Carrier TOSHIBA MMD-UP0071BHP-UL Service Manual page 18

UP0361, UP0421 type
Standard air flow: 1130 CFM
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.4 0.6 in.WG- Mid tap
0.3
0.6 in.WG- Low tap
0.2
0.1
Standard filter pressure loss
0.0
300 500 700 900 1100
Air flow rate (CFM)
The concealed duct unit has 7 steps of static pressure (MMD-UP0071 ~ 0181BHP-UL is 0.12 – 0.6 in. WG,
MMD-UP0211 ~ 0541BHP-UL is 0.12 – 0.8 in. WG) adjustment to meet the installation site requirements /
conditions.
With these steps there are different speed fan taps associated to select correct air fl ow.
For meeting the site requirement / conditions, make sure the external static pressure and air fl ow are
determined. Plot the external static pressure and air fl ow on the below graph to determine the right speed fan
step setting.
For example : Job site requirement is to deliver 400 CFM at 0.4 in. WG external static pressure. Using the below
graph, external static pressure on vertical axis and air fl ow on horizontal axis, the star mark indicates the job site
requirement.
The star mark is below 0.6 in. WG high speed fan tap line, which means the unit needs to be set to 0.6 in WG
external static pressure with high speed fan tap.
Please follow the process described in application controls of this manual for set up external static pressure.
UP007 type
0.80
0.70
0.60
0.50
0.40
0.4 in.WG- Mid tap
0.30
0.4 in.WG- Low tap
0.20
0.10
Standard filter pressure loss
0.00
0 100
NOTE
Supply air CFM will follow the solid line fan curve shown in the above graph if there is any change in the external
static pressure.
Supply air volume for medium and low fan speed tap is also set by remote controller. It will follow the dotted line
fan curve in the graph.
0.8 0.8 in.WG- H igh
0.6 in.WG- High tap
0.4 in.WG- High tap
0.12 in.WG- High tap
1300 1500 1700 1900
Standard air flow: 320 CFM
0.6 in.WG- High tap
★
200 300 400 500
Air flow rate (CFM)
UP0481, UP0541 type
1.1
1.0
0.9
0.8
0.7
0.6
0.5
0.6 in.WG- Mid tap
0.4
0.3
0.6 in.WG- Low tap
0.2
0.1
Standard filter pressure loss
0.0
300 500 700
2100
0.4 in.WG- High tap
0.26 in.WG- High tap
0.12 in.WG- High tap
600 700
- 18 -
Standard air flow: 1175 CFM
0.8 in.WG- High tap
0.6 in.WG- High tap
0.4 in.WG- High tap
900 1100 1300 1500 1700
Air flow rate (CFM)
0.12 in.WG- High tap
1900 2100