9
Fig. 20 — Relief Damper
Fig. 21 — Installing CRBARHOD001A00 Over Relief
Damper
Fig. 22 — CRBARHOD001A00 Hood Sides and Top
Accessories
SUPPLY AIR TEMPERATURE SENSOR (SAT)
When the unit is supplied with a factory-mounted PremierLink™
control, the supply air temperature (SAT) sensor (33ZCENSAT) is
factory supplied and wired. The wiring is routed from the Premier
-
Link control over the control box, through a grommet, into the fan
section, down along the back side of the fan, and along the fan
deck over to the supply-air opening.
The SAT sensor is wire tied to the supply air opening (on the hori
-
zontal opening end) in its shipping position. Remove the sensor
for installation. Re-position the sensor in the flange of the supply
air opening or in the supply air duct (as required by local codes).
Drill or punch a 1/2 in. hole in the flange or duct. Use two
field-supplied, self-drilling screws to secure the sensor probe in a
horizontal orientation.
NOTE: The sensor must be mounted in the discharge airstream
downstream of the cooling coil and any heating devices. Be sure
the probe tip does not come in contact with any of the unit or heat
surfaces.
OUTDOOR AIR TEMPERATURE SENSOR (OAT)
When the unit is supplied with a factory-mounted PremierLink™
control, the outdoor air temperature sensor (OAT) is factory
supplied and wired. The pink and violet wires of the 12-pin
economizer harness (pin 5 and 6) are used to connect the OAT
sensor to the PremierLink board.
INDOOR AIR QUALITY (CO
2
) SENSOR
Mount the optional indoor air quality (CO
2
) sensor according to
manufacturer specifications.
A separate field-supplied transformer must be used to power the
CO
2
sensor.
Wire the CO
2
sensor to the COM and IAQI terminals of J5 on the
PremierLink controller. Refer to the PremierLink Installation,
Start-up, and Configuration Instructions for detailed wiring and
configuration information.
ENTHALPY SENSORS AND CONTROL
Two different sets of enthalpy sensors can be used with the
PremierLink control. For single enthalpy control, either the
HH57AC077 or 33CENTHSW outdoor enthalpy sensor can be
used. For differential enthalpy control, either the HH57AC077
and HH57AC078 sensors or the 33CSENTHSW and
33CSENTSEN sensors are used. Refer to the appropriate sections
below for sensor installation.
OUTDOOR AIR ENTHALPY SENSOR/ENTHALPY
CONTROLLER (HH57AC077)
The enthalpy control (HH57AC077) is supplied as a
field-installed accessory to be used with the economizer damper
control option. The outdoor air enthalpy sensor is part of the
enthalpy control. (See Fig. 23.) The separate field-installed
accessory return air enthalpy sensor (HH57AC078) is required for
differential enthalpy control. (See Fig. 24.)
Unit
Outside
Air Hood
Min
19 1/2"
Relief
Opening
Return
Duct
16"
1"
18 3/8"
Outdoor Air
Hood
CRBARHOD001A00
Relief Hood
Ordered Separately
Field Supplied
Return Duct
Relief Damper
Min 19-1/2
”
*Blade Bracket
*Provided with Economizer
