Johnson Controls YVAHR192B32S - Page 4

ii
P5417009-rev.6
Product Inspection upon Arrival
1. Upon receiving this product, inspect it for any damages incurred in transit. Claims for damage, either
apparent or concealed, should be led immediately with the shipping company.
2. Check the model number, electrical characteristics (power supply, voltage, and frequency rating), and
any accessories to determine if they agree with the purchase order.
3. The standard utilization for this unit is explained in these instructions. Use of this equipment for
purposes other than what it designed for is not recommended.
4. Please contact your local agent or contractor as any issues involving installation, performance, or
maintenance arise. Liability does not cover defects originating from unauthorized modications
performed by a customer without the written consent of Johnson Controls, Inc. Performing any
mechanical alterations on this product without the consent of the manufacturer will render your warranty
null and void.
● This manual should be considered as a permanent part of the air conditioning equipment and should
remain with the air conditioning equipment.
1. When the system meets the following conditions, the outdoor unit may be thermo-OFF to prevent the compressor
from failure.
●
Total capacity of the operating indoor unit is larger than capacity of outdoor unit; and
●
Outdoor air temperature is 100
o
F DB (38
o
C DB) or more.
2. If the installation takes place under either one of the following conditions, the maximum connectable indoor unit
capacity ratio is 100%.
●
Outdoor air temperature is 109
o
F (43
o
C) or more during cooling operation; or
●
Outdoor air temperature is 14
o
F (-10
o
C) or less during cooling operation.
3. When installing the snow protection hood or low ambient kit, the upper limit of outdoor air temperature must be 109
o
F
(43
o
C).
4. When the outdoor air temperature is 23
o
F (-5
o
C) or less during the outdoor unit cooling operation, the minimum
connectable indoor unit capacity is 18MBH.
In this case, installing the snow protection hood (optional part) is required.
5. When the outdoor air temperature is 14
o
F (-10
o
C) or less during the outdoor unit cooling operation, the minimum
connectable indoor unit capacity is 18MBH.
In this case, installing the Low Ambient Kit (optional part) is required.
6. When operating the outdoor unit under the low cooling load conditions and in the low outdoor air temperature, (approx.
50
o
F DB (10
o
C DB) or less), the indoor unit will be Thermo-OFF to prevent the heat exchanger of the indoor unit from
frost.
Depending on the operating condition, the outlet air temperature of the indoor unit may be excessively low.
Pay attention to the direction of the outlet air. Do not place items near the air outlet and under the indoor unit as they
may be damaged by condensates that may form if the humidity or the latent heat load is continuously high.
(for example:
●
using at kitchen or gymnasium; or
●
using at the room that has high population density or introduces outside air; or
●
using humidier together; or
●
using combustion heater like gas heater together)
7. When operating the outdoor unit under the low heating load conditions and the outdoor temperature is
59
o
F DB (15
o
C DB) or more, the outdoor unit will be Thermo-OFF to protect the compressor from failure.
8. Operation in the outdoor temperature of 5~-13
o
F WB (-15~-25
o
C WB) is assumed to limited conditions such as start-
up in early morning. Extended operation in this condition may shorten the life of the compressor.
9. When the outdoor air temperature is 14
o
F (-10
o
C) or less, or under the high heating load conditions, the total indoor
unit capacity should be less than 100% of the outdoor unit capacity, and the total piping length should be less than
984 ft (300m).
10. There are some limitations of the Height Difference between Outdoor Units and Indoor Units.
Refer to Section 6.5 “Piping Size and Multi-kit Selection”, for details.