Rheem RASL-JEC Spezifikationen PDF herunterladen (Seite 17)

8.3 Comfort Control

System™ Control Operation

A Dual Drive unit has two controls instead of a single control. The controls are the

same as any residential communicating control except the secondary control dip-

switches (SW5) should be in the off position. Therefore, the features such as fault

recall and the operation of the test button are the same as any JEC control.

The two controls are identical and interchangeable, but the memory cards that

attach to the controls are not interchangeable. This allows the controls to be

swapped for troubleshooting if one of the controls is suspected of being defective. If

the controls are swapped, it is important to keep the memory cards in the proper

locations. Do not cut the tethers on the memory cards!

8.4 Lead/Lag

Tandem compressor ASL units now have a Lead/Lag functionality built into the con-

trol software. The purpose of Lead/Lag is to average the runtime of the compres-

sors to give the homeowner the greatest compressor life possible. Upon receiving a

first stage call, the primary compressor control (the control on the left as you face

the control box) will alternate which compressor services the call. An example of

Lead/Lag is: if compressor A is energized on one first stage call, compressor B

would normally service the next first stage call.

9.0 COMPRESSOR CRANKCASE HEAT (CCH)

CCH is standard on these models due to refrigerant migration during the off cycle

that can result in a noisy start up.

Crankcase Heater Operation:

Supplemental Crankcase heat is required to prevent refrigerant migration in sys-

tems with relatively high system refrigerant charges. Each Dual Drive compressor

has its own crankcase heater.

The crankcase heater control is integrated into the Comfort Control

System™ and

is designed for maximum energy savings.

Summary of operation:

• The crankcase heater is off whenever the compressor is running.

• Once the compressor turns off, the crankcase heater control (CCH) begins the

two-hour timer countdown.

• If the compressor stays off for two hours, the CCH turns on the crankcase heater.

All heaters are located on the lower half of the compressor shell. Its purpose is to

drive refrigerant from the compressor shell during long off cycles, thus preventing

damage to the compressor during start-up.

At initial start-up or after extended shutdown periods, make sure the heater is ener-

gized for at least 12 hours before the compressor is started. (Disconnect switch on

and wall thermostat off.)

10.0 HARD START COMPONENTS

Factory-installed start components are standard on all models.

11.0 HIGH AND LOW PRESSURE CONTROLS

10.0 (HPC AND LPC)

These controls keep the compressor from operating in pressure ranges which can

cause damage to the compressor. Both controls are in the low voltage control cir-

cuit.

High pressure control (HPC) is an automatic-reset which opens near 610 PSIG and

closes near 420 PSIG.

The low pressure control (LPC) is an automatic-reset which opens near 50 PSIG

and closes near 95 PSIG.

NOTE: HPC and LPC are monitored by the Comfort Control

System™. See

Section 12.0.

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 32 33

Kommentare zu diesen Handbüchern

Keine Kommentare

Rheem RASL-JEC Spezifikationen Seite 17

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Split-System-Klimaanlagen Rheem RASL-JEC