Sinclair AST-24AI, Service Manual, Page: 35 / 68

Service Manual
31
Installation and Maintenance
Handle
Indoor unit connection
L
L N
N 3 N(1) 2
black brown brown blue blue
(black)
yellow-
green
yellow-
green
POWER
2. Remove the screw cap of valve and aim the pipe joint at the
bellmouth of pipe.(As show in Fig.20)
3. Pretightening the union nut with hand.
4. Tighten the union nut with torque wrench by referring to the
sheet below.
Step four: connect indoor and outdoor pipes
1. Remove the screw on the right handle of outdoor unit and
then remove the handle.(As show in Fig.19)
union nut
pipe joint
gas pipe
liquid pipe
liquid valve
gas valve
foot holes
foot holes
Fig.18
Fig.19
Fig.20
Fig.21
.
Fig.17
Step two: install drain joint (only for cooling and heating
unit)
1. Connect the outdoor drain joint into the hole on the chassis,
as shown in the picture below.
2. Connect the drain hose into the drain vent.(As show in
Fig.17)
Step three: fix outdoor unit
1. Place the outdoor unit on the support.
2. Fix the foot holes of outdoor unit with bolts.(As show in
Fig.18)
chassis
outdoor drain joint
drain hose
drain vent
Hex nut diameter(mm) Tightening torque(N m)
Φ6(1/4") 15~20
Φ9.52(3/8") 30~40
Φ12(1/2") 45~55
Φ16(5/8") 60~65
Φ19(3/4") 70~75
Step five: connect outdoor electric wire
1. Remove the wire clip; connect the power connection wire to
the wiring terminal according to the color; fix them with screws.
(As show in Fig.21)
2. Fix the power connection wire with wire clip (only for cooling
and heating unit).
1.After tightening the screw, pull the power cord slightly to
check if it is firm.
2. Never cut the power connection wire to prolong or shorten
the distance.
Note:
1.The through-wall height of drain hose shouldn't be higher
than the outlet pipe hole of indoor unit.(As show in Fig.23)
2.Slant the drain hose slightly downwards. The drain hose
can't be curved, raised and fluctuant, etc. (As show in Fig.24)
3.The water outlet can't be placed in water in order to drain
smoothly.(As show in Fig.25)
Step six: neaten the pipes
1. The pipes should be placed along the wall, bent reasonably
and hidden possibly. Min. semidiameter of bending the pipe is
10cm.
2. If the outdoor unit is higher than the wall hole, you must set
a U-shaped curve in the pipe before pipe goes into the room,
in order to prevent rain from getting into the room. (As show in
Fig.23)
Fig.22
Fig.23
Note:
the drain hose can't
raise upwards.
The drain hose
can't be fluctuant
The drain
hose can't
be fluctuant
The water outlet
can't be fluctuant
Fig.24
Fig.25
The water
outlet can't
be placed
in water
handle
valve cover
U-shaped curve
Wall
Drain hose