10/04/2007 2
NI802
General Comments
Upflow/Downflow/Horizontal
The arrangement of refrigerant coil, hydronics coil, and built-in electric elements need to follow specific
air direction or airflow rules, but the orientation of this Electric Furnace is not critical.
For upflow and horizontal standard
air conditioning
applications, the A-coil is mounted at the blower
outlet with field provided plenum or AC manufacturer’s case coil.
For upflow heat pump or hydronics applications, factory provided stackable modules are available for
return air filter, hydronics water coil, or
heat pump
refrigerant coil compartment.
Note:
For heat pump the coil must be at the blower inlet.
All models contain GE ECM™ Series 2.3 blower motors. The special Electro Industries interface board
allows hookup for heat/cool conventional or basic heat pump room thermostat. Blower speed setup and
WarmFlo sensor control are separate for cooling and heating (unique).
The ECM™ motor provided in this unit has many features not available in a standard motor.
-
Improved efficiency
-
Constant CFM
-
Soft start and stop
-
Better humidity control
The provided ECM™ motor contains permanently sealed bearings and does not require oiling.
Utility Load Control
Provisions are included for the Utility Receiver to interrupt compressor and WarmFlo or strip heat. No
provisions for dual heat, add HP-5046.
Two-Speed Heat Pump
Add WF-HP2 interface controller.
Zone Controller/Dampers
When using models HE-A or HE-H Series there are no adverse electrical heat concerns associated with a
zone damper system. However, there may be an effect on the heat pump compressor due to potential
reduced airflow. The zone dampers themselves must be in the horizontal ducts after the WarmFlo duct
sensor and at least 12” downstream of the WarmFlo sensor.
The zone controller “HVAC equipment” terminal block simply connects to this unit’s control board as if
it was a room thermostat to this unit. If the various zone sizes produce high static pressure and reduced
airflow, the WarmFlo temperature sensing technology will reduce the electric elements automatically.
If the zone damper action has an adverse effect on the heat pump compressor, Electro has zone controller
staging interface for 2-speed heat pump application (WF-HP2, etc.).
Side by Side, with Gas Furnace or Other Dual Heat Arrangements
Add-on dual heat controller HP-5046 can simplify the wiring for dual heat.
For side by side ducting, a motor operated damper is required to isolate the return air between two
blowers. The operation of this motor damper can be controlled from the HP-5046.
