1955-56 chevrolet

906156 REV F 07/23/14 INST 1955-56 CHEVY 4-VENT PLENUM PG 1 OF 26

1955-56 CHEVROLET GEN IV w/ FOUR LEVER CONTROLS & 4 VENT PLENUM

56156-PCZ

an ISO 9001: 2008 Registered Company


PAGES

1. COVER 2. TABLE OF CONTENTS 3. PACKING LIST 4. INFORMATION PAGE 5. WIRING NOTICE 6. ENGINE & PASSENGER COMPARTMENT FIGURES 1 & 2 7. CONDENSER ASSEMBLY & CORE SUPPORT FIGURES 3, 3a & 3b 8. COMPRESSOR & BRACKETS, & DEFROST DUCT INSTALLATION FIGURES 4, 5 & 5a 9. EVAPORATOR INSTALLATION FIGURES 6 & 6a10. EVAPORATOR INSTALLATION FIGURES 6b & 711. CENTER VENT INSTALLATION, PASSENGER AND DRIVER SIDE UNDER LOUVER INSTALLATION & DRAIN HOSE INSTALLATION FIGURES 7a, 8 & 912. O-RING LUBRACTING/FITTING TIGHTENING & HEATER CONTROL VALVE INSTALLATION FIGURES 10, 11 & 1213. HARDLINE & HOSE INSTALLATION & HEATER CONTROL VALVE INSTALLATION14. A/C HOSE ROUTING FIGURES 13 & 13b15. FIREWALL COVER INSTALLATION FIGURE 1416. FINAL STEPS DUCT HOSE ROUTING & CONTROL HARNESS INSTALLATION FIGURE 1517. GLOVE BOX INSTALLATION FIGURE 1618. EVAPORATOR HARDLINE INSTALLATION FIGURE 1719. WIRING DIAGRAM20. GEN IV WIRING CONNECTION INSTRUCTIONS21. OPERATION OF CONTROLS22. TROUBLESHOOTING23. TROUBLESHOOTING CONT.24. THERMOSTAT ADJUSTMENT25. CORE SUPPORT TEMPLATE26. EVAPORATOR KIT PACKING LIST

Table of Contents


** BEFORE BEGINNING INSTALLATION, OPEN ALL PACKAGES AND CHECK CONTENTS OF SHIPMENT. PLEASE REPORT ANY SHORTAGES DIRECTLY TO VINTAGE AIR WITHIN 15 DAYS. AFTER 15 DAYS, VINTAGE AIR WILL NOT BE RESPONSIBLE FOR MISSING OR DAMAGED ITEMS.

EVAPORATOR KIT 56156-PCZ

EVAPORATOR KIT PACKING LIST

No. QTY. PART No. DESCRIPTION

1.2.

11

760156-VCE78256-PCN

1955-56 CHEVROLET EVAP. SUB CASE 4-VENT PLENUM1955-56 CHEVROLET CAR wo A/C VENT PLENUM ACC. KIT

1

ACCESSORY KIT78256-PCN NOTE: IMAGES MAY NOT DEPICT ACTUAL PARTS AND QUANTITIES.

REFER TO PACKING LIST FOR ACTUAL PARTS AND QUANTITIES.

2

1955-56 CHEVROLET EVAP. SUB CASE

760156-VCE


Use of Any Other Refrigerants Will Void All Warranties of the Air Conditioning System and Components. Use of the Proper Type and

Amount of Refrigerant Is Critical to Proper System Operation. VintageAir Recommends Our Systems Be Charged By Weight With a Quality

Charging Station or Scale.

Service Info:

Safety Switches:

Important Notice—Please Read

Attention: The following system components are capped: Compressor, evaporator, condenser & drier. Caps may be under pressure with dry nitrogen. Be careful removing caps. Do not remove caps prior to installation. Removing caps prior to installation will cause components to collect moisture and lead to premature failure and reduced performance.

Evacuate the system for 35-45 minutes with system components (Drier, compressor, evaporator and condenser) at a temperature of at least 85° F. On a cool day, the components can be heated with a heat gun OR by running the engine with the heater on before evacuating. Leak check and charge to specifications.

For Maximum System Performance, Vintage Air Recommends the Following:

Heater hose may be purchased from Vintage Air (Part# 31800-VUD) or your local parts retailer. Routing and required length will vary based on installer preference.

Vintage Air Systems Are Designed to Operate With R134a Refrigerant Only! Use of Any Other Refrigerants Is a Fire Hazard and Could Damage Either Your Air Conditioning System or Your Vehicle.

Refrigerant Capacity for Vintage Air Systems:(For other systems, consult manufacturer’s guidelines)

R134a SystemCharge with 1.8 lbs. (1 lb., 12 oz.) of refrigerant.

Lubricant Capacities:New Vintage Air-supplied Sanden Compressor: No additional oil needed (Compressor is shipped with proper oil charge).All Other Compressors: Consult manufacturer (Some compressors are shipped dry and will need oil added).

Your Vintage Air system is equipped with a binary pressure safety switch. A binary switch disengages the compressor clutch in cases of extreme low pressure conditions (Refrigerant Loss) or excessively high head pressure (406 PSI) to prevent compressor damage or hose rupture. A trinary switch combines Hi/Lo pressure protection with an electric fan operation signal at 254 PSI, and should be substituted for use with electric fans. Compressor safety switches are extremely important since an A/C system relies on refrigerant to circulate lubricant.

Heater Hose (Not Included With This Kit):

To ensure a watertight seal between the passenger compartment and the vehicle exterior, for all bolts passing through the cowl and/or firewall, Vintage Air recommends coating the threads with silicone prior to installation.

Bolts Passing Through Cowl and/or Firewall:


Important Wiring Notice—Please Read

Some Vehicles May Have Had Some or All of Their Radio Interference Capacitors Removed. There Should Be a Capacitor Found At Each of the Following Locations:

1. On the positive terminal of the ignition coil.2. If there is a generator, on the armature terminal of the generator.3. If there is a generator, on the battery terminal of the voltage regulator.

Most alternators have a capacitor installed internally to eliminate what is called “whining” as the engine is revved. If whining is heard in the radio, or just to be extra cautious, a radio interference capacitor can be added to the battery terminal of the alternator.

It is also important that the battery lead is in good shape and that the ground leads are not compromised. There should be a heavy ground from the battery to the engine block, and additional grounds to the body and chassis.

