Lennox Raider ZG 036 Installation Instructions Manual

See unit nameplate for manufacturer
and address.
©2022
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
PACKAGED GAS UNITS
508328-01
8/2022
Supersedes 507259-04

Table of Contents

Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Connect Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
High Altitude Derate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pressure Test Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Two Stage Gas Valve Adjustment . . . . . . . . . . . . . . . . . . . .4
Gas Heat Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Proper Gas Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Typical Gas Heat Schematic . . . . . . . . . . . . . . . . . . . . . . . . 5
Typical Unit Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Repair Parts Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
Safety
WARNING
Improper installation,
service or maintenance can cause property damage,
personal injury or loss of life. Installation and service
must be performed by a licensed professional HVAC
installer (or equivalent), service agency or the gas
supplier.
Use of this unit as a construction heater or air condition-
er is not recommended during any phase of construction.
Very low return air temperatures, harmful vapors and op-
eration of the unit with clogged or misplaced filters will
damage the unit.
If this unit has been used for heating or cooling of build-
ings or structures under construction, the following condi-
tions must be met or the warranty will be void:
• The vent hood must be installed per these installa-
tion instructions.
• A room thermostat must control the unit. The use of
fixed jumpers that will provide continuous heating
or cooling is not allowed.
• A pre-filter must be installed at the entry to the re-
turn air duct.
• The return air duct must be provided and sealed to
the unit.
ZG 036-150 UNITS
3 THROUGH 12-1/2 TONS
adjustment, alteration,
INSTALLATION
INSTRUCTIONS
AGENCY REQUIRED
C US
092-150 036-074
• Return air temperature range between 55°F (13°C)
and 80°F (27°C) must be maintained.
• Air filters must be replaced and pre-filter must be
removed upon construction completion.
• The input rate and temperature rise must be set per
the unit rating plate.
• The heat exchanger, components, duct system,
air filters and evaporator coil must be thoroughly
cleaned following final construction clean-up.
• The unit operating conditions (including airflow,
cooling operation, ignition, input rate, temperature
rise and venting) must be verified according to
these installation instructions.
NOTE - The Commonwealth of Massachusetts stipu-
lates these additional requirements:
• Gas units shall be installed by a licensed
plumber or gas fitter only.
• The gas cock must be "T handle" type.
The unit is certified for installation on noncombustible
floors only. However, it may be installed on wood floor-
ing, or on class A, class B, or class C material covered
floors when used in horizontal discharge applications or
in downflow discharge applications when mounted on an
Z1CURB roof mounting frame.
Adequate clearance shall be provided around air open-
ings into the vestibule area. Provisions shall be made for
proper operation and for combustion air and ventilation
air supply. Unit must be adjusted for the temperature rise
range and within the allowable external static pressure on
furnaces with a duct system as listed on unit nameplate
036-074 036-074