Steffes HPB22 Owners Manual - Manual (Page 12)

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BRICK LOADING AND
ELEMENT/JUMPER CONNECTIONS
(FIGURE 5)
E. DUCTING
Both inlet and outlet ports must be connected to the heat pump's air delivery plenum downstream of the
heat pump's A-coil(s). (See Figures 6 and 7, for proper connection arrangements.)
CAUTION: IN NO CASES shall either HPB inlet or outlet ports be connected to the
heat pump's return air duct or be connected to the inlet side of an A-coil.
For optimum performance, 10" steel duct pipe is recommended. To minimize possible sound transfer from the heat
pump booster, canvas connections should be used at the inlet and outlet port connections. Insulated or uninsulated flex
duct may be used, but caution must be taken to minimize sharp or excessive bends which could result in inadequate
airflow.
14. Replace stainless steel panel (2).
15. Lower insulation blankets (8, 9, and 10) back into position one at a time. Carefully tuck sides of blanket into
edges, corners, and around exposed portion of heating elements (18).
16. Replace galvanized front cover (13) utilizing #8 X 1" sheet metal screws.
17. Replace painted front panel (23) using blunt tip screws only.