If these precautions are not observed, it is possible for voltage spikes to be present on the battery leads. These spikes come from ignition systems, charging systems, and from switching some of the vehicle’s other systems on and off. Modern computer-operated equipment can be sensitive to voltage spikes on the power leads, which can cause unexpected resets, strange behavior, and/or permanent damage.

Vintage Air strives to harden our products against these types of electrical noise, but there is a point where a vehicle’s electrical system can be degraded so much that nothing can help.

Radio interference capacitors should be available at most auto and truck parts suppliers. They typically are cylindrical in shape, a little over an inch long, a little over a half inch in diameter, and they have a single lead coming from one end of the cylinder with a terminal on the end of the wire, as well as a mounting clip which is screwed into a good ground on the vehicle. The specific value of the capacitance is not too significant in comparison to ignition capacitors that are matched with the coil to reduce pitting of the points.

Care must be taken, when installing the compressor lead, not to short it to ground. The compressor lead must not be connected to a condenser fan or to any other auxiliary device. Shorting to ground or connecting to a condenser fan or any other auxiliary device may damage wiring, the compressor relay, and/or cause a malfunction.

When installing ground leads on Gen IV systems, the blower control ground and ECU ground must be connected directly to the negative battery post.

For proper system operation, the heater control valve must be connected to the ECU.

•

•

•


INSTALLATION INSTRUCTIONS FOR1955-1956 CHEVROLET

ENGINE COMPARTMENTDISCONNECT BATTERY AND REMOVE.REMOVE BATTERY TRAY.REMOVE AIR CLEANER.DRAIN RADIATOR.DISCONNECT HEATER HOSES.

REMOVE OEM HEATER ASSEMBLY, INCLUDES: CONTROL CABLES, (2) 7/16” NUTS ON FIREWALL AND ONE UNDER DASH (DISCARD).REMOVE HEATER BLOWER (DISCARD). SEE FIGURE 1, BELOW.REMOVE DUCT ABOVE KICK PANEL VENT WITH BUTTERFLY AND PANEL FLANGE (DISCARD). INSTALL NEW VENT COVER AS SHOWN IN FIGURE 2.REMOVE GLOVE BOX DOOR (RETAIN).REMOVE GLOVE BOX (DISCARD).REMOVE THE ORIGINAL DEFROSTER DUCT FROM HEATER TO WINDSHIELD (DISCARD).REMOVE ASH TRAY (RETAIN).REMOVE ASH TRAY SLIDER ASSEMBLY (RETAIN).REMOVE VENT & CABLE FROM DASH (RETAIN). SEE FIGURE 1, BELOW.REMOVE CONTROL PANEL (RETAIN). REFER TO CONTROL PANEL CONVERSION KIT TO ASSEMBLE CONTROL PANEL.REMOVE PASSENGER SIDE SPEAKER GRILLE (RETAIN). SEE FIGURE 1, BELOW.

BEFORE STARTING THE AIR CONDITIONER INSTALLATION, CHECK FOR PROPER OPERATION OF ALL COMPONENTS (RADIO, LIGHTS, WIPERS, ETC.). STUDY THE INSTRUCTIONS,

ILLUSTRATIONS AND DIAGRAMS. FOR EASE OF INSTALLATION,CHECK OFF ( ) EACH PROCEDURE PRIOR TO MOVING ON TO THE NEXT STEP.

PASSENGER COMPARTMENT

OEMSCREWS

6

9 2

1

7

5

8

4

3

11

10

FIGURE 1

FIGURE 2


LOOSEN THE (6) BOLTS THAT SECURE THE RADIATOR TO THE CORE SUPPORT. SLIDE THE CONDENSER ASSEMBLY INTO POSITION. THE CONDENSER BRACKETS WILL BE HELDBETWEEN THE RADIATOR AND CORE SUPPORT, SECURED WITH THE (6) RADIATOR BOLTS. SEE FIGURES 3 & 3b, BELOW. HOLDING THE CONDENSER IN POSITION, TIGHTEN THE (6) RADIATOR BOLTS.

LOCATE THE TEMPLATE ON PAGE 23, AND ALIGN THIS TEMPLATE ON THE PASSENGER SIDE CORE SUPPORT PANEL. USING THE TEMPLATE, MARK HOLES AND CUT THE 1 ¼” HOLE, USING A HOLE SAW. DRILL THE 5/16” HOLE IN NOTED LOCATION. SEE FIGURE 3a, BELOW.

INSTALL THE #6 AND # 8 CONDENSER LINES THROUGH THE 1 ¼” HOLE. LUBRICATE O-RINGS(SEE FIGURES 10 & 11, PAGE 12) AND CONNECT LINES TO CONDENSER. LOCATE THE SPLIT GROMMET AND INSTALL AS SHOWN IN FIGURE 3b, BELOW.

INSTALL DRIER LOOSELY AS SHOWN IN FIGURE 3b, BELOW.NOTE: REFRIGERANT FLOW FOLLOWS ARROW ONDRIER.

OEM RADIATOR

VINTAGE AIRCONDENSER

SIDE OF CORESUPPORT

HOLE INCORE SUPPORT

1 ¼”

5/16”

DRIER

5/16”BOLTS

1/4” x 1” BOLT(18290-VUB)

MOUNT DRIERTO INSIDE OF CORE SUPPORT

THRU 5/16” HOLE

SPLITGROMMET

#6 COND. LINE35017-VCG

1/4” NUT(18136-VUB)

w/ FLAT WASHER(18125-VUB)


INSTALL (8) #6 x 3/8”PAN HEAD SCREWS

NOTE: #8 (LARGER)FITTING AT TOP OF

RADIATOR

CONDENSER ASSEMBLY

CORE SUPPORT

INSTALLATION OF CONDENSER HARDLINES

FIGURE 3b

FIGURE 3a

FIGURE 3


REFER TO SEPARATE INSTRUCTIONS INCLUDED WITH THE BRACKET KIT TO INSTALL THE COMPRESSOR BRACKET. REFER TO FIGURE 4, BELOW, FOR COMPRESSOR MOUNTING POSITION.

IN MOST INSTANCES, EXISTING BELT LENGTHS WILL REMAIN THE SAME. SEE FIGURE 4, BELOW.

INSTALL DEFROST DUCTS WITH 2” DUCT HOSE (PASSENGER SIDE) 2” x 10” (DRIVER SIDE) 2” x 24”.SEE FIGURE 5, BELOW, & FIGURE 15, PAGE 16.

