Ecm Motor - Daikin DPS005 Installation And Maintenance Manual

Rebel (size 003–015) SAFs and all EAFs utilize ECM
[electronically commutated external rotor] motors. ECM motor
speed is controlled by unit mounted, MicroTech III, static
pressure and temperature controls to reliably maintain comfort
conditions.
These ECM motors include locked rotor, phase failure, low
voltage, high temperature and short circuit protection as well
as built in soft start logic. Details are provided in the vendor's
IOM manual .
Customer design speed is programmed into the ECM motor
based on desired CFM and ESP. Design speed can be
changed as follows as long as the fan's maximum RPM is not
exceeded per Table 32 .
• Go into the MicroTech III keypad / display [see OM 1141
for detailed instructions]
• On the main menu, go to commission unit
• Go to SF [or RF/EF] set up menu
• find Max SAF [or EAF] RPM
• Enter the desired maximum RPM
Table 32: ECM Motor Fan Size Maximum RPM
Wheel Diameter (mm) SAF Max RPM
12" (310)
14" (355)
16" (400)
22" (560)
NOTE: 2-16" (400 mm) EAFs are available on sizes 016–028. Each uses the
same valves.
ECM Motor Setup
(Required when replacing exhaust fans)
ECM - Electronically Commutated Motor communicates
via modbus RS485 twisted pair cables to the Microtech III
controller. Microtech III can address the ECM for a supply,
return, or exhaust fan operation based on a unique modbus
address. A replacement ECM is shipped out from the
warehouse with an address of "1" which is a direct replacement
for a supply fan and does not require additional setup. If the
ECM is being used as a return or exhaust fan, it needs to be
setup with an address of "2"
IM 1125-7 • REBEL ROOFTOPS
EAF Max RPM
2580 2580
2600 2600
2040 2550
1750 NA
Addressing Return Or Exhaust ECM
1 . Close the MMP or shut the circuit breakers to the
supply and energy recovery drives to keep modbus
communication enabled only at the return/exhaust ECM.
2 . Verify the RS485 output on the Microtech III controller is
connected at terminals A and B to TB1 terminals 39 and
40 respectively.
3 . Make sure the shield for the twisted pair cable is
terminated at TB terminal 41 only.
4 . At the drive, verify wires from the controller side
terminals 39 and 40 are terminated at the ECM terminals
RSA and RSB. See
5 . At the Microtech III controller enter a level 2 password of
6363 and click on "About This AHU" to verify if code 101
is being used (310 for
Maverick). If any other
codes are being used,
please consult with
McQuay Warranty Service
group for technical
support .
6 . Press the middle
rectangular button to go
back to the main menu.
7 . Scroll down and click on the "Unit Configuration Menu"
8 . Scroll to the "SAF type" and set it to EBM VAV
9 . Scroll to the "RAF type" and set it to EBM VAV
10 . Scroll up to "Apply
Changes" and set it to
Yes. Wait for the controller
to restart .
11 . Enter the level 2 password
again and go into "Service
Menus"
74
eCM M
Detail B on page 84 .
www.DaikinApplied.com
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eCM M
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