BGH BV-V28W/DHN1 Manual page 80

3.6 Refrigerant Piping Selection Example
The example below illustrates the piping selection procedure for a system consisting of one outdoor unit (16kW) and 6
indoor units. The system's equivalent length of all liquid pipes and gas pipes is in excess of 90m.
Figure 3-3.5: Refrigerant piping selection example
Legend
L Main pipe
1
L to L Indoor main pipes
2 5
a to f Indoor auxiliary pipes
A to E Indoor branch joints
Figures in parentheses indicate indoor
unit capacity indexes.
Step 1: Select indoor auxiliary pipes
• Indoor units N1~ N5 are of capacity 2.8kW, N6 is 2.2kW. Refer to Table 3-3.6. Indoor auxiliary pipe a, b, c, d, e, f is
Φ12.7 / Φ6.35.
Step 2: Select indoor main pipes and indoor branch joints B to E
• The indoor units (N
3-3.4. Indoor main pipe L
• The indoor units (N
3-3.4. Indoor main pipe L
• The indoor units (N
3-3.4. Indoor main pipe L
• The indoor units (N
3-3.4. Indoor main pipe L
Step 3: Select main pipe and indoor branch joint A
• The indoor units (N
equivalent length of all liquid pipes and gas pipes is in excess of 90m. The capacity of the outdoor unit is 16kW. Refer
to Tables 3-3.4 and 3-3.5. Main pipe L
and N ) downstream of indoor branch joint B have total capacity of 28 x 2 = 56. Refer to Table
1 2
is Φ15.9 / Φ9.53. Indoor branch joint B is FQZHN-01D.
2
and N ) downstream of indoor branch joint D have total capacity of 28 x 2 = 56. Refer to Table
3 4
is Φ15.9 / Φ9.53. Indoor branch joint D is FQZHN-01D.
4
and N ) downstream of indoor branch joint E have total capacity of 22+28 = 50. Refer to Table
5 6
is Φ15.9 / Φ9.53. Indoor branch joint E is FQZHN-01D.
5
to N ) downstream of indoor branch joint C have total capacity of 28 x 3+ 22 = 106. Refer to Table
3 6
is Φ15.9 / Φ9.53. Indoor branch joint C is FQZHN-01D.
3
to N ) downstream of indoor branch joint A have total capacity of 28 x 5+ 22 = 162. The system's
1 6
is Φ22.2 / Φ9.53, Indoor branch joint A is FQZHN-02D.
1
79