Haier MRV5-H - Page 46

43
MRV 5-H
ENGLISH BETA 1.2
INSTALATION CHECK LIST
1. PREINSTALATION YES
1.1. REFRIGERATION PIPING
* Refrigerant piping is correctly insulated.
* Refrigerant piping have enough xed supports.
* All welds were made with nitrogen ow to eliminate copper oxidation.
* All branch ttings are installed in a horizontal position.
* Thereis at least 3-1/2 feet seperation between branchs, and 2 feet clearance from the indoor units.
1.2. DRAIN
* Drain piping is correctly insulated.
* Outlet for drain pipe.
* A drop of at least 1% is required (about 1 inch in 10 feet).
* Drain's piping diameter is sized per specications.
* Drain piping is separated for unit with condensate pump.
1.3. COMMUNICATION WIRE
* The communication wire is properly installed between outdoor and indoor units - P/Q (Assy. chain).
* The wire for centralized control is properly installed between A/C and interface (Assy. chain).
* Sequence of colors in the comm buss is guaranteed P-P, Q-Q.
* The wiring is 2 x 15 with shield. The shield layer is xed to ground at outdoor unit chassis only.
* The communication wire is enclosed in a dedicated conduit.
* There is a 4 inch minimum distance between communication wire and power conductors.
* Before commissioning; do not connect the comm buss wires to terminals P, Q on the outdoor unit.
1.4. ELECTRICIAL WIRE
* There is independent conduit for power wires to each indoor unit.
* There is a general power supply for all indoor units.
* There power supply phase for all indoor units that are grouped under one wired controller is the same.
* Power disconnects: is there a breaker for each outdoor and indoor unit?
* Electrical wires are installed to indoor and outdoor units correctly.
1.5. INDOOR UNITS
* Indoor units had dustproof protection during installation.
* All the units are properly leveled, and xing system allow adjustments when required.
* The are nuts are properly torqued for each indoor unit.
* Indoor units are in perfect physical condition free of dents or dings.
* There is at least 20 inches of free space around indoor unit for service and maintenance.