THIS PROCEDURE MUST BE PERFORMED BY A QUALIFIED TECHNICIAN.
WARNING
HAZARDOUS VOLTAGE: Risk of electric shock. Can cause injury or death. System may be connected to more than one branch circuit. Disconnect power to all circuits before servicing. Equipment must be installed and serviced by a qualified technician.
Risk of personal injury or property damage. Water temperatures used for the Air Handler may not be acceptable for other heating zones in the installation. It is the responsibility of the installer to ensure that proper tempering devices are in place.
FREEZE PROTECTION: Risk of frozen pipes. Can cause property damage. Hydronic heating system freeze-ups WILL cause extensive damage to the entire heating system and/or property. Damage to the air handler piping system can occur in low ambient temperatures conditions or can be caused by a system malfunction during air conditioning mode. It is the responsibility of the installer to protect against freezing of all plumbing and water coils.
PIPING SUPPORT: Risk of exchanger damage. Can cause property damage or personal injury. DO NOT use the exchanger as support for piping. Support brackets should be in place to ensure proper operation of the system and to keep pressure off the inlet and outlet piping.
NOTE: Important Links are given at the bottom of this topic.
Installation of the water coil plumbing should be completed in a manner similar to the design shown in Typical System Plumbing Diagram.
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Standard copper pipe size 3/4”.
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Dedicated pump (circulator) to feed the water coil and provide comfort modulation. Steffes recommends a Taco 007 single speed 115 VAC pump (Order Item #1100002) or equal.
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Maximum recommended water temperature (as set in C011) is 180ºF/82ºC and the minimum recommended water temperature (as set in C012) is 150ºF/65ºC.
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Pump serving the air handler is powered with the black and white wires found in the junction box on the lower left side of the Comfort Plus Hydronic system. Refer to the Plumbing Section, Wiring Diagram, and Owner's and Installer's Manual for more information.
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Area in front of the air handler must remain open for accessing the blower, filter, and coils.
NOTE: It is the responsibility of the installer to prevent involuntary flow of the water to the air handler. Not doing so may cause limit tripping or decreased heat pump efficiency. Use of a check valve, zone valve, etc. may help in this situation.