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[Datsun 1200 encyclopedia]

Air conditioning

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Category: Heating And Ventilation Systems

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

* Pump (Compressor) & mounting bracket
* Double crankshaft pulley. (The extra pulley runs the compressor)
* Condensor (cooling radiator)
* Filter dryer/receiver
* Under-dash vents
* Hoses 
* Wiring

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

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
* Later from 1980: Compact swash-type compressor

20081.jpgAlbum 20081 20080.jpgAlbum 20080 23101.jpgAlbum 23101

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

ヂーゼル機器(DKKC)

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

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

Engine Brackets, Early

Compressor on early A12 (1970-1973).

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), there were two versions of brackets.

High-mount Pulley
18710.jpgAlbum 18710

Low-mount Pulley (1979-up)
21783.jpgAlbum 21783 20079.jpgAlbum 20079

New Compressor-type
album

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

Early B210 Japan
25501.jpgAlbum 25501

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

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

B310 USA
11910-H9100 BRACKET-COMPRESSOR -0678
11910-H9101 BRACKET-COMPRESSOR 0778-
11910-H9900 BRACKET-COMPRESSOR 0879-

C120 Vanette A15
C120_A15_ac1.jpg C120_A15_ac2.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
3053.jpg
Dealer item

From 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.jpg
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.jpg

23102.jpg

You need all these parts:

  • Ass'y indoor "cooler unit" (with integrated air volume switch, evaporator, and blower fan)
    15193.jpg 4163.jpg
  • air conditioner compressor
    20084.jpg 20085.jpg
  • V-belt: 814 mm
    20089.jpg
  • compressor bracket
    20079.jpg
  • crank pulley (double V-belt version)
    20080.jpg
  • 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.jpg

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

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

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

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

th_aircon-1.jpg th_aircon-2.jpg th_aircon-3.jpg th_aircon-4.jpg th_aircon-5.jpg th_aircon-6.jpg th_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

1977

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

th_unicla-1.jpg th_unicla-2.jpg th_unicla-3.jpg th_unicla-4.jpg th_unicla-5.jpg th_unicla-6.jpg th_unicla-7.jpg th_unicla-8.jpg

Unusual compressor mount
25585.jpg 25586.jpg

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

Unicla DA-299 radial compressor
th_unicla_DA-299-1.jpg th_unicla_DA-299-2.jpg th_unicla_DA-299-3.jpg th_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.jpg

Of course the downside is there is no glove box.

18767.jpg

Photo Index

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 16244.jpg 17263.jpg 17654.jpg 17655.jpg 18256.jpg 18710.jpg 18767.jpg