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Installation
Indoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Unit Arrangement DB / HZ / UB . . . . . . . . . . . . . . . . 4
Roof Mounted Unit - Arrangement DBC . . . . . . . 5-6
Optional Evaporative Cooler Module . . . . . . . . . . . . . 6
Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Direct Gas Piping . . . . . . . . . . . . . . . . . . . . . . . . . . 8-9
Optional Evaporative Cooler Piping . . . . . . . . . . . 9-10
Optional Water Wizard™ . . . . . . . . . . . . . . . . . . . . . 11
Optional Direct Expansion (DX) Coil Piping . . . . 12-13
Optional Chilled Water Coil Piping . . . . . . . . . . . . . 13
Optional Building Pressure Control . . . . . . . . . . . . . 14
Optional Dirty Filter Switch . . . . . . . . . . . . . . . . . . . 14
Start-Up
Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Direct Gas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-18
Optional Evaporative Cooling Recirculating . . . . . . 19
Optional Water Wizard™ . . . . . . . . . . . . . . . . . . 20-21
Operation
Optional Water Wizard™ . . . . . . . . . . . . . . . . . . . . . 21
Optional VAV Units . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Optional Recirculating Units . . . . . . . . . . . . . . . . . . 23
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Blower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Motor Overamps . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Insufficient / Too Much Airflow . . . . . . . . . . . . . . . . 27
Excessive Noise or Vibration . . . . . . . . . . . . . . . . . . 28
Direct Gas Heater Does Not Operate . . . . . . . . 29-30
Optional Evaporative Cooling . . . . . . . . . . . . . . . . . 31
Optional Water Wizard™ . . . . . . . . . . . . . . . . . . . . . 32
Maintenance
Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33-34
Fall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Reference
Gas Train Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Control Center Layout . . . . . . . . . . . . . . . . . . . . . . 37
Start-Up Check List . . . . . . . . . . . . . . . . . . . . . . . . . 38
Maintenance Log . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Clearance to Combustibles /
Service Clearances
Floor
Insulated/
0 inches
Units
(0 mm)
Non Insulated
0 inches
Units
(0 mm)
Clearance to combustibles is defined as the minimum distance
required between the heater and adjacent combustible surfaces
to ensure the adjacent surface's temperature does not exceed
90 degrees above the ambient temperature.
Recommended Minimum Service Clearances
Housing 32 and less
Housing 35 and higher
Clearances for component removal (such as evaporative cooler media)
may be greater than the service clearances listed.
®
Top
Sides
Ends
0 inches
0 inches
0 inches
(0 mm)
(0 mm)
(0 mm)
6 inches
6 inches
6 inches
(152.4 mm)
(152.4 mm)
(152.4 mm)
42 inches (1066.8 mm)
on the controls side of the unit
48 inches (1219.2 mm)
on the controls side of the unit
Installation of Indoor Unit
1. Install Hangers
Install threaded hangers from ceiling supports. When
locating hangers, allow enough room to open access
panel(s). Two nuts must be used on the end of each
threaded hanger. Ceiling supports are supplied by
others.
2. Install Unit
Using sheet metal screws, attach the weatherhood/
thru-wall/filter section to the blower/burner section.
The flange on the weatherhood/thru-wall/filter section
should overlap the flange on the blower/burner section.
Raise the assembled unit into place.
Using two nuts per hanger, fasten the unit supports to
the hangers under the unit. Appropriate unit supports,
such as the optional hanging bracket kit or c-channel
and angle iron (supplied by others) should be used.
Using self-tapping screws, attach ductwork to unit.
In order to prevent the unit from swinging and to provide
a safe environment for service and maintenance,
additional measures must be taken to secure the unit in
all directions.
Ceiling Supports
Hangers
Indoor Mounting
NOTE
Two nuts must be used on each end of each threaded
hanging rod for proper support.
NOTE
Good duct practices should be followed for all
ductwork. Ductwork should be installed in accordance
with SMACNA and AMCA guidelines, NFPA 96 and
any local codes. Reference the CAPS submittal for
duct sizes.
3. Seal Wall Opening
Apply sealant around
the perimeter of the
weatherhood to prevent
water penetration and
drafts into the building.
Direct Spark Ignition Make-Up Air
Ductwork
Unit Supports
Sealant
Seal Wall Opening
3
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