Applied Control And Function; Applied Control For Outdoor Unit; Outdoor Fan High Static Pressure Shift - Carrier MMY-MAP0724FT9UL Service Manual

7. APPLIED CONTROL AND FUNCTION

7-1. Applied Control for Outdoor Unit

The outdoor fan high static pressure support functions are made available by setting relevant switches
provided on the interface P.C. board of the outdoor unit.

7-2. 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 0.06 InWG (15 Pa) is to be used, enable this function. The maximum external static
pressures of base 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 Base Outdoor Units
Model
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 Base Units
(1) Standard models
Combined
horsepower output
6 Ton MAP0724FT
8 Ton MAP0964FT
10 Ton MAP1204FT
12 Ton
14 Ton
16 Ton
18 Ton
20 Ton
MMY- MAP0724FT
0.2 lnGW (50 Pa)
Combination of outdoor units
Model
MMY-
Unit 1
∗
MAP0724FT
∗
MAP0964FT
∗
MAP1204FT
∗
AP1444FT MAP0724FT
∗
AP1684FT MAP0964FT
∗
AP1924FT MAP0964FT
∗
AP2164FT MAP1204FT
∗
AP2404FT MAP1204FT
∗
MAP0964FT
0.16 lnGW (40 Pa) 0.16 lnGW (40 Pa)
5120 7060
Unit 2
∗
—
∗
—
∗
—
∗
MAP0724FT
∗
MAP0724FT
∗
MAP0964FT
∗
MAP0964FT
∗
MAP1204FT
– 69 –
∗ ∗
MAP1204FT
7620
Maximum external
static pressure
lnGW (Pa)
0.2 (50)
0.16 (40)
0.16 (40)
∗
0.2 (50)
∗
0.16 (40)
∗
0.16 (40)
∗
0.16 (40)
∗
0.16 (40)