Lennox ZGB Series Unit Information page 50

G-Power Exhaust Fans (Field-Installed)
Z1PWRE10 is available for downflow units and Z1P-
WRE15 is available for horizontal air flow units. Fans pro-
vide exhaust air pressure relief and also run when return
air dampers are closed and supply air blowers are oper-
ating. See figure 30, 31 and installation instructions for
more detail.
POWER EXHAUST FAN - DOWNFLOW APPLICATIONS
POWER EXHAUST FAN
FIGURE 30
FIELD-PROVIDED
AND INSTALLED
DUCTWORK
25" MIN.
POWER EXHAUST FAN - HORIZONTAL APPLICATIONS
16 1/2"
20"
16 1/2"
2 1/2"
FIGURE 31
Page 50
H-Control Systems
Different types of control systems may be used with the
ZGB series units. All thermostat wiring is connected to low
voltage pigtails located in the control box. Each thermo-
stat has additional control options available. See thermo-
stat installation instructions for more detail.
1- Electro-mechanical thermostat (13F06) The electro-me-
chanical thermostat is a two stage heat / two stage cool
thermostat with dual temperature levers. A non-switch-
ing or manual system switch subbase may be used.
2- Electronic thermostat (see price book) Any two stage
heat / two stage cool electronic thermostat may be
used.
I-Indoor Air Quality (CO2) Sensor A63
The indoor air quality sensor monitors CO2 levels and
reports the levels to the economizer enthalpy control A6.
Controller A6 adjusts the economizer dampers according
to the CO2 levels. The sensor is mounted next to the in-
door thermostat or in the return air duct. Refer to the in-
door air quality sensor installation instructions for proper
adjustment.
J-LP / Propane Kit (Field-Installed)
All units require a natural to LP /propane kit. For more
detail refer to the natural to LP gas changeover kit instal-
lation instructions
POWER EXHAUST FAN