Johnson Controls YVAHP072B31S, Service Manual

Page: 202 / 1796

1-186
Service Manual
INSTALLATION
5.5 Connecting Supply Duct
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the return and supply duct connection.
(2) Attach the vibration proof rubber to the Suspension Bolt in order to avoid abnormal sound vibration.
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(4) Perform heat insulation work over the duct to prevent condensation.
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This air conditioner unit is NOT designed for outdoor use.
The following items are to be strictly observed when designing a system for fresh air intake from the
outdoors.
1) Considering Ventilation Load
Calculate the air-conditioning load properly with the load of the outdoor air intake. If the load of the outdoor
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conditioning load against the unit capacity.
2) Limits on Outdoor Air Intake
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Do NOT ingest air from the outdoors directly into the indoor unit.
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installation of the ERV (Energy Recovery Ventilation) (Field-supplied) system.
The outdoor air shall be processed by the ERV and mixed with indoor air.
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NOTE:
The temperature of the air that is intermixed should fall within the working range as shown below.
Heating Cooling
Working Range of Required
Indoor Room Temperature 59 to 80
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(15 to 27
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to
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F DB/73
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F WB (32
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C DB/23
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or condensation build-up on the inside surfaces of the indoor unit or duct depending on the outdoor air
conditions.
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the indoor unit free from dust.
3) Facilities for Outdoor Air Intake
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Use the damper or the duct fan to adjust fresh air volume.
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Do NOT ingest in fresh air from the outdoors directly into the indoor unit.
Installing and integrating ERV as a part of the system mix is recommended if incoming air from outdoors
is routinely drawn indoors.
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Install thermal insulation on surfaces of interconnecting ducts to prevent the build-up of condensation.