MITSUBISHI ELECTRIC PAC-SG77RJ-E Air Conditioner Instruction Manual

MITSUBISHI ELECTRIC PAC-SG77RJ-E Air Conditioner

SAFETY PRECAUTIONS

• Carefully read this section ‘Safety Precautions’, and securely install the optional parts.

• Be sure to observe the caution’s described here: They include critical contents for safety.

• The following indications show the classification of danger, and possible consequences following incorrect handling.
  **** Incorrect handling could lead to death or serious injury.
  Incorrect handling could lead to death or serious injury.

• After installation, periorm a test run and make sure that there is no abnormality, and ask your customer to keep this installation sheet with the installation manual at all times. Also ask the customer to transfer these manuals to a new user if the user changes.

Ask the dealer or specialist for installation.

• If installed incorrectly by user, water leak, electric shock , fire, etc, Could result.

Securely perform installation using tools and piping parts specially make for the refrigerant R410A, according to this installation manual.

• Since pressure of HFC Type refrigerant R410A being used increases higher about 1.6 times compared with conventional  refrigerant, if specified piping parts are not used or installation in not correct. it could cause explosion or injury , and in less sever cases, water leak, electric shock or fire.

If the unit is installed in a small room make sure that limit density will not be exceeded even if refrigerant leaks.

• Consult you dealer for proper countermeasures against exceeding limit density.
• If limit density is exceeded, it may cause lack of oxygen hazard.

Ventilate if refrigerant leaks.

• If refrigerant touches heat source, it could cause generation of harmful gas.

When installing or reinstalling after moving , do not material inside refrigerant cycle then refrigerant specified (R410A)

• If air, etc. is mixed, pressure inside refrigerant cycle may become abnormally high, which could cause explosion, etc.

Never remodel

• Consult your dealer for repair. if remodeled or repaired incorrectly by user, it may cause water leak, electric shock or fire.

Do not move and re-install by user itself.

• If installation is not correct, it may cause water leak, electric shock or fire, Ask your dealer or vendor

After installation is complete make sure that refrigerant does not leak

• If refrigerant leaks inside the room and reaches heat source such as fan heater , stove, etc, it could cause generation of harmful gas.

Before installation

Do not use in unusual circumstances

• Do not in a place where there is much oil (Including machine Oil)
  Steam, Sulfraction gas, or high salt content (Sea side area), or where outdoor unit is blocked by snow cover, Doing so could damage the performance of  the unit and parts may be broken.

Do not install in a place where flammable gas could be generated flow in, remain or leak.

• Gas accumulating around the unit could cause fire or explosion.

Before performing installation (moving)

Securely apply heat-insulation to refrigerant pipe so that no condensation occurs.

• If heat-insulation is incorrect, condensation could occur on the surface of pipes and dewdrops could accumulate on ceiling, floor or leakage of refrigerant after a long period of time. important goods.

Tighten Flare nuts using torque wrench according to the specified method.

• If tightened too strongly, there could occur breakage of flare nut or leakage of refrigerant after a long period of time.

Before installing these optional parts, be sure to road **SAFETY PRECAUTION** 1n the installation manual attached to the outdoor unit and observe instructions given there.

Make sure that the part for each model besides this manual is in the box.

This manual is common for each model. See the packaging for the model name of the supplied part.

Joint Pipe PAC-SG77RJ-E branch box or branch pipe side: 0 15.88 (5/8″)) onsite pipe side: 0 25.4 (1 “)
**Branch box or branch pipe side

Joint Pipe
**

PAC-SL02RJ-E (branch box or branch pipe side: 015.88 (5/8″)) onsite pipe side: 0 28.58 (1-1 /8″)
Branch box or branch pipe side

0nsite pipe side

Note: When connecting an onsite pipe, protect the welding part of the joint pipe.

Joint Pipe PAC-S L03RJ-E ( branch pipe side: ø 22.2 (7/8″), ) onsite pipe side: ø 28.58 (1-1/8″)
Branch pipe side

Onsite pipe Side

Installation procedure (carefully read the following before installing.)
This optional part is used to connect branch box or branch pipe to onsite pipes of different diameters.

• When installing this optional part, be sure to read “Refrigerant pipe connection” in the installation manual attached to outdoor unit.

1. Put flare nut on joint pipe. Flare the end ( ( ø 15.88 (5/8″)) of joint pipe to adapt to R41 QA, according to the table on the right.
   Use the flare nut attached to branch box or branch pipe.

   • Check the installation manual attached to the outdoor unit for advisability on whether or not onsite (existing) pipes can be used

Outer diameter of copper pipe (mm) (in)

|

Processing size of flare section (mm) (in) ø A

| Flare shape
---|---|---

ø 15.88 (5/8″)

|

19.3 – 19.7 (49/64″- 25/32″)

|

| Pipe diameter (mm)(in)| B size (mm) (in)
---|---|---
ø 15.88 (5/8″)| R41 OA flare tool
Clutch type
0 – 0.5 (0/64″)

When flare processing for refrigerant R41 OA is applied using current tool, refer to the table above.
B size can be secured using copper pipe gauge for margin adjustment.

2. 1nsert refrigerant pipe (procured locally) into joint pipe until it stops at the expanded part of the joint pipe, and then connect them using anti-oxidation soldering.
   Take care that no foreign object, such as dust, enters the piping during pipe connecting work.

3. Apply refrigerant oil (procured locally) thinly on flare surface.

4. For connection, first align the center, then tighten the first 3 to 4 turns of flare nut by hand.
   Refrigerator oil application point

   Apply refrigerator oil to entire circumference of flare sheet surface

   • Do not apply to thread section.
     (11 applied to threads, flare nut can easily be loosened.)

5. Securely tighten flare nut using torque wrench according to the table on the right.

   Outer diameter of copper pipe (mm) (in)| Tightening torque (N•m)*(lbf,ft) ---|--- **ø** 15.88 (5/8″)| 68- 82 (51-60)

*1 N-m ‘cc; 10 kgf-cm

6. After refrigerant pipe is connected, be sure to perform gas leakage inspection for onsite connection pipes (including this optional part) and branch box or branch pipe.
7. Heat insulation is necessary for this optional part: Wrap heat insulator (locally procured) around the onsite pipes and also the optional part (for dewdrop dripping prevention).
8. Perform test run according to the installation manual of the unit, making sure to also perform operation check.

MITSUBISHI ELECTRIC CORPORATION RK79T921 H01

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