INSTALL THE DEFROSTER DUCTS AT THIS TIME. SEE FIGURE 5 & 5a.NOTE: ROUNDED SIDE OF DUCTS FACE PASSENGER AREA.

LOCATE THE CONTROL PANEL CONVERSION KIT (473055-PCA), REFER TO INSTRUCTIONS SUPPLIEDWITH CONVERSION KIT TO ASSEMBLE CONTROL PANEL.

GENERATOROR ALTERNATOR

COMPRESSOR

TAB“E”

TAB“G”

TAB“C”

TAB“A”

WATER PUMPPULLEYMOUNT THE

COMPRESSORUSING TABS“G” & “C”

NOTE: BELT ROUTING MAY VARYWITH DIFFERENT BRACKET SETS.ALWAYS REFER TO INSTRUCTIONSINCLUDED WITH BRACKETS.

22503-VCA

22506-VCA

22507-VCA

CRANKSHAFTPULLEY

DEFROST HOLE

SEAT THE BRACKETIN DEFROSTER HOLE

DEFROST DUCT(ROUNDED SIDE OUT)

#8 x 1/2” PH PANHEAD SCREW

FOR 1955 MODELUSING EXISTING

HOLES

#8 x 1/2” PH PANHEAD SCREW

FOR 1956 MODELUSING EXISTING

HOLES

WATER PUMP PULLEY(DOUBLE GROOVE)

CRANKSHAFT PULLEY(TRIPLE GROOVE)

CRANKSHAFT PULLEY(DOUBLE GROOVE)

(WITH POWER STEERING,A 3-GROOVE CRANKPULLEY IS REQUIRED)

PULLEYS (VINTAGE AIR) SHORT PUMPSMALL BLOCK CHEVY (STEEL PULLEY)

COMPRESSOR & BRACKETS

PULLEYS

DEFROST DUCT INSTALLATION

CONTROL PANEL CONVERSION

FIGURE 4

FIGURE 5

FIGURE 5a


ON A WORKBENCH, INSTALL EVAPORATOR REAR BRACKETS, AND INSTALL EVAPORATOR HARDLINES WITHPROPERPLY LUBRICATED O-RINGS (SEE FIGURE 17, PAGE 18, AND FIGURES 10, 11 & 12, PAGE 12).

LIFT EVAPORATOR UNIT UP & UNDER THE DASHBOARD (SEE FIGURES 6-6a, BELOW, & FIGURE 6b, PAGE 10).SECURE LOOSELY TO THE FIREWALL FROM THE ENGINE COMPARTMENT SIDE WITH (2) 1/4-20 x 1” BOLTSAND WASHERS. SEE FIGURE 7, PAGE 10, & FIGURE 17, PAGE 18.

INSTALL FRONT MOUNTING BRACKET TO EVAPORATOR UNIT WITH 1/4-20 x 1/2” BUTTON HEAD BOLT, ANDTIGHTEN AS SHOWN IN FIGURE 7, PAGE 10. LOOSELY ATTACH FRONT MOUNTING BRACKET TO DASH WITH1/4-20 x 1” BOLT, WASHER AND NUT. SEE FIGURE 7, PAGE 10.

INSTALL 4-VENT PLENUM TO EVAPORATOR WITH (2) 10-32 x 1/2” SCREWS. SEE FIGURE 7, PAGE 10.

VERIFY THAT EVAPORATOR UNIT IS LEVEL AND SQUARE TO THE DASH, THEN TIGHTEN ALL MOUNTING BOLTS.NOTE: TIGHTEN THE (2) BOLTS ON FIREWALL FIRST, THEN THE FRONT MOUNTING BRACKET BOLT ANDNUT. TIGHTEN THE CENTER PLENUM MOUNTING BOLT LAST.

EVAPORATOR INSTALLATION

INSTALL EVAPORATOR UNIT FROMPASSENGER SIDE FLOOR BOARD.

ROTATE EVAPORATOR UNIT SO LINES PASS THROUGHOPENING IN FIREWALL, AND LIFT INTO PLACE.

FIGURE 6

FIGURE 6a


FIGURE 6b

FIREWALL

DEFROSTDOOR

DASH/FLOORDOOR

A/C-HEATBLENDDOOR

ECUMODULE

1/4-20NUT

1/4-20 x 1/2”BUTTON HEAD

SCREW

1/4-20 x 1”BOLT & WASHER


4-VENTA/C PLENUM

4-VENTA/C PLENUM

10-32 x 1/2”SCREW

BOTTOM LIP OF DASH

TO EVAP.TO

DASH

FRONTMOUNTING

BRACKET

ONCE INTO PLACE SECURE EVAPORATORUNIT TO FIREWALL.

FIGURE 7


CENTER VENT INSTALLATIONPLACE CENTER VENT UNDER DASH IN DESIRED POSITION. SEE FIGURE 7a, BELOW. DRILL (2) 1/8”MOUNTING HOLES IN BOTTOM LIP OF DASH, AND SECURE CENTER VENT TO DASH USING(2) #8 x 1/2” PAN HEAD SCREWS. SEE FIGURE 7a, BELOW.

INSTALL PASSENGER AND DRIVER SIDE BALLLOUVERS AS SHOWN IN FIGURE 8.SLIDE LOUVER UP TOWARDS BOTTOM OF DASHUNTIL THE LOUVER IS SEATED AGAINST DASH, ANDSECURE TO KICK PANEL WITH SUPPLIED(2) #8 x 1/2” PAN HEAD SCREWS. SEE FIGURE 8.

IN LINE WITH THE DRAIN, LIGHTLY MAKE AMARK ON THE FIREWALL. MEASURE ONEINCH DOWN AND DRILL A 5/8” HOLETHROUGH THE FIREWALL. SEE FIGURE 9.FIGURE 14 ON PAGE 15 WILL SHOW YOUROUGHLY THE HOLE LOCATION.INSTALL DRAIN HOSE TO BOTTOM OFEVAPORATOR UNIT AND ROUTE THROUGHFIREWALL. SEE FIGURE 9, RIGHT, AND FIGURE14, PAGE 15.

