Applied Control For Outdoor Unit; Outdoor Fan High Static Pressure Shift - Toshiba MMY-MAP0726FT2P-UL Service Manual

7.

Applied control for Outdoor Unit

7-1. Applied Control for Outdoor Unit
The outdoor fan high static pressure support and priority operation mode setting (cooling / heating / number of
units / or priority indoor unit) functions are available by setting relevant switches provided on the interface P.C.
board of the outdoor unit.

7-1-1. Outdoor Fan High Static Pressure Shift

Purpose/characteristics
This function is used when connecting a duct to the discharge port of an outdoor unit (as part of, for example, unit
installation on the floor by floor installation.)
Setup
Turn ON the DIP switch [SW10, Bit 2] provided on the interface P.C. board of the outdoor unit.
This function must be enabled with every discharge duct connected outdoor unit for both of the header and follower
units.
Specification
Increase the speed of the propeller fan units on the outdoor fan to allow the installation of a duct with a maximum
external static pressure not greater than specified in the table below. If a discharge duct with a resistance greater
than 0.061 In WG (15 Pa) is to be used, enable this function. The maximum external static pressures of single
units are shown below (Table 1). In the case of combined use of multiple outdoor units, set all the units to the
same maximum external static pressure as the one with the lowest maximum external static pressure (see
table2).
Table 1: Maximum External Static Pressures of Single Outdoor Units
Model MMY-
Maximum external static pressure
(*) Outdoor unit air flow (CFM)
(*) Calculate duct resistance from outdoor unit air flow.
Table 2: Maximum External Static Pressures for Combined Use of Single Units
Maximum external static pressures for combined use of base unit
Outdoor unit
capacity type
outdoor unit
072 type
144 type
MAP0726*
0.24 InWG (60Pa)
5900
Combination
Header Follower
outdoor unit1
072 type -
072 type
072 type
Follower
outdoor unit2
- Standard Model
- Standard Model
− 65 −
Maximum external
static pressure
inWG
0.24
0.24