Chromalox PF451-3 Air Conditioner User Manual

Installation, Operation
SERVICE REFERENCE
DIVISION
and
4
SECTION
SALES
REFERENCE
RENEWAL PARTS IDENTIFICATION
VUH
PF451-3
(Supersedes PF451-2)
161-057823-001
JULY, 2002
DATE
Type VUH Vertical Unit Heater
Position With
Junction Box
Facing Away
From Walls
For Easy Access
48" Min.
F
Approx.
12" Min.
H
D
4-11/16" Dia.
Mounting
Holes
A
E
B
M
4-11/16" Dia.
Mounting Holes
Note:
Knockout Location
See Table 2
For Recommended
Conduit Size.
7' Min.
To Floor
CL
Warm Air
Discharge
C
Figure 2
Figure 1
Specifications — Table 1
Heating Capacity
Model
Volts
1
3
Phase Phase
kW
BTUH
VUH-C-15 15
51,000
—
68,000
—
19.5
VUH-C-20
Max.
Mtg.
Outlet Height
Temp.˚F* (Ft.)
CFM
FPM
1300
1600
93
1300
1600
1300
1600
Dimensions (In.)
A
B
C
D
E
F
H
M
25
14
13-1/2
26
4-5/8
8-3/8
6
7-1/4
12-5/8
85
104
23
14
13-1/2
26
4-5/8
8-3/8
6
7-1/4
12-5/8
85
115
20
14
13-1/2
26
4-5/8
8-3/8
6
7-1/4
12-5/8
85
480
85,000
—
480
* 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.
Mtg.
Weight
(Lbs.)
208
20
VUH-C-25 25
208
240
480
Air Delivery
Table 2 - Electrical Data
Power Supply Circuit
Model
VUH-C-15
VUH-C-20
VUH-C-25
kW
15
19.5
20
25
Volts
208
240
480
240
480
480
Phase
3
3
3
3
3
3
Line
Amps
(Note 1)
Line
Wire Size
(Note 2)
No.
Circuits
43
37
19
48
25
31
6
8
10
6
8
8
1
1
1
1
1
1
Minimum
Conduit
Size †
(In.)
1
1
1/2
1
3/4
3/4
Contactor
Holding Coil
Volt Ampheres
(Note 3)
Inrush
Sealed
52
9
52
9
52
9
Motor
Volts
208
240
480
240
480
480
H.P.
Phase
1/6
3
1/6
3
1/6
3
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.
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.
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
(85 pounds for VUH-C-15, 20, 25 plus the weight of the supports).
WARNING: This heater is not recommended 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
explosion or fire. For these applications see
Bulletin PDS CXH-EP (PF305).
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.
WARNING: Hazard of Shock. Disconnect all power
before installing heater.
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.
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.
INSTALLATION
WARNING: Hazard of Shock. Any installation
involving electric heaters must be effectively
grounded in accordance with the National
Electrical Code.
1. Heater should be positioned with the junction box facing away
from walls to provide easy access for servicing relay(s)
mounted within.
WARNING: Mount the heater for down discharge
only.
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.
WARNING: 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 total weight of the heater installation (85
pounds for VUH-C-15, 20, 25 plus the weight of the supports).
3. The heater may 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 as defined
in the NEC.
WARNING: Use Copper conductors only.
5. Rough-in wiring to heater. See Table 2 for line amperes, recommended 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.
WARNING: 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.
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.
MAINTENANCE
WARNING: Hazard of Shock. 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.
WIRING DIAGRAMS
480V Motor Hook-Up
8
5
7
4
1
6
7
Elements
10
M
5
8
4
M
3
1
2
10
6
10
6
4
11
2
To Fuses
7
Elements
9
11
208 - 240V Motor Hook-Up
9
3
5
8
11
208 - 240V Motor Hook-Up
9
3
M
1
2
KTK-4
KTK-4
Cutout
Cutout
Transformer Color Code Index
Contactor
X1
T1 T2 T3
C1
L1 L2 L3
VOLT
H1
208 BLK
240 BLK
277 BLK
X2
XFMR
Fusing
Optional
XFMR
H1
H2
L1 L2 L3 TB1
TB2 C1 C2
T1 T2 T3
C1
L1 L2 L3
PRI XFMR 120V SEC. 24V SEC.
