Carrier WEATHERMASTER III 38HQ - Manual (Page 7)

FAN CONTROL PACKAGE
C-2
IFR
PL
SEQ
TB
Tran
o
LEGEND
Contactor
Indoor Fan Relay
Plug, Fan
Sequencer
Terminal Board
Transformer
Junction
Component Connection (Marked)
Field Splice
Field Power Wiring
Field Ground Wiring
Field Control Wiring
NOTES;
1
2
Use copper conductors only.
May be terminal board or fuse block depending
on heater model used
Will be terminal no 4 on 40FQ916 models,
and terminal no 6 on 40FQ920 models
THERMOSTAT 40FQ
SUBBASE ELECTRIC HEATER
HH93AZ0730R TERMINAL
HH93AZ075 BOARD
38HQ
COMPRESSOR
SECTION
TERMINAL BOARD
THERMOSTAT
SUBBASE
HH93AZ073 OR
HH93AZ075
40 FQ
ELECTRIC HEATER
TERMINAL
BOARD
38H0
COMPRESSOR
SECTION
TERMINAL BOARD
EOUIPPEDWITH ELECTRIC HEATER;
EMERGENCY HEAT, ONE OUTDOOR THERMOSTAT)
THERMOSTAT
SUBBASE
HH93AZ073 OR
HH93AZ075
40FQ
ELECTRIC HEATER
TERMINAL
BOARD
38H0
COMPRESSOR
SECTION
TERMINAL BOARD
COOLING AND TWO-STAGE HEATING
(38H0 WITH 40FS/28H0.V0
EOUIPPED WITH ELECTRIC HEATER;
EMERGENCY HEAT, NO OUTDOOR THERMOSTATS)
DFT — Defrost Thermostat
EHR — Emergency Fleet Relay
OA — Outdoor Ambient Switch
ODT — Outdoor Thermostat
_______ Factory Wiring
_______ Field Wiring
THERMOSTAT 40FQ 38HQ
SUBBASE ELECTRIC HEATER COMPRESSOR
HH93AZ0730R TERMINAL SECTION
HH93AZ075 BOARD TERMINAL BOARD
(38HQWITH 40FS/28HQ/VQ
EQUIPPED WITH ELECTRIC HEATER;
EMERGENCY HEAT, TWO OUTDOOR THERMOSTATS)
"Transformer (75 va) located in fan control package
fTerminal L is identified as terminal X on some former thermostats (Required for system
malfunction warning indicator on compressor section )
fRemove 1 or both factory-installed jumpers (connection B) when installing outdoor ther­
mostats (ODT) shown in connections C and D
Fig. 7 — Control Circuit Connections