Control Hierarchy / Operations - Greentek Profile 1.2E Series Installation, Operation And Maintenance Manual

CONTROL HIERARCHY / OPERATIONS

Terminal Block Label
S+
Remote off function (dry contact) – When S+ and S- terminals are shorted together, the ventilation product will
S-
B
A
↓
T+
T-
W
W
D+
Dehumidistat Input (dry contact) – When D+ and D- terminals are shorted together, the ventilation product will
D-
NO
Interlock relay connections – When the product is in standby mode, the contact is made between the NC and C
C
terminals. When the product is in ventilation or recirculation mode, the contact is made between NO and C.
NC
The speed selection switch is installed on or near the electrical box of the ventilation product. The selections that follow
are available:
• Reduced (low) speed
• Standby
• Normal (high) speed
The reduced and normal settings will keep the product in operation continuously if another function with a higher priority
is not activated.
The ventilation product prioritizes control signals as follows:
Remote Off (S+/S-) > Timer (T+/T-) > Defrost Cycle (internal) > Dehumidistat (D+/D-) > Four-wire controller (B/A) > Two-
wire controller (W/W) > Speed selection switch
The 12 VDC supply is available through connections across the terminals that follow:
• D+ and ground
Or
• S- and ground
The 24 VAC supply is labeled on the control board located in the electrical box. Please call customer service for more
information on install types and power supply limits.
be forced into standby mode until the dry contact is opened.
Digital communication lines for four-wire controllers.
12 VDC supply ground.
Timer connections.
Interface for two-wire wall controllers.
be forced into high-speed ventilation mode until the dry contact is opened.
Description
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