Amana GUIA070A30 Service Instructions Manual page 59

Timing Charts For GUIV Variable Speed Two Stage
GUIV Example 1: Continuous Call For Low Stage Heat Only
Air
High
Circulator
Low
Blower
Off
Gas Valve
On
Off
On
Ignitor
Off
PS2 Closed
PS1 Closed
Pressure
Open
Switches
High
Low
Induced Draft
Off
Blower
High
Low
Thermostat
Off
GUIV Example 2: Continuous Call For High Stage Heat Only
Air
High
Circulator
Low
Blower Off
High
Gas Valve
Low
Off
Ignitor
On
Off
PS2 Closed
Pressure PS1 Closed
Switches
Open
High
Induced Draft Low
Blower
Off
High
Thermostat Low
Off
SYSTEM OPERATION
Integrated Ignition Control Operation
0 10 27 31 34
0 10 27 31 34
64 94 0 5
64 94 0 5
30 60, 90 90, 120,
120, or 150, or
180 210
30 60, 90 90, 120,
120, or 150, or
180 210
59
Rev. 2