SuperSnow KX-450K User manual

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Installation Manual
KX-450K

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Table of contents
1、Installation Instruction.................................................................................................................................................................................................3
2、Check fitting kit to make sure all parts and drawing are present..............................................................................................................5
3、Preparation before condenser and evaporator installation...........................................................................................................................6
3.1 Condenser installation............................................................................................................................................................................................10
3.2 Evaporator installation............................................................................................................................................................................................11
4、Hose and clamp installation...................................................................................................................................................................................12
5、Refrigeration line, defrost drain hoses and electrical cables installation.............................................................................................15
6、Charge compressor oil.............................................................................................................................................................................................21
7、Mount compressormounting kit & compressor(optional)..........................................................................................................................22
8、Check leak and evacuate system..........................................................................................................................................................................26
9、Check and charge refrigerant................................................................................................................................................................................28
10、Install cab control and connect electricals.....................................................................................................................................................29
11、Check and adjust CPR(only suitable for unit with R404A)....................................................................................................................34
12、Check and adjust expansion valve superheat................................................................................................................................................36
13、Installation overview..............................................................................................................................................................................................37

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1、Installation Instruction
Protective Equipment
Safety first
Recommendations
■Always use adequate personal protective equipment before doing anything on this unit.
■Technicians must wear the proper PPE in right way, including full body harness with two
hooks in the waist, safety cap, safety glasses and safety shoes.
■Disconnect the vehicle battery:--Remove the battery ground(-);Then disconnect the positive
battery(+).
■Check the grip brake of truck to ensure it being launched in safe.
■Pull out the key.
■Put safety tag on the steering wheel.
■Drain hose from the evaporator to the outside must have an angle to insure water to be
drained out.
■A descent of 100mm minimum must be applied between evaporator drain water hoses and the
hoses inside the body.

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1、Installation Instruction
Installation steps
■Technicians must wear the proper PPE in right way,
including full body harness with two hooks in the waist,
safety cap, safety glasses and safety shoes.
■Check the grip brake of truck to ensure it being launched in
safe.
■Pull out the key.
■Put safety tag on the steering wheel.

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2、Check fitting kit to make sure all parts and drawing are present
Before installation
1.Unpack the box contents in your warehouse.
KEEP THE DOCUMENT DELIVERED WITH THE
UNIT
2. Unpack the box
3. Check the box content corresponds to the bill of material on
the packaging.
■ Condenser
■ Evaporator
■ Mounting kit
■ Cab command
Note
In the event of abnormality (missing, damaged part or
part number etc), fill in the form “Advance warning, DOA,
Claim” and contact Zhengzhou Kaixue Cold Chain Co.,
Ltd.

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3、Preparation before condenser and evaporator installation
Before installation
□Take care not to obstruct the air intakes on the
evaporator section and the ventilation ducts.
□For any mobile partition installation, contact our
Technical Department or refer to the attached chart.
Model
X
Y
KX-450K
1300mm
150mm

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3、Preparation before condenser and evaporator installation
Recommendations
Before box preparation and unit installation start, protect
the vehicle roof and the refrigeration box floor (cover,
cardboard…). And there should be the embedded bracket
inside the box.
Condenser installation
1.Present the drilling template – not supplied - (refer to the
bodybuilder drawing).
2.Mark out the 4 fixing holes and the electrical harness and
hoses hole, and drill(φ12.5mm).
Evaporator installation
1.Present the drilling template – not supplied - (refer to the
bodybuilder drawing).
2.Leave a minimum space of 150 mm between the box
wall and the rear of the evaporator.
3.If needed, use the fixing material adapted to
reinforcement done by the bodybuilder.
3.Drill a hole to pass hoses and harness.

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3、Preparation before condenser and evaporator installation
KX-450K condenser installation drawing

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3、Preparation before condenser and evaporator installation
KX-450K evaporator installation drawing

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3.1 Condenser installation
Condenser installation:
1.Remove the cover:
■ Remove the fixing nuts
■ Remove the cover
2.Fix the condenser in the middle of front wall panel, tie
the nuts when make sure it won’t be inclined.

