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[Datsun 1200 encyclopedia]

Air conditioning

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Category: Heating And Ventilation Systems

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JDM B120 JDM B120
FOR RADIAL COMPRESSOR (1979-_) FOR RADIAL COMPRESSOR (1979-_)
- * 11910-95W00 BRACKET+ * 11910-G1615 BRACKET 7908-8910
 + * 11910-95W00 BRACKET 8910-
* 11925-G1615 IDLER PULLEY * 11925-G1615 IDLER PULLEY

Revision as of 03:45, 8 January 2017

Datsun 1200, unlike the Datsun 1000, was designed with air conditioning in mind. However, it was still a dealer-installed add-on option and so varied by country and region. In April 1978 it became a factory option for Japanese market Sunny Truck.

15622.jpg

Contents

Parts Needed

Buy Universal Air Conditioning kits - $500 on eBay. $1300 from Summit. Contain compressor and everything needed except engine mounting brackets and V-belt.

23101.jpgAlbum 23101 B110ac.jpg

  • Pump (Compressor) & mounting bracket
  • Double crankshaft pulley & V-belt
  • Condensor (radiator-like unit)
  • Filter dryer/receiver
  • Evaporator (under-dash unit)
  • Hoses
  • Wiring

double-belt Crankshaft Pulley
20080.jpgAlbum 20080

Since B110 A/C is fairly rare, you can source most of the parts from a B210 or B310. Only the interior vent setup is needed specific to the 1200.

13934.jpgAlbum 13934

9378.jpgAlbum 9378

Installation

  1. Install all the parts, except leave the dryer/receiver plug and unplumbed
  2. Drive to the aircon service shop
  3. They will evacuate the system (vacuum pump), charge with R-134a and appropriate oil

Compressor

The compressor pump bolts to the engine and is driven by a v-belt. A double-groove Crankshaft Pulley is fitted.

  • Early (to 1979): York-type compressor uses aluminum case. Commonly used from 1958-1980, they last a long time and are generally interchangeable between different car makes. When replacing, unbolt your clutch unit and bolt it to the new compressor.
  • Late (from 1980): Compact swash-type (radial) compressor

York-type | Radial
21309.jpgAlbum click to view 21308.jpgAlbum 21308

27630-G1660 COMPRESSOR-COOLER DKKC
27630-W7002 COMPRESSOR-COOLER DKKC [B421]
* JDM Datsun B120 8110-8910
* JDM Datsun 720 L18 7909-8105
92610-G1900 COMPRESSOR-COOLER DKKC [B421]
* B120 8910-
11910-G1661 BRACKET-COMPRESSOR 7804-7907
* 11911-G1661 BRACKET-COMPRESSOR [2nd piece]
11929-H1000 BELT-COMPRESSOR L-810 7804-7807 
11910-G1615 BRACKET-COMPRESSOR 7908-8910
11910-95W00 BRACKET-COMPRESSOR 8910-
11929-G1615 BELT-COMPRESSOR L-814 7808-
11925-A0100 PULLEY ASSY-IDLER,COMPRESSOR 7804-7807
11925-G1615 PULLEY ASSY-IDLER,COMPRESSOR 7808-
11917-M0100 BOLT-ADJUST 7804-7907
* 11933-A0100 NUT 7804-7907

Engine Brackets

Various types were used. Early A12 and late A12 brackets differ.

B110: All custom, various types
B120 1978-1979: Factory high-idler mount
B120 1980-: Factory low-idler pulley mount

A bracket can be fabricated of two 8mm strips of metal (going across) and two vertical strips to connect to the compressor. An idler pulley can be added from a Nissan or other vehicle.

V-belt: 810 or 814 mm
20088.jpgAlbum 20088 20089.jpgAlbum 20089

Engine Brackets, Early

Compressor on early A12 (1970-1973).

Custom install on right-side, battery moved to trunk, compressor place just above oil pump. Mounted like an alternator with no idler pulley
CIMG2332_convert_20090616103747.jpg

acb.jpg

This in an Australia 1200. It uses a humongous bracket to space the compressor out past the low-mounted alternator.
9377.jpgAlbum 9377 9378.jpgAlbum 9378

Here is a USA 1200 with a slightly different setup:
2185.jpgAlbum 2185

Late Engine

For late model A12 (1974-up).

