System Configuration; Procedure For Selecting Model Type And Calculating Performance - Sanyo SGP-EW120M2G2W Technical Data Manual

System Design

(1) Procedure for selecting model type and calculating performance

Perform the following procedures to select a model type and calculate performance capabilities.
Calculate indoor A/C load
Select A/C system
Design the control system
Select the indoor unit type
Provisionally select indoor/-
outdoor unit combination
Correct performance for
indoor/outdoor performance
Check piping length and
mounting height difference
between indoor and outdoor
Correct performance for pipe
length, height difference and
ambient conditions
Reconfirm combined
performance of indoor and
outdoor units
Determine the piping layout
Calculate the additional
charge amount
Design wiring to handle
system capacity
● Calculate the maximum A/C load for each room or zone.
● For each room or zone, select the most suitable air conditioning
● E.g., Individual, centralized or centrally monitored control (see the
● Select the appropriate indoor unit type for the A/C system, e.g.,
● Indoor units with up 130% of outdoor unit capacity can be connected.
● If the total capacity of the indoor units exceeds outdoor unit
ratio
● Because outdoor unit limitations are model-dependent, be sure to
units
● Make performance corrections for ambient air conditions, piping
● If a provisionally selected model type is inadequate after
● Design the pipe layout so as to minimize the required amount of
● If system expansion is contemplated, include those
● Calculate the amount of additional refrigerant charge from the
● Check the minimum indoor performance capability and floor area
● Select wiring capacity according to power supply capabilities.
method using GHP.
section on Control Information document)
ceiling cassette, all-duct built-in-ceiling, ceiling-mount, kitchen, or
floor-mounted type.
* Up to 24 indoor units can be connected to an outdoor unit.
capacity, apply a performance correction.
locate the equipment so that the specified tolerances for
refrigerant piping lengths and mounting height difference are
maintained when allocating units.
lengths (effective length), and mounting height difference.
performance corrections, reconsider your configuration.
additional refrigerant charge.
considerations in the design.
diameters and lengths of refrigerant pipes on the refrigerant pipe
system drawing and the unit additional charge amount.
(density limit) for the amount of refrigerant. If the density limit is
exceeded, reconsider ventilation equipment.
There are limitations if indoor and outdoor units are powered from
a bus system. If a bus system is employed for the indoor units,
consider including the outdoor unit(s) in the system as much as
possible.
D-2

1. System Configuration