Chromalox PF450-5 specifications Maintenance, Wiring Diagrams, Motor Lubrication

MAINTENANCE

5.Rough-in wiring to heater. See Table 2 for line amperes, rec- ommended wire size and conduit size.

6.Wire heater per wiring diagram supplied with this instruction sheet.

Note: Power relay(s) are provided as standard on all heaters.

Prior to operating the heater, verify that the fan hub setscrews are tightened and the push-on clip is secured to assure that the fan blade is securely fas- tened to the motor shaft. Failure to comply could result in personal injury or property damage.

7.Carefully inspect the completed installation. Rotate the fan blade by hand to be sure that it turns freely. Investigate any binding, rubbing or interference.

8.Air diffusers for deflecting the air are optional. See Instruction Sheet PF449 for installation instructions.

ELECTRIC SHOCK HAZARD. Disconnect all power to heater before servicing or replacing heaters. Do not attempt to service heater while unit is operat- ing as there is hazard of electric shock, injury from operating fan, and burns from hot heating elements.

1.Before activating for next heating season, vacuum or use com- pressed air to remove accumulated dust or lint, which other- wise may restrict proper air flow.

2.Periodically check all electrical connections and retighten to avoid electrical wiring difficulties.

WIRING DIAGRAMS

	Transformer Color Code Index
	PRI XFMR		120V SEC.		24V SEC.		Elements
VOLT	LEAD CLRS		LEAD CLRS LEAD CLRS
	H1	H2	X1	X2	X1	X2
208	BLK	RED	BLK	WHT	YEL	BLU
240	BLK	ORG	BLK	WHT	YEL	BLU
277	BLK	BRN	BLK	WHT	YEL	BLU
480	BLK	BLK/RED	BLK	WHT	YEL	BLU
				Cutout
					Contactor		T1		T2 T3
							C1	L2 L3
							L1
			X1	X2
					XFMR
		XFMR			Fusing
					Optional
			H1	H2
							L1		L2	L3	T4

208 - 240V Motor

Hook-Up

BLKBLU

M

WHTYEL RED

3ø Jumper

Hook-Up

TB1

277V Motor

Hook-Up

M

BLK BLK

T1 T2

480V Motor
Hook-Up
	RED
BLK	M	BLU
WHT		YEL
T1		T2

To Contactor

1ø Jumper

Hook-Up

TB2

Customer Wiring
Factory Wire		Elements
	Cutout
	Contactor	T1	T2		T3
		C1
		L1 L2 L3
C1 C2	Thermostat
	(By Others)	L1	L2	L3		T4

208 - 240V Motor

Hook-Up

BLKBLU

M

WHTYEL RED

3ø Jumper

Hook-Up

TB1

277V Motor

Hook-Up

M

BLK BLK

T1 T2

480V Motor
Hook-Up
	RED
BLK	M	BLU
WHT		YEL
T1		T2

To Contactor

1ø Jumper

Hook-Up

	3ø
TB2 C1 C2 Thermostat	Power
(By Others)	60 HZ
Customer Wiring	Fused Switch
	(By Others)
Factory Wire

L1 L2 L3 T4 TB1

1ø Power

Control

Power

(By Others)

3ø Power 60 HZ

Fused Switch

(By Others)

L1 L2 L3 T4 TB1

1ø Power

Figure 3

Figure 4

	Customer Wiring					208 - 240V Motor
						Hook-Up
	Factory Wire		Elements
							BLU
						BLK
						M
						WHT	YEL
						RED
		Cutout
		Contactor	T1	T2 T3
			C1	L2 L3
			L1
						3ø Jumper
						Hook-Up
TB2	C1 C2	Thermostat	L1 L2 L3		T4	TB1
		(By Others)				3ø
						Power
						60 HZ
						Fused Switch
						(By Others)

277V Motor

Hook-Up

M

BLK BLK

T1 T2

480V Motor
Hook-Up
	RED
BLK	M	BLU
WHT		YEL
T1		T2

To Contactor

1ø Jumper

Hook-Up

L1 L2 L3 T4 TB1

1ø Power

Transformer Color Code Index
PRI XFMR	120V SEC. 24V SEC.	Elements	208 - 240V
VOLT LEAD CLRS	LEAD CLRS LEAD CLRS		Motor
			Hook-Up

H1

H2

X1

X2

X1

X2

BLK

BLU

208

BLK

RED

BLK

WHT

YEL

BLU

240

BLK

ORG

BLK

WHT

YEL

BLU

M

277

BLK

BRN

BLK

WHT

YEL

BLU

480 BLK BLK/RED BLK WHT

YEL

BLU

WHT

YEL

Customer Wiring

RED

Factory Wire

2 PDT Switch

Cutout

Contactor

(By Others)

XFMR

T1

T2

T3

T1

T2

T3

Thermostat

X1

X2

C1

L2 L3

C3

L3

(By Others)

L1

L1 L2

Heat

H1

H2

3ø Jumper

Hook-Up

Fan

C4 TB2

TB2 C2 C1

XFMR

L1 L2

L3

T4

TB1

Fusing

3ø

Optional

Power

60 HZ

Optional Heat Recovery Switch	Fused Switch
(By Others)	(By Others)

277V Motor

Hook-Up

M

BLK BLK

T1 T2

480V Motor
Hook-Up
	RED
BLK	M	BLU
WHT		YEL
T1		T2

To Contactor

1ø Jumper

Hook-Up

L1 L2 L3 T4 TB1

1ø Power

Figure 5

Customer Wiring		208 - 240V
	Elements	Motor
Factory Wire		Hook-Up

Figure 6

2 PDT Switch (By Others)

Thermostat (By Others)

Heat

Fan

								BLK		BLU
									M
								WHT		YEL
								RED
			T1	T2	T3			T1	T2	T3
			C1				Contactor	C3		Contactor
			L1	L2 L3				L1 L2		L3
		Cutout
							3ø Jumper
							Hook-Up
C4	C2 C1	TB2	L1 L2 L3			T4	TB1

To Contactor

1ø Jumper Hook-Up

Note: For 208-240V motor wiring, red and yellow motor wires to be connected at T2 terminal.

MOTOR LUBRICATION

Motors in VUH-C-05 through VUH-C-10 have sleeve bearings which are factory lubri- cated. Relubricate annually, if neccessary, with No. 10 non-detergent oil.

Note: All fan motors are totally enclosed and internally thermal overload protected.

	3ø
	Power
	60 HZ
Optional Heat Recovery Switch	Fused Switch
(By Others)
	(By Others)

L1 L2 L3 T4 TB1

1ø Power

Figure 7