White Rodgers 1F85-277 Anleitung zur Fehlerbehebung PDF herunterladen (Seite 128)

stem Mode Indicator Power Indicator LED

HVAC Equipment

Connections

Automatic Resetting

Fuse

Zone Calling Indicators

Mounting Keyholes

Two at Top also.

Zone Terminal

Blocks for Zone

Dampers

24V Transformer

Terminal Blocks

Zone Terminal

Blocks for Zone

Thermostats

CLAS and COAS

Terminal Blocks

Sensor Limits

Installation

Operation

Set-Up for Various HVAC Equipment

Leaving Air Sensor

Outdoor Air Sensor

Timers

Checkout

Wiring

Troubleshooting

Wiring Diagram

INSTALLATION

The CMM-3U Control is a three (3) zone control panel that can be

used with conventional single stage, two stage heating and cool-

ing, heat pumps with or without dual fuel and up to three stages of

heating. The CMM-3U panel is the central control panel that all zone

dampers, zone thermostats, Heat Pump Controls, power transformer,

Outdoor Air Sensor and Leaving Air Sensor are wired.

When installing the CMM-3U panel it is important to pick a central

location where it is most convenient to bring all the wires. Most often

this is at the furnace or air handler. It is often the most convenient

location and closest to power, the HVAC unit controls and the zone

dampers when typically located at or near the plenum.

The CMM-3U panel case is made of sturdy ABS plastic and can

be mounted to any ﬂat surface. It is recommended that the panel

be mounted to a wall or return plenum and NOT on the furnace or

plenum where it will be in contact with the excessive hot tempera-

tures.. The panel can be located in an attic space or in an enclosed

cabinet of a rooftop unit. Insure the panel is not in direct exposure to

the elements.

The cover easily removes from the case by pulling ﬁrmly and sepa-

rating the cover from the case exposing the circuit board. There are

4 key-hole mounting points in each corner of the case. The case

has openings in the rear of the case as well as the side for all wiring.

Wiring can come from the back as well as the side in order to make a

neat installation.

OPERATION

The CMM-3U can be controlled by conventional single stage or heat

pump thermostats. Each thermostat can then call for heating, cool-

ing or the fan. When a thermostat calls the panel will keep open the

damper to the calling zone, if not already open, close the dampers to

the zone(s) not calling and activate the appropriate HVAC equipment.

When opposite calls exist for both heating and cooling the panel will

allow the zones to automatically switch between the modes. When all

zones are

satisﬁed the panel then looks for individual fan calls from

any zone and controls the dampers based on these calls as well.

When all zone thermostats are not calling for heating, cooling or the

fan all dampers will return to a normally open position.

Once a call for either heating or cooling is made the panel will open

the damper(s) to the zone(s) calling, close the damper(s) to those

zones not calling, activate the appropriate controls for heating or

cooling, whichever is being called and not accept any calls for the

opposite mode.

Any calls for the opposite mode will be locked out until the initial

mode is either satisﬁed or a period of time has elapsed that is sufﬁ-

cient for the ﬁrst mode to satisfy, a maximum of 20 minutes. A unique

sequence determines the time the unit has been running or needs to

CMM-3U

CMM-3UKZONE PANEL

TECHNICAL HELP

www.white-rodgers.com

251

1 2 ... 123 124 125 126 127 128 129 130 131 132 133 134

Kommentare zu diesen Handbüchern

Keine Kommentare

White Rodgers 1F85-277 Anleitung zur Fehlerbehebung Seite 128

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Split-System-Klimaanlagen White Rodgers 1F85-277