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[Datsun 1200 encyclopedia]

Air conditioning

(Redirected from Aircon)

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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.

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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.

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  • 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
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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.

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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
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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 of brackets were used over the years to fix the compressor to the engine. Early A12 and late A12 brackets differ.

See Main Article: Compressor brackets

You can make your own brackets, buy used from a B110/B210/B310 or Cherry/Pulsar, or buy new.

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Evaporator

RHD factory Nissan
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Seen in USA
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LHD kit by Vintage Air 672001-VHY $309 at Summit
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Australia aftermarket
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Left-hand Drive

Ecuador

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Taiwan

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USA

1972 Brochure
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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

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Specifications

Frigiking dealer-installed package. Larger capacity than 240Z, but less than 510 or 521 pickup
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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: 28F 2
 Cold cut-in: 36F 2
 Warm cut-out: 58F 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

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USA Type Frigette

Frigette Brand. Aftermarket kits still sold at JC Whitney!

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Optional Fan

Nissan option flex-fan (dealer item)
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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.

See Main Article: 1979 aircon

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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.

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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)
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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
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comes with compressor fixing bracket for the A-series block

Condensor 12 inch12 inch T22mm O-rings
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Fitting F3/8-O5/16 reducer + F1/2-> O1/2 < reducer
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Receiver-dryer and liquid tank < filter > PSW with O ring 5/16S-5/16S | bracket
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Unicla electric pusher fan 8-inch | tie-locks
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Relay
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Crank pulley with extra groove for AC compressor drive belt
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Hoses similar to this, made of varying quality components
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OPTION 25000 Yen - 6-blade cooling fan
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OPTION 58000 Yen - genuine brass radiator, fit original fan shroud (not included)
OPTION 13000 Yen - fan shroud
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Front-distributor A12

Japan setup for front-distributor A12
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1977

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

Unicla imperial-III under-dash unit
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Unusual compressor mount
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idler pulley
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Unicla DA-299 compressor
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Unusual 6-blade fan
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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:

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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!

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This page has been accessed 67,504 times. This page was last modified 19:30, 17 March 2019. Content is available under Datsun 1200 Club.