked and will shorten heater life.

4.Tamperproof wiring — epoxy imbedded prevents field rewire of individual elements.

Representative wiring diagrams for heaters with Single use fuse (F) or Resetable fuse (RF) —

Single phase heater circuit using a SPST thermostat. Line Voltage and/or current do not exceed thermostat or thermal fuse rating (Figure 3).

Ground			Green
L2			Black
L1	*	*	Black
Fused	Thermal Fuse
	Thermostat
Disconnect
(Customer Supplied)
	Figure 3		Heater

One Single phase heater or (3) single phase heaters equal in size and each having a thermal fuse wired as a 3 phase heater circuit using a DPST thermostat. Line voltage and current do not exceed thermostat or thermal fuse(s) rating (Figure 4). Dotted line and L3 indicates 3 phase connections.

Single phase or 3 phase heater circuit. Line voltage and/or current exceeds thermostat or thermal fuses ratings (Figure 5). Dotted line and L3 indicates 3 phase connections.

Ground	Green
		Black
L3
L2		Black
L1
Fused Disconnect		Black
L2		Heater
L1	*	*
Thermostat		Magnetic
(Customer Supplied)		Contactor
		Thermal Fuses
		Figure 5

Flexible Conduit Fittings —

Washer		Ferrule	Nut	Conduit
		Insert
			Sealing
Locknut	Body		Insert

1.Cut conduit. Slide nut and sealing insert onto the conduit.

2.Screw the ferrule insert into one end of the flexible conduit.

3.Seat the ferrule insert inside of the body, seat the sealing insert and hand tighten the cap onto the body.

4.Repeat steps 1 thru 3 above for the other end of the conduit after pulling the wires.

5.If the fitting is used in a threaded hole, first thread the body into the hole then follow steps 1 thru 3.

6.If the fitting is used thru an opening* use the locknut and plastic washer to fasten it.

Ground	Green		* Opening for 1/2” NPT thread is 7/8”.
L3	*	*
L2	*	*	Black
L1	*	*
Fused	Thermostat	Thermal Fuses
Disconnect
(Customer Supplied)
		Black	Black
			Heater

Figure 4