Sanyo DHX4852 - Manual (Page 15)

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Design of W-2WAY ECO-i SYSTEM Unit Specifications
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1. Model Selecting and Capacity Calculator
Table 2-2 Refrigerant Charge Amount at Shipment (for outdoor unit)
DC
CHDX09053 CHDX14053
(oz) 423 458
Table 2-4 System Limitations
Max. No. allowable connected outdoor units 2 *1
Max. capacity allowable connected outdoor units 307,100 BTU/h (32 hp, 90 kW)
Max. connectable indoor units 40
Max. allowable indoor/outdoor capacity ratio 50 – 130 %
*1: Up to 2 units can be connected if the system has been extended.
Additional refrigerant charge amount is calculated from the liquid tubing total length as follows.
Table 2-3 Amount of Refrigerant Charge Per Meter, According to Liquid Tubing Size
Liquid tubing size Amount of refrigerant
(in. (mm)) charge (oz/ft.)
ш1/4" (ш6.35) 0.279
ш3/8" (ш9.52) 0.602
ш1/2" (ш12.7) 1.38
ш5/8" (ш15.88) 1.99
ш3/4" (ш19.05) 2.78
ш7/8" (ш22.22) 3.93
Required amount of charge = (Amount of refrigerant charge per
meter of each size of liquid tube × its tube length) + (...) + (...)
* Always charge accurately using a scale for weighing.
* If the existing tubing is used, and the amount of on-site additional
refrigerant charge exceeds the value listed below, then change the
size of the tubing to reduce the amount of refrigerant.
Max. additional charge for 1 outdoor unit : 62 lbs
Max. additional charge for 2 outdoor units : 111 lbs
TD831138-02_W-2WAY.indb 5 2007/07/26 14:30:27