SM AH Series Heat Pump AH Model Nomenclature | 3 AH MODEL NOMENCLATURE AV X X L T A SERIES FAN MOTOR OPTIONS A - Constant Airflow ECM SIZE DISCHARGE AIR CONFIGURATION T - Top (AV only) S - Straight (AH only) E - End (AH only) RETURN AIR CONFIGURATION L - Left...
4 | INITIAL INSPECTION SM AH Series Heat Pump MOVING AND STORAGE To avoid equipment damage, DO NOT use If the equipment is not needed for immediate these units as a source of heating or cooling installation upon its arrival at the job site, it should during the construction process.
SM AH Series Heat Pump Installation | 5 Condensing Section If the condensing section is installed in a location where ambient temperatures can fall below Locate the condensing section in an area that freezing, some form of freeze protection should be provides sufficient room to make water and employed such as anti-freeze.
6 | CONDENSATE DRAIN SM AH Series Heat Pump Mounting Horizontal Air Handler Units CONDENSATE DRAIN While horizontal units may be installed on any level If equipped with float style condensate overflow surface strong enough to hold their weight, they switch, final adjustment must be made in the are typically suspended above a ceiling by field.
SM AH Series Heat Pump DUCT SYSTEM | 7 DUCT SYSTEM ELECTRICAL A supply air outlet collar and return air duct flange Always disconnect power to the unit before are provided on all units to facilitate duct servicing to prevent injury or death due to connections.
8 | Electrical SM AH Series Heat Pump Low Voltage Control Wiring Each model has a number of heater sizes available. Refer to Figure #7 for heater package compatibility The SM series units incorporate the ECM variable with specific units, model nomenclature and elec- speed fan motor and control interface board.
SM AH Series Heat Pump Electrical | 9 Units supplied with internal electric heat require Packaged heat pumps are equipped with two (2) separate power supplies: one for the unit detachable Thermostat connectors. These compressor and one for the electric heater connectors are located in different locations elements, blower motor and control circuit.
10 | Electrical SM AH Series Heat Pump ECM Interface Board If the thermostat is provided with a malfunction light powered off of the hot (R) side of the transformer, then the thermostat malfunction light connection should be connected directly to the (ALR) contact on the unit’s UPM board.
SM AH Series Heat Pump Sequence of operation | 11 Heating Mode Just above and to the right of the thermostat connection block are four sets of jumper pins Heating operates in the same manner as cooling, labeled ADJ, DELAY, HEAT and COOL. The ADJ set but with the reversing valve de-energized.
12 | Refrigerant Lines SM AH Series Heat Pump • Oil is continually being circulated with the • Connect and braze lines to service valves on refrigerant so, oil return to the compressor is the condensing section. always a consideration in line sizing. Suction WARNING: Always wrap the body of the lines on split system heat pumps are also hot service valve with a wet towel or apply some...
SM AH Series Heat Pump Charging the system | 13 CHARGING THE SYSTEM • If the calculated Equivalent Line Length falls between the lengths shown on Table 3, use Do not overcharge the system. Charge all systems tubing sized for the next longer length. by weight as determined from Figure #15 and the •...
14 | SYSTEM CHECKOUT SM AH Series Heat Pump SYSTEM CHECKOUT INITIAL START-UP After completing the installation, and before 1. Make sure all valves in heat recovery water energizing the unit, the following system checks piping system are open. NEVER OPERATE HR should be made: PUMP DRY.
SM AH Series Heat Pump | 15 5. Periodic lockouts almost always are caused by air or water flow problems. The lockout (shutdown) of the unit is a normal protective measure in the design of the equipment. If continual lockouts occur call a mechanic immediately and have them check for: water flow problems, water temperature problems, air flow problems or air temperature problems.
Auxiliary Heat Unit Make __________________________________ Model Number: ______________________________ Serial Number _____________________________ Max Fuse Size (Amps) _______________________ Volts / Amps _______________________________ Bosch Group Entering Air Temperature _____________________ 601 NW 65th Court Leaving Air Temperature ______________________ Fort Lauderdale, FL 33309 MAIL TO: Phone: (866) 642-3198 Bosch.Fhp.TechSupport@us.bosch.com...
22 | Troubleshooting SM AH Series Heat Pump TROUBLESHOOTING Unit Troubleshooting Problem Possible Cause Checks and Correction ENTIRE UNIT Power Supply Off Apply power, close disconnect DOES NOT RUN Blown Fuse Replace fuse or reset circuit breaker. Check for correct fuses Voltage Supply If voltage is below minimum voltage specified on unit data plate, contact local power company.
SM AH Series Heat Pump Troubleshooting | 23 Unit Troubleshooting Problem Possible Cause Checks and Correction INSUFFICIENT Unit undersized Recalculate heating and or cooling loads. If excessive, possibly adding COOLING OR insulation and shading will rectify the problem HEATING Loss of Check for leaks in duct work or introduction of ambient air through conditioned air by doors or windows...