Carrier 100/A Series Installation, Start-Up, Operating And Service And Maintenance Instructions page 19

SUPPLY
AIR
RETURN
AIR
UPFLOW RETURN AiR CONFIGURATIONS AND RESTRiCTiONS
AIR FLOW MODELS RETURN AIR RETURN AIR RETURN AIR RETURN AIR
CONNECTION 1 CONNECTION 2 CONNECTION 3 COMBINATIONS
ONLY ONLY ONLY OF 1, 2, AND 3
066.060, -22 AND YES YES YES YES
-20 MODELS
ALL OTHER MODELS YES YES YES YES
.................................................... P
TO
Fig. 18 - Upflow Return Air Configurations and Restrictions
A02075
il
1_ RETURN
AIR
®
RETURN
AIR
DOWNFLOWRETURNAIRCONFIGURATIONSAND RESTRICTIONS
AiR FLOW MODELS RETURN AIR RETURN AIR RETURN AiR RETURN AIR
CONNECTION 1 CONNECTION 2 CONNECTION 3 COMBINATIONS
ONLY ONLY ONLY OF 1,2, AND 3
066,060, -22 AND YES NO NO NO
-20 MODELS
ALL OTHER MODELS YES NO NO NO
Fig. 19 - Downflow Return Air Configurations and Restrictions
A02163
19