Custom bracket for modern short compressor, made out of 6mm stock
20120628221909a02.jpg 20120701101711062.jpg

Low-mount B310 (H86, 1981-1982)
174_5806b82922ab6.jpgPost 481951 17554_5806e018e2f44.jpgPost 481953

Unknown bracket
18710.jpgAlbum 18710

1978 Factory Bracket

Old compressor type (York-type)
21822.jpgAlbum 21822 23103.jpgAlbum 23103

1979

New Compressor-type
21821.jpgAlbum 21821 23102.jpgAlbum 23102

Low-mount Pulley (1979-up) for radial type compressor
20081.jpgAlbum 20081 26588.jpgAlbum 26588 21783.jpgAlbum 21783 20079.jpgAlbum 20079 cb0.png cb1.jpg cb2.jpg cb3.jpg

B210

Early B210 Japan
25501.jpgAlbum 25501

'5 SPEED DATSUN 120YCCC'
17554_5806e01fac29e.jpgPost 481953

Vanette

C120 Vanette A15
C120_A15_ac1.jpg C120_A15_ac2.jpg

Part Numbers

JDM B120
FOR YORK-TYPE COMPRESSOR (1978)
* 11910-G1661 BRACKET A
* 11911-G1661 BRACKET B
* 11925-A0100 IDLER PULLEY
* 11933-A0100 ADJUSTER NUT
* 11917-M0100 ADJUSTER BOLT
JDM B120
FOR RADIAL COMPRESSOR (1979-_)
* 11910-G1615 BRACKET 7908-8910
* 11910-95W00 BRACKET 8910-
* 11925-G1615 IDLER PULLEY
USA B310
11910-H9100 BRACKET-COMPRESSOR -0678
11910-H9101 BRACKET-COMPRESSOR 0778-
11910-H9900 BRACKET-COMPRESSOR 0879-
JDM B310
11910-H7401 -8010 BRACKET-COMPRESSOR
11910-H8661 8011- BRACKET-COMPRESSOR
11925-H8900 IDLER PULLEY
JDM A10 A14
11910-H7401 BRACKET-COMPRESSOR -8003
11910-G2500 BRACKET-COMPRESSOR 8004-
11925-H8900 IDLER PULLEY 7804-
11925-M3001 IDLER PULLEY -7803
11925-W0400 IDLER PULLEY 7906- A14,Z16/Z18
11926-W0400 BRACKET-IDLER PULLEY 7906-
JDM C120
11910-G2500 BRACKET-COMPRESSOR 8106-8210
11910-G3400 BRACKET-COMPRESSOR A 8210-
11911-G3400 BRACKET-COMPRESSOR B 8210-
11910-G3401 BRACKET-COMPRESSOR 8407-
11925-H8900 IDLER PULLEY 
JDM C22 - high-mount pulley bracket
11910-G5100 BRACKET-COMPRESSOR
11910-G5110 BRACKET-COMPRESSOR
11925-H8900 IDLER PULLEY

Evaporator

RHD factory Nissan
15193.jpgAlbum 15193

LHD kit by Vintage Air 672001-VHY $309 at Summit
vta-672001vhy_sn_xl.jpg

Left-hand Drive

Ecuador

20065.jpgAlbum 20065

Taiwan

1285249278413329.jpg

USA

1972 Brochure
24798.jpgAlbum 24798 24799.jpgAlbum 24799 24800.jpgAlbum 24800

The air condition for Datsun cars is made by Frigiking. It's the only system approved by the Datsun factory.
Except that the Factory used a different brand. Frigiking was only used in USA.

