Lennox 16B27 User Manual

Page 17
CBA38MV-060 BLOWER PERFORMANCE
0 through 0.80 in. w.g. External Static Pressure Range
“ADJUST”
Jumper
Setting
Jumper Speed Positions
“HEAT” Speed “COOL” Speed
1 2 3 4 1 2 3 4
cfm cfm cfm cfm cfm cfm cfm cfm
+ 1640 1840 2075 2150 1640 1840 2075 2150
NORM 1465 1625 1800 2000 1465 1625 1800 2000
– 1250 1390 1560 1720 1250 1390 1560 1720
NOTES - The effect of static pressure, lter and electric heater resistance is included in the air volumes listed.
First stage cooling air volume is 70% of COOL speed setting. Continuous fan speed is approximately 28%, 38%, 70% and 100% (Jumper selectable) of the
same second-stage COOL speed selected, minimum 450 cfm.
Lennox iHarmony
®
Zoning System applications - minimum blower speed is 450 cfm.
Unit Operating Sequences
This section details unit operating sequence for non-communicating systems. For communicating systems, see the
iComfort
®
thermostat installation instruction.
Table 10. Air Handler with ComfortSense 7500 Thermostat and Single-Stage Outdoor
Unit Operating Sequence
Operating Sequence System Demand System Response
System
Condition
Step
Thermostat Demand Relative Humidity
Comp
Air Han-
dler CFM
(COOL)
Comments
Y1 Y2 O G W1 W2 Status D
NO CALL FOR DEHUMIDIFICATION
Normal
Operation
1 On On On Acceptable 24 VAC High 100%
Compressor and indoor
air handler follow ther-
mostat demand
BASIC MODE (Only active on a Y1 thermostat demand)
Normal
Operation
1 On On On Acceptable 24 VAC High 100%
ComfortSense 7500
thermostat energizes Y1
and de-energizes D on a
call for dehumidication.
NOTE: No over cool-
ing.
Dehumidication
Call
2 On On On Demand 0 VAC High 70%
PRECISION MODE (Operates independent of a Y1 thermostat demand)
Normal
Operation
1 On On On Acceptable 24 VAC High 100%
Dehumidication mode
begins when humidity is
greater than set point
Dehumidication
call
2 On On On Demand 0 VAC High 70%
Dehumidication
call ONLY
1 On On On Demand 0 VAC High 70%
ComfortSense 7500
will keep outdoor unit
energized after cooling
temperature setpoint has
been reach in order to
maintain room humidity
setpoint.
NOTE: Allow to over
cool 20F from
cooling set
point.

Lennox 16B27 Specifications

General

Brand	Lennox
Model	16B27
Category	Heat Pump
Language	English