CENTER VENT(2) #8 x 1/2” PAN HEAD

SCREWS

(2) #8 x 1/2”PAN HEADSCREWS

DRAINHOSE

DRAIN1”

PASSENGER AND DRIVER SIDE UNDER DASH LOUVER INSTALLATION

DRAIN HOSE INSTALLATION

FIGURE 7a

FIGURE 8

FIGURE 9


HEATER CONTROL VALVE INSTALLATION

TWIST WITHTHIS

WRENCH

HOLD WITHTHIS WRENCH

ECUMODULE

#10 SUCTIONHOSE

HEATERHOSE

TO WATER PUMP

#6 LIQUIDLINE

O-RING MALEINSERT

FEMALENUT

O-RING,SLIDE OVERMALE INSERT TOSWAGED LIP

SUPPLIED OILFOR O-RINGS

#6 O-RING

FOR A PROPER SEALOF FITTINGS:INSTALL SUPPLIEDO-RINGS AS SHOWNAND LUBRICATE WITHSUPPLIED OIL.

#8 O-RING #10 O-RING

LUBRICATEO-RING

(SEE FIGURE 11)FIGURE 10

FIGURE 11

FIGURE 12

NOTE: FLOW DIRECTION FOLLOWSMOLDED ARROW ON VALVE.

FROM INTAKEMANIFOLD


INSTALL FIREWALL COVER. SEE FIGURE 14, PAGE 15.

INSTALL THE #6 LIQUID LINE, LUBRICATE (1) #6 O-RING AND TIGHTEN.

SEE FIGURE 13b, PAGE 14.

INSTALL HEATER HOSES TO HEATER LINES AND ROUTE AS SHOWN IN FIGURE 13-13b, PAGE 14. SECURE WITH

REFER TO SEPARATE INSTRUCTIONS INCLUDED WITH MODIFIED HOSE KIT.

HOSE CLAMPS. NOTE: THIS KIT DOES NOT CONTAIN HEATER HOSE. YOU MUST PURCHASE 5/8” DIAMETER HEATER HOSE FROM YOUR LOCAL PARTS RETAILER.

INSTALL HEATER CONTROL VALVE IN LINE WITH INTAKE MANIFOLD (PRESSURE SIDE) HEATER HOSE. SEE FIGURE 12, PAGE 12.

INSTALL THE #6 LIQUID LINE TO DRIER WITH LUBRICATED O-RING AND TIGHTEN. SEE FIGURE 13, PAGE 14

SECURE THE #6 LIQUID LINE TO THE FENDER USING THE SUPPLIED ADEL CLAMP. SEE FIGURE 13, PAGE 14.

INSTALL BINARY SWITCH ON #6 LIQUID LINE. SEE FIGURE 13, PAGE 14.

LOCATE THE TWO COMPRESSOR ALUMINUM HARDLINE EXTENSIONS. SEE FIGURE 13, PAGE 14.

LOCATE THE #8 COMPRESSOR ALUMINUM HARDLINE. LUBRICATE (1) #8 O-RING AND INSTALL ON THE FEMALE O-RING END. CONNECT THIS LINE TO THE #8 DISCHARGE PORT ON THE COMPRESSOR AND TIGHTEN. SEE FIGURES 10 & 11, PAGE 12. LOCATE THE #10 COMPRESSOR ALUMINUM HARDLINE. LUBRICATE (1) #10 O-RING AND INSTALL ON THE FEMALE O-RING END. CONNECT THIS LINE TO THE #10 SUCTION PORT ON THE COMPRESSOR AND TIGHTEN. SEE FIGURE 13, PAGE 14.

SECURE THE TWO COMPRESSOR HARDLINES TO THE COMPRESSOR, USING THE SUPPLIED CLAMP. SEE FIGURE 13a, PAGE 14.

LOCATE THE #8 RUBBER HOSE. THIS HOSE WILL CONNECT TO THE #8 ALUMINUM COMPRESSOR HARDLINE AND #8 ALUMINUM HARDLINE FROM CONDENSER. LUBRICATE (2) #8 O-RINGS, AND INSTALL ONE ON EACH END OF THE #8 RUBBER HOSE. ROUTE HOSE AS SHOWN IN FIGURE 13, PAGE 14, AND TIGHTEN. NOTE: THE 90° HOSE END CONNECTS TO THE CONDENSER HARDLINE.

LOCATE THE #10 RUBBER HOSE. THIS HOSE WILL CONNECT TO THE #10 ALUMINUM COMPRESSOR HARDLINE AND #10 ALUMINUM HARDLINE FROM EVAPORATOR. LUBRICATE (2) #10 O-RINGS AND INSTALL ONE ON EACH END OF THE #10 RUBBER HOSE. ROUTE HOSE AS SHOWN IN FIGURE 13, PAGE 14, AND TIGHTEN. NOTE: THE 90° HOSE END CONNECTS TO THE COMPRESSOR HARDLINE.

HARDLINE & HOSE INSTALLATION

STANDARD HOSE KIT

HEATER CONTROL VALVE & #6 LIQUID LINE

MODIFIED HOSE KIT


A/C HEATER HOSE& LINE ROUTING

FIREWALLCOVER

BINARY SWITCHINSTALLATION

#8 RUBBERHOSE

ADELCLAMP

BINARYSWITCH

#6 HARDLINE35017-VCG


SPLIT RUBBERGROMMET IN HOLEIN CORE SUPPORT

ALUMINUMCLAMP

(STANDARDHOSE KIT

ONLY)

#6 LIQUID LINE FROMDRIER TO

EXPANSION VALVE (09154-PFL)

#6 LIQUID LINE

#10 RUBBERSUCTION HOSE

EXPANSIONVALVE

ECUMODULE

ECUMODULE

FIREWALLCOVER

#10 SUCTIONHOSE

#6 LIQUIDLINEHEATER

HOSE

O-RING

#10 SUCTIONLINE (INSULATED)

NOTE: MODIFIED HOSE KITS INCLUDE(2) 135° COMPRESSOR FITTINGS.(REFER TO MODIFIED HOSE KITINSTRUCTIONS INCLUDED WITH HOSE KIT.)

EVAPORATORSUB CASE

HEATERHOSES

#8 COMPRESSORALUMINUM HARDLINEEXT. (DISCHARGE SIDE)

35038-VUG-A

#10 COMPRESSORALUMINUM HARDLINEEXT. (SUCTION SIDE)

35037-VUG-A

NOTE: COMPRESSOR HARDLINESARE INCLUDED WITH STANDARD

HOSE KIT ONLY.

