CellarPro AH12S Series, Manual

Page: 15 / 33

V12.21
15
Installation Instructions

Unit Clearance: The evaporator supply and return openings should be located at least 24 inches from any
obstructions for proper airflow on non-ducted units. The left side electrical enclosure and right side access
panels should be located at least 24 inches from any obstructions for service access. Reference the
Condensing Unit Dimensional Data drawing for required condensing unit clearances.

Mounting the Evaporator: Mount to a support s
tructure using 5/16” or 3/4” threaded rod, passing through
the mounting angle and optional vibration isolator (by others) in the four mounting locations. The unit can be
ceiling hung or floor mounted,,but it must be secured to the support structure through the mounting angles.

Gravity Drain Line: The condensate drain trap must be properly designed to ensure the removal of
condensate; incorrect trapping can hold water in the pan causing system shut down, or possible condensate
overflow. Be sure the external condensate drain line pitches downward at a slope of one inch every ten feet,
and terminates to an open drain. When installing make sure to properly level the unit to maintain proper
condensate drainage. If using the optional internal condensate pump, the drain connection can remain capped.

Condensing Unit Flooded Start Protection (Bump Start): On initial startup, the compressor will cycle
through a series of 3 short start and stops. The compressor will cycle on for 2 seconds, then off for 15 seconds.
This process protects against flooded starts, and occurs any time power is lost and reapplied to the unit, or
any time the unit is off for more than 4 hours and the ambient temperature is below 95°F.

Evaporator Ducting: Duct adapters and ducting provided by others. Design to the following guidelines:
Evaporator Module Duct Guidelines
Model
Airflow
(CFM)
Flex Duct diameter (in)
100ft maximum equivalent length
R-6 insulation
Hard Duct minimum cross sectional area (in^2)
Maximum external static pressure 0.3"wg
R-6 insulation
AH12Sx 1175 12 113
AH18Sx 1300 14 153
AH24Sx 1300 14 153
Threaded rod
Mounting angle
Vibration Isolator
Double Nut (jam nut)