The Chromalox PF450-5 VUH Vertical Unit Heater offers efficient heating solutions for various indoor spaces. With its powerful heating capacities ranging from 5 to 10 kW, it can effectively warm areas up to 102 to 120 sq. ft. The unit features multiple voltage compatibility (208-277V) and a durable construction with a weight of 48 lbs. It requires a minimum mounting height of 7 feet for safety and can be mounted using brackets, hangers, or chains (not included). The PF450-5 comes with a junction box for easy access to relays and wiring, allowing for simple installation and maintenance.
The Chromalox PF450-5 VUH Vertical Unit Heater offers efficient heating solutions for various indoor spaces. With its powerful heating capacities ranging from 5 to 10 kW, it can effectively warm areas up to 102 to 120 sq. ft. The unit features multiple voltage compatibility (208-277V) and a durable construction with a weight of 48 lbs. It requires a minimum mounting height of 7 feet for safety and can be mounted using brackets, hangers, or chains (not included). The PF450-5 comes with a junction box for easy access to relays and wiring, allowing for simple installation and maintenance.
© 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
ABCDEFHM
(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 per-
sonal 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 com-
bustible 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 dam-
age. 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 sus-
pend 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 sus-
pend 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
L1
L1
L2
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 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.
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.
L1
L1
L2
C1
C1
C2
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
L1
L1
L2
C1
C1
C2
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
L1
L1
L2
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
L1
L1
L2
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: 1-800-368-2493 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.
-
1
-
2
-
3
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4
The Chromalox PF450-5 VUH Vertical Unit Heater offers efficient heating solutions for various indoor spaces. With its powerful heating capacities ranging from 5 to 10 kW, it can effectively warm areas up to 102 to 120 sq. ft. The unit features multiple voltage compatibility (208-277V) and a durable construction with a weight of 48 lbs. It requires a minimum mounting height of 7 feet for safety and can be mounted using brackets, hangers, or chains (not included). The PF450-5 comes with a junction box for easy access to relays and wiring, allowing for simple installation and maintenance.
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