Chromalox VUH-C-05, VUH-C-07, VUH-C-10 Installation Instructions And Renewal Parts Identification

© 2010 Chromalox®, Inc.

VUH Vertical Unit Heater

Specifications — Table 1

* Based on 60˚F entering air.
** For use with drop ceiling only. Installation in a drop ceiling should be in accordance with NFPA-90A and Article 300-22 of (NEC).
*** For instructions on VUH units rated 15-25 kW refer to Bulletin PF451; VUH units rated 30-50 refer to Bulletin PF452.

17"

Anemostat**
Diffuser

Drop
Ceiling

3-7/8"

8-1/2"

12" Min.

30" Min.

4-11/16" Dia.
Mounting
Holes

A

B

C

4-11/16" Dia.

Mounting

Holes

Note:

Knockout Location
See Table 2
For Recommended
Conduit Size.

Figure 1

Figure 2

F

Approx.

H

D

E

12" Min.

30" Min.

M

7' Min.

To Floor

C

L

Position With
Junction Box
Facing Away
From Walls
For Easy Access

Warm Air

Discharge

4-11/16" Dia.

Mounting Holes

Heating Capacity Volts Air Delivery Data

Max.

Dimensions (In.)

Mtg.

Model

1 3 Outlet

Mtg. Weight

kW BTUH

Phase Phase

CFM FPM

Temp.˚F*

Height

ABCD EFHM

(Lbs.)

(Ft.)

208 208

VUH-C-05 5 17,000 240 240 450 703 102 10 14 13-1/2 26 3-1/4 6-5/8 4 7-1/4 10-5/8 48

277 480

208 208

VUH-C-07 7.5 25,500 240 240 550 880 102 12 14 13-1/2 26 3-1/4 6-5/8 4 7-1/4 10-5/8 48

277 480

9.8 208 208

VUH-C-10

10

34,000

240 240

712 1160 104 14 14 13-1/2 26 3-1/4 6-5/8 4 7-1/4 10-5/8 48

277 480

DIVISION 4 SECTION

VUH

SALES

REFERENCE

DATE

SERVICE REFERENCE

PF450-5

161-057822-001

JULY, 2002

Installation Instructions

and

RENEWAL PARTS IDENTIFICATION

(Supersedes PF450-4)

IMPORTANT

Failure to understand and follow these installation instructions
and the “WARNING” notes therein may result in serious per­sonal injury from electrical shock, or from the heater falling due
to faulty installation.

FIRE/EXPLOSION HAZARD. 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 personal injury or property damage.

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 per-

sonal in accordance with the National Electrical
Code, NFPA 70.

The heater must be mounted at least 7’ above the floor to prevent
accidental contact with the heating elements or fan blade which
could cause injury.

The ceiling structure, the brackets, hangers or chains used to sus­pend the heater, and the anchoring provisions must be of sufficient
strength to support the combined weight of the heater installation
(48 pounds for VUH-C-05, 07, 10 plus the weight of the supports).

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 fastened to the motor shaft.

On models connected to three-phase power, fan blade rotation
must be checked. If airflow is not downward, interchange any two
of the three customer power leads.

First stage of thermostat must be connected to terminals C1 and
C2 to insure proper operation of overheat protective devices.

INSTALLATION

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. Heater should be positioned with the junction box facing away

from walls to provide easy access for servicing relay(s)
mounted within. See Figure 1.

Mount the heater for down discharge only. Failure
to comply may result in personal injury or property
damage.

2. It is important that the 12” minimum dimension shown in

Figure 1 be maintained to make it possible for a serviceman to
remove the fan motor, if necessary, without moving the heater
from its mounting.

The heater must be mounted at least
7’ above the floor to prevent accidental contact
with the heating elements or fan blade which
could cause personal injury.

The ceiling structure, the brackets, hangers or chains used to sus­pend the heater and the anchoring provisions must be of sufficient
strength to support the total weight of the heater installation (48
pounds for VUH-C-05, 07, 10 plus the weight of the supports).

3. The heater to be mounted to the ceiling by attaching rigid

angle brackets, hangers, or chains to the four mounting holes
on the top of the heater case using four 5/8” bolts (by others).
See Figures 1 and 2.

Note: Brackets, hangers, or chains to support the heater are
supplied by the customer.

4. All wiring should be done in accordance with local codes and

the National Electrical Code by a qualified person.

Power Supply Circuit

Contactor

Holding Coil

Motor

Model

Minimum Volt Ampheres

kW Volts Phase

Line Line

No.

