SERVICE REFERENCE
Installation, Operation
DIVISION
SALES
4
SECTION VUH
and
REFERENCE
(Supersedes PF451-2)
PF451-3
RENEWAL PARTS IDENTIFICATION
161-057823-001
DATE
JULY, 2002
Type VUH Vertical Unit Heater
Position With
Junction Box
Facing Away
From Walls
48" Min.
Note:
For Easy Access
Knockout Location
See Table 2
12" Min.
F
4-11/16" Dia.
H
A
Approx.
Mounting
Holes
For Recommended
Conduit Size.
D
E
B
M
4-11/16" Dia.
Mounting Holes
7' Min.
To Floor
C
L
Warm Air
Discharge
C
Figure 1
Volts
Figure 2
Specifications — Table 1
Heating Capacity
Model
Air Delivery
FPM
Dimensions (In.)
Max.
Mtg.
Height
(Ft.)
Mtg.
Weight
(Lbs.)
1
3
Outlet
Temp.˚F*
kW
BTUH
CFM
A
B
C
D
E
F
H
M
Phase Phase
208
240
480
VUH-C-15 15
51,000
—
1300
1600
93
25
14
13-1/2
26
4-5/8
8-3/8
6
7-1/4 12-5/8
85
19.5
VUH-C-20
20
208
480
480
68,000
85,000
—
—
1300
1300
1600
1600
104
115
23
20
14
14
13-1/2
13-1/2
26
26
4-5/8
4-5/8
8-3/8
8-3/8
6
6
7-1/4 12-5/8
7-1/4 12-5/8
85
85
VUH-C-25 25
* Based on 60˚F entering air.
** For instructions on VUH units rated 5-10 kW refer to Bulletin PF450; VUH units rated 30-50 refer to Bulletin PF452.
© 2010 Chromalox®, Inc.
MAINTENANCE
1. Before activating for next heating season, vacuum or use com-
WARNING: Hazard of Shock. 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.
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
480V Motor Hook-Up
7
10
2
Elements
6
8
6
9
7
10
2
8
5
Elements
6
8
11
208 - 240V Motor Hook-Up
9
3
10
11
4
1
5
M
M
11
208 - 240V Motor Hook-Up
9
3
4
1
7
4
5
M
1
3
2
To Fuses
KTK-4
KTK-4
Cutout
Cutout
Transformer Color Code Index
T1 T2 T3
T1 T2 T3
C1
L1
PRI XFMR 120V SEC.
VOLT LEAD CLRS LEAD CLRS
24V SEC.
LEAD CLRS
C1
Contactor
Contactor
L2 L3
L1
L3
L2
H1
208 BLK
240 BLK
277 BLK
H2
X1
X2
X1
X2
X1
X2
RED
ORG
BRN
BLK WHT YEL BLU
BLK WHT YEL BLU
BLK WHT YEL BLU
XFMR
L1 L2 L3
TB1
Fusing
Optional
XFMR
3ø
H1
H2
480
Power
60 HZ
BLK BLK/RED BLK WHT YEL BLU
TB1
L1 L2 L3
C1 C2
TB2
Thermostat
(By Others)
3ø
Power
60 HZ
Fused Switch
(By Others)
C1 C2
TB2
Thermostat
(By Others)
Control Power
(By Others)
Fused Switch
(By Others)
Customer Wiring
Factory Wire
Customer Wiring
Factory Wire
Figure 3
Figure 4
7
10
8
Transformer Color Code Index
PRI XFMR 120V SEC.
