4
INSTALLATION
NOTE: If installing economizer on 48/50LC 07-12 units, see “In
structions for 48/50LC 07-12 Units Only” on page 9.
1. Turn off unit power supply(s) and install lockout tag.
2. Remove the existing unit filter access panel. Raise the panel
and swing the bottom outward. The panel is now
disengaged from the track and can be removed. (See Fig. 2.)
Set the filter door aside for re-installation later.
3. Remove the indoor coil access panel and discard.
(See Fig. 2.)
4. Slide the EconoMi$er X assembly into the rooftop unit.
(See Fig. 3.)
NOTE: On small and large cabinets be sure to engage the rear
EconoMi$er X flange under the tabs on the unit base in the return
air chamber. (See Fig. 4.)
5. Ensure EconoMi$er X assembly is square (tolerance ±1/32
in). Screw the EconoMi$er X to the unit along both side
flanges and bottom flange. (See Fig. 3.)
6. Remove the red tape securing the relief dampers for shipping
purposes. Relocate the HH79AH001 dry bulb sensor from its
shipping location to its operating position. (See Fig. 1.)
7. If the EconoMi$er X assembly will be operating with an
enthalpy outside air sensor, remove the factory-installed
HH79AH001 dry bulb sensor from the front face of the
economizer (see Fig. 1) and install the accessory enthalpy
sensor HH57AC081 in the same location as the dry bulb
sensor. Connect the 2-wire gray harness with plug from the
EconoMi$er X assembly to the enthalpy sensor. See wiring
diagrams on pages 9 and 12. Refer to “Installing Optional
HH57AC081 Single Outside Air Enthalpy Sensor” on
page 13 for more details on enthalpy settings.
8. Remove and save the 12-pin jumper plug from the unit
economizer harness located in the upper left corner of the
unit. Insert the EconoMi$er X plug into the unit wiring
harness. (See Fig. 5.)
NOTE: The 12-pin jumper plug should be saved for future use, in
the event that the EconoMi$er X is ever removed. The jumper
plug is not needed as long as the EconoMi$er X is installed.
9. Remove the indoor blower access panel and the panel(s)
covering the unit control box. (See Fig. 6.)
10. In the hardware kit provided with the EconoMi$er X
assembly is the HH63AW002 controller (Honeywell
W7220). The controller is attached to a mounting bracket and
the EconoMi$er X harness is attached to the controller.
Mount the controller assembly on the left side of the unit
control box. Screw bracket to the control box through pre-
punched holes in control box. (See Fig. 7.)
11. Unplug the 10-pin female ECON plug currently connected to
the Central Terminal Board (CTB). (See Fig. 8.)
12. Connect the 10-pin female ECON plug removed from the
CTB to the 10-pin male plug from the controller harness. (See
Fig. 9 and page 9.)
13. Connect the 10-pin female plug from the controller harness
to ECON on the CTB. (See Fig. 10 and page 9.)
14. Connect the White wire from the controller harness to the
W1 terminal on the CTB. (See Fig. 10 and page 9.)
15. Connect the red and brown wires from the controller harness
to the CTB. (See Fig. 11 and page 9.) The red wire connects
to “R” on the CTB, and the brown wire connects to “C”.
16. Locate the green wire with yellow stripe from the controller
harness and screw it to the control box (ground). (See Fig.
12.)
17. Locate the 48TMHSRSE--A20 harness (with 4-pin female
plug) provided in the hardware kit with the EconoMi$er X
assembly. Connect the 48TMHSRSE--A20 harness to the 4-
wire harness with a male plug from the controller harness.
18. Route the 4-wire 48TMHSRSE--A20 harness through the
divider between the control box and the indoor blower
section. (See Fig. 14.)
19. Screw the HH79AH001 mixed air (MAT) sensor (Honeywell
C7250) to the left side edge of indoor blower through pre-
punched holes; see Fig. 15. Confirm that the screws do not
interfere with blower rotation. Locate the 50HE403859 2-
green wire harness shipped with the EconoMi$er X kit. It will
have a plug on one end and terminals on the other end.
Connect the plug from this harness to the MAT sensor. See
Fig. 15. Connect the 2 spade terminals on the 50HE403859
harness to the orange and brown wires from the 4-wire
48TMHSRSE--A20 Harness. (See Fig.15 and page 9.)
20. Connect the pink and violet wires from the 4-wire
48TMHSRSE--A20 harness to the pink and violet terminals
in the wire bundle in the indoor blower section. (See Fig. 16
and page 9.)
21. If using differential return sensor or DCV sensor, install it
now. See installation details later in the instructions, and the
wiring diagram for further information.
Assemble the EconoMi$er X hood by screwing the hood divider
to the hood subassembly (top and sides). (See Fig. 17.)
NOTE: On the CRECOMZR071A01 there is also a center hood
filter divider; screw in place. (See Fig. 18.)
22. Install aluminum filter(s) in EconoMi$er X hood. Clips at top
of hood will hold filters in place. (See Fig. 19.)
23. Install EconoMi$er X hood over economizer. Screw hood in
place through pre-punched holes. Reinstall the unit’s filter
access door. (See Fig. 20.) Re-install the Indoor blower
access panel. (See Fig. 6.)
24. After powering unit controller, program the W7220 controller
per the instructions to follow. See Table 8 for summarized
controller set up instructions. After all settings have been
made, re-install the unit control box panel. (See Fig. 6.)
Economizer performance charts are shown in Fig. 21 and 22. See
base unit installation manual to make adjustments to meet building
ventilation requirements. See Fig. 23 for typical EconoMi$er X
wiring diagram.
Fig. 2 —
Typical Access Panel Locations
Compressor
Access Panel
Outdoor-air Opening And
Indoor Coil Access Panel
Filter Access Panel
