TABLE 2: UNIT WEIGHTS AND CENTER OF GRAVITY
UNIT | SHIPPING | OPERATING | CORNER WEIGHTS | |||||
(LOCATION, LBS.) | ||||||||
WEIGHT |
| WEIGHT | ||||||
SIZE |
|
|
|
|
| |||
(LBS.) |
| (LBS.) |
|
|
|
| ||
| “A” | “B” | “C” | “D” | ||||
|
| |||||||
|
|
|
| |||||
|
|
|
|
|
|
|
| |
036 | 400 |
| 395 | 100 | 96 | 98 | 101 | |
042 | 410 |
| 405 | 104 | 100 | 101 | 105 | |
048 | 475 |
| 470 | 119 | 115 | 116 | 120 | |
060 | 480 |
| 475 | 120 | 116 | 117 | 122 | |
| FRONTUNITOF |
| "D" |
| CENTERGRAVITYOF |
| ||
|
| 25 | "B" | 25 |
|
| ||
FIGURE 2 - UNIT CENTER OF GRAVITY
CLEARANCES
All units require certain clearances for proper operation and service. Refer to Table 10 for the clearances required for combustion, construction, servicing and proper unit opera-
tion.
Do not permit overhanging structures or shrubs to obstruct the condenser air discharge, combustion air inlet or vent outlet.
DUCT WORK
These units are adaptable to downflow use as well as rear supply and return air duct openings. To convert to downflow, use the following steps:
1.Remove the duct covers found in the bottom return and supply air duct openings. There are four (4) screws securing each duct cover (save these screws to use later).
2.Install the duct covers, removed in step one, to the rear supply and return air duct openings. Secure with the four
(4) screws used in step one.
3.Seal duct covers with silicone caulk.
Duct work should be designed and sized according to the methods of the Air Conditioning Contractors of America (ACCA), as set forth in their Manual D.
A closed return duct system shall be used. This shall not pre- clude use of economizers or ventilation air intake. Flexible joints may be used in the supply and return duct work to min-
imize the transmission of noise.
When fastening duct work to the side duct flanges on the unit, insert the screws through the duct flanges only. Do not insert the screws through the casing. Outdoor ductwork must be insulated and waterproofed.
NOTE: Be sure to note supply and return openings.
Refer to Figure 9 for information concerning rear and bottom supply and return air duct openings.
ROOF CURB
On applications when a roof curb is used, the unit must be positioned on the curb so the front of the unit is tight against the curb.
FILTERS
A filter rack and a high velocity filters are standard.
Filters must always be used and must be kept clean. When filters become dirt laden, insufficient air will be delivered by the blower, decreasing your units efficiency and increasing operating costs and
Filters should be checked monthly especially since this unit is used for both heating and cooling.
CONDENSATE DRAIN
A condensate trap is recommended to be installed in the con- densate drain. The plumbing must conform to local codes. Use a sealing compound on male pipe threads. Install the condensate drain line (NPTF) to spill into an open drain.
SERVICE ACCESS
Access to all serviceable components is provided by the fol- lowing removable panels:
•Blower compartment
•Gas control/electrical service access
Refer to Figure 7 for location of these access panels and min- imum clearances.
Johnson Controls Unitary Products | 5 |