Applied Control Of Outdoor Unit; Outdoor Fan High Static Pressure Shift; Purpose/Characteristics; Maximum External Static Pressures Of Single Outdoor Units - Toshiba MMY-MUP0801HT8JP Service Manual

6-6. Applied Control of 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.

6-6-1. Outdoor Fan High Static Pressure Shift

Setup
Change the outdoor DN code. (O.DN [19]) into "Outdoor Fan High Static Pressure operation."
This function must be enabled with every discharge duct connected outdoor unit for both of the header and
follower units.

Purpose/characteristics

Outdoor DN Code
(O.DN) Setting
Operation
O.DN [19] = 0000 Normal operation
O.DN [19] = 0001 Outdoor Fan High Static Pressure operation
Specifications
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 15 Pa (1.5 mmAq) 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.
Table 1: Maximum External Static Pressures of Single Outdoor Units
Model
Maximum external static pressure
∗ Outdoor unit air flow
Model
Maximum external static pressure
∗ Outdoor unit air flow
( ) Calculate duct resistance from outdoor unit air flow.
Operation
MMY-MUP
0801*
(Pa) 80
3
(m /min) 165
1601*
MMY-MUP
80
(Pa)
3
(m /min) 255
- 86 -
1001* 1201* 1401* 14A1*
80 80 80
80
175 195 198 230
1801* 2001* 2201* 2401*
80 80 80 80
280 265 275 275