Service Manual

ManualsBrandsGoodman ManualsCentral Air & Heating3 Ton 18 SEER 80% AFUE 100,000 BTU Gas Furnace and Air Conditioner System - Upflow

PRODUCT DESIGN

Select the desired “adjust” tap by positioning switches

3 and 4 appropriately. To enable adjustments and se-

lect -5, 5, -10 or 10% trim, you must set dipswitch S5-

2 to ON. If S5-2 is in the OFF position, you will receive

0% trim. Refer to the following figure for switch posi-

tions and their corresponding taps. Verify CFM by not-

ing the number displayed on the dual 7-segment LED

display.

6. The multi-speed circulator blower also offers several cus-

tom ON/OFF ramping profiles. These profiles may be

used to enhance cooling performance and increase com-

fort level. The ramping profiles are selected using DIP

switches S4- 1, 2. Refer to the following figure for switch

positions and their corresponding taps. Refer to the bul-

let points below for a description of each ramping pro-

file. Verify CFM by noting the number displayed on the

dual 7-segment LED display.

A* OFF OFF

BONOFF

COFFON

DONON

Switch Bank: S4

DIP Switch No.

(*Indicates factory setting)

Ramping

Profiles

7. Select the heating speed for your model from the heat-

ing speed chart in the Specification Sheet. The adjust

setting (already established by the cooling speed se-

lection) determines which set of speeds are available.

The selected speed must provide a temperature rise

within the rise range listed with the particular model.

Example: If the GMVC80604B is set for 1210 CFM

on cooling, the “ADJUST” is set to “+”

(plus). The four heating speeds available

are “A Plus”, “B Plus”, “C Plus”, and “D

Plus”. “A Plus” has a rise of 38°F for both

stages which is within the 20-50°F rise

range for the GMVC80604B. This setting

will keep electrical consumption to a mini-

mum. Set the “Heat” speed DIP switches

to “A”.

8. Select the desired “heating” speed tap by positioning

switches S4- 3, 4 appropriately. Refer to figure above.

Verify CFM by noting the number displayed on the dual

7-segment LED display.

In general lower heating speeds will: reduce electrical con-

sumption, lower operating sound levels of the blower, and

increase the outlet air temperature delivered to the home.

The speeds available allow the blower performance to be

optimized for the particular homeowner’s needs.

AOFFOFF

B* ON OFF

COFFON

DONON

(*Indicates factory setting)

Switch Bank: S4

Heating

CFM

DIP Switch No.

PCBKF103 / PCBKF104 / PCBKF105

• Profile A provides only an OFF delay of one (1) minute

at 100% of the cooling demand airflow.

OFF

100% CFM 100% CFM

1 min

OFF

• Profile B ramps up to full cooling demand airflow by

first stepping up to 50% of the full demand for 30 sec-

onds. The motor then ramps to 100% of the required

airflow. A one (1) minute OFF delay at 100% of the

cooling airflow is provided.

50% CFM

1/2 min

100% CFM

1 min

OFF

• Profile C ramps up to 85% of the full cooling demand

airflow and operates there for approximately 7 1/2 min-

utes. The motor then steps up to the full demand

airflow. Profile C also has a one (1) minute 100% OFF

delay.

100% CFM

OFF

Add 5% OFF OFF

Minus 5% ON OFF

Add 10% OFF ON

Minus10% ON ON

Trim Amount

SWITCH