T--357 Manual
SERVICE PARTS/OPERATION
for
MCC Heater Units 12-XXXX Series
T--357
REV. 11/2014
© 2012 Mobile Climate Control
Table of Contents
SAFETY SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Safety-1
UNIT SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Spec-1
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service-1
SERVICE PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
CONFIGURATION IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
GENERAL NOTES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
1.1 MCC Heater Unit 12-11632 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
1.2 MCC Heater 12-11634 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3
1.3 MCC Front Defroster 12-60046 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
1.4 MCC Front Defroster 12-60056 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6
1.5 MCC Front Defroster 12-60058 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8
1.6 MCC Front Defroster 12-60060 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10
1.7 MCC Front Defroster 12-60064 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12
1.8 MCC Front Defroster 12-60070 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14
1.9 MCC Heater Unit 12-70276 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
16
1.10 MCC Heater Unit 12-70278 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
18
1.11 MCC Heater Unit 12-70282 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
20
1.12 MCC Heater Unit 12-70284 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
22
1.13 MCC Heater Unit 12-70286 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24
1.14 MCC Heater Unit 12-70288 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
26
1.15 MCC Heater Unit 12-70292 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28
1.16 MCC Heater Unit 12-70294 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
1.17 MCC Heater Unit 12-7558 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
1.18 MCC Heater Unit 12-8340 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33
1.18 Heater Unit 12-8340 Parts List Continued): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34
1.19 MCC Heater Unit 12-8364 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
35
1.19 Heater Unit 12-8364 Parts List Continued): . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36
List of Figures
Figure 1-1 Schematic for Models 12-11632 & 12-11634 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-2 Schematic for Models 12-60046 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-3 Schematic for Models 12-60056 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-4 Schematic for Models 12-60058 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-5 Schematic for Models 12-60060 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-6 Schematic for Models 12-60064 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-7 Schematic for Models 12-60070 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-8 Schematic for Models 12-70276 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
© 2012 Mobile Climate Control
1
T-357 Rev. 11/2014
37
38
39
40
41
42
43
44
List of Figures (Continued)
Figure 1-9 Schematic for Models 12-70278 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-10 Schematic for Models 12-70282 & 12-70284 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-11 Schematic for Models 12-70286,12-70288, 12-70292 &12-70294 . . . . . . . . . . . . . . . . . .
Figure 1-12 Schematic for Models 12-7558 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-13 Schematic for Models 12-8340 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 1-14 Schematic for Models 12-8364 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
© 2012 Mobile Climate Control
2
T-357 Rev. 11/2014
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46
47
48
49
50
SAFETY SUMMARY
GENERAL SAFETY NOTICES
The following general safety notices supplement the specific warnings and cautions appearing elsewhere in this
manual. They are recommended precautions that must be understood and applied during operation and
maintenance of the equipment covered herein. A listing of the specific warnings and cautions appearing
elsewhere in the manual follows the general safety notices.
FIRST AID
An injury, no matter how slight, should never go unattended. Always obtain first aid or medical attention
immediately.
OPERATING PRECAUTIONS
Always wear safety glasses.
Keep hands, clothing and tools clear of the evaporator and condenser fans.
No work should be performed on the unit until all circuit breakers and start-stop switches are placed in the OFF
position, and power supply is disconnected.
Always work in pairs. Never work on the equipment alone.
In case of severe vibration or unusual noise, stop the unit and investigate.
MAINTENANCE PRECAUTIONS
Beware of unannounced starting of the evaporator and condenser fans. Do not open the unit cover before
turning power off.
Be sure power is turned off before working on motors, controllers, solenoid valves and electrical controls. Tag
circuit breaker and power supply to prevent accidental energizing of circuit.
Do not bypass any electrical safety devices, e.g. bridging an overload, or using any sort of jumper wires.
Problems with the system should be diagnosed, and any necessary repairs performed, by qualified service
personnel.
When performing any arc welding on the unit, disconnect all wire harness connectors from the modules in the
control box. Do not remove wire harness from the modules unless you are grounded to the unit frame with a
static-safe wrist strap.
In case of electrical fire, open circuit switch and extinguish with CO2 (never use water).
SPECIFIC WARNINGS AND CAUTIONS
WARNING
Be sure to observe warnings listed in the safety summary in the front of this manual before per­
forming maintenance on the hvac system
WARNING
Read the entire procedure before beginning work. Park the coach on a level surface, with park­
ing brake applied. Turn main electrical disconnect switch to the off position.
© 2012 Mobile Climate Control
Safety-1
T-357 Rev. 11/2014
SPECIFIC WARNINGS AND CAUTIONS - Continued:
WARNING
Units must never be operated without an air filter present. Doing so will result in accumulation
of dirt and debris in heater coil, blower, and electrical components. This will require more effort
to remove and restore proper system operation, as well as increase potential for higher resist­
ance at electrical components and connections. Higher resistance will result in higher thermal
potential.