USA Type 1

15622.jpgAlbum 15622

16243.jpgAlbum 16243 16244.jpgAlbum 16244 14556.jpgAlbum 14556 14557.jpgAlbum 14557\

acdash.jpg

Specifications

Frigiking dealer-installed package. Larger capacity than 240Z, but less than 510 or 521 pickup
24400.jpgAlbum 24400

PERFORMANCE
Capacity: 12,500 BTU/hour
Airflow: 180 CFM
Evaporator Coil: 3/8 x .016 cu tubes, 4 rows
 staggered pattern, 12" x 5" x 2-1/2"
 fin series 120 flat aluminum
Expansion Valve: 1-1/2 ton
ELECTRICAL
Fan Switch: Reostat
Thermostat: Ranco type A-30
 Cold cut-out: 28°F ±2°
 Cold cut-in: 36°F ±2°
 Warm cut-out: 58°F ±4°
Fan Motor: Double shaft, single speed, 4600 RPM @ 13.5 V
 11.5 amps maximum current draw
Clutch: Pitts 6" double groove 12V 4.0 amp
Wiring: SAE specification J558a
Overload Protection: Inline fuse 30 amps
COMPRESSOR: York 206 (6 cubic inches)
CONDENSOR: 3/8 x .016 cu. tube, 2 row inline pattern
 13 x 12 x 1-1/2 fin seris 10 fins/inch
GENERAL KIT COMPONENTS: All meet SAE specifications
COMPRESSOR MOUNT KIT
Brackets are 1/4" hot rolled steel, arc welded and painted
Drive Pulley material: ASTMA-159, Class G3000, grey cast iron
 precision machined, balanced and painted
Idler Pulley: Cast iron, fully machined with single-row sealed ball bearing
Attaching Hardware: Grade 5, black, rust resistant
Compressor Drive Belt: Standard automotive quality, 500 section
EVAPORATOR SECTION
Material: High-strength injection-molded plastic case
Knobs: injection-molded plastic

USA Type 2

10-30-2005102833AM.jpg

USA Type Frigette

Frigette Brand. Aftermarket kits still sold at JC Whitney!

2187.jpgAlbum 2187

Optional Fan

Nissan option flex-fan (dealer item)
3053.jpgAlbum 3053

USA catalog
* 21060-H1001 FAN-COOLING A12 (standard B110 fan)
* 21060-A4605, 21060-N0100 FAN-COOLING D=330 FOR TROPICAL USA
  330 mm diameter

Sunny Truck Kit

Starting 1978 April a factory cooler kit was offered with upright compressor and standard interior unit. It is a very nicely designed unit, however the interior cooler protrudes into the passenger legroom and precludes using a package tray.

From October 1979 a uniform kit was offered with DKKC radial-type compressor.

20078.jpgAlbum 20078
This kit is beautiful and easy to install. Unfortunately the interior cooler unit is bulky and protrudes farther into the passenger legroom than other types.

20087.jpgAlbum 20087

You need all these parts:

  • Ass'y indoor "cooler unit" (with integrated air volume switch, evaporator, and blower fan)
    15193.jpgAlbum click to view 4163.jpgAlbum click to view
  • air conditioner compressor
    20084.jpgAlbum click to view 20085.jpgAlbum click to view
  • V-belt: 814 mm
    20089.jpgAlbum click to view
  • compressor bracket
    20079.jpgAlbum click to view
  • crank pulley (double V-belt version)
    20080.jpgAlbum click to view
  • Twin Condensors (before radiator, radiator horizontal)
    One has an electric fan
    • Pipe connecting twin condensors
  • High-pressure flexible pipe (from compressor to condensor)
  • Low-pressure hose (from evaporator to compressor)
  • Tube-Liquid Tank to Evaporator
  • Liquid Tank
    • Bracket to mount Tank on core support
  • Receiver tank (Liquid tank)
  • Relay (for compressor)
  • Wiring harness
  • Capacitor for electric fan

Vents may be opened or closed:
20082.jpgAlbum 20082

Twin Condensors and Liquid Tank with connecting pipes.
20086.jpgAlbum 20086

Condensor-to-Liquid Tank hose is routed along the top of core support.
15192.jpgAlbum 15192

Compressor is mounted low on left side of engine.
15194.jpgAlbum 15194

Cooler Unit lines: Evaporator Inlet & Outlet and drain hose
20083.jpgAlbum 20083

aircon-1.jpg aircon-2.jpg aircon-3.jpg aircon-4.jpg aircon-5.jpg aircon-6.jpg aircon-7.jpg

Retail Kit

Acqua Garage sells a R-134a kit, 2015 price was 300000 Yen (about $3000 USD).

