York R-410A, Technical & Service Manual, Page: 244 / 385

Installation
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1.6) Lay the indoor pipeline
Note: Collocate the air-outlet reasonably to prevent airflow short-circuit. Check the static
pressure whether in the allowable range. The air filters should be easy to unpick and wash. Do
pressure test on pipeline.
1.7) Heat-insulation
Procedure:
Note: For welding part, flare part and branch pip, heat-insulation work must be done after
finished the pressure test.
1.8) Install outdoor unit
Procedure:
Note: 1. Gutter must be set around the foundation to drain the condensation water.
2. When installing outdoor units at the housetop, please check the strength of the
housetop and pay attention not to destroy the waterproof of the housetop.
1.9) Recharge refrigerant
Procedure:
Note: Please must use the correct formula that we supplied and the calculation results must be
correct.
1.10) Main points of test running and debugging
Please check the following issues before turning on the power:
1. Vacuum dry: make sure the vacuum degree accord with our requirement about 10-5.