Rinnai HSNRP26 Pro Series High Wall Split Heat Pump Air Conditioner Installation Guide

Rinnai HSNRP26 Pro Series High Wall Split Heat Pump Air Conditioner

Safety messages / important information

This appliance is heavy, use two people or a mechanical lifting device. Improper lifting may result in serious injury.

For safety and warranty, appliances that are damaged MUST NOT be installed or operated under any circumstances.

Electrical warnings
DO NOT modify the electrical wiring of this appliance. If the control power wiring is
damaged or deteriorated then it must be replaced by an authorised person. Failure to do so WARNING
may result in electric shock, fire, serious injury, or product failure.
All wiring must be properly arranged to ensure that the control board cover can close properly. If the control board cover is not closed properly, it can lead to corrosion and cause the connection points on the terminal to heat up, catch fire, or cause electrical shock.
The PCB is designed with a fuse to provide overcurrent protection. The specifications of the fuse are printed on the PCB. For units using R32 refrigerant, only a blast-proof ceramic fuse can be used.
Only connect the unit to an individual branch circuit outlet. Do not connect another appliance to that outlet.

Electrical wires
This a Class 1 electrical appliance. Make sure the live wire, neutral wire, and earth wire in the power socket are properly connected. Inadequate or incorrect electrical connections may cause fire or electric shock.
The yellow-green wire in the air conditioner is the earthing wire which cannot be used for any other purpose. Improper earthing may cause electric shock. The unit must be earthed in accordance with local regulations.
Every wire must be firmly connected. Loose wiring can cause the terminal to overheat, resulting in a product malfunction and possible fire.
Do not let live wires touch or rest against refrigerant tubing, the compressor, or any moving parts within the unit.

Circuit breaker
The circuit break must have the functions of magnetic tripping and heat tripping to prevent short circuiting and/or overload. Use a standard circuit breaker and fuse conforming with the rating of the appliance.
Fixed wiring
If connecting power to fixed wiring1:

• A surge protector and mains power switch should be installed.
• A switch or circuit breaker that disconnects all poles and has a contact separation of at least ⅛ ″(3 mm) must be incorporated in the fixed wiring.

R32 refrigerant

This appliance uses R32 (difluoromethane) refrigerant, which is a flammable gas, class 2.2 according to AS/NZS 1677 and must be handled by a qualified person with the appropriate refrigerant handling licence.
Make sure to check for and rectify any refrigerant leaks after you install or repair the unit.
Certain levels of refrigerant require minimum room sizes. Please ensure that these room sizes are adhered to for standard installations (up to 10 m pipe length). If larger refrigerant charges than standard are used then please consult AS/NZS 60335.2.40 to determine the safe minimum floor area for the installation.
Make sure the area has been made safe by having suitable ventilation and is free from ignition sources before charging or releasing the charge of R32.

Model| 2.6 kW| 3.5 kW| 5.0 kW| 6.0 kW| 7.0 kW| 8.0 kW
---|---|---|---|---|---|---
Standard charge (g)| 900| 900| 1260| 1260| 1400| 1400
Min. floor area (m 2)| 4.0| 4.0| 4.0| 4.0| 4.0| 4.0

Pro Series specification summary

 | 2.0kW| 2.6kW| 3.5kW| 5.0kW| 6.0kW| 7.0kW| 8.0kW
---|---|---|---|---|---|---|---
Nominal Capacity| kW| 2| 2.65| 3.55| 5| 6| 7| 8
Power Supply to Outdoor Unit| V – Ph – Hz| 220~240 – 1 – 50
Recommended Circuit Breaker| A| 16| 16| 16| 20| 20| 25| 25