WARNING
Battery disconnect should be off.
WARNING
Extreme care must be taken when opening the coolant system. Coolant may be hot, and expos­
ure to the skin and eyes could result in injury.
CAUTION
Use care when checking/manipulating wires/plugs attached to electrical components. Dam­
age to the component or wiring harness can occur.
© 2012 Mobile Climate Control
Safety-2
T-357 Rev. 11/2014
UNIT SPECIFICATIONS
Model
Heating
Airflow
Capacity BTU/H CFM
Volts
Amps @27 vdc Amps @ 27 vdc Amps @ 27 vdc
Low Speed
Medium Speed High Speed
Motor Type
Weight
lbs.
12-11632
25,828
215
24
3.4
5.0
6.2
Brushless
11.5
12-11634
25,828
215
24
3.4
5.0
6.2
Brushless
11.5
12-60046
53,810
520
24
Variable
Variable
13.8
Brushless
52
12-60056
50,500
467
24
N/A
N/A
7.8
Brushless
52
12-60058
59,000
571
24
6.1
8.3
13
Brushless
52.3
12-60060
62,776
549
24
5.8
7.3
11.2
Brushless
46
12-60064
63,477
553
24
5.7
7.3
11.2
Brushless
38
12-60070
56,880
462
24
5.4
7.0
8.5
Brushless
42
12-70276
38,080
327
24
5.9
7.6
N/A
Brushless
35.5
12-70278
38,080
327
24
5.9
7.6
N/A
Brushless
35.5
12-70282
43,000
389
24
3.8
N/A
10.3
Perm. Magnet
35
12-70284
43,000
389
24
3.8
N/A
10.3
Perm. Magnet
35
12-70286
44,860
420
24
5.7
N/A
11.6
Brushless
35
12-70288
44,860
420
24
5.7
N/A
11.6
Brushless
35
12-70292
41,380
388
24
5.6
N/A
11
Brushless
35
12-70294
41,380
388
24
5.6
N/A
11
Brushless
35
12-7558
66,000
500
24
4.5
7.2
10.5
Brushless
48.5
12-8340
33600
260
24
1.9
N/A
4.9
Brushless
N/A
12-8364
33600
260
24
1.9
N/A
4.9
Brushless
N/A
Note:
Heating Capacity rated at 3.6 GPM @ 150°FΔ
Airflow Rated at 27 VDC/ 0” Static Pressure (Bench Test).
© 2012 Mobile Climate Control
Spec-- 1
T-357 Rev.
11/2014
MAINTENANCE
GENERAL NOTICES
The MCC Heater units are virtually maintenance free. However, the following items should be followed to help
ensure maximum efficiency of system, as well as avoid potential system related problems.
NOTE:
Frequency associated with maintenance intervals will vary according to operational conditions and geo­
graphic regions. Inspection frequency should be scheduled accordingly.
Air Filters
All units are equipped with air filters to prevent foreign materials from entering system components. Filters
should be cleaned or replaced as part of a regular scheduled maintenance program. Failure to maintain air filters
will result in diminished system capacity related to lack of airflow.
WARNING
Units must never be operated without an air filter present. Doing so will result in accumulation
of dirt and debris in heater coil, blower, and electrical components. This will require more effort
to remove and restore proper system operation, as well as increase potential for higher resist­
ance at electrical components and connections. Higher resistance will result in higher thermal
potential.
Heater Coils
Proper maintenance of air filters will reduce the potential of dirt and debris entering the heater coils. Heater coils
are of a tube and fin design. If the coils are determined to require cleaning, only low pressure air, or vacuuming
should be used as a method of cleaning. Care should be taken not to bend the fins of heater coil in the process. If
this occurs, the coil will have diminished airflow and capacity, and will require the fins to be “combed” to restore
to designed requirements.
Blower/Fan
Blowers/Fans should be inspected during routine maintenance for abnormal vibration and smooth rotation.
Proper blower speed operation should be part of this inspection. If dirt and debris build up is found, the motor
and blower should be wiped clean.
Blowers are supplied as an assembly, and if improper operation is determined, they should be replaced as an
assembly. Please refer to the parts section of this manual to determine proper replacement part number.
Electrical Wiring and Connections
WARNING
Be sure power is turned off before working on motors, controllers, solenoid valves and electrical
controls. Tag circuit breaker and power supply to prevent accidental energizing of circuit.
Electrical
Inspection of all electrical connections and harnesses should be part of the routine maintenance procedures.
Wiring should be inspected for any signs of chafing and/or dirt and corrosion. If any occurrences of these
conditions are observed, the deficiencies must be corrected to reduce potential related risks that may occur.
Actuator Motors
If equipped, Actuator motors and associated linkages should be checked for proper operation to avoid potential
problems or failures.
