Minimum Operating Clearances - Trane XL19i-APG02-EN Application Manual

Section III - Minimum Operating Clearances
This section discusses applying a condensing unit / heat pump in installations where there are space
constraints.
These concerns must be addressed:
1. System Operation - Adequate airflow must be provided to the condensing unit / heat pump in order
to enable appropriate heat transfer. If this is accomplished, head pressure will remain at an effective
operating range.
2. System Servicability - Proper space must be allowed for HVAC service technician to properly
maintain the condensing unit / heat pump. Furthermore, space must be allowed for major component
change out in the event of a failure. Working space is determined by the National Electric Code
3. Space Maintenance - Appropriate area must be allowed in order maintain the ground area where the
units are positioned to prohibit debris from collecting on the panels, thus further providing unobstructed
airflow to the condensing unit.
4. State, Local Codes, and National Codes shall prevail. Check with the local jurisdiction before
installation to assure compliance.
Numerous projects require reduced clearances between outdoor units and adjacent walls, fences and other
units. The obstruction in question is usually one of the following:
1. Deck.
2. One or more walls of an adjacent building.
3. Fences or barriers provided to reduce sound transmission or visually screen the equipment.
4. Other outdoor units in a multi-unit installation.
5. A combination of the above.
The prime considerations involved in establishing minimum clearances are:
1. Adequate airflow to the outdoor coil with minimum recirculation.
2. Service access to the equipment.
3. Compliance with the National Electric Code and other applicable codes.
4. Design temperature - Design temperatures greater than 105F require additional consideration.
I. In order to assure that adequate airflow reaches the XL19i condensing unit, size free air passages at 300
feet per minute velocity (FPM). See condensing unit airflow performance on page 16 of this document; or,
for the most current information, consult the unit's product data manual.
II. The importance of providing proper service access to equipment cannot be overemphasized. The HVAC
service technician's job may be performed with greater ease if adequate service space is allowed.
III. Knowledge of the National Electric Code and other applicable codes for the job sight location is a
necessity in order to satisfy local inspectors. These codes are in place for service as well as safety.
IV. Be sure to read all provisions and footnotes contained in this document. When ambient temperatures
exceed 105F, more space may be required for minimum operating clearances.
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