Cooling

| Rated Capacity| ****

kW

| 2| 2.65| 3.55| 5| 6| 7| 8
Capacity Range| 0.80-2.90| 1.00-3.50| 1.50-4.90| 2.10-7.20| 2.10-7.20| 2.95-9.00| 2.95-9.00
Rated Power Input| W| 415| 530| 820| 1300| 1800| 1950| 2350
Rated Current (Range)| A| 1.8| 2.5| 3.8| 5.8| 8| 8.7| 10.2
AEER| W/W| 4.780| 4.968| 4.311| 3.836| 3.327| 3.584| 3.399
Star Rating*| –| 5.5 / 5.0 / 5.5| 6.0 / 5.5 / 6.0| 5.0 / 4.0 / 5.0| 4.5 / 4.0 / 4.5| 4.0 / 3.5 / 4.0| 3.5 / 3.5 / 4.0| 3.5 / 3.5 / 3.5

Heating

| Rated Capacity| ****

kW

| 2.25| 2.7| 4| 5.2| 6.2| 7.5| 8.5
Capacity Range| 0.90-3.00| 1.40-4.00| 1.80-5.10| 2.50-7.80| 2.50-7.80| 3.50-9.50| 3.50-9.50
Rated Power Input| W| 460| 510| 920| 1350| 1700| 1950| 2250
Rated Current (Range)| A| 2| 2.5| 5| 6| 7.5| 8.7| 10
ACOP| W/W| 4.856| 5.259| 4.332| 3.842| 3.640| 3.839| 3.772
Star rating*| –| 3.5 / 3.0 / 3.0| 4.0 / 3.5 / 3.0| 4.0 / 3.0 / 2.0| 3.0 / 2.5 / 2.0| 3.0 / 2.0 / 1.5| 3.5 / 2.5 / 1.5| 3.0 / 2.0 / 1.5
Max. Input Power (Cooling / Heating)| W| 2100| 2300| 2300| 3600| 3600| 4050| 4050
Max. Input Current (Cooling / Heating)| A| 9.5| 10.5| 10.5| 15.5| 15.5| 17.5| 17.5
Area Coverage (up to 2.6m insulated ceiling)| m²| 9-13| 11-17| 16-23| 23-33| 27-40| 32-47| 36-53
Indoor Unit Model No.| 2.0kW Indoor| 2.6kW Indoor| 3.5kW Indoor| 5.0kW Indoor| 6.0kW Indoor| 7.0kW Indoor| 8.0kW Indoor
Air Flow (Turbo / Hi / Med / Lo / Min)| L/s| 153/128/94/75/47| 175/139/100/83/5

6

| 183/147/106/86/5

8

| 264/222/167/139/

89

| 264/222/167/139/

89

| 382/303/250/229/

147

| 382/303/250/229/

147

Moisture Removal| L/h| 0.80| 1.00| 1.20| 1.80| 2.10| 2.40| 3.00
Air Flow (Turbo / Hi / Med / Lo / Min)| m3/h| 550/460/340/270/

170

| 630/500/360/300/

200

| 660/530/380/310/

210

| 950/800/600/500/

322

| 950/800/600/500/

322

| 1375/1090/900/82

5/530

| 1375/1090/900/82

5/530

Sound Power Level| dB(A)| 53| 55| 56| 57| 59| 63| 64
Sound Pressure Level @ 1m (Turbo / Hi / Med /

Lo / Min)

| dB(A)| 43.0/38/31.5/30/2

5

| 46.4/39/32.5/30/2

4.5

| 46.7/39/32.5/30/2

4.5

| 47.1/44.5/38/34.5/

28

| 47.1/44.5/38/34.5/

28

| 57.645/39/33.5/29

.5

| 57.645/39/33.5/29

.5

Air Swing Louvres| Direction| 4-way swing

Dimensions

| Dimension (W x H x D)| ****

mm

| 729x200x291| 802x200x295| 802x200x295| 971x228x321| 971x228x321| 1082x234x337| 1082x234x337
Packing (W x H x D)| 965×370×282| 965×370×282| 1010x385x307| 1067×385×312| 1205×400×317| 1205×400×317| 1205×400×317
Net / Gross Weight| kg| 8.0/10.3| 8.5/11.1| 8.5/11.1| 11.1/14.4| 11.1/14.4| 13.3/17.0| 13.3/17.0

