5390862-UIM-A-0318
2
Johnson Controls Unitary Products
INSPECTION
As soon as a unit is received, it should be inspected for possible dam-
age during transit including copper distributor lines that may have shift-
ing during transit, and are touching either copper lines or the cabinet. If
damage is evident, the extent of the damage should be noted on the
carrier’s delivery receipt. A separate request for inspection by the car-
rier’s agent should be made in writing. See Local Distributor for more
information.
Requirements For Installing/Servicing R-410A Equipment
• Gauge sets, hoses, refrigerant containers, and recovery system
must be designed to handle the POE type oils, and the higher
pressures of R-410A.
• Manifold sets should be high side and low side with low side
retard.
• All hoses must have a 700 psig service pressure rating.
• Leak detectors should be designed to detect HFC refrigerant.
• Recovery equipment (including refrigerant recovery containers)
must be specifically designed to handle R-410A.
LIMITATIONS
The unit should be installed in accordance with all National, State and
Local Safety Codes and the limitations listed below:
1. Limitations for the indoor unit, coil, and appropriate accessories
must also be observed.
2. The outdoor unit must not be installed with any duct work in the air
stream. The outdoor fan is the propeller type and is not designed to
operate against any additional external static pressure.
3. The maximum and minimum conditions for operation must be
observed to ensure a system will give maximum performance with
minimal service.
4. These 2-stage units will operate down to the value noted in Table 1
without the need for a Low Ambient kit. Operation below the value
in Table 1 is not advised and the outdoor control board will stop
operation control board will stop operation below 35
°
F and the unit
control board will not allow cooling operation below 35
°
F outdoor
ambient temperature.
DO NOT
modify the control System for these
models to operate with any kind of Low Ambient kit.
5. If this equipment is to be used in a low ambient outdoor application,
(-55
°
F or lower) a compressor crank case is heater accessory must
be applied. Please refer to UPGnet or price pages for the appropri-
ate Crank Case Heater for your model.
6. The maximum allowable line length for this product is 80 feet. To
install more than the maximum allowable line length, consult the
Piping Application Guide (P/N 247077).
SECTION III: UNIT INSTALLATION
LOCATION
Before starting the installation, select and check the suitability of the
location for both the indoor and outdoor unit. Observe all limitations and
clearance requirements.
The outdoor unit must have sufficient clearance for air entrance to the
outdoor coil, air discharge, and service access. See Figure 1.
If the unit is to be installed on a hot sun exposed roof or a paved ground
area that is seasonally hot, the unit should be raised sufficiently above
the roof or ground to avoid taking the accumulated layer of hot air into
the outdoor unit.
If the system is being installed during seasonally cold weather of 55
°
F
or below, the preferred method is to weigh in the charge. For charging
or checking the system charge at 55
°
F or below, refer to the “Optional
Cold Weather Charging” procedures near the end of SECTION VI:
SYSTEM CHARGE. There is an “Optional Cold Weather Charging”
accessory kit to prevent the outdoor unit from taking in cold air below
55
°
F. The kit part number can be found in the list of accessory kits on
the UPGNET web site.
Provide adequate structural support for the unit.
TABLE 1:
Minimum / Maximum Operating Limit Conditions
AIR TEMPERATURE AT
OUTDOOR COIL, °F (°C)
AIR TEMPERATURE AT
INDOOR COIL, °F (°C)
Min.
Max.
Min.
Max.
DB Cool
DB Cool
WB Cool
WB Cool
35-54(2-12)
1
55 (13)
2
1. With Crankcase Heater Kit.
2. Without Crankcase Heater Kit.
125(52)
57(14)
72(22)
NOTICE
For multiple unit installations, units must be spaced a minimum of 24”
(61 cm) apart (coil face to coil face).
