- 14 -
Figure 35 - Wiring Diagram with Neutral
Heat Wheel
– Ensure the heat wheel can
rotate freely by hand.
Heat Pipe
– Ensure installations are as per
manufacturer recommendation.
6.2 Start-up Check
Competent, well-trained personnel must
be employed in the following operations to
ensure Safety Rules and Regulation being
adhered to at all time.
IMPORTANT
FAILURE TO PROVIDE MOTOR
OVERLOAD PROTECTION COULD
RESULT IN MOTOR DAMAGE.
CONNECT THE MOTOR TO AN
OVERLOAD PROTECTIVE DEVICE
THAT IS RATED IN COMPLIANCE
WITH THE APPLICABLE CODE.
a.
Check the rotation of the fan impeller.
If the fan rotates in opposite direction
from desire, reverse any two phase
connection at motor terminal.
b.
Check that there is no unusual noise
or vibration. Stop and investigate if
found. (refer to section 8)
c.
Measure the voltage and drawn
current of the motor. The drawn
current must not exceed the full load
current
mentioned
at
motor
nameplate.
6.3 After first 48 hours of operation
a.
Make sure complete isolate the
Electrical source.
b.
Re-check and Re-tension the drive
belts due to stretch.
c.
Check and adjust the pulley alignment
to ensure the motor fixing is properly
secure.
d.
Check all bearing, wheel bolts & nuts
and sheave set screws (or cap screw)
are in secure position.
CAUTION
HIGH AIR TEMPERATURE IN FAN
SECTION CAN CAUSE MOTOR
OVERHEAT AND DAMAGE. ON
DRAW-THROUGH AIR HANDLERS,
ADJUST THE DISCHARGE AIR
TEMPERATURE OF THE HEATING
SECTION NOT TO EXCEED 104
0
F
(40
0
C).
6.4 Fan Operating Limits
The fan operating limits for forward curve
and airfoil fan are shown on the Table 3.
Total static pressure should be limited to
1000 Pa for forward curve and 1500 Pa for
backward curve/airfoil fan.
Table 3 - Fan Operating limits
Blower
Size
Forward Curved
Backward
Curve/Airfoil
Max.
RPM
Max.
kW
Max.
RPM
Max.
kW
200
3800
3
5700
2
225
3400
4
5400
3
250
2600
4
4400
3
280
2400
6
3900
4
315
2100
6
3500
5
355
1900
8
3100
6
400
1700
8
2700
8
450
1400
10
2500
11
500
1200
11
2200
11
560
1100
15
1900
15
630
900
15
1700
15
710
850
25
1500
30
800
750
25
1350
30
900
650
30
1150
35
1000
600
30
1050
35
6.5 Installation of VRV AHU Control
Box (EKEQ)
For installation VRV AHU Control Box,
please refer to the Installation And
Operation Manual in VRV ED or refer to
manufacturer for advices.
6.6 MicroTech III Commissioning
MicroTech III is an option. For
commissioning of MicroTech III, please
refer to the MicroTech III Commissioning
Manual in VRV ED or refer to
manufacturer for advices.
7. Maintenance
7.1 Fan / Motor
Check for soiling, corrosion, damage and
tendency of excessive vibration.
Check that all bolts and nuts and flexible
connections are securely fixed.