HEATERCONTROL

VALVE

PRESSTAPE

FIGURE 13

FIGURE 13a

FIGURE 13b


FIREWALL COVER

DRAINHOLE

7/16” PANELRETAINER



DRIVER SIDEEVAP. BRKT.

MOUNTING HOLE

PASS. SIDE EVAP.MOUNTING HOLE

PASS LINES THROUGH FIREWALL COVER, AND SECURE WITH (2) 7/16” PANEL RETAINERS. SEEFIGURE 14, BELOW.

FIGURE 14


FINAL STEPS-DUCT HOSE ROUTING & CONTROL PANEL HARNESS

PLUGFROM

WIRINGHARNESS

232001-VUR

PLUGFROM

CONTROLWIRING

HARNESS232002-VUA

ECUMODULE

PASSENGERSIDE LOUVER2 ½” x 42”

DRIVER SIDELOUVER

2 ½” x 48”

DRIVER SIDECENTER VENT

2 ½” x 15”

DRIVER SIDEDEFROST DUCT

2” x 24”

PASSENGER SIDEDEFROST DUCT

2” x 10”

PASSENGER SIDECENTER VENT

2 ½” x 12”

INSTALL DUCT HOSES AS SHOWN IN FIGURE 15, BELOW.PLUG THE CONTROL PANEL HARNESS INTO THE ECU MODULE ON SUB CASE AS SHOWN. SEE FIGURE 15,BELOW.PLUG THE WIRING HARNESS INTO THE ECU MODULE ON SUB CASE AS SHOWN (WIRE ACCORDING TOWIRING DIAGRAM ON PAGE 19).

FIGURE 15


FIGURE 16

DASH

PLASTIC GLOVEBOX BOTTOM

(3) OEM SCREWS

(2) OEM SCREWS

GLOVEBOX HINGE

GLOVEBOX TOP

(3) #6 x 3/8”PAN HEADSCREWS

GLOVEBOX DOOR

INSTALL GLOVE BOX BOTTOM AND GLOVE BOX DOOR, SECURE TO DASH WITH (3) OEM SCREWS. SEEFIGURE 16, BELOW.

WITH GLOVE BOX BOTTOM AND DOOR IN PLACE, INSTALL GLOVE BOX TOP AS SHOWN, USING(3) #6 x 3/8” PAN HEAD SCREWS. ATTACH THE GLOVE BOX TOP TO THE GLOVE BOX BOTTOM AS SHOWN.

SECURE THE GLOVE BOX TOP TO DASH USING (2) OEM SCREWS. SEE FIGURE 16, BELOW.

REINSTALL ALL PREVIOUSLY REMOVED ITEMS (BATTERY BOX & BATTERY).

FILL RADIATOR WITH AT LEAST A 50/50 MIXTURE OF APPROVED ANTIFREEZE AND DISTILLED WATER.IT IS THE OWNER’S RESPONSIBILITY TO KEEP THE FREEZE PROTECTION AT THE PROPER LEVEL FORTHE CLIMATE IN WHICH THE VEHICLE IS OPERATED. FAILURE TO FOLLOW ANTIFREEZE RECOMMENDATIONSWILL CAUSE HEATER CORE TO CORRODE PREMATURELY AND POSSIBLY BURST IN A/C MODE AND/ORFREEZING WEATHER, VOIDING YOUR WARRANTY.

DOUBLE CHECK ALL FITTINGS, BRACKETS AND BELTS FOR TIGHTNESS.

VINTAGE AIR RECOMMENDS THAT ALL A/C SYSTEMS BE SERVICED BY A CERTIFIED AUTOMOTIVE AIRCONDITIONING TECHNICIAN.

EVACUATE THE SYSTEM FOR A MINIMUM OF 45 MINUTES PRIOR TO CHARGING, AND LEAK CHECKPRIOR TO SERVICING.

CHARGE THE SYSTEM TO THE CAPACITIES STATED ON THE INFORMATION PAGE (PAGE 4) OF THISINSTRUCTION MANUAL.


ECU

MO

DU

LE

DRI

VER

SID

E(E

VA

P. B

RKT)

64354-P

CB

1/4

-20 x

1/2

”BO

LT(L

OC

ATE

D O

NSU

B C

ASE

)

1/4

-20 x

1/2

”BO

LT(L

OC

ATE

D O

NSU

B C

ASE

)

HEA

TER

LIN

E(E

VA

P TO

INTA

KE)

09

15

2-P

CH H

EATE

R LI

NE

(EV

AP

TO W

ATE

R PU

MP)

09

15

3-P

CH

#6

LIQ

UID

LIN

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91

50

-PC

L)

TWIS

T W

ITH

THIS

WRE

NC

H

LUBR

ICA

TE O

-RIN

G(S

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RES

10 &

11,

PAG

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HO

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ITH

THIS

WRE

NC

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PASS

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(EV

AP.

BRK

T)6

43

55

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B

#10 O

-RIN

G(3

3859

-VU

F)

#10 S

UC

TIO

NLI

NE

(09151-P

CS)

#6

O-R

ING

(33

85

7-V

UF)

#10 O

-RIN

G(3

3859-V

UF)

PRES

S TA

PE

NO

TE:

AFT

ER I

NST

ALL

ING

#10 S

UC

TIO

N L

INE,

WR

AP

ALL

EX

PO

SED

MET

AL

(FIT

TIN

GS

& T

UB

E)W

ITH

SU

PP

LIED

PR

ESS

TAP

E.

EVA

PO

RA

TOR

HA

RD

LIN

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STA

LLA

TIO

N

FIG

UR

E 17


WHT/GRN

WHT/YELWHT/RED

RED

WHTBACKLIGHT NEG

FAN WIPER

MODE WIPER

TEMP WIPER

5V-SW

GND

BACKLIGHT POS

AC ANNUNCIATOR

PRE-WIRED

GEN IV WIRING DIAGRAMREV D, 5/6/2014

GEN IV ECU

PROGRAM

Wiring Diagram

TEMP

MODE

FAN

A/C(IF USED)

232007-VUR

232002-VUA

** CIRCUITBREAKER30 AMP

*** WIDE OPENTHROTTLESWITCH

(OPTIONAL)

* DASH LAMP(IF USED)

Dash Lamp Is Used Only With Type 232007-VUR Harness.Warning: Always Mount Circuit Breaker As Close to the Battery As Possible. (NOTE: Wire BetweenBattery and Circuit Breaker Is Unprotected and Should Be Carefully Routed to Avoid a ShortCircuit).Wide Open Throttle Switch Contacts Close Only at Full Throttle, Which Disables A/C Compressor.

