G
GA
AS
S
L
LI
IN
NE
E
A
AN
ND
D
E
EL
LE
EC
CT
TR
RI
IC
CA
AL
L
I
IN
NS
ST
TA
AL
LL
LA
AT
TI
IO
ON
N
21
Figure 20: Wiring Diagram for Standing Pilot - Millivolt System
Figure 21: Schematic Diagram for Millivolt System