Toshiba RAV-SP302AT2P-UL, Руководство по установке

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
System requirements
• Minimum refrigerant line length between the outdoor
unit and indoor unit is 16 ’ 5” (5 m)
• Maximum pipe lengths
Allowable
pipe length
(ft (m))
Height difference
(Indoor-outdoor H)
(ft (m))
Number of
bent
portions
Total length
L
Indoor unit:
Upper
Outdoor unit:
Lower
10 or less
246’1” (75) 98’5” (30) 98’5” (30)
Figure of Single
Refrigerant sizes
Liquid side Gas side
Outer
diameter
Thickness
Outer
diameter
Thickness
Ø3/8”
(9.5 mm)
0.03”
(0.8 mm)
Ø5/8”
(15.9 mm)
0.04”
(1.0 mm)
Flare nuts and flaring
• The flare nuts and flaring are different from those for
the conventional refrigerant.
Use the flare nuts supplied with the air conditioner
or those for R410A.
• Before performing flaring, carefully read
“REFRIGERANT PIPING”
Insulation (Local supplied)
Both lines need to be insulated. Use a minimum
0.4” (10 mm) wall thickness.
Refrigerant charge
Length of refrigerant
pipe connected to
indoor/outdoor unit
Additional refrigerant
16’5” - 98’5”
(5 - 30 m)
None
*98’5” - 246’1”
(30 - 75 m)
Add 0.43 oz/ft (40 g/m) of
refrigerant for piping that exceeds
98’5” (30 m) up to 246’1” (75 m).
* Caution during addition of refrigerant
Max. amount of additional refrigerant is 1.8 lbs (800 g).
Charge the refrigerant accurately. Overcharging may
cause serious trouble with the compressor.
* Minimum refrigerant pipe is 16’5”(5 m).
This may cause a malfunction of the compressor or
other devices.
Metering Device is an electronic EXV (PMV) in
outdoor unit.

Connecting power and control
cables (Field supplied)
• The main power is supplied to the outdoor unit. The
field supplied connecting cables from the outdoor
unit to the indoor unit consist for 4 wires and provides
the power for the indoor unit as well as the
communication signal between the outdoor and
indoor unit.
• System interconnection wire size must be AWG16.
• Breaker must have a capacity specified in the
following table.
• All wiring must comply with local electric codes and
NEC (National Electric Code) or CEC (Canadian
Electric Code).
Model RAV- SP302, 362, 422, 482
Power supply 208/230V, 60 Hz
MCA 30A
MOCP (MAX Fuse/CB) 40A
Breaker 32A
System interconnection wires AWG16
Field power supply wires AWG10
MCA = Minimum Circuit Amps
MOCP =Maximum Over Protection Device Amps.
Indoor Unit
Outdoor Unit
21-EN 22-EN
6
Vacuum
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Never use the system compressor as a vacuum pump.
Refrigerant tubes and indoor heat exchanger should
be evacuated using the recommended deep vacuum
method of 500 microns. The alternate triple evacuation
method may be used if the procedure outlined below is
followed. Always break a vacuum with dry nitrogen.

System vacuum and charge
Using Vacuum Pump
1. Completely tighten flare nuts A, B, C, D, connect
manifold gage charge hose to a charge port of the
low side service valve.
2. Connect charge hose to vacuum pump.
3. Fully open the low side of manifold gage.
4. Start vacuum pump.
5. Evacuate using either deep vacuum or triple
evacuation method.
Service Valve
Manifold
Manifold Gage
Outdoor Unit
500 microns
Low side valve
Low side valve
High side valve
Vacuum pump
Indoor Unit
Service Valve
High Side
Refrigerant
Low Side
Charge hose
Charge hose
6. After evacuation is complete, fully close the low side
of manifold gage and stop operation of vacuum
pump.
Deep Vacuum Method
The deep vacuum method requires a vacuum pump
capable of pulling a vacuum of 500 microns and a
vacuum gage capable of accurately measuring this
vacuum depth. The deep vacuum method is the most
positive way of assuring a system is free of air and
liquid water.
Triple Evacuation Method
The triple evacuation method should only be used
when vacuum pump is only capable of pumping down
to 28 in. of mercury vacuum and system does not
contain any liquid water.
Refer to “Triple Evacuation Method chart” and proceed
as follows:
1. Pump system down to 28 in. of mercury and allow
pump to continue operating for an additional 15
minutes.
2. Close service valves and shut off vacuum pump.
3. Connect a nitrogen cylinder and regulator to system
and open until system pressure is 2 psig.
4. Close service valve and allow system to stand for
1 hr. During this time, dry nitrogen will be able to
diffuse throughout the system absorbing moisture.
5. Repeat this procedure as indicated in the chart.
System will then be free of any cotaminants and
water vapor.
Deep Vacuum Graph
MICRONS
MINUTES
LEAK IN
SYSTEM
5000
4500
4000
3500
3000
2500
2000
1500
1000
500
0 1 2 3 4 5 6 7
VACUUM TIGHT
TOO WET
TIGHT DRY
SYSTEM
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