Conduit (Note 3)Amps Wire Size

Circuits

Size †(Note 1) (Note 2)

Inrush Sealed

Volts H.P. Phase

208 1 25 8 1 3/4” 208/240
208 3 15 12 1 1/2” 280/240
240 1 22 10 1 1/2” 208/240

VUH-C-05 5

240 3 13 12 1 1/2”

60 9

208/240

1/25 1

277 1 19 10 1 1/2” 277
480 3 7 14 1 1/2” 480

208 1 37 6 1 3/4” 208/240
208 3 22 10 1 1/2” 208/240
240 1 32 8 1 3/4” 208/240

VUH-C-07 7.5

240 3 19 10 1 1/2”

60 9

208/240

1/25 1

277 1 28 8 1 3/4” 277
480 3 10 14 1 1/2” 480

9.8

208 1 48 6 1 3/4” 208/240
208 3 29 8 1 3/4” 208/240

240 1 43 6 1 3/4” 208/240

VUH-C-10 10

240 3 25 8 1 3/4”

60 9

208/240

1/25 1

277 1 37 6 1 3/4” 277
480 3 13 12 1 1/2” 480

Table 2 - Electrical Data

Notes:

1. Includes Fan Motor Amps.

2. Use 75˚C Wire - Copper Conductors only.

3. Standard units have one contactor. Units with separate fan

motor control use two contactors.

† Conduit knockout location - top of Junction Box.

WIRING DIAGRAMS

VOLT

Transformer Color Code Index

PRI XFMR

LEAD CLRS

120V SEC.

LEAD CLRS

24V SEC.

LEAD CLRS

208
240
277
480

H1
BLK
BLK
BLK

BLK

X1
BLK
BLK
BLK

BLK

X2
WHT
WHT
WHT

WHT

X1
YEL
YEL
YEL

YEL

X2
BLU
BLU
BLU

BLU

H2
RED
ORG
BRN

BLK/RED

L1L1L2

C1

C1

X1

C2

TB2

Customer Wiring
Factory Wire

XFMR
Fusing
Optional

XFMR

L3

L2 L3

T4

T1 T3

X2

H1 H2

Thermostat
(By Others)

Contactor

Cutout

Elements

3ø Jumper
Hook-Up

Fused Switch
(By Others)

3ø
Power
60 HZ

WHT
RED

TB1

YEL

M

BLU

BLK

208 - 240V Motor

Hook-Up

T1

T2

M

277V Motor

Hook-Up

BLK BLK

L1 L2 L3 T4

1ø Power

1ø Jumper
Hook-Up

TB1

To Contactor

WHT

RED

T1

T2

YEL

M

BLU

480V Motor

Hook-Up

BLK

T2

Figure 3

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 fas­tened 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 operat­ing 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 com­pressed air to remove accumulated dust or lint, which other­wise may restrict proper air flow.

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

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 lubri­cated. Relubricate annually, if neccessary, with No. 10 non-detergent oil.

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

L1L1L2

C1C1C2

TB2

Customer Wiring
Factory Wire

L3

L2

L3

T4

T1 T2 T3

Thermostat
(By Others)

Contactor

Cutout

Elements

3ø Jumper
Hook-Up

Fused Switch
(By Others)

3ø
Power
60 HZ

Control
Power
(By Others)

WHT

WHT

RED

RED

T1

T2

T1

TB1

T2

YEL

YEL

M

M

M

BLU

BLU

BLK

208 - 240V Motor

Hook-Up

277V Motor

Hook-Up

480V Motor

Hook-Up

BLK BLK

BLK

L1 L2 L3 T4

1ø Power

1ø Jumper
Hook-Up

TB1

To Contactor

Figure 4

L1 L2 L3 T4

L1L1L2

C1C1C2

TB2

Customer Wiring
Factory Wire

L3

L2

L3

T4

T1 T2 T3

Thermostat
(By Others)

Contactor

Cutout

Elements

3ø Jumper
Hook-Up

Fused Switch
(By Others)

3ø
Power
60 HZ

1ø Power

1ø Jumper
Hook-Up

WHT

WHT

RED

RED

T1

T2

T1

TB1

TB1

To Contactor

T2

YEL

YEL

M

M

M

BLU

BLU

BLK

208 - 240V Motor

Hook-Up

277V Motor

Hook-Up

480V Motor

Hook-Up

BLK BLK

BLK

Figure 5

VOLT

Transformer Color Code Index

PRI XFMR

LEAD CLRS

120V SEC.

LEAD CLRS

24V SEC.

