Honeywell S9240F1004 Installation Instructions Manual page 23

S9240F1004 MODULATING HOT SURFACE IGNITION INTEGRATED FURNACE CONTROL
5. Call for Cooling
1st Stage Cooling
Request Received
Energize 1st Stage
Cooling Contactor
(Compressor & Fan)
Circulator ON After
2 Second Delay
Energize Circulator
(Per Ramping Profile)
1
2nd Stage
Cooling
Request?
YES
Energize 2nd Stage
Cooling Contactor
(Compressor & Fan)
2nd Stage
Cooling Request
Still Active?
NO
De-Energize 2nd
Stage Cooling
Contactor
(Compressor & Fan)
1st Stage
Cooling Request
Still Active?
NO
De-Energize 1st
Stage Cooling
Contactor
(Compressor & Fan)
De-energize Circulator
Per Ramping Profile
1
2ND STAGE COOLING OPERATION REQUIRES A 2-STAGE THERMOSTAT, A 2-STAGE
COOLING SYSTEM, AND JUMPER W915 MUST BE CUT. THE CONTROL WILL NOT RESPOND TO
A 2ND STAGE COOLING REQUEST UNLESS A 1ST STAGE COOLING REQUEST IS ACTIVE.
2 CIRCULATOR LOW COOLING MODE AND HIGH COOLING MODE HAVE SPECIFIC ON, OFF,
AND SPEED RAMPING PROFILES. THE SPECIFIC PROFILE IS SELECTED USING THE
DIP SWITCHES ON THE CONTROL.
Fig. 13. S9240F IFC sequence Cooling Mode cycle.
5
1
2
NO
YES
Energize Circulator
(High Cooling mode)
2
Maintain Circulator
YES
(High Cooling mode)
Energize and
YES Maintain Circulator at
Low Cooling mode
2
23
YES
1st Stage
Cooling Request
Still Active?
NO
M28158
69-2088—01