JF8

BLK

ORA

TAN

VIEWED FROM WIRE SIDE

••

•

HEATERCONTROL VALVE


RED

CIRCUIT BREAKER30 AMP

+

+

-

BLACK

REDWHITE

RED

CHASSIS GROUND

A/CCOMPRESSOR

RELAY

Ignition Switch:

Dash Light:

NOTE: MOUNT RELAYIN DESIRED LOCATION

UNDER DASH

GREEN

FIREWALL

BLUE

BLUE

RED &

WHITE

VIOLET

(IGNITION HOTTERMINAL)

IGNITION SWITCH

DASH BACK LIGHT+0-12vTAN

GRAY

BLUE

WHITE

WHITE

REDRED

WHITE

COMPRESSOR

BATTERY

NOTE: CONNECT WHITEWIRES DIRECTLY TO

(-) BATTERY TERMINAL

BATRUN

12V

RED GREEN

RED

RED

BLUE

LATCH

BLACK

BINARYSAFETYSWITCH

YELLOW

ORANGE

WIRING HARNESS

Violet 12V Ign Switch Source (Key On Accessory) Position Must Be Switched.

Tan Wire Used Only With Vintage Air Supplied Control Panel With LED Back Light.

Binary: Connect As Shown (Typical Compressor Wiring). Be Sure Compressor Body Is Grounded.

Trinary Switch: Connect According To Trinary Switch Wiring Diagram.

Install With Servo Motor Facing Down, As Shown. Note Flow Direction Arrow Molded Into Valve Body, And Install Accordingly.

White Must Run To (-) Battery. Red May Run To (+) Battery Or Starter. Mount Circuit Breaker As Close to Battery As Possible.

Heater Control Valve:

Binary/Trinary & Compressor:

Circuit Breaker/Battery:

CONTROL WIRING HARNESS

NOTE: YELLOW & ORANGE

COMING FROM HARNESS ARE NOT

USED.

WIRING HARNESS

GRAY WIRE IS USED FOR PROGRAMING CONTROLS

IF APPLICABLE

WIRING HARNESS

Gen IV Wiring Connection Instruction

HEATERCONTROL VALVE

WARNING: ALWAYS MOUNT CIRCUIT BREAKER

AS CLOSE TO THE BATTERY AS POSSIBLE. (NOTE: WIRE BETWEEN BATTERY AND CIRCUIT BREAKER IS UNPROTECTED

AND SHOULD BE CAREFULLY ROUTED TO AVOID A SHORT CIRCUIT).

NOTE: HEATER CONTROL VALVE CONNECTION AND CHASSIS GROUND MAY BE LOCATED ON EITHER SIDE OF THE FIREWALL. ENSURECONNECTOR IS LATCHED

FIRMLY.


OPERATION OF CONTROLS

NOTE: CONTROLS MUST BE CALIBRATED FOR PROPER OPERATION-REFER TO CONTROL PANEL INSTRUCTIONS.

A/C MODEBLOWER SPEED

ADJUST TO DESIREDSPEED

COLD LEVERIN A/C MODE SLIDE

THE COLD LEVER ALL THE WAY UP TO

ENGAGE COMPRESSOR.(SLIDE LEVER UP OR DOWN TO ADJUST

DESIRED TEMPERATURE)HEAT LEVER

SLIDE THE HEAT LEVER ALL THE WAY UP FOR

MAX COLD. (SLIDE LEVER UP OR DOWN TO ADJUST DESIRED TEMPERATURE)

MODELEVER

COLDLEVER

BLOWERSPEED

HEATLEVER

HEAT MODE

DASH FLOOR DEF

OFF FAN HI

HEAT

COLD

DASH FLOOR DEF

OFF FAN HI

HEAT

COLD

DEFROST MODE

DASH FLOOR DEF

OFF FAN HI

HEAT

COLD

SLIDE THE LEVER TOTHE “DASH” POSITION

MODE LEVER

BLOWER SPEEDADJUST TO DESIRED

SPEED

COLD LEVERSLIDE THE COLD LEVER ALL THE WAY DOWN.

HEAT LEVERSLIDE THE HEAT LEVER ALL THE WAY DOWN

FOR MAX HEAT(SLIDE LEVER UP OR DOWN TO ADJUST

DESIRED TEMPERATURE)

COLD LEVERSLIDE COLD LEVER ALL THE

WAY UP TO THE COLD POSITION, TO ENGAGE

COMPRESSOR.

SLIDE HEAT LEVER ALL THE WAY UP. (SLIDE LEVER UP

OR DOWN TO ADJUSTDESIRED TEMPERATURE

HEAT LEVER

SLIDE THE LEVER TOTHE “FLOOR” POSITION

MODE LEVER

ADJUST TO DESIREDSPEED

BLOWER SPEED

SLIDE THE LEVER TOTHE “DEF” POSITION

MODE LEVER


Sym

pto

m

C

on

dit

ion

Ch

eck

s

Act

ion

s

N

ote

s

Blo

wer

sta

ys o

n

hig

h s

pee

d w

hen

ig

nitio

n is

on.

1a.

No o

ther

funct

ions

work

.

Chec

k fo

r dam

aged

pin

s or

wires

in c

ontr

ol hea

d p

lug.

Ver

ify

that

all

pin

s ar

e in

sert

ed into

plu

g.

Ensu

re t

hat

no

pin

s ar

e ben

t or

dam

aged

in E

CU

.

Chec

k fo

r dam

aged

gro

und

wire

(white)

in c

ontr

ol hea

d

har

nes

s.

Ver

ify

continuity

to c

has

sis

gro

und w

ith w

hite

contr

ol

hea

d w

ire

at v

ario

us

poin

ts.

Loss

of gro

und o

n t

his

wire

render

s co

ntr

ol hea

d

inoper

able

.

All

oth

er f

unct

ions

work

.Chec

k fo

r dam

aged

blo

wer

sw

itch

or

pote

ntiom

eter

and

asso

ciat

ed w

irin

g.

Blo

wer

sta

ys o

n

hig

h s

pee

d w

hen

ig

nitio

n is

on o

r off.