LEAD CLRS

208
240
277
480

H1
BLK
BLK
BLK

BLK

X1
BLK
BLK
BLK

BLK

X2
WHT
WHT
WHT

WHT

X1
YEL
YEL
YEL

YEL

X2
BLU
BLU
BLU

BLU

H2

RED
ORG
BRN

BLK/RED

L1 L2 L3 T4

L1L1L2

C2

C4

C1

X1

C1

TB2

TB2

Customer Wiring
Factory Wire

XFMR
Fusing
Optional

XFMR

L3

L2 L3

T4

T1 T2

T3

X2

H1

Heat

Fan

H2

L1

C3

L2

L3

T1 T2 T3

Thermostat
(By Others)

2 PDT Switch
(By Others)

Optional Heat Recovery Switch
(By Others)

Contactor

Cutout

Elements

3ø Jumper
Hook-Up

Fused Switch
(By Others)

3ø
Power
60 HZ

1ø Power

1ø Jumper
Hook-Up

WHT

WHT

RED

RED

T1

T2

T1

TB1

TB1

To Contactor

T2

YEL

YEL

M

M

M

BLU

BLU

BLK

208 - 240V

Motor

Hook-Up

277V Motor

Hook-Up

480V Motor

Hook-Up

BLK BLK

BLK

Figure 6

L1 L2 L3 T4

L1L1L2

C2

C4

C1

C1

TB2

Customer Wiring
Factory Wire

L3

L2 L3

T4

T1 T2

T3

Heat

Fan

L1

C3

L2

L3

T1 T2 T3

Thermostat
(By Others)

2 PDT Switch
(By Others)

Optional Heat Recovery Switch
(By Others)

Contactor Contactor

Cutout

Elements

3ø Jumper
Hook-Up

Fused Switch
(By Others)

3ø
Power
60 HZ

1ø Power

1ø Jumper
Hook-Up

WHT

RED

TB1

TB1

To Contactor

YEL

M

BLU

BLK

208 - 240V

Motor

Hook-Up

Figure 7

2150 N. RULON WHITE BLVD., OGDEN, UT 84404

Phone: [phone] www.chromalox.com

MANUFACTURER PART NUMBER BREAKDOWN

(LOCATED ON UNIT NAMEPLATE)

Fuse Type Part Number

KTK-3 128-047763-007 (2)

RENEWAL PARTS IDENTIFICATION

V

Diagram

Description Part No.

Item No.

5 Grille 134-130456-001
6 Overheat Cutout 300-024283-003

Common Parts

Optional Transformer Fusing

Element Motor Fan

Code

kW Volts Phase Part No. Part No. Part No.

Nos.

(Item No. 1) (Item No. 2) (Item No. 4)

05-81

208

1

118-130480-001 (3)

05-83 3

193-057699-001

05-21

5 240

1

118-130480-003 (3)

112-130398-001

05-23 3
05-71 277 1 118-130480-004 (3) 193-057700-001
05-43 480 3 118-130480-005 (3) 193-057699-001
07-81

208

1

118-130480-002 (3)

07-83 3

193-057699-001

07-21

7.5 240

1

118-130480-017 (3)

112-130398-002

07-23 3
07-71 277 1 118-130480-007 (3) 193-057700-001
07-43 480 3 118-130480-008 (3) 193-057699-001
10-81

9.8 208

1

118-130480-009 (3)

10-83 3

193-057699-001

10-21

240

1

118-130480-002 (3)

112-130398-003

10-23

10

3
10-71 277 1 118-130480-006 (3) 193-057700-001
10-43 480 3 118-130480-010 (3) 193-057699-001

Code Part

Dia. Wiring

Wiring Diagram

Nos.

Description

Number

Item Dia.

Part No.

No. Figure

Contactor-24V Coil (30A) 072-303180-001 3

30-00 Contactor-24V Coil (50A) 072-303180-002 3 3 170-057688-001

Transformer 315-304252-002 7
Contactor-24V Coil (30A) 072-303180-001 3

31-00

Contactor-24V Coil (50A) 072-303180-002 3

4 170-057688-002

Contactor-120V Coil (30A) 072-303180-007 3

32-00 Contactor-120V Coil (50A) 072-303180-008 3 3 170-057688-001

Transformer 315-304252-001 7
Contactor-120V Coil (30A) 072-303180-007 3

32-45 Contactor-120V Coil (50A) 072-303180-008 3 6 170-057688-004

Transformer 315-304252-001 7
Contactor-120V Coil (30A) 072-303180-007 3

33-00

Contactor-120V Coil (50A) 072-303180-008 3

4 170-057688-002

Contactor-208/240V Coil (30A) 072-303180-013 3

34-00

Contactor-208/240V Coil (50A) 072-303180-014 3

5 170-057688-003

Contactor-208/240V Coil (30A) 072-303180-013 3

34-45

Contactor-208/240V Coil (50A) 072-303180-014 3

7 170-057688-005

U H C

Elements, Motor and Fan

Controls

NOTES: Number in parenthesis ( ) indicates quanitity required of that part.



Heating Element



Fan Motor



Contactor



Fan Blade



Grille



Overheat Cutout



Transformer

Limited Warranty:

Please refer to the Chromalox limited warranty applicable to this product at

http://www.chromalox.com/customer-service/policies/termsofsale.aspx.