© 2012 Mobile Climate Control
Service-- 1
T-357 Rev.
11/2014
SECTION 1
SERVICE PARTS
INTRODUCTION
This section provides identification of service replacement parts for the Mobile Climate Control
Heater/Defrosters with part numbers beginning with 12.
CONFIGURATION IDENTIFICATION
Unit identification information is provided on a plate (decal) located on the unit assembly. This plate provides
the unit model number and the unit serial number. The model number identifies the unit configuration and
differences in detailed parts.
GENERAL NOTES
To find replacement parts, determine major group in which replacement parts are located and turn to the
appropriate page for the illustrated breakdown of the replacement parts. The following letter designations are
used to classify parts throughout this list. Parts can be obtained by ordering from the following website:
www.mcc-hvac.com
A/R As Required
N.S. Not Shown on Illustration
NSI Non-Stock Item (Items may not be available for purchase, or may require extended lead times)
NSS Not Sold Separately - Order next higher assembly or kit.
P-Suffix P-- added to part number means part is available in packaged quantity only.
PL
Purchase Locally
SS
Stainless Steel
SV
Suffix SV added to part number designates service replacement part.
© 2012 Mobile Climate Control
1
T-357
Rev. 11/2014
1.1 MCC Heater Unit 12-11632
8
1
10
4
5
9
3
2
6
1
2
3
4
5
6
7
8
9
10
N.S.
7
13430
13431
14524
15-0484
25-2530
16534
22-1222
26-1619
28-0007
28-0404
25-3345
© 2012 Mobile Climate Control
Latch
Latch Hook
Hinge
Blower Assembly
Al. Housed Resistor
Cover Plug
Coil Assembly
Permatron Filter
Grommet 1-3/8” (34.92mm)
Protective Cap, ⅞” (22.22mm)
Wire Harness
2
1
1
2
1
1
2
1
1
2
2
NSI
T-357
Rev. 11/2014
1.2 MCC Heater 12-11634
8
1
4
6
5
3
2
7
9
10
1
2
3
4
5
6
7
8
9
10
N.S.
13430
13431
14524
15-0484
25-2530
16534
22-1222
26-1619
28-0007
28-0404
25-3345
© 2012 Mobile Climate Control
Latch
Latch Hook
Hinge
Blower Assembly
Al. Housed Resistor
Cover Plug
Coil Assembly
Permatron Filter
Grommet 1-3/8” (34.92mm)
Protective Cap, ⅞” (22.22mm)
Wire Harness
3
1
1
2
1
1
2
1
1
2
2
NSI
T-357
Rev. 11/2014
1.3 MCC Front Defroster 12-60046
16
6
14
12
20
7
5
4
1
17
10
13
21
19
18
11
11
9
15
2
22
3
8
Item
1
2
3
4
5
6
7
8
9
Part Number
15-1982
22-0226
26-0265
24-1257
24-1258
25-1124
25-0623
26-1714
28-0293
Description
Blower Assembly, 24V Includes:
Heater Coil
Air Filter Assembly
Link Arm
Flapper Arm
Relay 24V
Lever
Valve Assembly
Grommet
© 2012 Mobile Climate Control
4
Qty
1
1
1
1
1
1
1
1
2
T-357
Rev. 11/2014
1.3 Front Defroster 12-60046 (Parts List) Continued:
Item
10
11
12
13
14
15
16
17
18
19
20
21
22
N.S.
Part Number
28-0045
28-0007
28-0005
28-0029
28-0079
28-0014
28-0326
29-0075
29-0120
29-0077
35-0437
29-0443
27-2660
25-3056
Grommet
Grommet 1 ⅜” (34.9 mm)
Grommet ⅝” (15.9mm)
Bushing, ¼” (6.4mm)
Rubber Seal, 56.7 in. (1440 mm)
Grommet ⅜” (9.5 mm)
Snap Bushing, 3/16”
Receptacle
Stud Oval Slotted, SS
Retainer
24V Controller Assembly
Retaining Ring
Silicone Hose (All)
Wire Harness
Description
© 2012 Mobile Climate Control
5
Qty
1
6
1
1
1
1
4
3
3
3
1
1
A/R
NSI
T-357
Rev. 11/2014
1.4 MCC Front Defroster 12-60056
6
22
12
15
13
16
14
1
19
15
33
17
11
18
10
16
15
8
5
2
11
9
3
4
7
21
Item
1
2
3
4
5
6
7
8
9
Part Number
15-15078
22-0226
26-0265
26-0277
25-0022
25-1124
26-1714
27-0911
27-0910
Description
Blower Assembly, 24V Includes:
Heater Coil