Operating Range

| Cooling| ****

°C

| 16～32
Heating| 0～30
Outdoor Unit Model No.| 2.0kW Outdoor| 2.6kW Outdoor| 3.5kW Outdoor| 5.0kW Outdoor| 6.0kW Outdoor| 7.0kW Outdoor| 8.0kW Outdoor
Sound Power Level| ****

dB(A)

| 54| 57| 57| 65| 66| 65| 67
Sound Pressure Level @ 1m| 53| 55.5| 55.5| 59.5| 59.5| 61| 61

Dimensions

| Dimension (W x H x D)| ****

mm

| 765x303x555| 805x330x554| 805x330x554| 890x342x673| 890x342x673| 890x342x673| 890x342x673
Packing (W x H x D)| 887x337x610| 915x370x615| 915x370x615| 995x398x740| 995x398x740| 995x398x740| 995x398x740
Net / Gross Weight| kg| 26.5/28.5| 32.2/34.9| 32.2/34.9| 38.3/41.4| 38.3/41.4| 43.3/46.4| 43.3/46.4

Refrigerant

| Type|  | R32
Charged Volume| kg| 0.62| 0.9| 0.9| 1.26| 1.26| 1.4| 1.4
Pipe Size: Liquid / Gas| mm| 6.35mm(1/4in)

/9.52mm(3/8in)

| 6.35mm(1/4in)/

9.52mm(3/8in)

| 6.35mm(1/4in)/

9.52mm(3/8in)

| 6.35mm(1/4in)/

12.7mm(1/2in)

| 6.35mm(1/4in)/

12.7mm(1/2in)

| 9.52mm(3/8in)/

15.9mm(5/8in)

| 9.52mm(3/8in)/

15.9mm(5/8in)

Maximum Pipe Length| ****

m

| 25| 25| 25| 30| 30| 50| 50
Chargeless Length| 10| 10| 10| 10| 10| 10| 10
Extra Charge for Lengths

˃10m

| g/m| 12| 12| 12| 12| 12| 24| 24
Max. vert. separation| m| 10| 10| 10| 20| 20| 25| 25
Ambient Temperature Limits| Cooling| ****

°C

| 0～50| 0～52| 0～52| 0～50| 0～50| -15～50| -15～50
Heating| -15~24| -15~24| -15~24| -15~24| -15~24| -15~24| -15~24
Capacities tested in accordance with AS/NZS 3823.2, with 5m interconnecting pipe length. With our policy of continuous improvement, we reserve the right to change, or discontinue at any time,

specifications or designs without notice.

Component description

Installation overview

Positioning and clearances – indoor unit

Required clearances

Ensure the following:

• Good air circulation
• Convenient drainage
• Noise from the unit will not disturb others 5 Firm and solid—location will not vibrate
• At least 1 m from other electrical devices (e.g. TV, radio, computer)

DO NOT install:

• Near a doorway
• In a location subject to direct sunlight
• Near any source of heat, steam, or combustible gas
• Near combustible items such as curtains or clothing
• Near any obstacle that may block air circulation

Install the unit on a wall that can support the unit’s weight. If the chosen location cannot support the unit’s weight, or the installation is not done properly, the unit may drop and cause serious injury and damage.
Do not install the unit in a location that may be exposed to combustible gas leaks. If combustible gas accumulates around the unit, it may cause a fire.
For R32 refrigerant models, appliance shall be installed and operated in a room with a floor area larger than 4 m2.
When choosing a location be aware that there needs to be ample room for a hole for the signal cable and refrigerant piping that connects the indoor and outdoor units. The default position
for all piping is to the right side of the indoor unit (while facing the unit). However the unit can accommodate piping to the left and right.

