Operating instructions

02/14/2006 2 NI806
Inlet Cabinets
Factory optional cabinets can be configured with this Electric Furnace. Typically these are designed for
upflow applications; however, the heat pump coil cabinet could be used in other positions.
Side Entry, Filter Cabinet
Return air can be ducted into either side, 15-⅜” x
19” cutout hole is provided with one filler plate.
Easy access door for checking and changing filter.
Adjustable rails are provided for standard 4” x 20”
x 20” pleated filter.
Filter examples include Honeywell 203721, BestAir
HW2020, or Grainger
®
6B936.
Standard 1” filter (20” x 20”) – field installer could arrive at filter filler bracket for slip-in within the
provided rails.
Comment – The 3M MERV filter airflow resistance needs to be considered in duct design
calculations. Per specification information from 3M the static pressure drop across the 1”, Series
1000, MERV 11 filter is 0.2” SP.
Hydronics Coil and Cabinet
The inlet cabinet includes a water coil with
parameters shown. The return air connection must
be on a side which allows coil draw-through. The
cabinet can be reversed for either left or right side
entry. The inlet for this cabinet is sized for an
externally installed packaged return air filter cabinet
– typical 20” x 20” size.
1. Nominal or rated Btu/h, 50,000
2. Recommended CFM setup, 1100 min.
3. Inlet water 120° at 10 GPM minimum.
4. Expected outlet air temperature, 115°
Reduced CFM and/or inlet water temperature will
reduce Btu/h rating.