Air Filter Assembly
Bushing
Clip
Relay 24V
Bowden Cable Valve Assembly
Drain Hose 12 in. (304.8mm)
Gear Clamp 3/4 in. (19.05 mm)
© 2012 Mobile Climate Control
6
Qty
1
1
1
1
1
1
1
1
4
T-357
Rev. 11/2014
1.4 Front Defroster 12-60056 (Parts List) Continued:
Item
10
11
12
13
14
15
16
17
18
19
20
21
22
Part Number
28-0004
28-0005
28-0079
28-0293
28-0045
28-0326
29-0424
29-0075
29-0120
29-0077
29-0424
27-0238
25-3554
© 2012 Mobile Climate Control
Description
Qty
2
6
1
1
1
4
3
3
3
3
1
A/R
NSI
Grommet ⅜” (9.53 mm)
Grommet ⅝” (15.9mm)
Rubber Seal, 2.23 in. (56.7mm)
Grommet
Grommet
Snap Bushing, 3/16”
Pushnut, 3/16”
Receptacle
Stud Oval Slotted, SS
Retainer
Hole Plug 3/8”
Silicone Hose
Wire Harness
7
T-357
Rev. 11/2014
1.5 MCC Front Defroster 12-60058
18
8
9
10
11,24
20
1,2
26
25
19
17
17
15
6
5
21,23
22
16
20
13 7
14
27
4
Item
1
2
3
4
5
6
7
8
9
3
12
Part Number
15-19176
25-2848
22-1266
23-0611
24-1257
24-1258
25-0022
25-0232
25-1124
Description
Blower Assembly, 24V Includes:
Al. Housed Resistor
Heater Coil
Air Filter Assembly
Link Arm
Flapper Arm
Clip
Rectifier
Relay 24V
© 2012 Mobile Climate Control
8
Qty
1
1
1
1
1
1
1
1
2
T-357
Rev. 11/2014
1.5 Front Defroster 12-60058 (Parts List) Continued:
Item
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
N.S.
Part Number
25-1309
25-2660
26-1843
27-0911
27-3176
28-0004
28-0005
28-0029
28-0079
28-0293
28-0326
29-0075
29-0076
29-0077
29-0124
29-0424
29-0443
37-0035
25-3347
© 2012 Mobile Climate Control
Description
Lever Assembly
Motor Actuator 24V
Motorized Valve Assembly
Drain Hose 12 in. (304.8mm)
Constant Torque Clamp .5-1.0 in. (14-27mm)
Grommet
Grommet ⅝” (15.9mm)
Bushing, ¼” (6.4mm)
Rubber Seal, 2.23 in. (56.7mm)
Grommet
Snap Bushing, 3/16”
Receptacle
Stud Oval Slotted, SS
Retainer
Nylon Spacer ½”
Pushnut 3/16”
Retaining Ring
4 Ply Silicone Hose
Wire Harness
9
Qty
1
1
1
1
4
1
6
2
1
1
3
3
3
3
3
2
1
A/R
NSI
T-357
Rev. 11/2014
1.6 MCC Front Defroster 12-60060
6
13
11
7
9
9
8
12
4
5
10
3
1,2
Item
1
2
3
4
5
6
7
N.S.
Part Number
15-15064
25-2848
22-1329
23-0657
29-0076
29-0075
25-1124
25-3414
© 2012 Mobile Climate Control
Description
Qty
1
1
1
1
3
3
2
NSI
Blower Assembly, 24V Includes:
Al. Housed Resistor
Heater Coil
Air Filter Assembly
Stud, Oval Slotted (SS)
Receptacle
Relay 24V
Wiring Harness
10
T-357
Rev. 11/2014
1.6 MCC Front Defroster 12-60060: Continued
Item
8
9
10
11
12
13
Part Number
28-0326
25-2660
46-0025
29-0124
28-0007
28-0045
© 2012 Mobile Climate Control
Description
Qty
2
2
1
6
5
1
Snap Bushing, 3/16”
Motor Actuator 24V
Motorized Valve Assembly
Nylon Spacer, ½” (13mm)
Grommet 1 ⅜” (34.9 mm)
Grommet
11
T-357
Rev. 11/2014
1.7 MCC Front Defroster 12-60064
7
8
9 ,11
6
9
3
4
5
10
Item
1
2
3
4
5
6
7
N.S.
Part Number
15-15064
25-3191
22-1355
23-0707
29-1110
29-0075
25-1124
25-3513
© 2012 Mobile Climate Control
1,2
12
Description
Qty
1
1
1
1
3
3
3
NSI
Blower Assembly, 24V Includes:
Al. Housed Resistor
Heater Coil
Air Filter
Stud, Oval Slotted (SS)
Receptacle
Relay 24V
Wiring Harness
12
T-357
Rev. 11/2014
1.7 MCC Front Defroster 12-60064: Continued
Item
8
9
10
11
12
Part Number
28-0326
25-2660
46-0047
29-0124
28-0008
© 2012 Mobile Climate Control
Description
Qty
2
2
1
6
2
Snap Bushing, 3/16”
Motor Actuator 24V
Heater Control Valve Assembly
Nylon Spacer, ½”
Grommet
13
T-357
Rev. 11/2014
1.8 MCC Front Defroster 12-60070
6
7
3
12
10
12
5
9
8
10
14
1,2
14
13
11
4
Item
1
2
3
4
5
6
7
N.S.
