5
CM35xx Controller Quick Start
1. Introduction
and
Overview
In our efforts to bring the latest technologies to the dehumidifi cation industry, your Desert Aire dehumidifi er
may come with a CM35xx control system. The two x’s in our nomenclature indicate that we offer multiple
versions within this family of controllers. The general form of the controller numbering system is:
• CM3500 for IAQ (QS/QV) products
• CM3510 for ND/SA products
• CM3520 for QM products
• CM3530 for LC/LV products
This document is meant to cover the commonality of the above control systems. While not providing
specifi c menu-to-menu detail, it will provide a means for viewing the menu structure in your controller.
This document has been created to allow the operator to navigate the menu structure, set the internal
occupancy schedule, view pertinent system data, and modify setpoints. It can also be used by an
experienced technician to review the basic operation of CM35xx systems.
Differing dehumidifi ers will use a different combination of CM35xx control devices. Some units will come
with a controller that has a display that’s internal to the controller (i.e. internal display terminal or IDT) and
some will come with a remote display terminal (RDT). Although the placement of the keys for these two
options is different, the key functions are exactly the same. Figure 1 shows an RDT and Figure 2 shows
an IDT. The ND/SA and LC products will use the RDT and the QM will use the IDT. The IAQ products will
use a combination of RDTs and IDTs, typically depending on the physical placement of the controller in the
unit. If the controller is mounted too low to comfortably view an IDT, an RDT will be provided for mounting
where convenient for the user. Also note that an RDT can be plugged into port J10 even with an IDT
and used for remote mounting if desired.
2.
Mounting the Remote Display Terminal (RDT)
The remote terminal must be located in a dry, non-corrosive environment. Operating conditions must
be between 0° F and 140° F and less than 90% RH. Moisture or concentrated pool chemicals can
damage the circuitry of the RDT. The RDT can either be affi xed directly to the dehumidifi er or located
up to 20 feet away using the cable that came with the display.
2.1
Installing
the
RDT
The remote terminal is an IP40 device and is powered through the cable provided. If a longer
length is required, a standard 24 AWG, 6 conductor phone cable may be used up to 150 feet.
For location of the sensor up to 1,500 feet, use 22 AWG, 3 twisted pair cable. See your wiring
schematic for connection details.
Desert Aire - CM35xx Quick Start Guide