Warning, Startup, adjustments, and checks – Goodman Mfg IO - 395 User Manual

Page 8

BRANCH CIRCUIT AMPACITY

SUPPLY WIRE LENGTH -

FEET

200

150

100

2. Wire size based on 60° C rated wire insulation and 30° C

Ambient Temperature (86° F).

3. For more than 3 conductors in a raceway or cable, see the

N.E.C. for derating the ampacity of each conductor.

STARTUP, ADJUSTMENTS, AND CHECKS

WARNING

HIGH

VOLTAGE

ISCONNECT

ALL

POWER BEFORE SERVICING OR INSTALLING

THIS UNIT.

ULTIPLE POWER SOURCES MAY BE PRESENT. FAILURE

TO DO SO MAY CAUSE PROPERTY DAMAGE, PERSONAL INJURY OR

DEATH.

TART

-U

ROCEDURE

AND

HECKLIST

With power turned off at all disconnects:

1. Turn thermostat system switch to “COOL” and fan switch

to “AUTO”. Next, turn the temperature setting as high as it
will go.

2. Inspect all registers and set them to the normal open

position.

3. Turn on the electrical supply at the disconnect.

4. Turn the fan switch to the “ON” position. The blower should

operate after a 7-second delay.

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

stop after a 65-second delay.

6. Slowly lower the cooling temperature until the unit starts.

The compressor, blower and fan should now be operating.
Allow the unit to run 10 minutes, make sure cool air is being
supplied by the unit.

7. Turn the temperature setting to the highest position,

stopping the unit. The indoor blower will continue to run for
65-seconds.

8. Turn the thermostat system switch to “OFF” and disconnect

all power when servicing the unit.

EAT

UMP

TART

-U

ROCEDURE

1. Check the cooling mode for the heat pump in the same

manner as above. The reversing valve is energized when
the thermostat is placed in the cooling position. A clicking
sound should be noticeable from the reversing valve. By
lowering the temperature setting to call for cooling, the
contractor is energized. The compressor, blower and fan
should then be running. After the cooling mode is checked
out, turn the thermostat system switch to “OFF”.

2. Turn the thermostat system switch to “HEAT” and fan switch

to “AUTO”.

3. Slowly raise the heating temperature setting. When the

heating first stage makes contact, stop raising the
temperature setting.. The compressor, blower and fan
should now be running with the reversing valve in the de-
energized (heating) position. After giving the unit time to
settle out, make sure the unit is supplying heated air.

4. If the outdoor ambient is above 80°F, the unit may trip on its

high pressure cut out when on heating. The compressor
should stop. The heating cycle must be thoroughly
checked, so postpone the test to another day when
conditions are more suitable. DO NOT FAIL TO TEST.

5. If the outdoor ambient is low and the unit operates properly

on the heating cycle, you may check the pressure cutout
operation by blocking off the indoor return air until the unit
trips.

6. If unit operates properly in the heating cycle, raise the

temperature setting until the heating second stage makes
contact. Supplemental resistance heat, if installed should
now come on. Make sure it operates properly.

NOTE: If outdoor thermostats are installed, the outdoor
ambient must be below the set point of these thermostats
for the heaters to operate. It may be necessary to jumper
these thermostats to check heater operation if outdoor
ambient is mild.

7. For thermostats with emergency heat switch, return to step

6. The emergency heat switch is located at the bottom of
the thermostat. Move the switch to emergency heat. The
heat pump will stop, the blower will continue to run, all
heaters will come on and the thermostat emergency heat
light will come on. 3-phase models are single stage heat
only.

8. If checking the unit in the wintertime, when the outdoor coil

is cold enough to actuate the defrost control, observe at
least one defrost cycle to make sure the unit defrosts
completely.

INAL

YSTEM

HECKS

1. Check to see if all supply and return air grilles are adjusted

and the air distribution system is balanced for the best
compromise between heating and cooling.

2. Check for air leaks in the ductwork.

3. See Sections on Air Flow Measurement and Adjustment

and Checking Charge.

4. Make sure the unit is free of “rattles”, and the tubing in the

unit is free from excessive vibration. Also make sure tubes
or lines are not rubbing against each other or sheet metal
surfaces or edges. If so, correct the trouble.

5. Set the thermostat at the appropriate setting for cooling

and heating or automatic changeover for normal use.

6. 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 unit will operate nor-
mally.

C O M P O N E N T S

Contactor
This control is activated (closed) by the room thermostat for both
heating and cooling. The contactor has a 24V coil and supplies
power to the compressor and outdoor fan motor.