L.B. White Therma Grow Greenhouse HW220 Owner's Manual And Instructions page 13

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
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
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
24V
TRANSFORMER
120V
2. Operate on second stage heat only.
GREEN
24V
TRANSFORMER
GREEN
C
120V
BROWN
TO CONTROL
BUILDING CONTROLLER
(HEAT CONTACT)
FROM CONTROL
IND
GROUND
L1
HSI
HSIG
L2
YELLOW
W
PSI
FSI
BROWN
GV
PSO
FSG
C
BROWN
GREEN
HIGH LIMIT SWITCH
GROUND
TO CONTROL
FROM CONTROL
RED
IND
GROUND
L1
HSI
HSIG
L2
YELLOW
W
PSI
FSI
BROWN
GV
PSO
FSG
C
BROWN
HIGH LIMIT SWITCH
IGNITION CONTROL
LEAVE WIRE
NUT ON LEAD
LO
RED
HI
C
GAS CONTROL VALVE
BUILDING CONTROLLER
(HEAT CONTACT)
IGNITION CONTROL
LO
RED
HI
C
GAS CONTROL VALVE
12