Bosch SM070 Specifications Page 27

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Mounting Vertical Units | 27SM Series Heat Pump
6 720 220 406 (2013/9)Revised 08-13
MOUNTING VERTICAL UNITS
Vertical units should be mounted level on a
vibration absorbing pad slightly larger than the
base to minimize vibration transmission to the
building structure. It is not necessary to anchor the
unit to the floor. (Figure #92).
Figure # 92
MOUNTING HORIZONTAL UNITS
While horizontal units may be installed on any level
surface strong enough to hold their weight, they
are typically suspended above a ceiling by
threaded rods. The manufacturer recommends
these be attached to the unit corners by hanger
bracket kits. The rods must be securely anchored
to the ceiling. Refer to the hanging bracket
assembly and installation instructions for details.
Plumbing connected to the heat pump must not
come in direct contact with joists, trusses, walls,
etc. Some applications require an attic floor
installation of the horizontal unit. In this case the
unit should be set in a full size secondary drain pan
on top of a vibration absorbing mesh.
The Secondary drain pan prevents possible
condensate overflow or water leakage damage to
the ceiling.
The secondary drain pan is usually placed on a
plywood base isolated from the ceiling joists by
additional layers of vibration absorbing mesh. In
both cases, a 3/4”drain connected to this
secondary pan should be run to an eave at a
location that will be noticeable.
If the unit is located in a crawl space, the bottom
of the unit must be at least 4” above grade to
prevent flooding of the electrical parts due to
heavy rains.
CONDENSATE DRAIN
Figure # 93
A drain line must be connected to the heat pump
and pitched away from the unit a minimum of 1/8”
per foot to allow the condensate to flow away from
the unit.
This connection must be in conformance with local
plumbing codes. A trap must be installed in the
condensate line to insure free condensate flow.
A vertical air vent is sometimes required to avoid
air pockets. The length of the trap depends on the
amount of positive or negative pressure on the
drain pan. A second trap must not be included.
On VT and CF Units Condensate Drain pan is
internally sloped. There is no internal P-Trap.
Horizontal units installed above the ceiling
must conform to all local codes. An auxiliary
drain pan if required by code, should be at
least four inches larger than the bottom of
the heat pump.
VIBRATION
PAD FULL SIZE
HZ Units Condensate Drain pan is NOT
internally sloped.
Horizontal (HZ) units must be installed
pitched toward the Condensate Drain
Connection 1/8” per foot.
When converting unit from left-hand return to
right-hand return, condensate drain connection
must be relocated. Refer to Pg#20.
HZ Heat Pump Drain Pan is not internally
sloped.
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