Unplu

g 3

-wire

BSC c

ontr

ol

connec

tor

from

ECU

. If

blo

wer

sh

uts

off,

ECU

is

eith

er

impro

per

ly w

ired

or

dam

aged

.

Be

sure

the

smal

l, 2

0 G

A w

hite

gro

und w

ire

is c

onnec

ted

to t

he

bat

tery

gro

und p

ost

. If

it

is,

repla

ce t

he

ECU

.

Unplu

g 3

-wire

BSC c

ontr

ol

connec

tor

from

ECU

. If

blo

wer

st

ays

runnin

g,

BSC is

eith

er

impro

per

ly w

ired

or

dam

aged

.

Chec

k to

ensu

re t

hat

no B

SC w

irin

g is

dam

aged

or

short

ed t

o v

ehic

le g

round.

The

BSC o

per

ates

the

blo

wer

by

gro

und s

ide

puls

e w

idth

modula

tion s

witch

ing.

The

posi

tive

wire

to t

he

blo

wer

will

alw

ays

be

hot.

If th

e “g

round”

side

of

the

blo

wer

is

short

ed t

o c

has

sis

gro

und,

the

blo

wer

will

run o

n H

I.

Rep

lace

BSC (

This

will

req

uire

rem

oval

of

evap

ora

tor

from

veh

icle

).N

o o

ther

par

t re

pla

cem

ents

sh

ould

be

nec

essa

ry.

Com

pre

ssor

will

not

turn

on

(All

oth

er funct

ions

work

).

2.

Sys

tem

is

not

char

ged

.Sys

tem

must

be

char

ged

for

com

pre

ssor

to e

ngag

e.Char

ge

syst

em o

r byp

ass

pre

ssure

sw

itch

.

Dan

ger:

Never

byp

ass

sa

fety

sw

itch

wit

h

en

gin

e r

un

nin

g.

Seri

ou

s in

jury

can

resu

lt.

Sys

tem

is

char

ged

.

1b

.

Tro

ub

lesh

oo

tin

g G

uid

e

Chec

k fo

r fa

ulty

A/C

pote

ntiom

eter

or

asso

ciat

ed

wirin

g (

Not

applic

able

to 3

-pot

contr

ols

).

Chec

k fo

r dis

connec

ted o

r fa

ulty

ther

mis

tor.

Chec

k co

ntinuity

to g

round o

n w

hite

contr

ol hea

d w

ire.

Chec

k fo

r 5V o

n r

ed c

ontr

ol hea

d w

ire.

Chec

k 2-p

in c

onnec

tor

at E

CU

housi

ng.

To c

hec

k fo

r pro

per

pot

funct

ion,

chec

k vo

ltag

e at

w

hite/

blu

e w

ire.

Voltag

e sh

ould

be

bet

wee

n 0

V a

nd

5V,

and w

ill v

ary

with p

ot

leve

r posi

tion.

Dis

connec

ted o

r fa

ulty

ther

mis

tor

will

cau

se

com

pre

ssor

to b

e dis

able

d.

Red

wire

at A

/C p

ot

should

hav

e ap

pro

xim

atel

y 5V

with ignitio

n o

n.

White

wire

will

hav

e co

ntinuity

to

chas

sis

gro

und.

White/

Blu

e w

ire

should

var

y bet

wee

n 0

V a

nd 5

V w

hen

le

ver

is m

oved

up o

r dow

n.

3. Com

pre

ssor

will

not

turn

off

(A

ll oth

er funct

ions

work

).

Chec

k fo

r fa

ulty

A/C

pote

ntiom

eter

or

asso

ciat

ed

wirin

g.

Chec

k fo

r fa

ulty

A/C

rel

ay.

Rep

air

or

repla

ce p

ot/

contr

ol w

irin

g.

Rep

lace

rel

ay.

See

blo

wer

sw

itch

chec

k pro

cedure

.


Sym

pto

m

C

on

dit

ion

Ch

eck

s

Act

ion

s

N

ote

s

Sys

tem

will

not

turn

on,

or

runs

inte

rmitte

ntly.

4.

Work

s w

hen

engin

e is

not

runnin

g;

shuts

off w

hen

en

gin

e is

sta

rted

(T

ypic

ally

ear

ly G

en I

V,

but

poss

ible

on a

ll ve

rsio

ns)

.

Nois

e in

terf

eren

ce f

rom

either

ig

nitio

n o

r al

tern

ator.

Inst

all ca

pac

itors

on ignitio

n c

oil

and a

lter

nat

or. E

nsu

re

good g

round a

t al

l poin

ts.

Rel

oca

te c

oil

and a

ssoci

ated

w

irin

g a

way

fro

m E

CU

and E

CU

wirin

g.

Chec

k fo

r burn

edor

loose

plu

g w

ires

.

Ver

ify

connec

tions

on p

ow

er

lead

, ig

nitio

n lea

d,

and b

oth

white

gro

und w

ires

.

Ver

ify

pro

per

met

er f

unct

ion b

y ch

ecki

ng t

he

conditio

n o

f a

know

n g

ood b

atte

ry.

Ignitio

n n

ois

e (r

adia

ted o

rco

nduct

ed)

will

cau

se t

he

syst

em t

o s

hut

dow

n d

ue

tohig

h v

oltag

e sp

ikes

. If

this

is s

usp

ecte

d,

chec

k w

ith a

qual

ity

osc

illosc

ope.

Spik

esgre

ater

than

16V w

ill s

hut

dow

n t

he

ECU

. In

stal

l a

radio

cap

acitor

at t

he

posi

tive

post

of th

e ig

nitio

nco

il (S

ee r

adio

cap

acitor

inst

alla

tion b

ulle

tin).

A

faulty

alte

rnat

or

or

worn

out

bat

tery

can

als

o r

esult

in t

his

conditio

n.

Will

not

turn

on u

nder

an

y co

nditio

ns.

Ver

ify

bat

tery

voltag

e is

gre

ater

than

10 v

olts

and les

sth

an 1

6.

Loss

of m

ode

door

funct

ion.

No m

ode

chan

ge

at a

ll.Chec

k fo

r dam

aged

mode

switch

or

pote

ntiom

eter

and

asso

ciat

ed w

irin

g.

Part

ial fu

nct

ion o

f m

ode

doors

.

Typic

ally

cau

sed b

y ev

apora

tor

housi

ng

inst

alle

d in a

bin

d in t

he

vehic

le.

Be

sure

all

mounting loca

tions

line

up

and d

on’t h

ave

to b

e fo

rced

in

to p

osi

tion.

