IOM / Rooftop Smart and Linéa™ Range - Page 27
COMMISSIONING
COMMISSIONING
COMMISSIONING
COMMISSIONING
COMMISSIONING
BLOWER OPERATION AND
ADJUSTMENTS
Unit is equipped with direct drive, multi-speed indoor blower.
See unit wiring diagram for factory setting.
Blower Operation
1. Blower operation is manually set at the thermostat
subbase fan switch. When fan switch is in “On” posi-
tion, blower operates continuously.
2. When fan switch is in "Auto" position, blower will cycle
with demand. Blowers and entire unit will be off when
system switch is in "Off" position.
Blower Speed Adjustment
Blower motor wires are routed back to the unit control box
when the wires end in pigtails. blower motor speed can then
be changed by rearranging the pigtail connections.
IMPORTANT : To prevent motor burnout, never connect more
than one motor lead to any one connection. Black and blue
motor taps must be connected together when operating on
low or medium speeds. Tape unused motor leads separately.
Minimum Blower Speed (With Electric Heat)
Refer to ECH16 installation instructions for minimum
allowable blower speed when electric heat is used.
SCA
= Cooling only unit
SHA
= Heat pump rooftop
External static pressure (Pa)
0
25
50
75
100
125
150
175
185
SIZE
Fan speed
Q (m
3
/h)
Q (m
3
/h)
Q (m
3
/h)
Q (m
3
/h)
Q (m
3
/h)
Q (m
3
/h)
Q (m
3
/h)
Q (m
3
/h)
Q (m
3
/h)
Low
1295
1260
1224
1188
1152
1080
1008
972
900
10
Medium - Low
1620
1584
1548
1512
1440
1404
1332
1260
1188
Side
Medium - High
1818
1800
1728
1692
1620
1548
1476
1404
1332
Discharge
High
2088
2052
1980
1944
1872
1800
1692
1620
1548
Low
1296
1260
1224
1188
1116
1080
1008
972
900
10
Medium - Low
1602
1548
1512
1476
1440
1368
1296
1260
1188
Bottom
Medium - High
1710
1692
1656
1620
1548
1512
1440
1368
1296
discharge
High
1980
1944
1872
1836
1728
1692
1620
1512
1440
13
Low
1692
1692
1656
1620
1584
1548
1512
1476
1404
Side and
Medium
2556
2484
2448
2376
2304
2232
2124
2016
1908
bottom discharge
High
3042
2952
2844
2772
2628
2484
2340
2196
2016
15
Low
2682
2628
2592
2520
2448
2376
2268
2196
2088
Side
Medium
3096
3060
2988
2916
2808
2700
2592
2484
2340
discharge
High
3492
3420
3348
3276
3168
3060
2916
2772
2628
15
Low
2502
2448
2412
2376
2304
2268
2196
2124
2052
Bottom
Medium
2808
2736
2664
2628
2520
2448
2340
2232
2124
discharge
High
3078
3024
2952
2880
2772
2700
2556
2484
2340