Rheem SMUL 12 User manual

INSTALLATION INSTRUCTION
FLOOR /CEILING INDOOR UNIT
MODEL: SMUL 12,18,24,30,36,48,60
Read this instructions carefully before installation.

P. 12 P. 01
RHEEM REV 01
Dimemsion

P. 02 P. 11
Detaching the mounting bracket (Hanger Arm) from the unit.
1. Detached the side panel from both side of the unit.
2. Loosen the mounting bolts and remove the hanger arm
3. Prepare to install the hanger arm on the ceiling or wall. Refer to the drawing below and the dimension
of the unit.
4. Drill a hole in the ceiling or wall for the anchor bolts.
5. Insert the anchor bolts into the drilled hole and drive the pin completely with a hammer. (See drawing
below)
TEST RUNNING
RUN TEST:
* Check electrical main wire “ voltage”.
* Run the air conditioner for 15 minutes or more. Check the electrical current with ammeter
and compare with the specification.
Ammeter
wire

P. 10 P. 03
6. Mount the hanger arm into the anchor bolt with washer, spring washer and nut.
7. Prepare the mounting bolts on the unit as shown below.
8. Hang the unit on the hanger arm by sliding backward (See figure below). Securely tighten the mounting
bolts on both sides.
Ceiling mounted
Wall mounted
NOTE:
Make sure that the holes for refrigerant piping and drainpipe were prepared before mounting the unit.
ELECTRICAL WIRE DIAGRAM
* Wiring as shown in electrical wiring diagram.
* Use copper conduction only.
* How to tighten screw on terminal block.
1.Bare the ends of electric wire.
2.After retaining the wire. Check that all terminal
screws are firmly tightened.
REMARK: -
-ELECTRICAL WIRE SIZE 2.5 MM
2
.
-FUSE 3 AMP FOR P.C. BOARD
FAN
MOTOR 2
TO CONTACTOR
24 V ONLY
BLACK GRAY 4
FAN
MOTOR 1
M2
ROOM TEMP. SENSOR
FREEZE SENSOR
STEP MOTOR
C1/:WIRING/MILLER/S256
DISPLY
SWING
MOTOR
TRANSFORMER
FUSE
CONTROL
UNIT
NL1
Comp
LINE-C
MED LOW HIGH
24 V
SWP
GREEN-
YELLOW
LINE-RED
NEUTRAL-BLACK
WIRING DIAGRAM FANCOIL UNIT S256
POWER SUPPLY 220~240V~,50Hz/60Hz
CAPACITOR CAPACITOR
1POWER SUPPLY
GRAY 2
3

P. 04 P. 09
LOCATION FOR INDOOR UNIT
Select the location the indoor unit with the following consideration:
1.The front of the air injet and outlet shall be free from any obstration. The outlet air
should flow out freely.
2. The wall where the unit is to be mounted should be stiff enough not to resonant
and produce noise.
3. The place should allow easy access to install the copper tube pipe to the outdoor.
4. Ensure the clearance on every side of the indoor unit to conform to figure below.
5. From the floor the height should be more than the eye level.
CAUTION : Avoid installing the unit form direct sunlight.
A
IR PURGING AND CHECK OF PIPE LEAKAGE
The purpose of air purging is to get rid of -- Use hexagonal wrench to open both
moisture and air in the system, other wise high pressures, low –pressure valve to
moisture and air may cause and the end (counter clockwise).
ineffectiveness of compressor which directly Tighten the blank cap of three-way
effects to the cool air.
Valve.
PURGING BY USING VACUUM: -- Cover indoor unit joint with pipe
After tighten flare nut between indoor and insulation and 4 plastic bands prevent
Outdoor unit. Condensation at joint.
•Remove the blank cap of three-way
•Valve by using torque wrench .Check
Both high pressure and low-pressure
Valve are in closed condition.
•Remove the nut of the service port.
•Connect gauge into the service port.
•Connect gauge into the vacuum pump
•Vacuum until gauge indicate at 30-
Inch mercury pressure.
•Remove gauge. Tighten up the nut of
service port.
GAS LEAKING CHECK:
-- Check leakage by apply soapsuds to
Ever connection and inspect carefully
after checking wipe them off completely.