Part Number
15-15082
25-3191
22-1355
23-0707
29-1110
29-0075
25-1124
25-3513
© 2012 Mobile Climate Control
Description
Qty
1
1
1
1
3
3
3
NSI
Blower Assembly, 24V Includes:
Al. Housed Resistor
Heater Coil
Air Filter (Permatron)
Stud, Oval Slotted (SS)
Receptacle
Relay 24V
Wiring Harness
14
T-357
Rev. 11/2014
1.8 MCC Front Defroster 12-60070: Continued
Item
8
9
10
11
12
13
14
Part Number
28-0326
28-0011
25-2660
46-0047
29-0124
29-0558
28-0008
© 2012 Mobile Climate Control
Description
Qty
2
1
2
1
6
1
2
Snap Bushing, 3/16”
Snap In Plug, ½”
Motor Actuator 24V
Heater Control Valve Assembly
Nylon Spacer, ½”
Nylon Spacer, ⅞”
Grommet
15
T-357
Rev. 11/2014
1.9 MCC Heater Unit 12-70276
8
5
10
7
9
4
14
17
18
15
1,2
15
16
16
12
13,19
6
7
11
3
Item
1
2
3
4
5
6
7
8
9
Part Number
15-19190
25-2848
22-0895
24-3344
26-1292
28-0331
28-0005
25-0219
25-3343
© 2012 Mobile Climate Control
Description
Qty
1
1
1
1
1
1
2
2
NSI
Blower Assembly 24V, Includes:
Al. Housed Resistor
Heater Coil Assembly
Jumper Harness
Air Filter
Hole Plug ½”
Grommet ⅝”
Relay 24V
Wiring Harness
16
T-357
Rev. 11/2014
1.9 Heater Unit 12-70276 (Parts List) Continued:
Item
10
11
12
13
14
15
16
17
18
19
Part Number
25-0006
28-0008
28-0045
28-0335
29-0075
29-0077
29-1110
35-0835
28-0330
29-0124
© 2012 Mobile Climate Control
Description
Qty
1
2
1
1
1
6
6
1
2
1
Junction Block
Grommet
Grommet
Cable Clamp
Receptacle
Retainer
Stud, Oval Slotted
Temperature Sensor
⅜” Hole Plug
Spacer ½”
17
T-357
Rev. 11/2014
1.10 MCC Heater Unit 12-70278
4
7
13
12
11
5
11
6
15
14
1,2
12
13
8
9
10
3
Item
1
2
3
4
5
6
7
8
9
Part Number
15-19190
25-2848
22-0242
25-0219
25-3343
25-0006
26-1292
28-0005
28-0008
© 2012 Mobile Climate Control
Description
Qty
1
1
1
2
NSI
1
1
1
2
Blower Assembly 24V, Includes:
Al. Housed Resistor
Heater Coil Assembly
Relay 24V
Wiring Harness
Junction Block
Air Filter
Grommet ⅝”
Grommet
18
T-357
Rev. 11/2014
1.10 Heater Unit 12-70278 (Parts List) Continued:
Item
10
11
12
13
14
15
Part Number
28-0045
29-0075
29-0077
29-1110
28-0330
28-0331
© 2012 Mobile Climate Control
Description
Qty
1
1
1
1
1
1
Grommet
Receptacle
Retainer
Stud, Oval Slotted
⅜” Hole Plug
½” Hole Plug
19
T-357
Rev. 11/2014
1.11 MCC Heater Unit 12-70282
11,12
9
10
1,2
5
4
8
3
13
6
7
14
Item
1
2
3
4
N.S.
5
6
7
8
Part Number
15-19196
25-2841
22-0242
25-0251
25-3363
26-0264
28-0005
28-0008
28-0045
© 2012 Mobile Climate Control
Description
Qty
1
1
1
2
NSI
1
1
2
1
Blower Assembly 24V, Includes:
Al. Housed Resistor
Heater Coil Assembly
Relay, 12V
Wiring Harness
Air Filter
Grommet ⅝”
Grommet
Grommet
20
T-357
Rev. 11/2014
1.11 Heater Unit 12-70282 (Parts List Continued):
Item
9
10
11
12
13
14
Part Number
28-0330
28-0331
29-0075
29-0077
29-1031
29-1110
© 2012 Mobile Climate Control
Description
Qty
1
1
6
6
8
6
⅜” Hole Plug
½” Hole Plug
Receptacle
Retainer
Knurled Nut ¼”
Stud Oval Slotted
21
T-357
Rev. 11/2014
1.12 MCC Heater Unit 12-70284
5
4
9
8
13
1,2
6
10,11
12
3
7
Item
1
2
3
4
N.S.
