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NOTE: Switchesshown in highenthalpy state.Terminals 2 and3 close
on enthalpy decrease.
Fig. 34 — Wiring Connections for Solid-State
Enthalpy Control (HH57AC077)
CONTROL
CURVE
CONTROL POINT
(APPROX. DEG.)
AT 50% RH
A 73 (23)
B 70 (21)
C 67 (19)
D 63 (17)
RH — Relative Humidity
Fig. 35 — Psychrometric Chart for
Enthalpy Control
NOTE: Partitions shown indicate both side supply (EW/EY) and ver-
tical supply (EJ/EK) units.
Fig. 36 — Economizer Details
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