Positioning and clearances – outdoor unit

Required clearances

Ensure the following:

• Good air circulation and ventilation

• Noise from the unit will not disturb others 5 Firm and solid—location will not vibrate 5 Protected from prolonged periods of direct
  sunlight or rain

• Where snow is anticipated, raise the unit above the base pad to prevent ice buildup and cold damage. Mount the unit high enough to be above the average accumulated area snowfall.

DO NOT install:

• Near any source of combustible gas
• In locations exposed to excessive salty air 6 In locations exposed to excessive dust
• Near an obstacle that will block the air inlets and outlets
• Near animals or plants that will be harmed by hot air discharge
• Where it will be exposed to sea wind (salt spray) as this will reduce durability

Special considerations for extreme weather
If the unit is exposed to strong prevailing winds install the unit so that the air outlet fan is at a 90-degree angle to the direction of the wind. If needed, build a barrier in front of the unit to protect it from extremely strong winds. If the unit is exposed to heavy rain or snow, build a shelter above the unit. Be careful not to obstruct airflow around the unit.

Indoor installation

1. Select installation location
   Refer to notes and clearances diagram on p.8.

2. Attach the mounting plate to wall

   • Remove the screw that attaches the mounting plate to the back of the indoor unit.
   • Secure the mounting plate to the wall with the screws provided. Make sure the mounting plate is flat against the wall.
     If the wall is made of brick, concrete, or similar, drill 5 mm diameter holes in the wall and insert sleeve anchors. Secure the mounting plate to the wall by tightening the screws directly to the clip anchors.

3. Drill hole in wall for connective piping
   Determine the location of the hole in the wall based on the position of the mounting plate. Refer mounting plate dimensions on p.21 for the different model types.
   Using a 65 mm or 90 mm core drill, drill a hole in the wall. When drilling make sure to avoid wires, plumbing, and other sensitive components.
   Make sure that the hole is drilled at a slight downward angle, so that the outdoor end of the hole is lower than the indoor end by approximately 5-7 mm. This will ensure the water drains properly.
   Place the protective wall cuff in the hole. This protects the edges of the hole and will help seal it when the installation is finished.

4. Prepare refrigerant piping
   The refrigerant piping is inside an insulating sleeve which is attached to the back of the unit. You must prepare the piping before passing it through the hole in the wall.
   Based on the position of the hole in the wall relative to the mounting plate, choose the side from which the piping will exit the unit. If the hole is behind the unit, keep the knockout panel in place. If the hole is to the side of the indoor unit, remove the plastic knockout panel from that side of the unit. This will create a slot through which your piping can exit. Use needle nose pliers if the plastic panel is too difficult to remove by hand.
   Connect the indoor unit’s refrigerant piping to the connective piping that will join the indoor and outdoor unit. Be careful not to dent or damage the piping while bending away from the unit. Any dents in the piping will affect the unit’s performance.
   Refrigerant piping can exit the indoor unit from four different angles; left- hand side, right-hand side, left rear, and right rear.

5. Connect drain hose
   By default the drain hose is attached to the left-hand side of the unit (when facing the back of the unit). However, it can also be attached to the right- hand side. To ensure proper drainage attach the drain hose on the same side that your refrigerant piping exits the unit. Attach the drain hose extension (purchased separately) to the end of the drain hose.
   Wrap the connection point firmly with Teflon tape to ensure a good seal to prevent leaks. For the portion of drain hose that will remain indoors, wrap it with foam pipe insulation to prevent condensation.
   Remove the air filter and pour a small amount of water into the drain pan to make sure that water flows from the unit correctly. To prevent unwanted leaks plug the unused drain hole with the rubber plug provided.

6. Connect signal and power cables
   Before performing any electrical or wiring work, turn off the main power to the system. WARNING All wiring must be performed in accordance with the wiring diagram located on the back of the indoor unit’s front panel.
   The signal cable enables the communication between the indoor and outdoor units. You must choose the right cable size before preparing it for connection. The size of the power supply cable, signal cable, fuse, and switch is determined by the maximum current of the unit. The maximum current is indicated on the data plate located on the side panel of the unit.