5
6
7
8
Part Number
15-19196
25-2841
22-0895
25-0251
25-3363
26-0264
28-0005
28-0008
28-0014
© 2012 Mobile Climate Control
Description
Qty
1
1
1
2
NSI
1
1
2
1
Blower Assembly 24V, Includes:
Al. Housed Resistor
Heater Coil Assembly
Relay, 12V
Wiring Harness
Air Filter
Grommet ⅝”
Grommet
Grommet ⅜”
22
T-357
Rev. 11/2014
1.12 Heater Unit 12-70284 (Parts List Continued):
Item
9
10
11
12
13
Part Number
28-0045
29-0075
29-0077
29-1031
29-1110
© 2012 Mobile Climate Control
Description
Qty
1
6
6
8
6
Grommet
Receptacle
Retainer
Knurled Nut ¼”
Stud Oval Slotted
23
T-357
Rev. 11/2014
1.13 MCC Heater Unit 12-70286
10
5
11
1
12
2
4
9
13
3
8
6
7
14
Item
1
2
3
N.S.
4
5
6
7
8
Part Number
15-19190
25-2848
22-0895
25-3384
26-0264
28-0331
28-0005
28-0008
28-0014
© 2012 Mobile Climate Control
Description
Qty
1
1
1
NSI
1
1
1
2
1
Blower Assembly 24V, Includes:
Al. Housed Resistor
Heater Coil Assembly
Wiring Harness
Air Filter
Hole Plug ½”
Grommet ⅝”
Grommet
Grommet ⅜”
24
T-357
Rev. 11/2014
1.13 Heater Unit 12-70286 (Parts List) Continued:
Item
9
10
11
12
13
14
Part Number
28-0045
25-0219
29-0075
29-0077
29-1110
29-1031
© 2012 Mobile Climate Control
Description
Qty
1
2
6
6
6
8
Grommet
Relay 24V
Receptacle
Retainer
Stud, Oval Slotted
Knurled Nut, ¼” x 20
25
T-357
Rev. 11/2014
1.14 MCC Heater Unit 12-70288
10
5
1
2
4
11
12
9
13
3
8
6
7
14
Item
1
2
3
N.S.
4
5
6
7
8
Part Number
15-19190
25-2848
22-0242
25-3384
26-0264
28-0331
28-0005
28-0008
28-0014
© 2012 Mobile Climate Control
Description
Qty
1
1
1
NSI
1
1
1
2
1
Blower Assembly 24V, Includes:
Al. Housed Resistor
Heater Coil Assembly
Wiring Harness
Air Filter
Hole Plug ½”
Grommet ⅝”
Grommet
Grommet ⅜”
26
T-357
Rev. 11/2014
1.14 Heater Unit 12-70288 (Parts List) Continued:
Item
9
10
11
12
13
14
Part Number
28-0045
25-0219
29-0075
29-0077
29-1110
29-1031
© 2012 Mobile Climate Control
Description
Qty
1
2
6
6
6
8
Grommet
Relay 24V
Receptacle
Retainer
Stud, Oval Slotted
Knurled Nut, ¼” x 20
27
T-357
Rev. 11/2014
1.15 MCC Heater Unit 12-70292
1
6
2
11
5
8
4
9
7
10
13
12
3
14
Item
1
2
3
N.S.
4
5
6
7
8
Part Number
15-19190
25-2848
22-0242
25-3384
26-0264
28-0331
28-0330
28-0005
28-0008
© 2012 Mobile Climate Control
Description
Qty
1
1
1
NSI
1
1
1
1
2
Blower Assembly 24V, Includes:
Al. Housed Resistor
Heater Coil Assembly
Wiring Harness
Air Filter
Hole Plug ½”
Hole Plug ⅜”
Grommet ⅝”
Grommet
28
T-357
Rev. 11/2014
1.15 Heater Unit 12-70292 (Parts List) Continued:
Item
9
10
11
12
13
14
Part Number
28-0045
25-0219
29-0075
29-0077
29-1110
29-1031
© 2012 Mobile Climate Control
Description
Qty
1
2
6
6
6
8
Grommet
Relay 24V
Receptacle
Retainer
Stud, Oval Slotted
Knurled Nut, ¼” x 20
29
T-357
Rev. 11/2014
1.16 MCC Heater Unit 12-70294
10
12
11
5
1
2
9
4
3
6
7
13
Item
1
2
3
N.S.
