Amana CKF60 Operations Instructions download pdf (Page 8)

6. Remove the service gauge set’s lines carefully - Escap-

ing liquid refrigerant can cause burns.

CAUTION

To prevent personal injury, carefully connect and disconnect

manifold gauge hoses. Escaping liquid refrigerant can cause

burns. Do not vent refrigerant into the atmosphere. Recover

all refrigerant during system repair and before final unit

disposal.

HEAT PUMP HEATING CYCLE

Weighing In Charge

As in the cooling mode the proper method of insuring that the

system is properly charged is by weight with the additional

charge adjustments for line size, line length, and other system

components as previously indicated.

STARTUP PROCEDURE AND CHECK LIST

Begin with power turned off at all disconnects.

1. Set first-stage thermostat heat anticipator to .12 (amps)

and turn thermostat system switch to “Cool” and fan switch

to “Auto”.

2. Turn cooling temperature setting as high as it will go.

3. Inspect all registers and set them to the normal open po-

sition.

4. Turn on the unit electrical supply at the fused disconnect

switch, both for the indoor unit and the outdoor unit.

5. Turn the fan switch to the “On” position. The blower should

operate 10 to 15 seconds later.

6. Turn the fan switch to the “Auto” position. The blower

should stop 90 seconds later.

Note: If outdoor temperature is below 12.8°C, proceed to

step 9. Do not check out in the cooling mode.

7. Slowly lower the cooling temperature until the first mer-

cury bulb makes contact. The compressor, indoor blower,

and outdoor fan should now be running. Make sure cool

air is supplied by the unit.

8. Turn system switch to “Heat” and fan switch to “Auto”.

9. Slowly raise the heating temperature setting. After the heat-

ing first-stage mercury bulb (upper) makes contact, stop

moving the lever. The compressor, indoor blower and out-

door fan should now be running. After giving the unit time

to settle out, make sure heated air is being supplied by

the indoor unit.

10. If the outdoor ambient is above 21.1°C, the compressor

may trip on internal overload.

11. In the event that the outdoor ambient is too high to allow

a thorough heating cycle check, postpone the test until

another day when conditions are more suitable...but —

DO NOT FAIL TO TEST.

12. If unit operates properly on the heating cycle, raise the

heating temperature setting high enough until the heat-

ing second-stage mercury bulb (lower) makes contact.

13. Supplementary resistance heat, if installed, should now

come on. Make sure it is operating correctly. If outdoor

thermostats are installed, the outdoor ambient must be

below the set point of these thermostats for heaters to

operate. It may be necessary to jumper these thermo-

stats to check heater operation if outdoor ambient is mild.

14. For thermostats with emergency heat switch, return to

startup (item #9). The emergency heat switch is located

at the bottom of the thermostat. Move this switch to emer-

gency heat. The heat pump will stop, the indoor blower

will continue to run, all heaters will come on and the ther-

mostat emergency heat light will come on.

15. If checking the unit on the heating cycle in the winter-

time, when the outdoor coil is cold enough to actuate the

defrost control, observe at least one defrost cycle to make

sure the unit defrosts properly.

16. Check to see if all supply and return air grilles are ad-

justed and air distribution system is balanced for the best

compromise between heating and cooling.

17. Check for air leaks in the ductwork.

18. Make sure the heat pump is free of “rattles”, and the tub-

ing in the unit is free from excessive vibration. Also make

sure lines are not rubbing against each other or sheet

metal surfaces or edges. If so, correct the trouble.

19. Set thermostat at the appropriate setting for cooling and

heating or automatic changeover for normal use.

20. Be sure the owner is instructed on the unit operation,

filter servicing, correct thermostat operation, etc.

The foregoing “Start-up Procedure and Check List” is recom-

mended to serve as an indication that the heat pump system

will operate normally.

COMPONENTS:

1. Contactor - This control is activated (closed) by the room

t-stat for both heating and cooling. It is de-energized (open)

during emergency heat. The contactor has a 24 volt coil

and supplies power to the compressor and outdoor fan

motor.

2. Crankcase Heater - This item is on whenever power is

supplied to the outdoor unit. It warms the compressor

crankcase, thereby preventing liquid migration and sub-

sequent compressor damage. It is connected electrically

to the contactor L1 and L2 terminals.

3. Condenser motor - The condenser motor is activated by

the contactor during heating and cooling except during

defrost and emergency heat operation.

4. Compressor - This item is activated by the contactor for

heating and cooling except during emergency heat. It is

protected by an internal overload.

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Amana CKF60 Operations Instructions Page 8

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