7. The open front panel of the indoor unit.

8. Using a screwdriver, open the wire box cover on the right side of the unit, this will reveal the terminal block.

9. Unscrew the cable clamp below the terminal block and place it to the side.

10. Facing the back of the unit, remove the plastic panel on the bottom left-hand side.

11. Feed the signal wire through this slot, from the back of the unit to the front.

12. Facing the front of the unit, connect the wires according to the wiring diagram, connect u- lug and firmly screw each wire to its corresponding terminal.

13. Make sure every connection is secure, use the cable clamp to fasten the signal cable to the unit. Screw the cable clamp down tightly.

14. Replace the wire cover on the front of the unit, and the plastic panel on the back.

15. Wrap piping and cables
    Before passing the piping, drain hose, and the signal cable through the wall bundle them together to save space, protect and insulate them.
    Bundle the drain hose, refrigerant pipes, and signal cable as shown. Make sure the drain hose is at the bottom of the bundle. Putting the drain hose at the top can cause the drain pan to overflow, which can lead to fire or water damage.
    While bundling, DO NOT intertwine or cross the signal cable with any other wiring.
    Using adhesive vinyl tape, attach the drain hose to the underside of the refrigerant pipes. Using insulation tape, wrap the signal wire, refrigerant pipes, and drain hose tightly together. When wrapping the bundle keep the ends of the piping unwrapped so they can be tested for leaks at the end of the installation process.

16. Mount indoor unit

17. Check the ends of the refrigerant pipes are sealed to prevent dirt or foreign materials from entering the pipes.

18. Slowly pass the wrapped bundle of refrigerant pipes, drain hose, and signal wire through the hole in the wall.

19. Hook the top of the indoor unit on the upper hook of the mounting plate. Check that the unit is hooked firmly by applying slight pressure to the left and right-hand sides of the unit. The unit should not move.

20. Using even pressure, push down on the bottom half of the unit. Keep pushing down until the unit snaps onto hooks along the bottom of the mounting plate. Check that the unit is firmly mounted.
    If the refrigerant piping is already embedded in the wall do the following:

21. Hook the top of the indoor unit on the upper hook of the mounting plate.

22. Use a bracket or wedge to prop up the unit, giving you enough room to connect the refrigerant piping, signal cable, and drain hose.

23. Connect drain hose and refrigerant piping, refer previous pages.

24. Keep the pipe connection points exposed to perform the leak test. After the leak test wrap the connection points with insulation tape.

25. Remove the bracket or wedge that is propping up the unit, and using even pressure, push down on the bottom half of the unit. Keep pushing down until the unit snaps onto the hooks along the bottom of the mounting plate.

Unit is adjustable
Keep in mind that the hooks on the mounting plate are smaller than the holes on the back of the unit. If you find you don’t have enough room to connect embedded pipes to the indoor unit, the unit can be adjusted left or right by 30-50 mm, depending on the model.

Outdoor installation

1. Select installation location
   Refer notes and clearances diagram on p.9.

2. Install drain joint
   Before bolting the outdoor unit in place, you must install the drain joint at the bottom of the unit so condensate can be properly drained away so as not to cause property damage.

3. Anchor outdoor unit
   The outdoor unit can be anchored to the ground or to a wall mounted bracket with M10 bolts. The following is a list of different outdoor unit sizes and distances between their mounting feet. Prepare the installation base of the unit according to the dimensions of the model being installed.

