Carrier EconoMiser X - Connections and Wiring; W7220 Economizer Module Wiring

9
2-1/64 (55)
51/64 (21)
4-1/4 (108)
2-3/4 (70)
NOTE: Dimensions in ( ) are in mm
C12036
Fig. 5 -- Enthalpy Control Sensor, Dimensions and
DIP Switch Location
Table 6 – Enthalpy Control Sensor Wiring Terminations
a
Ter m i n a l
Type Description
Nbr Label
1 S --- B U S S --- B U S
S --- B u s C o m m u n i c a t i o n s
(Enthalpy Control Sensor Bus)
2 S --- B U S S --- B U S
S --- B u s C o m m u n i c a t i o n s
(Enthalpy Control Sensor Bus)
a Terminals are polarity insensitive.
Table 7 – Enthalpy Control Sensor DIP Switch Settings
Use
DIP Switch Positions for Switches 1, 2, & 3
1 2 3
DA
a
OFF ON OFF
RA
b
ON OFF OFF
OA
c
OFF OFF OFF
aDA=DischargeAir
bRA=ReturnAir
c OA = Outside Air
Install Outside Air Hood — Factory Option
The outside air hood for factory--option economizer is
shipped in knock--down form and requires field assembly.
See the base unit Installation Instructions for details on
assembling and attaching the outside air hood.
15 to 25 Ton Horizontal Return Application with
Barometric
Relief
If barometric relief is required remove the relief damper
and hinges from the (provided) bottom panel used on
vertical applications. Reinstall the hinges and damper on
the side of the field supplied return duct. (see Fig. 6)
NOTE: A relief hood for horizontal application can be
ordered separately (part number CRBARHOD001A00) or
can be field--supplied.
Outdoor Air
Hood
CRBARHOD001A00
Relief Hood
Ordered Separately
Field Supplied
Return Duct
Relief Damper
C09343
Fig. 6 -- Reinstall Hinges and Damper on Return Duct
LLECON--01SI