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3.2 Evaporator installation
Evaporator installation:
1.Remove the evaporator cover:
■ Remove the fixing screws
■ Remove the cover
2.Fix the evaporator in the middle of front wall
panel, tie the nuts when make sure it won’t be
inclined.
3.Tighten the screws.

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4、Hose and clamp installation
Hose: Stocking
Recommendations
■ For a good functioning of refrigeration circuit,
refrigeration hoses must be clean and dry.
■ Hoses must be stocked in a dry area, with less
variation in temperature as possible and sheltered from
moisture.
■ The two ends MUST ABSOLUTELY been
blocked with tight caps to avoid any internal damages or
condensation until their connection into the circuit.
□To fit hoses and electrical harnesses, use as much as
possible RSGU clamps.
□To protect hoses and electrical harnesses, use adequate
rubber funnels to avoid cutting with metallic corners.

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4、Hose and clamp installation
Hose: Preparation
1.Tools required.
2.Cut the hose at the right length with appropriate tool.
3.Remove the hose cover.
4.Put POE oil on the connector on fitting.
5.Widen hose clearance with adapted tool before to insert.
double-click clamp.
6.Insert double-click clamp on the hose.

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4、Hose and clamp installation
Hose: Preparation
1.Lubricate the fitting.
2.Insert connector in the hose.
3.Crimp the double-click clamp with appropriate
crimping tool.
4.Example of a good preparation
■ The clamp gauge (arrow) is set between the hose
and the fitting stop. The clamp bands are perpendicular
with the fitting and hose.

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5、Refrigeration line, defrost drain hoses and electrical cables installation
Hose: Mounting
1.Do not twist or curve the hose.
2.Keep enough length to avoid length variation when the
pipes are under pressure.
3.Pipes length can vary between -2% to +4%.
4.Using elbows and fittings make easier installations, assist
accessibility and increase hoses/pipes life.
5.Always insure that minimum radius is respected. Provide
a radius as big as possible to avoid constriction.

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5、Refrigeration line, defrost drain hoses and electrical cables installation
Unit: Condenser connection refrigeration hoses
Recommendation
■Check O-ring if good, if not please replace with new one
Five ports in condenser, 2 connected to compressor, 3
connected to evaporator
1.Suction line-LP return gas (evaporator 2)
2.Road suction line-LP (compressor LP)
3.Road discharge line-HP (compressor HP)
4.Liquid line (evaporator 3)
5.Defrost pipe(evaporator 1)

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5、Refrigeration line, defrost drain hoses and electrical cables installation
Unit: Evaporator connection refrigeration hoses
3 Pipes to condenser
1.Hot gas defrost
2.Suction(LP return gas)
3.Liquid
Recommendation
■ Marks shall be made on the hot gas pipe line (at
both ends of the pipe) to avoid confusion with the liquid
pipe
■ The cap can only be removed before connecting
to reduce condensation in the pipe

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5、Refrigeration line, defrost drain hoses and electrical cables installation
Unit: refrigeration hoses
1.Connect the condenser, evaporator, compressor and
stand-by compressor to the corresponding ports as the
drawing.
2.The pipeline can’t be twined, use the strapping tape to fix
it tightly.
3.Use hose clamps to fix the pipes on the front wall to
avoid shaking. The strapping tape require 300mm, also can
increase elegant appearance.
4.The service valve should locate in a place which won’t
shake so can prevent leaking.
5.Ensure the pipe enough length on considering passing
the shaking engine.
6.Keep the pipes away from the engine exhaust pipe,
because the high engine temperature will make the pipes
early aging or burst. If have to pass, please ensure the
distance at least 250mm, also have to use a protection
rubber.

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5、Refrigeration line, defrost drain hoses and electrical cables installation
Unit: battery cable connection
1. Run the cab cable and hoses through the box.
2. Connect motors of evaporator.
3. Maintain all cables with plastic tie-wraps.

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5、Refrigeration line, defrost drain hoses and electrical cables installation
Evaporator: drain water pipe
RECOMMENDATIONS
A descent of MINIMUM 100mm must be applied
between the drain water hoses and the hoses inside the
body to help to drain water out.
1. Install drain hoses.
2. Connect the drain hoses.
3. Fix the drain hoses at the right position.
4. Insulate the drain tubes at evaporator side.
5. After connecting completion, block the gap