B**
2.6, 3.5 kW| 805 mm| 554 mm| 330 mm| 511 mm| 317 mm
5.0, 6.0, 7.0, 8.0 kW| 890 mm| 673 mm| 342 mm| 663 mm| 354 mm

If you install the unit on the ground or on a mounting platform do the following:

• Mark the positions for the four expansion bolts based on the model.
• Pre-drill holes for the expansion bolts.
• Place a nut on the end of each expansion bolt.
• Hammer the expansion bolts into the pre-drilled holes.
• Remove the nuts from the expansion bolts, and place the outdoor unit on the bolts.
• Put a washer on each expansion bolt, then replace the nuts.
• Using a wrench tighten each nut until snug.

If you install the unit on a wall mounted bracket do the following:

• Mark the position of the bracket holes based on the dimensions of the model.
• Pre-drill the holes for the expansion bolts.
• Place a washer and nut on the end of each expansion bolt.
• Thread expansion bolts through the holes in the mounting brackets, put the mounting brackets in position, and hammer expansion bolts into the wall.
• Check the mounting brackets are level.
• Carefully lift the unit and place the mounting feet on the brackets.
• Bolt the unit firmly to the brackets.
• If applicable, install the unit with rubber gaskets to reduce vibration and noise.

Connect signal and power cables

Before performing any electrical or wiring work, turn off the mains power to the system. All wiring must be performed in accordance with the wiring diagram located on the WARNING
All wiring must be performed in accordance with the wiring diagram located on the inside of the wiring cover.
The signal cable enables the communication between the indoor and outdoor units. You must choose the right cable size before preparing it for connection. The size of the power supply cable, signal cable, fuse, and switch is determined by the maximum current of the unit. The maximum current is indicated on the data plate located on the side panel of the unit.
The outside unit’s terminal block is protected by an electrical wiring cover on the side of the unit.

1. Prepare the cable for connection. Using wire strippers, strip the rubber jacket from both ends of the cable to reveal approximately 40 mm of the wires inside. Strip the insulation from the ends of the wires. Using a crimper, crimp u-lugs on the ends of the wires. While crimping make sure to clearly distinguish the live wire from the other wires.
2. Unscrew the electrical wiring cover and remove it.
3. Unscrew the cable clamp below the terminal block and place it to one side.
4. Connect the wires according to the wiring diagram, and firmly screw the u-lug of each wire to it’s corresponding terminal.
5. After checking to make sure every connection is secure, loop the wires around to prevent rain water from entering into the terminal.
6. Using the cable clamp, fasten the cable to the unit. Screw the cable clamp down tightly.
7. Insulate unused wires with PVC electrical tape. Arrange them so that they do not touch any electrical or metal parts.
8. Replace the wire cover on the side of the unit and screw it in place.

Refrigerant piping connection

WARNING

When connecting refrigerant piping do not let substances or other gases other than the specified refrigerant enter the unit. The presence of other gases or substances will lower the unit’s capacity, and can cause abnormally high pressure in the refrigeration cycle. This can cause explosion and injury.

The length of refrigerant piping will affect the performance and energy efficiency of the unit. Nominal efficiency is tested on units with a pipe length of 5 m—a minimum pipe run of 3 m is required to minimise vibration and excessive noise.

1. Cut pipes
   Be careful not to damage, dent, or deform the pipe while cutting. This will drastically reduce the heating efficiency of the unit. When preparing refrigerant pipes, take extra care to cut and flare them properly. This will ensure efficient operation and minimise the need for future maintenance and repair.

2. Measure the distance between the indoor and outdoor units.

3. Using a pipe cutter, cut the pipe a little longer than the measured distance.

4. Make sure that the pipe is cut at a perfect 90° angle.

5. Remove burrs
   Burrs can affect the airtight seal of the refrigerant pipe connection, they must be completely removed.

6. Hold the pipe at a downward angle to prevent burrs from falling into the pipe.

7. Using a deburring tool, remove all burrs from the cut section of the pipe.

8. Flare pipe ends
   Proper flaring is essential to achieve an airtight seal.

9. After removing burrs from the cut pipe, seal the ends with PVC tape to prevent foreign materials from entering the pipe.

