Daikin RXYQ22M7W1B [158/182] Capacity correction ratio

Daikin RXYQ16M7W1B [158/182] Capacity correction ratio
18
4
Systems Outdoor Units
157
Inverter heat pump RXYQ5M7W1B, RXYQ8,10M8W1B
4 Capacity correction ratio
4-6 RXYQ18,26,28,30,38,40,42,44M
Rate of change in cooling capacity Rate of change in heating capacity
3D040057A
NOTES
1
These figures illustrate the rate of change in capacity of a standard indoor unit system at maximum load (with the thermostat set to maximum) under standard conditions.
Moreover, under partial load conditions there is only a minor deviation from the rate of change in capacity shown in the above figures.
2 With this outdoor unit, evaporating pressure constant control when cooling, and condensing pressure constant control when heating is carried out.
3 Method of calculating cooling / heating capacity (max. capacity for combination with standard indoor unit)
cooling / heating capacity
= cooling / heating capacity obtained from performance characteristics table x each capacity rate of change
When piping length differs depending on the indoor unit, maximum capacity of each unit during simultaneous operation is:
cooling / heating capacity
= cooling / heating capacity of each unit x capacity rate of change for each piping length
4 When overall equivalent pipe length is 90m or more, the diameter of the main gas and liquid pipes (outdoor unit-branch sections) must be increased
except for the gas pipe of RXYQ38,40,42,44M.
5 Read cooling / heating capacity rate of change in the above figures based on the following equivalent length.
Overall equivalent length
= Equivalent length to main pipe x Correction factor + Equivalent length after branching
Choose a correction factor from the following table.
When cooling capacity is calculated: gas pipe size
When heating capacity is calculated: liquid pipe size.
Example
In the above case
(Cooling) Overall equivalent length
= 80m x 1.0 + 40m = 120m
(Heating) Overall equivalent length
= 80m x 0.5 + 40m = 80m
The correction factor in capacity in cooling capacity when Hp=0m is thus approximately 0.83
heating capacity when Hp=0m is thus approximately 1.0
EXPLANATION OF SYMBOLS
H
p
: Level difference (m) between indoor and outdoor units with indoor unit in inferior position
H
M
: Level difference (m) between indoor and outdoor units with indoor unit in superior position
L : Equivalent pipe length (m)
α : Capacity correction factor
Model gas liquid
RXYQ18M ø 31.8 ø 19.1
RXYQ26,28,30M ø 38.1 ø 22.2
RXYQ40,42,44M Not Increased ø 22.2
Rate or change
(object piping)
Correction factor
Standard size Size increase
Cooling (gas pipe) 1.0 0.5
Heating (liquid pipe) 1.0 0.5
Model gas liquid
RXYQ18M ø 28.6 ø 15.9
RXYQ26,28,30M ø 34.9 ø 19.1
RXYQ40,42,44M ø 41.3 ø 19.1
Equivalent lenght Equivalent lenght
Indoor unit
Outdoor unit
Branch
80 m 40 m
Gas pipe : Size increase
Liquid pipe : Standard

Содержание

Скачать