Kaysun KEM-90, Owners & Installation Manual

08

6.3 Installation foundation

6.3.1 Base structure

Outdoor unit base structure design should take account of the 

following considerations:
1) A solid base prevents excess vibration and noise. Outdoor 

unit bases should be constructed on solid ground or on 

structures of sufficient strength to support the units’ weight.

2) Bases should be at least 200mm high to provide sufficient 

access for installation of piping.Snow protection should also be 

considered for the base height.

3) Either steel or concrete bases may be suitable.

4) A typical concrete base design is shown in Fig. 6-5. A typical 

concrete specification is 1 part cement, 2 parts sand and 4 

parts crushed stone with steel reinforcing bar. The edges of the 

base should be chamfered

5) To ensure that all contact points are equally secure, bases 

should be completely level. Base design should ensure that the 

points on the units’ bases designed for weight-bearing support 

are fully supported.

ŐPP

Ő

200mm

Rubber anti-vibration pads

Concrete base
h≥200mm

Solid ground / surface

Fig.6-6  Front view of base structure

Outdoor unit

6.3.2 Location drawing of installation 

foundation of the unit: (unit: mm)

1) If the unit is located so high that it is inconvenient for 

maintenance personnel to conduct maintenance, the suitable 

scaffold can be provided around the unit.

2) The scaffold must be able to bear the weight of maintenance 

personnel and maintenance facilities.

3) The bottom frame of the unit is not allowed to be embedded 

into the concrete of installation foundation.

4) A drainage ditch should be provided to allow drainage of 

condensate that may form on the heat exchangers when 

the units are running in heating mode. The drainage should 

ensure that condensate is directed away from roadways and 

footpaths, especially in locations where the climate is such that 

condensate may freeze.

Inlet and outlet 

pipe side

Drainage channel

Electric control 

box side

Anchor bolt

Fig. 6-7  Top view of schematic diagram of installation 

dimension of KEM-30 DRS4.1 KH

(unit: mm)

Electric control 

box side

Fig. 6-8  Top view of schematic diagram of installation  

dimension of KEM-60 DRS4.1 KH

Inlet and outlet 

pipe side

Drainage channel

Anchor bolt

(unit: mm)

Fig. 6-9  Top view of schematic diagram of installation  

dimension of KEM-90 DRS4 KH

Electric control 

box side

Inlet and outlet 

pipe side

Drainage channel

Anchor bolt

(unit: mm)

6.4 Installation of damping devices

6.4.1 Damping devices must be provided 

between the unit and its foundation.

By means of the 015mm diameter installation holes on the 

steel frame of the unit base, the unit can be fastened on 

the foundation through the spring damper. See Fig.6-6,6-7 

(Schematic diagram of installation dimension of the unit) for 

details about center distance of the installation holes. The 

damper does not go with the unit, and the user can select 

the damper according to the relevant requirements. When 

the unit is installed on the high roof or the area sensitive 

to vibration, please consult the relevant persons before 

selecting the damper.

6.4.2 Installation steps of the damper

Step 1. Make sure that the flatness of the concrete 

foundation is within ±3mm, and then place the unit on the 

cushion block.
Step 2. Raise the unit to the height suitable for 

installation of the damping device.
Step 3. Remove the clamp nuts of the damper. Place the 

unit on the damper, and align the fixing bolt holes of the 

damper with the fixing holes on the unit base.
Step 4. Return the clamp nuts of the damper to the fixing 

holes on the unit base, and tighten them into the damper.
Step 5. Adjust the operational height of the damper base, 

and screw down the leveling bolts. Tighten the bolts by 

one circle to ensure equal height adjustment variance of 

the damper.
Step 6. The lock bolts can be tightened after the correct 

operational height is reached.