Lennox SCA 010 - Page 28

IOM / Rooftop Smart and Linéa™ Range - Page 27
COMMISSIONINGCOMMISSIONING
COMMISSIONINGCOMMISSIONING
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