LEAD CLRS LEAD CLRS LEAD CLRS
X1
X2
BLK WHT
BLK WHT
BLK WHT
X1
YEL
YEL
YEL
X2
BLU
BLU
BLU
480 BLK BLK/RED BLK WHT
YEL
BLU
H2
RED
ORG
BRN
L1 L2 L3 TB1
TB2 C1 C2
3ø
Power
60 HZ
Thermostat
(By Others)
3ø
Power
60 HZ
Thermostat
(By Others)
Customer Wiring
Factory Wire
Customer Wiring
Factory Wire
Figure 3
Figure 4
7
10
6
4
5
Fused Switch
(By Others)
Control Power
(By Others)
Fused Switch
(By Others)
Elements
Contactor
Transformer Color Code Index
8
M
1
2
11
208 - 240V Motor Hook-Up
9
3
KTK-4
Cutout
VOLT
208 - 240V
Motor Hook-Up
PRI XFMR 120V SEC. 24V SEC. 480V Motor Hook-Up
LEAD CLRS LEAD CLRS LEAD CLRS
6
9
H1
X1
X2
BLK WHT
BLK WHT
BLK WHT
YEL
YEL
YEL
BLU
BLU
480 BLK BLK/RED BLK WHT
YEL
BLU
H2
208 BLK
240 BLK
RED
ORG
277 BLK
BRN
X1
X2
BLU
8
5
7
Elements
7
4
1
M
4
11
3
2
To Fuses
10
6
10
8
11
5
M
1
2
9
3
KTK-4
Customer Wiring
Factory Wire
T1 T2 T3
C1
L1 L2 L3
Cutout
Contactor
XFMR
Thermostat
(By Others)
Heat
X1
X2
H1
H2
Contactor
T1 T2 T3
C1
L1 L2 L3
T1 T2 T3
C3
L3
L1 L2
L1 L2 L3 TB1
TB2 C1 C2
Thermostat
(By Others)
Fan
3ø
Power
60 HZ
2 PDT
Switch
(By Others)
Fused Switch
(By Others)
Customer Wiring
Factory Wire
7
Elements
Optional Heat
Recovery switch
(By Others)
XFMR
Fusing
Optional
L1 L2 L3 TB1
3ø
Power
60 HZ
Fused Switch
(By Others)
10
6
4
5
1
Thermostat
(By Others)
8
11
M
2
9
3
208 - 240V
Motor Hook-Up
KTK-4
T1 T2 T3
C1
L1 L2 L3
Contactor
T1 T2 T3
Contactor
C3
L3
L1 L2
Cutout
Fan
2 PDT
Switch
(By Others)
TB2 C1 C2
Figure 6
Figure 5
Heat
C4 TB2
L1 L2 L3 TB1
C4 C2 C1 TB2
3ø
Power
60 HZ
Optional Heat
Recovery switch
(By Others)
Figure 7
Fused 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.
RENEWAL PARTS IDENTIFICATION
MANUFACTURER PART NUMBER BREAKDOWN
(LOCATED ON UNIT NAMEPLATE)
V U
H
C
Common Parts
Diagram
Item No.
Description
Part No.
4
Fan
112-510499-001
5
Grille
134-130439-001
6
Overheat Cutout
300-024283-004
Controls
Code
No.
Elements and Motor
Code
kW Volts Phase
No.
15-83
15-23
15-43
20-23
20-43
25-43
208
15 240
480
19.5 240
20 480
25 480
3
Element
Part No.
(Item 1)
Motor
Part No.
(Item 2)
118-130437-007 (3)
118-130437-004 (3)
118-130437-005 (3)
193-057647-001
118-130437-007 (3)
118-130437-008 (3)
118-130437-011 (3)
NOTES: Number in parenthesis ( ) indicates quanitity required of that part.
Part
Number
Description
Contactor-24V Coil (30A)
30-00 Contactor-24V Coil (50A)
Transformer
Contactor-24V Coil (30A)
31-00
Contactor-24V Coil (50A)
Contactor-120V Coil (30A)
32-00 Contactor-120V Coil (50A)
Transformer
Contactor-120V Coil (30A)
32-45 Contactor-120V Coil (50A)
Transformer
Contactor-120V Coil (30A)
33-00
Contactor-120V Coil (50A)
Contactor-208/240V Coil (30A)
34-00
Contactor-208/240V Coil (50A)
Contactor-208/240V Coil (30A)
34-45
Contactor-208/240V Coil (50A)
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
072-303180-003
072-303180-014
072-303180-003
072-303180-014
Diag. Wiring
Wiring Diagram
Item Dia.
Part No.
No. Figure
3
3
7
3
3
3
3
7
3
3
7
3
3
3
3
3
3
3
170-057688-006
4
170-057688-007
3
170-057688-006
6
170-057688-009
4
170-057688-007
5
170-057688-008
7
170-057688-010
Optional Transformer Fusing
Fan Motor
Fuse Type
Part No.
KTK-3
128-047763-007 (2)
Motor Fusing
Contactor
Fuse Type
Part No.
KTK-4
128-047763-008 (3)
Transformer
Grille
Heating Element
Fan Blade
Overheat Cutout
Limited Warranty:
Please refer to the Chromalox limited warranty applicable to this product at
http://www.chromalox.com/customer-service/policies/termsofsale.aspx.
2150 N. RULON WHITE BLVD., OGDEN, UT 84404
Phone: 1-800-368-2493
www.chromalox.com