Greenheck Fan HRE-20, 90, 55, 45 manual Sensors Mounted by Factory, optional accessories

optional accessories

Sensors Mounted by Factory

Factory mounted temperature, pressure, and current sensors are available in the locations indicated on the unit diagram below.. A list of available sensors is shown below.. The specific sensors provided on a given unit are labeled in the unit control center on the terminal strip.. Sensors are wired to the terminal strip to make it easy for the controls contractor to connect the Building Management System for monitoring purposes..

TO

OUTSIDE

FROM

OUSTIDE

EF-A

EXHAUST BLOWER

OAF-P

OA

FILTER

EAW

OAI

EW-P

ENERGY WHEEL

OAW-P

RAI

OAAW

COOL	HEAT
COIL	COIL

ACC

RAF-P

RA

FILTER

OAF-A

SUPPLY

BLOWER

FROM INSIDE

TO INSIDE

OAD

Temperature Sensors - 1K Ohm RTD

Drawing Labels	Terminal Strip Labels
OAI	OA/Supply Inlet Temp
OAAW	OA After
ACC	After Cooling Coil Temp
OAD	Supply Discharge Temp
EAW	Exhaust After Wheel Temp
RAI	RA/Exhaust Inlet Temp

Pressure Sensors (analog or digital)

Drawing Labels	Terminal Strip Labels
OAF-P	OA/Supply Filter Pressure
OAW-P	Outdoor Air Wheel Pressure
RAF-P	RA/Exhaust Filter Pressure
EW-P	Exhaust Wheel Pressure

Amp - Current Sensors (analog or digital)

Drawing Labels	Terminal Strip Labels
OAF-P	Supply Fan Amps
EF-A	Exhaust Fan Amps

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