4
5
6
7
8
Part Number
15-19190
25-2848
22-0242
25-3384
26-0264
28-0331
28-0330
28-0005
28-0008
© 2012 Mobile Climate Control
8
14
Description
Qty
1
1
1
NSI
1
1
1
1
2
Blower Assembly 24V, Includes:
Al. Housed Resistor
Heater Coil Assembly
Wiring Harness
Air Filter
Hole Plug ½”
Hole Plug ⅜”
Grommet ⅝”
Grommet
30
T-357
Rev. 11/2014
1.16 Heater Unit 12-70294 (Parts List) Continued:
Item
9
10
11
12
13
14
Part Number
28-0045
25-0219
29-0075
29-0077
29-1110
29-1031
© 2012 Mobile Climate Control
Description
Qty
1
2
6
6
6
8
Grommet
Relay 24V
Receptacle
Retainer
Stud, Oval Slotted
Knurled Nut, ¼” x 20
31
T-357
Rev. 11/2014
1.17 MCC Heater Unit 12-7558
1,2
9
6
8
11
3
10
7
4
5
Item
1
2
3
4
5
6
7
8
9
10
11
Part Number
15-3020
25-2530
22-1089
25-3450
26-0259
46-0031
28-0029
28-0004
35-0604
23-0040
27-0183
© 2012 Mobile Climate Control
Description
Qty
1
1
1
NSI
1
1
4
1
1
1
1
Blower Assembly 24V, Includes:
Al. Housed Resistor
Heater Coil Assembly
Wiring Harness
Air Filter
Motorized Valve Assembly (Heater)
Bushing, 3/16” Dia. X 5/16” LG.
Grommet
Brushless Controller, 24VDC
Hose, Air, 4” (Length 25.6” (650 mm))
Gear Clamp, 4”
32
T-357
Rev. 11/2014
1.18 MCC Heater Unit 12-8340
11
4
1
8
10
7
2
3
5
6
Item
1
2
3
N.S.
4
5
6
7
Part Number
15-05038
22-1256
25-1124
25-3308
26-1452
28-0005
28-0008
28-0045
© 2012 Mobile Climate Control
9
Description
Qty
1
1
2
NSI
1
1
2
1
Blower Assembly 24V, Includes:
Heater Coil Assembly
Relay, 24V
Wiring Harness
Air Filter
Grommet ⅝”
Grommet
Grommet
33
T-357
Rev. 11/2014
1.18 Heater Unit 12-8340 Parts List Continued):
Item
8
9
10
11
Part Number
29-0075
29-1031
29-1110
35-0835
© 2012 Mobile Climate Control
Description
Qty
1
9
1
1
Receptacle
Knurled Nut ¼”
Stud Oval Slotted
Sensor, Temperature
34
T-357
Rev. 11/2014
1.19 MCC Heater Unit 12-8364
1
10
8
7
3
4
5
6
2
9
Item
1
2
3
N.S.
4
5
6
7
Part Number
15-05038
22-1256
25-1124
25-3406
26-1452
28-0005
28-0008
28-0045
© 2012 Mobile Climate Control
Description
Qty
1
1
2
NSI
1
1
2
1
Blower Assembly 24V, Includes:
Heater Coil Assembly
Relay, 24V
Wiring Harness
Air Filter
Grommet ⅝”
Grommet
Grommet
35
T-357
Rev. 11/2014
1.19 Heater Unit 12-8364 Parts List Continued):
Item
8
9
10
Part Number
29-0075
29-1031
29-1110
© 2012 Mobile Climate Control
Description
Qty
1
9
1
Receptacle
Knurled Nut ¼”
Stud Oval Slotted
36
T-357
Rev. 11/2014
© 2012 Mobile Climate Control
37
T-357 Rev. 11/2014
Figure 1-1 Schematic for Models 12-11632 & 12-11634
Schematic 12-11632S
&
Schematic 12-11634S
© 2012 Mobile Climate Control
38
T-357 Rev. 11/2014
Figure 1-2 Schematic for Models 12-60046
Schematic 12-60046S
© 2012 Mobile Climate Control
39
T-357 Rev. 11/2014
Figure 1-3 Schematic for Models 12-60056
O
O
Schematic 12-60056S
© 2012 Mobile Climate Control
40
T-357 Rev. 11/2014
Figure 1-4 Schematic for Models 12-60058
Schematic 12-60058S
© 2012 Mobile Climate Control
41
T-357 Rev. 11/2014
Figure 1-5 Schematic for Models 12-60060
Schematic 12-60060S
© 2012 Mobile Climate Control
42
T-357 Rev. 11/2014
Figure 1-6 Schematic for Models 12-60064
Schematic 12-60064S
© 2012 Mobile Climate Control
43
T-357 Rev. 11/2014
Figure 1-7 Schematic for Models 12-60070
Schematic 12-60070S
© 2012 Mobile Climate Control
44
T-357 Rev. 11/2014