  • 1 hanging unit Unicla IMPERIAL III with 5/16 - 5/8 O-ring
  • 2 AC compressor UP-90 = U02/A / A charging valves (no)
  • 3 12 x 12 Condensor plust reducer joints
  • 4 receivers & receiver BK
  • 5 electric fan unicla 8 inch PUSH & banding
  • 6 General purpose relay 2 pc
  • 7 a. Special design compressor fixing bracket.
  • 8 AC for stock taking crank pulley
  • 9 cooling fan & spacers
  • 10 hose

Unicla hanging unit 12V R134a right hand drive AG ALL-BLACK specifications (genuine Unicla, not a "Star Road" made in China knockoff)
GB122-270813-1-2.jpg

O-rings made in Japan products composition 5/16-5/8 UNIF wiring fuse + universal mounting bracket included

AG special compressor UP 90 + U02 < gas valve protection > 12 V R134a O-rings
A/A clutch parts w/< front thickness and > pressure valve with 1/2 - 5/8 UNIF
UP90-U02-270424-5-21.jpg
comes with compressor fixing bracket for the A-series block

Condensor 12 inch×12 inch T22mm O-rings
12inch-1-3.jpg

Fitting F3/8-O5/16 reducer + F1/2-> O1/2 < reducer
O-O-4-4.jpg

Receiver-dryer and liquid tank < filter > PSW with O ring 5/16S-5/16S | bracket
PSW5-16-3-2.jpg Receiver-BK2-2.jpg

Unicla electric pusher fan 8-inch | tie-locks
unicla-8inch7-4.jpg umkit4_4.jpg

Relay
12V-Relay1-1.jpg

Crank pulley with extra groove for AC compressor drive belt
CP-GB122-270919-2-2.jpg

Hoses similar to this, made of varying quality components
SunnyTrack-hose4-2.jpg

OPTION 25000 Yen - 6-blade cooling fan
GB122-CFAN270827-8-2.jpg

OPTION 58000 Yen - genuine brass radiator, fit original fan shroud (not included)
OPTION 13000 Yen - fan shroud
SUUNY270915-3-2.jpg

Front-distributor A12

Japan setup for front-distributor A12
21644.jpgAlbum 21644 21645.jpgAlbum 21645 21646.jpgAlbum 21646

1977

Non-factory Unicla 311609 from 1977 Sunny Truck H-B120

Unicla imperial-III under-dash unit
unicla-1.jpg unicla-2.jpg unicla-3.jpg unicla-4.jpg unicla-5.jpg unicla-6.jpg unicla-7.jpg unicla-8.jpg

Unusual compressor mount
25585.jpgAlbum 25585 25586.jpgAlbum 25586

idler pulley
pulley-1.jpg pulley-2.jpg

Unicla DA-299 compressor
unicla_DA-299-1.jpg unicla_DA-299-2.jpg unicla_DA-299-3.jpg unicla_DA-299-4.jpg

Unusual 6-blade fan
25587.jpg 25588.jpg

Idle Speed Control

In 1989 they added the FICD (Fast Idle Control Device) to raise idle speed about 100 RPMs when the compressor runs.

See Main Article: FICD

Legroom

Since the cooler unit takes up some of the passenger legroom, what to do? One enterprising 1200 fan mounted the cooler unit in the dash:

18256.jpgAlbum 18256 18767.jpgAlbum 18767

Of course the downside is there is no glove box.

Photo Index

Click any thumbnail to see it full size in our Club Photo Album. Read details or post a comment!

2185.jpg 2187.jpg 2199.jpg 2209.jpg 2210.jpg 2341.jpg 2495.jpg 3053.jpg 3811.jpg 4163.jpg 4164.jpg 4305.jpg 5060.jpg 5063.jpg 7777.jpg 9377.jpg 9378.jpg 11444.jpg 12038.jpg 13181.jpg 13934.jpg 14556.jpg 14557.jpg 14950.jpg 14953.jpg 15192.jpg 15193.jpg 15194.jpg 15622.jpg 16243.jpg f16244.jpg 17263.jpg 17654.jpg 17655.jpg 18256.jpg 18710.jpg 18767.jpg 21300.jpg 21301.jpg 21302.jpg 21303.jpg 21304.jpg 21305.jpg 21306.jpg 21307.jpg 21308.jpg 21309.jpg
 
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