Lennox LCH060H4E

Page 60
FIGURE 24
POWER EXHAUST FAN
P24
J24 JACK ON
INSIDE OF
ECONOMIZER
PANEL
CONNECT P18 TO J18 AND
P24 TO J24
BEFORE SECURING
EXHAUST FAN IN PLACE
P18
J18 JACK ON
UNDERSIDE OF
DIVISION PANEL
L-Indoor Air Quality (CO
2
) Sensor A63
The indoor air quality sensor monitors CO
2
levels and re
ports the levels to the Unit Controller. The Unit Controller ad
justs the economizer dampers according to the CO
2
levels.
The sensor is mounted next to the indoor thermostat or in the
return air duct. Refer to the indoor air quality sensor installa
tion instructions for proper adjustment.
M-Drain Pan Overflow Switch S149 (optional)
The overflow switch is used to interrupt cooling operation
when excessive condensate collects in the drain pan. The
N.O. overflow switch is controlled by K220 and DL46 relays,
located in the unit control panel. When the overflow switch
closes, 24VAC power is interrupted and after a five-second
delay unit compressors are de-energized. Once the conden
sate level drops below the set level, the switch will open. Af
ter a five-minute delay the compressor will be energized.
N-SunSource
®
Commercial Energy System
LCH036-072 packaged units are available with optional
factory-installed components which make them Sun
Source
®
Solar-Ready. These specially-equipped units can
be matched with solar modules and other optional equip
ment so that they can become part of a SunSource
®
Com
mercial Energy System.
Solar energy is first used to meet cooling/heating demands.
When the unit is not operating, the system powers lighting,
appliances and other electronic devices in the building. Any
surplus power is sent back to the utility company for a pos
sible credit (check your local utility company for policies).
The SunSource
®
Commercial Energy System consists of
the following components:
D Energence
®
3-6 ton SunSource
®
Solar-Ready pack
aged electric/electric (LCH036-072) HVAC units.
D Solar modules (1 to 21 may be used to vary the amount
of electricity generated on three-phase units; 15 mod
ules maximum on single-phase units).
D Envoy Communications Gateway monitors solar pow
er performance.
All components must be ordered separately.
Wiring runs from the roof-mounted solar modules to the
unit. From there, power travels to the electrical service pan
el using the existing HVAC unit power wiring.