10. Sheath the pipe with insulating material.

11. Place flare nuts on both ends of the pipe. Make sure they are facing in the right direction. You can’t put them on or change their direction after flaring.

12. Remove PVC tape from ends of pipe when ready to perform flaring work.

13. Clamp flare form on the end of the pipe. The end of the pipe must extend beyond the edge of the flare form in accordance with the dimensions below.
    Place flaring tool onto the form. Turn the handle of the flaring tool clockwise until the pipe is fully flared. Remove the flaring tool and flare form, then inspect the end of the pipe for cracks and even flaring.

14. Connect pipes
    When connecting refrigerant pipes be careful not to use excessive torque or to deform the piping in any way. You should first connect the low-pressure pipe, then the high pressure pipe. When bending connective refrigerant piping, the minimum bend radius is 10 cm.
    Connecting pipe to indoor unit

15. Align the center of the two pipes being connected.

16. Tighten the flare nut as tightly as possible by hand.

17. Using a spanner, grip the nut on the unit pipe.

18. While firmly gripping the nut on the unit pipe, use a torque wrench to tighten the flare nut according to the torque values in the table below. Loosen the flare nut slightly then tighten again. DO NOT use excessive torque, excessive force can break the nut or damage the refrigerant piping.

Connecting pipe to the outdoor unit

1. Unscrew the cover from the packed valve on the side of the outdoor unit.
2. Remove protective caps from ends of valves.
3. Align flared pipe end with each valve, and tighten the flare nut as tightly as possible by hand.
4. Using a spanner, grip the body of the valve. Do not grip the nut that seals the service valve. Over-tightening of the flare nut can snap off other parts of the valve.
5. While firmly gripping the body of the valve use a torque wrench to tighten the flare nut according to the torque values above.
6. Loosen the flare nut slightly then tighten again.
7. Repeat steps 3-6 for the remaining pipe.

Evacuation

Air and foreign matter in the refrigerant circuit can cause abnormal rises in pressure, which can damage the unit, reduce its efficiency, and cause injury. Use a vacuum pump and manifold gauge to evacuate the refrigerant circuit, removing any residual gas and moisture from the system. Evacuation should be performed upon initial installation and when the unit is relocated.
Before performing evacuation make sure the connecting pipes between the units, and all the wiring, is connected properly.

1. Connect the charge hose of the manifold gauge to the service port on the outdoor unit’s low pressure valve.

2. Connect another charge hose from the manifold gauge to the vacuum pump.

3. Open the low pressure side of the manifold gauge. Keep the high pressure side closed.

4. Turn on the vacuum pump to evacuate the system.

5. Run the vacuum for at least 15 minutes, or until the compound meter reads -76 cmHg (-105 Pa).

6. Close the low pressure side of the manifold gauge, and turn off the vacuum pump.

7. Wait five minutes, then check that there has been no change in system pressure. If there is a change in system pressure, refer to gas leak checks on next page. If there is no change, unscrew the cap from the high pressure valve and using a hexagonal wrench open the valve by a quarter turn
   (clockwise). Listen for gas exiting the system, then close the valve after five seconds.

8. Watch the pressure gauge for one minute and make sure that there is no change in pressure. The pressure gauge should read slightly higher than atmospheric pressure.

9. Remove the charge hose from the service port. Using a hexagonal wrench, fully open both the high pressure and low pressure valves. Tighten valve caps on all three valves (service port, high pressure, low pressure) by hand. You may tighten it further using a torque wrench if needed.

Adding refrigerant

Some systems require additional charging depending on pipe lengths. The standard pipe length varies according to local regulations. The refrigerant should be charged from the service port on the outdoor unit’s low pressure. The additional refrigerant to be charged can be calculated using the following formula.

Open valve stems gently
When opening valve stems, turn the hexagonal wrench until it hits against the stopper. Do IMPORTANT not try to force the valve to open further.