P. 08 P. 05
LIQUID PIPE AND DRAIN PIPE
* Drain pipe should be above ground
and the end off the pipe does not dip
into water all pipes must be restrained
wall by saddled.
IF THE OUTDOORS UNIT IS INSTALLED
LOWER THAN INDOOR UNIT
* Taping method ,taping from lower part
to upper
* All pipes are bound together by tape
and restrained to the wall by saddles.
IF THE OUTDOORS UNIT IS INSTALLED
HIGHER THAN INDOOR UNIT
* Taping should done from lower to upper part.
* All pipes are bound and taped together and trapped
the pipes to prevent water returning to the room.
(see picture)
* Restrain all pipes to the wall with saddles.
REFRIGERANT PIPING WORK
1. Selection of copper pipe for gas pipe and liquid pipe as informed in specific table(see pipe table)
2. For dust moisture protection , before assembly the pipe and its insulation, both end of the pipe
must be coverage.
3. Avoid pipe bending as mush as possible. If it is necessary, the bending radius must be more
than 3 or 4 cm.
Gas pipe and liquid pipe insulation depending upon copper pipe size and the insulation thickness=3/8’’
4. the connection indoor unit and outdoor unit.
•Unscrew flare nut for releasing pressure gas in indoor unit .If there is no high-pressure
gas blowing out, it is the signal of leaking indoor unit.
•Fit flare nut with liquid pipe. Flaring the pipe ‘s end with fare tool.
Connecting Wire
Liquid Pipe
Heat pump only
Piping tape
Drain pipe 1/2"
Gas pipe
PIPE LIMITATION AMD RECOMENATION FOR CHARGING R-22
BTU/HR PIPNG BETWEEN INDOOR & OUTDOOR UNIT PIP SIZE OD. EXTRA CHARGING R-22
HEIGHT DIFFERENT PIPNG ( INCH.) FOR PIPE LENGTH
H(CON.ABOVE H(CON.UNDER LENGTH MORE THAN 5 M
FANCOIL) FANCOIL) (ONE WAY)
LIQUID
GAS
(GRAM/M)
10,000-12,000 15 M. 10 M. 20 M. 1/4 1/2 30
16,000-33,000 20 M. 15 M. 30 M. 3/8 5/8 60
36,000-48,000 25 M. 20 M. 35 M. 3/8 3/4 70
25 M. 20 M. 55 M. 3/8 7/8 80
56,000-60,000 25 M. 20 M. 35 M. 1/2 3/4 120
25 M. 20 M. 50 M. 1/2 7/8 120
25 M. 20 M. 60 M. 1/2 1-1/8
120

P. 06 P. 07
•Drain hose outlet from indoor unit can be manage in 3 style ::rear ,left and right of the indoor unit
•Tighten both fare nuts into gas pipe and liquid pipe at the indoor unit with two holding spanners.
5. Condense drain
•Be sure the unit reasonably level and pitched toward the drain to ensure proper grange.
•Piping material
(a) oft Vinyl chloride Pipe 22 MM. Nominal pipe size.
(b) Hard Vinyl chloride (PVC) Coupling 22 mm. Nominal pipe size.
•Connect the soft/hard vinyl chloride pipe to the coupling, see fig.8
•The indoor unit uses gravity to drain: Therefore the piping outside the unit should slope downward.
•“IMPORTANT “ Avoid draining as shown in fig. 9.
6. Refrigerant piping
•Connections to the indoor unit are flared connection.
1. Make flared joints for both suction and liquid lines.
2. Ensure tube and fittings are in line with one another before tightening nut to provide concentric
seating of tube on prevent leakage.
•Brazing should be performed with a constant purge of nitrogen trough the piping. This to
Keep inside of tube clean.
•Insulate suction and liquid and liquid line separately to prevent sweating.
FIG 8
FIG 9
PIPE PREPARATION
-PIPE & ELECTRICAL WIRE CUTTING
* Use cutting tools easily found in the market.
* Measure precisely both outer & inner pipe.
* Provide Alltel bit longer pipe than the measurement.
* Wire must be 1.5 m. longer than the refrigerant tube.
-REAMING
* Clean inside of the inner refrigerant tube.
* While reaming, the tube end must be on the top
of the reamer to prevent any dust going back into
the tube.
-FLARING THE PIPE FND
* Flare both ends of the pipe with flaring kit by
fitting the flare nut on the pipe before flaring.
Set the die on the pipe so that pipe end is
0.5 mm. Above top of the die .Check if the pipe
end is even and perfectly round.
-WIRE CONNECTION AND TAPE COVERING
(See the picture on the right hand side)
Cutting Tool
Rough Cut
Right
Sloped Cut
Wrong
Refrigerant Tube
Reamer
Up side
down position
Uneven
Thickness
CrackedPoor
Skin
Uneven
Slope
Low Pressure Refrigerant Tube
30-40 mm.
To Indoor Unit To Outdoor Unit