Blo

wer

turn

s on

and o

ff r

apid

ly.

6.

Bat

tery

voltag

e is

at

leas

t 12V.

Chec

k fo

r at

lea

st 1

2V a

t ci

rcuit b

reak

er.

Ensu

re a

ll sy

stem

gro

unds

and p

ow

er c

onnec

tions

are

clea

n a

nd t

ight.

Bat

tery

voltag

e is

les

s th

an 1

2V.

5.

Tro

ub

lesh

oo

tin

g G

uid

e (

Co

nt.

)

Chec

k fo

r fa

ulty

bat

tery

or

alte

rnat

or.

Char

ge

bat

tery

.

Sys

tem

shuts

off b

low

er a

t 10V.

Poor

connec

tions

or

wea

k bat

tery

can

cau

se

shutd

ow

n a

t up t

o 1

1V.

7. When

ignitio

n is

turn

ed o

n,

blo

wer

m

om

enta

rily

co

mes

on,

then

sh

uts

off.

This

occ

urs

with t

he

blo

wer

sw

itch

in

the

OFF

posi

tion.

This

is

an indic

ator

that

the

syst

em h

as b

een r

eset

. Be

sure

the

red p

ow

er w

ire

is o

nth

e bat

tery

post

, an

d n

ot

on a

sw

itch

ed s

ourc

e. A

lso,

if

the

syst

em is

pulle

d b

elow

7V f

or

even

a s

plit

sec

ond,

the

syst

em w

ill r

eset

.

Run r

ed p

ow

er w

ire

direc

tly

to b

atte

ry.

Chec

k fo

r posi

tive

pow

er a

t hea

ter

valv

e gre

en w

ire

and

blo

wer

red

wire.

Chec

k fo

r gro

und o

n c

ontr

ol hea

d w

hite

wire.

Chec

k fo

r obst

ruct

ed o

r bin

din

g m

ode

doors

.

Chec

k fo

r dam

aged

ste

pper

m

oto

r or

wirin

g.

Err

atic

funct

ions

of

blo

wer

, m

ode,

te

mp,

etc.

Chec

k fo

r dam

aged

sw

itch

or

pot

and a

ssoci

ated

wirin

g.

Rep

air

or

repla

ce.

8.


THERMOSTAT ADJUSTMENT

AIR CONDITIONING ADJUSTMENTS:

ADJUSTING A/C THERMOSTAT

THERMISTORPROBE

ADJUST THISLEVER UP

OR DOWN TOREGULATE

TEMPERATURE

EVAP.

PLASTIC

THE AIR CONDITIONER THERMOSTAT LEVER (COLD LEVER) CONTROLS COIL TEMPERATURE.

ADJUSTING THE LEVER UP MAKES THE SYSTEM OPERATE COLDER. IF THE THERMOSTAT LEVER IS SETTOO COLD, THE EVAPORATOR MAY ICE UP UNDER HIGH HUMIDITY CONDITIONS. THE EVAPORATORCOIL IS RESTRICTED WITH ICE AND COLD AIR FLOW WILL BE REDUCED.

ADJUSTING THE LEVER DOWN MAKES THE SYSTEM OPERATE WARMER. THE COMPRESSOR CLUTCH WILLCYCLE MORE FREQUENTLY AND THE A/C SYSTEM WILL NOT GET AS COOL AS IT COULD.

OPTIMUM PERFORMANCE WILL BE ATTAINED WITH THE THERMOSTAT ADJUSTED AS COLD AS POSSIBLEWITHOUT ICING UP THE COIL AND THEN USING THE TEMP/BLEND LEVER (OFF/HEAT) TO ADJUST VENTTEMPERATURE.

1.) SYMPTOM: THE A/C WORKS WELL AT FIRST THEN QUITS COOLING. THE AIR FLOW FROM THE VENTS IS LOW AND THE COMPRESSOR CYCLES INFREQUENTLY. SOLUTION: THE THERMOSTAT LEVER IS SET TOO COLD, THE EVAPORATOR IS ICING UP AND RESTRICTING AIR FLOW. ALLOW THE ICE TO MELT BY MOVING THE THERMOSTAT LEVER DOWNWARD (WARMER) IN INCREMENTS OF 10% UNTIL SYMPTOMS DIMINISH.

2.) SYMPTOM: A/C NEVER GETS COLD AND THE COMPRESSOR CLUTCH CYCLES FREQUENTLY. SOLUTION: THE THERMOSTAT LEVER IS SET TOO WARM. ADJUST THE THERMOSTAT LEVER UPWARD (COLDER) IN INCREMENTS OF 10% UNTIL THE COMPRESSOR CLUTCH CYCLES INFREQUENTLY. AVOID SETTING THE THERMOSTAT LEVER TOO COLD.

TOP VIEW

NOTE: GEN IV UNITS DO NOT HAVE A REMOTE THERMOSTAT.THE THERMISTOR PROBE INSTALLED IN THE EVAPORATOR SERVES

AS THE THERMOSTAT, WHICH IS CONTROLLED BY THECOLD/OFF LEVER ON THE CONTROL PANEL.


(TOP)CORE SUPPORT

TEMPLATE

3 ¼”

2 ⅜”

2 ⅛”

1 ¼”DIAMETER

3 9/16

”2

5/16

”1”

1/2”

FOLD

PA

GE

AT

THIS

LIN

E A

ND

PO

SITI

ON

AT

EDG

E O

F C

ORE

SU

PPO

RT (

REM

OVA

BLE

PAN

EL)

5/16”DIAMETER

LOCATEEXISTING HOLES


EVAPORATOR KIT 56156-PCZEVAPORATOR KIT PACKING LIST

No. QTY. PART No. DESCRIPTION

1.2.

11

760156-VCE78256-PCN

1955-56 CHEVROLET EVAP. SUB CASE 4-VENT PLENUM1955-56 CHEVROLET CAR wo A/C VENT PLENUM ACC. KIT

CHECKED BY:PACKED BY:

DATE:

1955-56 CHEVROLET EVAP. SUB CASE

760156-VCE

1

ACCESSORY KIT78256-PCN NOTE: IMAGES MAY NOT DEPICT ACTUAL PARTS AND QUANTITIES.

REFER TO PACKING LIST FOR ACTUAL PARTS AND QUANTITIES.

2

1955-56 chevrolet

Documents