Lennox GCS16-653-125

Page 66
Some of the following optional thermostat control
systems have builtin warm up capabilities and the
warm up kit shown in figure 84 cannot be added due
to wiring incompatibility.
WARM UP KIT
FIGURE 84
J8
P8
4- C24 -- Standard heat/cool thermostat for single
phase residential GCS16R and GCS16H. Optional
controls cannot be used. Thermostat is hard wired to
unit (terminal strip not provided).
5- C19 -- Special limited application of commercial
(electromechanical or electronic) thermostat and D5
or D8 economizer to singlephase GCS16H. Econo
mizer harness (shown as a part of C19 wiring dia
gram) is provided in required RDE16-41 transition.
Harness provides J3 jack for connecting economizer.
Harness hard wires to unit and thermostat with pig
tails (no terminal strip provided). Night thermostat
and CMC3-1 clock must be added for night setback.
Night relay must also be added to economizer for
night setback.
6- C1-1 -- Standard 2 heat / 2 cool thermostat for all
commercial units without economizer or warmup.
7- C1-2 -- Standard 2 heat / 2 cool thermostat for all
commercial units with economizer but without warm
up. CMC3-1 clock and night thermostat must be add
ed for night setback. Night relay must also be added
to economizer for night setback.
8- C2
Standard 2 heat / 2 cool thermostat for all commercial
units with economizer and warmup. CMC3-1 clock
and night thermostat must be added for night set
back. Night relay must also be added to economizer
for night setback.
9- C11-1 -- Standard 2heat/2cool thermostat for all com
mercial units without economizer or warmup. C11
Night Kit adds a relay facilitating night setback function
(see figure 85). CMC3-1 clock and night thermostat
must also be added to make setback relay functional.
FIGURE 85
NIGHT KIT
P4
RELAY K11
NOTE - Flexstat (C3 and C4 diagrams) was discontin
ued as a control system option in July 1989 and is not
shown in the GCS16 (2-5 ton) promotional material.
However, Flexstat remains a valid matchup to com
mercial GCS16s of all sizes until inventories are de
pleted. You may find some (2-5 ton) units using it.
10-C3-1 -- Flexstat L2F-N for commercial units without
economizer or warmup. Setback is built in.
11-C3-2 -- Flexstat L2F-N for commercial units with econo
mizer but without warmup. Setback is built in.
12-C4-1 -- Flexstat L2F-N for commercial units with econ
omizer and warmup. Setback is built in.
13-C5-1 -- Prostat L2F-N for commercial units without
economizer or warmup. Setback is built in.
14-C5-2 -- Prostat L2F-N for commercial units with econo
mizer but without warmup. Setback is built in.
15-C6-1 -- Prostat L2F-N for commercial units with econ
omizer and warmup. Setback is built in.