78 | Fitting
UNIMAT6 720 807 794 (2013/04)
10.5.5 Boiler foundation
The UNIMAT UT-L boiler is equipped with robust base
supports consisting of channel sections for even load
distribution. If a foundation is planned, it should not go
as far as the side walls of the boiler room because of this
sound insulation.
If suitable boiler mounts are planned for sound
insulation ( page 77), ensure the foundation is level to
within ± 1 mm. This guarantees an even load on the
boiler mounts.
The following requirements of the foundation must be
met:
• Ensure that the floor of the installation area is
perfectly even (tolerance with reference to
DIN 18202) and has sufficient load-bearing capacity.
• Cover any floor channels and provide drainage
facilities.
• When calculating the load-bearing capacity of the
foundation, take account of the maximum operating
weight of the components concerned. When
determining the operating weight, take account of
additional components (e.g. control panel, burner,
silencer, flues, etc.) and include their weight. The
operating weight is the weight of the components
when filled.
• Measure the operating weight of the boiler at the
front and back feet of the foundation. Please note that
the back boiler foot (seen from the burner side) is
designed as a fixed point on the longitudinal support.
The front boiler foot is designed as a movable bearing,
i.e. the boiler expands towards the front when
heating up.
• Every component must be levelled.
• If separation is required between the installation
space and the system for sound insulation, place
sound insulating strips below before installing the
system.
• If the boiler or system components are installed on a
support base, use suitable spring systems as
supports and to absorb operational vibrations.
Fig. 55 Boiler foundation for UNIMAT UT-L boilers
UNIMAT UT-L boiler Foundation Base frame Channel section
Length
L
1
Width
B
1
Length
L
2
Width
B
2
Height
H
Width
B
3
Boiler size Boiler size [mm] [mm] [mm] [mm] [mm] [mm]
UT-L 1 – 1850 810 1750 710 120 55
UT-L 4 UT-L 2 2200 1010 2100 910 120 55
UT-L 10 UT-L 6 2450 1010 2350 910 120 55
UT-L 14 UT-L 8 2660 1030 2560 930 160 65
UT-L 18 UT-L 12 3130 1230 3030 1130 160 65
UT-L 24 UT-L 16 3160 1250 3060 1150 200 75
UT-L 28 UT-L 20 3510 1250 3410 1150 200 75
UT-L 30 UT-L 22 3920 1350 3820 1250 200 75
UT-L 34 UT-L 26 4020 1610 3920 1510 220 80
UT-L 40 UT-L 32 4380 1610 4280 1510 220 80
UT-L 42 UT-L 36 4580 1620 4480 1520 240 85
UT-L 46 UT-L 38 4750 1710 4650 1610 240 85
UT-L 50 UT-L 44 5150 1730 5050 1630 280 95
UT-L 54 UT-L 48 5420 1990 5320 1890 280 95
UT-L 58 UT-L 52 6100 1990 6000 1890 280 95
UT-L 60 UT-L 56 6490 2200 6390 2100 320 100
UT-L 64 UT-L 62 6890 2200 6790 2100 320 100
Table 39 Boiler foundation dimensions for UNIMAT UT-L boilers; the dimensions specified are recommended values and
may vary from system to system.
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