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SM Series Heat Pump
GENERAL DESCRIPTION
SM Series Water-to-Air Heat Pumps provide the best
combination of performance and efficiency available. All
units are performance certified to American Heating and
Refrigeration Institute (AHRI) ISO Standard 13256-1. All
SM Water-to-Air Heat Pumps conform to UL1995
standard and are certified to CAN/CSA C22.2 No 236 by
Intertek-ETL. The Water-to-Air Heat Pumps are designed
to operate with entering fluid temperature between
20°F to 80°F in the heating mode and between 40°F to
110°F in the cooling mode for continuous operations.
Heat Pump operating under extreme conditions will
have limitations on air/fluid flow rates and/or
temperatures.
Please refer to Bosch SM series Engineering
Submittal Sheet for detailed information on extreme
operating conditions.
50° F Minimum Entering Water Temperature (EWT)
is recommended for well water applications with
sufficient water flow to prevent freezing. Antifreeze
solution is required for all closed loop applications
and EWT below 45°F. Cooling Tower/Boiler and
Geothermal applications should have sufficient
antifreeze solution to protect against extreme
conditions and equipment failure. Frozen water coils
are not covered under warranty. Other equivalent
methods of temperature control are acceptable.
SM Series Water-to-Air Heat Pumps are available in
Vertical (VT), Horizontal (HZ) and Counter-Flow (CF)
configurations. HZ units can be field configured from
end blow to straight or vice versa using a field installed
accessory kit.
Several factory installed options are available: Electric
Heat, Heat Recovery Package, Smart Start Assist,
Auxiliary Pump Relay, and Comfort Alert Module. Electric
Heat and Smart Start Assist are also available as field
installed accessories. See Pg# 24 for more details.
Safety devices are built into each unit to provide the
maximum system protection possible when properly
installed and maintained. Each unit has an externally
mounted LCD status display, allowing unit diagnosis
without opening the cabinet.
Basic Horizontal unit layout and connections are shown
in Figure #3. Refer to Dimensional Drawings for further
detail, as well as Vertical and Counter Flow unit details.
Pg# 55 through Pg# 58
Revised 07-17
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Figure # 3
[1] LED Unit Diagnostic Display
[2] Air handler access panel
[3] Condensing section access panel
[4] Condensate drain connection
[5] Water connection Swivel type (VT/CF-Field installed
HZ factory installed)
Refer to piping on page #15
[6] Heat Recovery water connection (Optional)
[7] Heat Recovery disconnect switch (Optional)
[8] Electrical connection knockout
[9] Electric Heat electrical connection knockout
(Optional)
[10] Blower outlet (Based on discharged air
configuration)
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