Lennox GCS16-653-75

Page 58
P-Transitions
Optional supply/return transitions (SRT16 AND SRTH16)
are available for use with downflow GCS16s utilizing the
optional RMF16 roof mounting frame. The transition must
be installed in the RMF16 mounting frame before mount
ing the GCS16 to the frame. Refer to the manufacturer's
instructions included with the transition for detailed instal
lation procedures.
Q-Supply and Return Diffusers
Optional flush mount diffuser/return FD9-65 and extended
mount diffuser/return RTD9-65 are available for use with
the GCS16. Refer to the manufacturer's instructions in
cluded with the transition for detailed installation proce
dures.
R-Status Panels SP11 and SSP11
Optional status panels allow remote monitoring of system
operation. Two types of panels are available. The SP11
(figure 76) provides system readout only. The SSP11
switching status panel (figure 77) is a combination switch
ing subbase and system readout. The SSP11 also has an
After Hours Timer" to override the unoccupied mode
(night heating setback / cooling setup).
NOTE - Status panels are not applicable to all GCS16
control systems. The following section details status
panel applications.
FIGURE 76
SP11 STATUS PANEL
Cool Mode
Heat Mode
Compressor 1
Compressor 2
No Heat
Filter
1-SP11 Application-
Required Equipment: Readout Relay Kit
Optional Equipment: Filter Switch Kit
The SP11 can be applied to all GCS16 control sys
tems. To operate an SP11, a readout relay kit is re
quired to interface the GCS16 to the SP11.
2-SSP11 Application-
Required Equipment with electrome
chanical thermostat: Readout Relay Kit
Required Equipment with W973 Control:
Readout Relay Kit and SSP11 Relay Kit
Optional Equipment: Filter Switch Kit
FIGURE 77
SSP11 SWITCHING STATUS PANEL
Cool Mode
Heat Mode
Compressor 1
Compressor 2
No Heat
Filter
OFF
HEAT
AUTO
COOL
EM HEAT
AFTER HOURS TIMER
START
SYSTEM
FAN
AUTO
ON
The SSP11 can be applied to GCS16s using standard
electromechanical thermostat or Honeywell W973
control systems only. The Flexstat, Prostat, W7400
and T7300 control systems provide switching features
similar to the SSP11, therefore, the SSP11 is not need
ed. To operate an SSP11, a readout relay kit is re
quired to interface the GCS16 to the SSP11. An
SSP11 relay kit is also required in units using an elec
tromechanical thermostat.
Optional filter switch kit is required to make the
dirtyfilter light functional.
3-Indications and Functions
Both status panels are identical in function except for
the switching and after hours capabilities of the
SSP11.