L.B. White Therma Grow HW120 Owner's Manual And Instructions page 12

B. Single Stage Thermostat
1. Operate on first stage heat only.
BLACK
GREEN
GROUND
24V
TRANSFORMER
YELLOW
120V
BROWN
HIGH LIMIT SWITCH
2. Operate on second stage heat only.
WHITE
BLACK
GREEN
GROUND
24V
TRANSFORMER
120V
BROWN
12
SINGLE STAGE
THERMOSTAT
YELLOW
BLUE
GREEN
RED
GROUND
IND
L1
HSI
HSIG
L2
W IGNITION CONTROL
PSI
FSI
GV
PSO
FSG
C
GAS CONTROL VALVE
BROWN
LO
RED
HI
GREEN
C
LEAVE WIRE
GROUND
NUT ON LEAD
SINGLE STAGE
THERMOSTAT
YELLOW
BLUE
GREEN
GAS CONTROL VALVE
RED
C
RED
HI
LO
IND
L1
HIGH LIMIT SWITCH
HSI
HSIG
L2
W
IGNITION CONTROL
PSI
FSI
GV
PSO
FSG
C
C Building Controller Connections - Heating
(Non-Power Contacts)
1. Operate on first stage heat only.
GREEN
GROUND
24V
TRANSFORMER
120V
2. Operate on second stage heat only.
GREEN
GROUND
24V
TRANSFORMER
GREEN
BROWN 120V
TO CONTROL
BUILDING CONTROLLER
(HEAT CONTACT)
FROM CONTROL
IND
L1
HSI
HSIG
L2
YELLOW
W
IGNITION CONTROL
PSI
FSI
BROWN
GV
PSO
LEAVE WIRE
FSG
NUT ON LEAD
C
BROWN
GREEN
HIGH LIMIT SWITCH
GAS CONTROL VALVE
GROUND
TO CONTROL
BUILDING CONTROLLER
FROM CONTROL (HEAT CONTACT)
RED
IND
L1
HSI
HSIG
L2
YELLOW
W
PSI
FSI
BROWN
GV
PSO
FSG
C
BROWN
HIGH LIMIT SWITCH
LO
RED
HI
C
IGNITION CONTROL
LO
RED
HI
C
GAS CONTROL VALVE