Terminal Function - Robertshaw 9620 User Manual

TERM EQUIPMENT TO CONNECT
C 24VAC common connection
L System fault indicator connection
R 24VAC hot connection
Y2 Second stage cooling connection
Y1 First stage compressor connection
E Emergency heat connection
G Indoor fan connection
W2 Second stage heat connection
O Cool active reversing
valve connection
B Heat active reversing
valve connection
* For systems using a backup heat source. If separate E terminal connection is not available,
jumper E and W2.
** Most heat pump systems will have a cool active OR a heat active reversing valve. Use the
appropriate terminal.
12. Install two AA ENERGIZER
compartment. Be sure to match positive (+) ends of batteries with
positive (+) battery terminals in the battery compartment.
13. Replace cover on thermostat by snapping into place.
14. Turn on power to system. Test thermostat as described in the
following section.
TERMINAL LEGEND - 9620
®
REQ?
Yes
No
Yes
No
Yes
No*
Yes
No*
Yes**
Yes**
brand batteries or equivalent into battery
6

TERMINAL FUNCTION

For input of 24VAC common
side of transformer
For connection of system
fault indicator (if present)
For input of 24VAC hot side
of transformer
Energizes on a call for sec-
ond stage cooling
Energizes on a call for first
stage heating or cooling
Energizes on a call for heat
in the EM mode only
Energizes with E, Y1, Y2 and
W2 terminals or with FAN
option switched to the ON
position
Energizes on a call for sec-
ond stage of heat (auxiliary
heat)
Energizes when in the in
COOL mode
Energizes when in the
HEAT or EM modes