Section 17 - Retrofit and Upgrades
191 Honeywell Economizers 63-8594-02
Replacement of W7212Axxx with W7220A1000 (JADE
TM
)
Step by step guide to assist you in successful replacement of the W7212 economizer with a
W7220 JADE
TM
economizer controller:
1. Remove all wires from the W7212. Mark each wire with the terminal designation (e.g.,
1,2,3,4, TR1, TR etc.) as it is removed from the W7212.
2. Mount JADE
TM
on the inside of the Rooftop unit where it will be easy to read the display and
to change the settings.
3. Wire JADE
TM
to the existing M7215 motor using three new wires and ¼ in quick connects on
motor end of wires:
4. Terminate wires removed from the W7212 to the JADE
TM
:
* Sensor to be changed
** CO
2
sensor no longer requires a separate transformer, can be powered by JADE
TM
*** EFH1 out is 24 Vac, need to add a DPDTrelay between EFH1 and C terminals.
M7215 wire termination W7220 Wire termination
TR ACT 24V (hot)
TR1 ACT COM
IN (+) ACT (2-10V)
W7212 wire termination W7220 wire termination
1 Y1-In
2 Y1-Out
3 Y2-In
4 Y2-Out
5 NA
TR R
TR1 C
NOCC
P-P1 NA
T-T1 MAT*
So-So+ OAT or S-Bus*
Sr-Sr+ S-Bus*
AQ-AQ1 IAQ terminals **
EF-EF1 EFH1***
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