Installation; Jobsite Survey; Plan For Unit Location; Rig And Place Unit - Carrier DesertMaster 50TJM Operation And Maintenance

2 – INSTALLATION
2.1 – Jobsite Survey
Complete the following checks before installation.
1. Consult local building codes or the U.S.A. National Electrical Code (Ref: ANSI/NFPA 70, [American National
Standards Institute/National Fire Protection Association], latest revision) for special installation requirements.
2. Determine unit location (from project plans) or select unit location.
3. Check for possible overhead obstructions which may interfere with unit lifting or rigging.
2.2 – Plan for Unit Location
Select a location for the unit and its support system (curb or other) that provides for the minimum clearances required
for safety. This includes the clearance to combustible surfaces, unit performance and service access below, around
and above unit as specified in Fig - 3. For the centre of gravity coordinates, the position of the unit mounting holes,
and the weight distribution points, refer to the unit dimensional drawing Fig - 1 and Fig - 2.
NOTES:
1. Minimum clearance:
REAR: 2134mm for coil removal. This dimension can be reduced to 1219mm if conditions
removal from the top.
TOP: 1829mm to assure proper condenser fan operation.
SIDE: 1219mm for Compressor, Filter and Control boxes access.
- Local codes or jurisdiction may prevail.
2. With the exception of clearance for the condenser coil and the damper / power exhaust as stated in Note no. 3, a
removal fence or barricade requires no clearance.
3. Dimensions are from outside of corner post. Allow 8mm on each side for top cover drip edge.
2.3 – Rig and Place Unit
Keep unit upright and do not drop. Spreader bars are not required if top crating is left on unit.
Rollers may be used to move unit across a roof Level by using unit frame as a reference; leveling tolerance is± 1/16
in. per linear ft in any direction.
Four lifting holes are provided in ends of unit base rails as shown in Fig – 4 Refer to rigging instructions on unit.
Roof mount - Check building codes for weight distribution requirements. Unit weight and dimensions is shown in unit
dimensional drawing Fig 1 and Fig 2 on page 6 & 7 and table 2.
NOTE: Consider also the effect of adjacent units.
Fig. 3 Unit Clearance Diagram
Fig. 4 Rigging Diagram
Page 8
permit coil