Lennox SLP99UHV Series

Page 14
BLOWER DATA
SLP99UH090XV60C BLOWER PERFORMANCE (less lter)
SINGLE SIDE RETURN AIR − Air volumes in bold require Optional Return Air Base and eld fabricated transition to accommodate
20 x 25 x 1 in. air lter in order to maintain proper air velocity.
HEATING BLOWER PERFORMANCE - 0 through 0.8 in. w.g. External Static Pressure Range
Heating Adjust CFM Selections
Heating Input Range and Blower Volume - CFM
35% 40% 50% 60% 70% 80% 90% 100%
Increase (+15%) Heat CFM 609 684 835 986 1136 1287 1437 1588
Increase (+7.5%) Heat CFM 551 623 769 914 1059 1205 1350 1496
Default Heat CFM 492 562 702 842 983 1123 1263 1403
Decrease (-7.5% ) Heat CFM 436 502 633 765 896 1028 1159 1291
Decrease (-15% ) Heat CFM 380 441 564 687 810 932 1055 1178
COOLING BLOWER PERFORMANCE - 0 through 1.0 in. w.g. External Static Pressure Range
Cooling Adjust CFM
Selections
Blower Speed Selections
First Stage Cool Speed - cfm Second Stage Cool Speed - cfm
Low Medium-
Low
Medium
High
High
(Default)
Low Medium-
Low
Medium
High
High
(Default)
Increase (+10%) Cool CFM 1040 1225 1380 1550 1555 1715 1920 2135
Default Cool CFM 960 1085 1225 1415 1430 1565 1790 1980
Decrease (-10%) Cool CFM 840 990 1085 1250 1280 1450 1580 1790
The e󰀨ect of static pressure is included in air volumes shown.
The following control congurations are available. See Installation Instructions for details and DIP switch settings.
Heat Modes Available (Heating Blower Performance Table):
Single stage thermostat:
- 35%, 70%, 100% input (three-stage) with time delays in-between.
Two-stage thermostat:
- Variable Rate Capacity Mode - furnace automatically adjusts ring rate based on rst- and second-stage cycle times.
- W1 demand at 70% input, W2 demand at 100% input. No delay between stages.
Cool Mode Available (Cooling Blower Performance table):
First stage COOL (two-stage air conditioning units only) is approximately 70% of the same second stage COOL speed position.
Continuous Fan speeds are approximately 28% and 38% (DIP switch selectable) of the same second-stage COOL speed position.
minimum 380 cfm.
Lennox iHarmony
®
Zoning System Applications - Minimum blower speed is 450 cfm.