Gree GRH120DB-K6NA1A Service Manual page 28

gasket.
3.Examine the roof opening size, if the opening is small than
400x400mm, the opening must be enlarged.
CASE B.
If a roof vent opening is not used,a new opening(see Fig.2)will be
cut into the vehicl roof.A matching opening will also have to be cut
into the interior vehicle ceiling,be careful when cutting the ceiling
opening because if the ceiling opening is carpeted,snagging could
occur. After the opening in the roof and interior ceiling are the
correct size,a framed support structure must be placed between the
exterior roof top and interior ceiling.The reinforced framed structure
must follow the follwing guidelines:
1.It must be capable of supporting both the weight of the roof top air
conditioner and the interior ceiling assembly.
2.It must be capable of holding the roof outer surface and interior
ceiling apart and supporting them, so that when the roof top air
conditioner and ceiling assembly are bolted together,no collapsing
occurs. A typical support frame is shown in Fig. 2.
3.There must be an opening through the frame for the power supply
wiring. Route the supply wiring through the frame at the same time
the support frame is being installed.
Fig. 2
Installation method for mounting plat
If the roof already has a 400x400mm opening.
Select the installation position for the recreational vehicle air
conditioner
This mounting plat of switchover opening is applicable for Gree
recreational vehicle air conditioner.
The opening size of installation port on the top of the vehicle must
be 400×400mm.
Operation method:
1.Eliminate the sundries around the installation port on the top of
the vehicle and keep the installation surface flat;
2.Check whether there are holes or grooves on surface of
installation position. If yes, conduct the sealing treatment to prevent
water leakage;
3.Fill the groove on the surface where the mount-ing plate is
contacting the top part of the vehicle with the unhardened sealant
(the maximum thickness is 1cm); When the mounting plat is
installed on the top of vehicle, fill the sealant in the gap between
the mounting plat and the vehicle roof. The mounting plat should be
tightly sealed with the roof of the vehicle to prevent water leakage.
4.Install it into the opening on the top of the vehicle according to the
indicate direction by the arrow (the direction of arrow should be the
same with the head of the vehicle).
Fig. 3
26
Hole for
Wires
CAUTION
1. The roof top air conditioner must be mounted on a level plane
from front to rear and side to side when the vehicle is parked on a
level plane. Fig. 4 shows maximum allowable degrees that the unit
can be mounted above or below level.
2.If the roof of the vehicle is sloped (not level) such that the roof top
air conditioner cannot be mounted within the maximum allowable
degree specifications, an exterior leveling shim will need to be
added to make the unit level. A typical leveling shim is shown in Fig.
5.
3.Once the roof top air conditioner has been leveled, some
additional shimming may be required above the interior ceiling
assembly. The roof top air conditioner and the interior ceiling
assembly must be square with each other before they are secured
together.
4.After the mounting hole area is properly prepared, remove the
carton and shipping pads from around the roof top air conditioner.
Carefully lift the unit on top of the vehicle. Do not use the outer
plastic shroud for lifting. Place the roof top air conditioner over the
prepared mounting hole.
5.The front section of outdoor unit of air conditioner must be in the
same direction as the vehicle,which is useful for reducing wind
resistance.
Note: Try you best to put the unit on the horizontal surface for
operation. The unit can only operate for a short time at the maximum
sloping angle of 5º for preventing water leakage.
Above Level 5° Max
Below Level 0° Max
Above or Below
Level 5° Max
Fig. 5
Height Varies to Make Unit Level
NOTE:AIR CONDITIONER DIMENSIONS (ROOF OF UNIT)
Fig. 6
(588)
720
Level
Level
Level
Level
Fig.4
1077
400
89
400x400
OPENING
Unit:mm
Installation and Maintenance