Rinnai 22
Split AC IM
Outdoor Unit
Installation
Page 28
Step 4: Connect signal and power cables
The outside unit’s terminal block is protected by
an electrical wiring cover on the side of the unit.
A comprehensive wiring diagram is printed on
the inside of the wiring cover.
WARNING
1. Prepare the cable for connection:
PAY
ATTENTION TO LIVE WIRE
While crimping wires, make sure you clearly
distinguish the Live (“L”) Wire from other wires.
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.
2. Unscrew the electrical wiring cover and remove it.
3. Unscrew the cable clamp below the terminal
block and place it to the side.
4. Connect the wire according to the wiring
diagram, and firmly screw the u-lug of each
wire to its corresponding terminal.
5. After checking to make sure every connection is
secure, loop the wires around to prevent rain
water from flowing into the terminal.
6. Using the cable clamp, fasten the cable to the
unit. Screw the cable clamp down tightly.
1. Remove the wire cover from the unit by
loosening the 3 screws.
2. Dismount caps on the conduit panel.
3. Temperarily mount the conduit tubes(not
included) on the conduit panel.
4. Properly connect both the power supply and
low voltage lines to the corresponding
terminals on the terminal block.
5. Ground the unit in accordance with local codes.
6. Be sure to size each wire allowing several inches
longer than the required length for wiring.
7. Use lock nuts to secure the conduit tubes.
BEFORE PERFORMING ANY ELECTRICAL
OR WIRING WORK, TURN OFF THE MAIN
POWER TO THE SYSTEM.
WARNING
ALL WIRING WORK MUST BE PERFORMED
STRICTLY IN ACCORDANCE WITH THE
WIRING DIAGRAM LOCATED INSIDE OF
WIRE COVER OF THE OUTDOOR UNIT .
In North America
Cover
Screw
G
Wire Cover
Over 1.57in.(40mm)
Terminal block
Conduit panel
Connecting cable
Power supply cord
Please select the appropriate through-hole according
to the diameter of the wire.
Three size hole: Small, Large, Medium
When the calbe is not fasten enough, use the
buckle to prop it up , so it can be clamped tightly.
Buckle
NOTE:
If the cable clamp looks like the following,
please select the appropriate through-hole according
to the diameter of the wire.
USE THE RIGHT CABLE
Please choose the right cable refer to
“
Cable types
” in page 22.
a. Using wire strippers, strip the rubber
jacket from both ends of cable to reveal
about 40mm (1.57in) of the wires inside.
b. Strip the insulation from the ends of the wires.
c. Using a wire crimper, crimp u-lugs on the
ends of the wires.
CHOOSE THE RIGHT CABLE SIZE
The size of the power supply cable, signal cable,
fuse, and switch needed is determined by the
maximum current of the unit. The maximum
current is indicated on the nameplate located
on the side panel of the unit.
NOTE:
In North America, please choose the right
cable size according to the Minimum Circuit
Ampacity indicated on the nameplate of the unit.
Wiring of Terminal Block
NOTE: Please choose the right cable size
according the Minimum Circuit Ampacity
indicated on the nameplate of the unit.
Page 29
Note on Pipe Length
Connection Instructions – Refrigerant Piping
Step 1: Cut pipes
When preparing refrigerant pipes, take extra
care to cut and flare them properly. This will
ensure efficient operation and minimize the
need for future maintenance.
1. Measure the distance between the indoor
and outdoor units.
Refer to the table below for specifications on the maximum length and drop height of piping.
When connecting refrigerant piping,
do not
let substances or 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.
2.
Using a pipe cutter, cut the pipe a little longer
than the measured distance.
3.
Make sure that the pipe is cut at a perfect 90°
angle.
Oblique Rough
Warped
90°
DO NOT DEFORM PIPE
WHILE CUTTING
Be extra careful not to damage, dent, or
deform the pipe while cutting. This will
drastically reduce the heating efficiency
of the unit.
Maximum Length and Drop Height of Refrigerant Piping per Unit Model
Model
Capacity (BTU/h)
Max. Length (m)
Max. Drop Height (m)
R410A,R32 Inverter
Split Air Conditioner
R22 Fixed-speed
Split Air Conditioner
R410A, R32 Fixed-speed
Split Air Conditioner
< 15,000
< 18,000
25 (82ft)
10 (33ft)
10 (33ft)
5 (16ft)
≥
15,000 and < 24,000
30 (98.5ft)
20 (66ft)
20 (66ft)
≥
24,000 and < 36,000
50 (164ft)
25 (82ft)
≥
21,000 and < 35,000
10(33ft)
≥
18,000 and < 21,000
≥
18,000 and < 36,000
15 (49ft)
8(26ft)
8(26ft)
< 18,000
20 (66ft)
25 (82ft)
10(33ft)
Refrigerant piping
Connection
Refrigerant Piping Connection
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 meters (16.5ft)( In North America, the standard pipe
length is 7.5m (25’)). A minimum pipe run of 3 metres is required to minimise vibration & excessive noise.
In special tropical area, for the R290 refrigerant models, no refrigerant can be added and the maximum
length of refrigerant pipe should not exceed 10 meters(32.8ft).
OUTDOOR INSTALLATION
Summary of Contents for HINRP20M
Page 31: ...Rinnai 31 Split AC IM NOTES ...