Friedrich R410A manual Service, CUT/SEVER Hazard

REMOTE WALL THERMOSTAT LOCATION

The thermostat should not be mounted where it may be affected by drafts, discharge air from registers (hot or cold), or heat radiated from the sun appliances, windows etc.. The thermostat should be located about 5 Ft. above the floor in an area of average temperature, with good air circulation.

Mercury bulb type thermostats MUST be level to control temperature accurately to the desired set-point. Electronic digital type thermostats should be level for aesthetics.

Note: An improperly operating or poorly located remote wall thermostat can be the source of perceived equipment problems. A careful check of the thermostat’s location and wiring must be made then to ensure that it is not the source of problems.

Desk Control

The unit’s electronic control has built-in provisions for connection to an external switch to control power to the unit. The switch can be a central desk control system or even a normally open door switch.

For desk control operation, connect one side of the switch to the D1 terminal and the other to the D2 terminal (See page 12). Whenever the switch closes, the unit operation will stop.

Maximum Wire Length for Desk Control Switch

SERVICE

WARNING

ELECTRIC SHOCK HAZARD

Turn off electric power before service or installation.

Extreme care must be used, if it becomes necessary to work on equipment with power applied.

Failure to do so could result in serious injury or death.

CAUTION

CUT/SEVER HAZARD

Be careful with the sharp edges and corners.

Wear protective clothing and gloves, etc.

Failure to do so could result in minor to moderate injury.

Servicing/ChassisQuickChangeouts

.

To Remove the Chassis from the Closet:

A.Disconnect the power coming into the unit from the main breaker panel or the closet mounted disconnect.

B.Switch the wall Thermostat off.

C.Pull the Power Disconnect located in the front of the chassis.

D.Disconnect the electrical connection.

E.Disconnect the duct work.

F.Disconnect condensate drain on 9-18,000 BTU models.

G.Slide the chassis out of the wall plenum.

H.Lift the chassis out of the utility closet.

Warranty

Auxiliary Fan Control

The electronic control also has the ability to control a 24 VAC relay to activate an auxiliary, or transfer fan. The outputs are listed as F1 and F2 on the interface connector (See page 12).

To connect the relay, simply wire one side of the relay to F1 and the other side to F2. Anytime that the fan runs, the terminals will send a 24 VAC signal to the relay. The relay must be 24 VAC, 50mA or less.

Note: The Desk Control, Auxiliary Fan relay and wires must be field supplied.

13