Carrier Moduline 37HS Series - Minimum and Maximum Airflow Adjustments; Maximum Airflow Adjustment; Minimum Airflow (Cfm) Adjustment

To set maximum cfm with zero minimum cfm:
1. Set diffuser or wall thermostat for maximum cooling.
2. Turn the minimum cfm star wheel counterclockwise un-
til the internal stop is reached. Do not attempt to override
stop. (Minimum cfm has been set at zero, and the unit
will turn off when required.)
3. Adjust maximum cfm lever to desired percent cfm.
Minimum Airflow (Cfm) Adjustment— Some applications
require both a design maximum cfm and a minimum cfm.
The 37HS controller can be set to provide both airflow
requirements.
To set maximum and minimum cfm:
1. Set diffuser or wall thermostat for maximum cooling.
2. Turn the minimum cfm star wheel counterclockwise un-
til the internal stop is reached. Do not attempt to override
stop.
3. Shut off unit by adjusting thermostat to zero cooling, or
disconnect tube from volume controller to thermostat.
4. Place a standard airflow hood against the outlet of the
master unit and slowly turn the minimum cfm star wheel
on the controller clockwise until the desired minimum cfm
is reached.
5. Return the thermostat to the desired setting and/or recon-
nect tube between volume controller and thermostat.
6. Adjust maximum cfm lever to desired percent cfm.
CFM
100
120
80
40
%
HK08ZZ030
MAXIMUM CFM LEVER VOLUME CONTROLLER
S
O
OPEN
MINIMUM CFM
STAR WHEEL
S
O
CFM
120
100
80
40
%
Fig. 39 — Minimum and Maximum
Airflow Adjustments, 37HS Controller
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