Electrical and gas leak checks

Confirm the unit’s electrical system is safe and operating properly. Check all flare nut connections and confirm the system is not leaking. Confirm gas and liquid (high and low pressure) valves are fully open.

Electrical safety checks
After installation confirm that all electrical wiring is installed in accordance with the wiring diagrams on the appliance and with local regulations.

Before test run – check grounding work
Measure grounding resistance by visual detection and with a grounding resistance tester. Grounding resistance must be less than 0.1 Ω.

During test run- check for electrical leakage
During the test run, use a multimeter to perform a comprehensive electrical leakage test. If electrical leakage is detected, turn off the unit immediately and call a licensed electrician to find and resolve the cause of the leakage.

Gas leak checks
There are two different methods to check for gas:

Soap and water
Using a soft brush, apply soapy water or liquid detergent to all pipe connection points on the indoor, and outdoor unit. The presence of bubbles indicates a leak.

Leak detector method
If using a leak detector, refer to the device’s instructions for correct usage.
After confirming that all the pipe connection points do not leak, replace the valve cover on the outside unit.

Test run

Perform the test run for at least thirty minutes.

1. Connect power to the unit and press the ON/OFF button on the remote to turn it on.

2. Press the MODE button to scroll through the following functions:

   • COOL select the lowest temperature

   • HEAT select the highest temperature
     Let each function run for five minutes and perform the following checks:

   • No electrical leakage

   • Unit is properly grounded

   • All electrical terminals properly covered

   • Indoor and outdoor units installed correctly

   • All pipe connections do not leak

   • Water drains properly from the drain hose

   • All piping is properly insulated

   • COOL function performs correctly

   • HEAT function performs correctly

   • Indoor unit louvres rotate properly

   • Indoor unit remote operates correctly
     During operation, the pressure of the refrigerant circuit will increase. This may reveal leaks that were not present during your initial leak check. Take time during the test to double-check that all refrigerant pipe connection points do not have leaks.
     During installation and test run you may get an error code. Refer Appendix 2 on pages 22-23 for an error code summary to help diagnose the fault.

3. After the test run is successfully completed and all checks PASS, do the following:

   • Using the remote, return the unit to a normal operating temperature
   • Using insulation tape, wrap the indoor refrigerant pipe connections left uncovered

Ambient temperature below 17 °C
When the ambient temperature is below 17 °C the COOL function won’t work. In this instance you can use the manual control button to test the COOL function. Lift the front panel of the indoor unit and raise it until it clicks. The manual control button is on the right hand side of the unit. Press it two times to select the COOL function. Perform test run as normal.

Installation checklist

Complete the installation checklist below and make sure this is left with the homeowner. Also instruct the homeowner about the use, care, and maintenance of the system, and ensure they understand the safety instructions.

Has all thermal insulation been completed (vapour pipes, liquid pipes, indoor portions of the drain hose extension)?| Condensation
Is the drainage secure?| Water leakage
Electric wires installed correctly?| No cooling or heating, may

cause electrical shock or fire

Wiring in accordance within the specifications?| Operation failure, electrical fire
Inlets / outlets of the indoor and outdoor unit free of any obstructions?| No cooling or heating
Are the stop valves open?| No cooling or heating
Are the pipes designed for use with R32?| Pipe or pipe connection leakage
Leak test pipe connections?| Pipe connection leakage
Air purging carried out?| No cooling or heating
Did appliance test for correct operation?| No cooling or heating
End user aware of operating and safety procedures| Incorrect operation

Appendix 1: Mounting plate dimensions

The Pro Series mounting plates differ to those represented in the dimension diagrams below, they look like this.

2.6 kW and 3.5 kW

5.0 kW and 6.0 kW

7.0 kW and 8.0 kW

Apendix 2: Error code summary

Rinnai.co.nz
Tel: 0800 746 624
http://www.youtube.com/rinnainz http://facebook.com.rinnainz

References

• kgf.cm
• Rinnai NZ - Home Heating - Water Heating - Heat Pumps

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