VOLT LEAD CLRS LEAD CLRS LEAD CLRS
208 - 240V
Elements
6
Motor Hook-Up
24V SEC. 480V Motor Hook-Up
7
10
11
4
1
Elements
6
9
5
6
8
M
208 - 240V Motor Hook-Up
9
3
8
5
H1
208 BLK
240 BLK
277 BLK
H2
X1
X2
X1
X2
10
11
11
4
RED
ORG
BRN
BLK WHT YEL BLU
BLK WHT YEL BLU
BLK WHT YEL BLU
M
5
M
2
7
4
2
9
KTK-4
1
3
1
2
3
480
To Fuses
BLK BLK/RED BLK WHT YEL BLU
Cutout
KTK-4
Customer Wiring
Factory Wire
T1 T2 T3
Cutout
Contactor
C1
L1
Contactor
T2
T1 T2 T3
T1
C1
L1
T3
XFMR
L2 L3
Thermostat
(By Others)
C3
X1
H1
X2
H2
L2 L3
L3
L1
L2
Heat
Fan
L1 L2 L3
TB1
C1 C2
TB2
Thermostat
(By Others)
TB1
L1 L2 L3
3ø
Power
60 HZ
XFMR
Fusing
Optional
C1 C2
C4 TB2 TB2
2 PDT
3ø
Power
60 HZ
Switch
(By Others)
Fused Switch
(By Others)
Optional Heat
Recovery switch
(By Others)
Fused Switch
(By Others)
Customer Wiring
Factory Wire
Figure 6
Figure 5
7
10
Elements
6
8
11
4
5
M
2
208 - 240V
Motor Hook-Up
9
3
1
Thermostat
(By Others)
KTK-4
T2
T1
C1
L1
T3
T1 T2 T3
C3
Contactor
Contactor
L2 L3
L3
L1
L2
Heat
Fan
Cutout
TB1
L1 L2 L3
TB2
C4 C2 C1
2 PDT
Switch
3ø
Power
60 HZ
(By Others)
Fused Switch
(By Others)
Optional Heat
Recovery switch
(By Others)
Note: All fan motors are totally enclosed and internally thermal overload protected.
Customer Wiring
Factory Wire
MOTOR LUBRICATION
Motors in VUH-C-15 through VUH-C-25 have sleeve bearings which are factory lubricated.
Figure 7
RENEWAL PARTS IDENTIFICATION
MANUFACTURER PART NUMBER BREAKDOWN
(LOCATED ON UNIT NAMEPLATE)
V
U
H
C
Common Parts
Diagram
Item No.
Description
Part No.
4
5
6
Fan
112-510499-001
134-130439-001
Grille
Controls
Overheat Cutout 300-024283-004
Diag. Wiring
Item Dia.
No. Figure
Code
No.
Part
Number
Wiring Diagram
Part No.
Description
Elements and Motor
Contactor-24V Coil (30A)
30-00 Contactor-24V Coil (50A)
Transformer
072-303180-001
072-303180-002
315-304252-002
072-303180-001
072-303180-002
072-303180-007
072-303180-008
315-304252-001
072-303180-007
072-303180-008
315-304252-001
072-303180-007
072-303180-008
3
Element
Part No.
(Item 1)
Motor
Part No.
(Item 2)
3
7
3
3
3
3
7
3
3
7
3
3
3
3
3
3
3
4
3
170-057688-006
170-057688-007
170-057688-006
Code
kW Volts Phase
No.
Contactor-24V Coil (30A)
Contactor-24V Coil (50A)
31-00
15-83
15-23 15 240
15-43 480
20-23 19.5 240
20-43 20 480
25-43 25 480
208
118-130437-007 (3)
118-130437-004 (3)
118-130437-005 (3)
118-130437-007 (3)
118-130437-008 (3)
118-130437-011 (3)
Contactor-120V Coil (30A)
32-00 Contactor-120V Coil (50A)
Transformer
Contactor-120V Coil (30A)
32-45 Contactor-120V Coil (50A)
Transformer
3
193-057647-001
6
170-057688-009
NOTES: Number in parenthesis ( ) indicates quanitity required of that part.
Contactor-120V Coil (30A)
Contactor-120V Coil (50A)
33-00
4
5
7
170-057688-007
170-057688-008
170-057688-010
Contactor-208/240V Coil (30A) 072-303180-003
Contactor-208/240V Coil (50A) 072-303180-014
Contactor-208/240V Coil (30A) 072-303180-003
Contactor-208/240V Coil (50A) 072-303180-014
34-00
34-45
Optional Transformer Fusing
Fuse Type
Part No.
KTK-3
128-047763-007 (2)
Motor Fusing
Fuse Type
KTK-4
Fan Motor
ꢁ
Part No.
128-047763-008 (3)
Contactor
ꢂ
ꢆ
Transformer
Grille
ꢄ
Heating Element
ꢀ
Fan Blade
ꢃ
Overheat Cutout
ꢅ
Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: 1-800-368-2493
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