Figure 1-8 Schematic for Models 12-70276
Schematic 12-70276S
© 2012 Mobile Climate Control
45
T-357 Rev. 11/2014
Figure 1-9 Schematic for Models 12-70278
Schematic 12-70278S
© 2012 Mobile Climate Control
46
T-357 Rev. 11/2014
Figure 1-10 Schematic for Models 12-70282 & 12-70284
Schematics 12-70282S & 12-70284S
© 2012 Mobile Climate Control
47
T-357 Rev. 11/2014
Figure 1-11 Schematic for Models 12-70286,12-70288, 12-70292 &12-70294
Schematics 12-70286S, 12-70288S, 12-70292S & 12-70294S
© 2012 Mobile Climate Control
48
T-357 Rev. 11/2014
:
Figure 1-12 Schematic for Models 12-7558
:
Schematic 12-7558S
© 2012 Mobile Climate Control
49
T-357 Rev. 11/2014
:
Figure 1-13 Schematic for Models 12-8340
:
:
Schematic 12-8340S
© 2012 Mobile Climate Control
50
T-357 Rev. 11/2014
:
Figure 1-14 Schematic for Models 12-8364
:
:
Schematic 12-8364S
INDEX
1
25-0219
16, 18, 25, 27, 29, 31
25-0232
25-0251
8
20, 22
25-0623
4
25-1124
25-1309
4, 6, 8, 10, 12, 14, 33, 35
9
25-2530
2, 3, 32
13430
2, 3
13431
2, 3
14524
2, 3
15-0484
2, 3
15-05038
33, 35
15-15064
10, 12
15-15078
6
25-2660
25-2841
9, 11, 13, 15
20, 22
15-15082
14
25-2848
8, 10, 16, 18, 24, 26, 28, 30
15-19176
8
25-3056
5
15-19190
16, 18, 24, 26, 28, 30
15-19196
20, 22
25-3191
25-3308
12, 14
33
15-1982
4
25-3343
16, 18
15-3020
32
16534
2, 3
25-3345
25-3347
2, 3
9
25-3363
20, 22
25-3384
25-3406
24, 26, 28, 30
35
25-3414
10
25-3450
32
25-3513
25-3554
12, 14
7
26-0259
32
26-0264
26-0265
20, 22, 24, 26, 28, 30
4, 6
26-0277
6
16, 18
33, 35
2
22-0226
4, 6
22-0242
18, 20, 26, 28, 30
22-0895
16, 22, 24
22-1089
32
22-1222
2, 3
22-1256
33, 35
22-1266
8
22-1329
10
22-1355
12, 14
23-0040
32
26-1292
26-1452
23-0611
8
26-1619
2, 3
23-0657
10
26-1714
4, 6
23-0707
12, 14
24-1257
4, 8
26-1843
27-0183
9
32
24-1258
4, 8
27-0238
7
24-3344
16
25-0006
17, 18
27-0910
27-0911
6
6, 9
25-0022
6, 8
27-2660
5
© 2012 Mobile Climate Control
I
T-357 Rev. 11/2014
INDEX
27-3176
9
28-0004
7, 9, 32
28-0005
29-0077
5, 7, 9, 17, 19, 21, 23, 25, 27,
29, 31
5, 7, 9, 16, 18, 20, 22, 24, 26,
28, 30, 33, 35
29-0120
5, 7
29-0124
9, 11, 13, 15, 17
28-0007
2, 3, 5, 11
29-0424
7, 9
28-0008
13, 15, 17, 18, 20, 22, 24, 26,
28, 30, 33, 35
29-0443
5, 9
29-0558
15
28-0011
15
29-1031
21, 23, 25, 27, 29, 31, 34, 36
28-0014
5, 22, 24, 26
29-1110
28-0029
5, 9, 32
12, 14, 17, 19, 21, 23, 25, 27,
29, 31, 34, 36
28-0045
5, 7, 11, 17, 19, 20, 23, 25,
27, 29, 31, 33, 35
28-0079
5, 7, 9
28-0293
4, 7, 9
28-0326
5, 7, 9, 11, 13, 15
28-0330
17, 19, 21, 28, 30
28-0331
16, 19, 21, 24, 26, 28, 30
28-0335
17
28-0404
2, 3
29-0075
5, 7, 9, 10, 12, 14, 17, 19, 21,
23, 25, 27, 29, 31, 34, 36
46-0025
11
46-0031
32
29-0076
9, 10
46-0047
13, 15
© 2012 Mobile Climate Control
3
35-0437
5
35-0604
32
35-0835
17, 34
37-0035
9
4
II
T-357 Rev. 11/2014
Every driver deserves the best possible
vehicle climate with MCC products
MCC provides exceptional performance in mobile climate comfort.
www.mcc-hvac.com
Member of MCC Group S Certified ISO 9001 and ISO 1 4001.
Specifications subject to change without notice. MCC is a registered trademark.
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York PA 17406 USA
Tel: 1--800--673--2431
Fax: 1--717--764--0401
© 2012 Mobile Climate Control
T-357 Rev. 11/2014