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 -:>CHI6AAI=:E>E:86EDCI=:A:;I=6C9:C9D;I=:
B6>C<6HA>C:
 -:BDK:EA6HI>886E;GDBI=:G><=I=6C9H>9:E6C:A
6
C9G:>CHI6AA>CIDI=:HI6C96G9B6>C<6HDE:C>C<
AD86I:9DCI=:A:;I=6C9H>9:D;I=:=:6I:G
 -:BDK:I=: GJ77:G<GDBB:I;GDB I=:A:;I=6C9
H>9:E6C:A6C9G:>CHI6AA>CIDI=:HI6C96G9B6>C<6H
DE:C>C< AD86I:9 DC I=: G><=I=6C9 H>9: D; I=:
=:6I:G
 $CHI6AA68DJEA>C<C>EEA:JC>DC6C9H:9>B:CIIG6E
DCIDI=:G><=I=6C9:C9D;I=:B6>C<6HA>C:6C9
I=:C>CHI6AAI=:<6HA>C:B6@>C<HJG:I=6I6B6CJ
6AH=JID;;K6AK:=6H7::C>CHI6AA:9L>I=>C;ID;
I=:=:6I:G
 -:EA68: I=: A:;I 6C9 G><=I ;GDCI E6C:AH DC I=:
=:6I:G
Gas Supply Pressure
B>C>BJBD;>C26C96B6M>BJBD;>C
2JEHIG:6B<6HEG:HHJG:>HG:FJ>G:9JC9:GAD696C9
CDAD698DC9>I>DCH;DGC6IJG6A<6HB>C>BJBD;
>C26C96B6M>BJBD;>C2>HG:FJ>G:9;DG
EGDE6C:<6H/=:<6HEG:HHJG:G:<JA6IDGHHJEEA>:9
DCI=:=:6I:G>H;DGADLEG:HHJG:H:GK>8:$;JEHIG:6B
EG:HHJG: :M8::9H  >C 2 6C >CI:GB:9>6I: <6H
EG:HHJG: G:<JA6IDG D; I=: AD8@JE INE: BJHI 7:
>CHI6AA:9
2=:C8DCC:8I>C<699>I>DC6A<6HJI>A>O6I>DC:FJ>EB:CI
IDI=:<6HE>E>C<HNHI:BI=::M>HI>C<E>E>C<BJHI7:
8=:8@:9ID9:I:GB>C: >;>I =6H69:FJ6I: 86E68>IN;DG
I=:8DB7>C:9AD69
/=:<6HK6AK:EG:HHJG:G:<JA6IDGHDCI=:=:6I:G6G:
CDB>C6AAN EG:H:I 6I  >C 2 ;DG C6IJG6A <6H 6C9
>C2;DGEGDE6C:<6H/=:EG:HHJG:6II=:<6H
K6AK:DJIA:II6EB:6HJG:9L>I=6B6CDB:I:GL=>A:>C
Fig. 17: Gas Valve
DE:G6I>DCH=DJA97:R>C2;DGC6IJG6A<6H
6C9>CR>C2;DGEGDE6C:<6H$;6C69?JHI
B
:CI>HC::9:9G:BDK:I=:69?JHIB:CIH8G:L8DK:G
6C9IJGCI=:69?JHIB:CIH8G:L8AD8@L>H:ID>C8G:6H:
E
G:HHJG:DG8DJCI:G8AD8@L>H:IDADL:GEG:HHJG:
Electrical Power Connections
$CHI6AA6I>DCHBJHI;DAADLI=:H:8D9:H
Q )6I>DC6A A:8IG>86AD9: 6C9 6CN DI=:G C6I>DC6A
HI6I:EGDK>C8>6ADGAD86A8D9:HDGG:<JA6I>DCH=6K
>C<?JG>H9>8I>DC
Q .6;:INL>G>C<BJHI7:) A6HH
Q #:6I:GBJHI7::A:8IG>86AAN<GDJC9:96HG:FJ>G:9
7NI=:) 
Q $C6C696. +6GI
/=:=:6I:G>HL>G:9;DG16BEH>C>IH76H>8
8DC;><JG6I>DC 99>I>DC6A DEI>DCH B6N >C8G:6H: I=:
6BE9G6LD;I=:JC>I/=:KDAI6<:>H>C9>86I:9DCI=:
I>:>CA:69HDCHJAII=:L>G>C<9>6<G6BH=>EE:9L>I=
I=:=:6I:G>CI=:>CHIGJ8I>DCE68@:I/=:G:BDI:I6C@
8DCIGDAHI6II=:GBDHI6IDG:A:8IGDC>8=:6I:G8DCIGDA6H
6EEA>867A: B6N 7: 8DCC:8I:9 ID I=: HI6<: H:A:8IDG
I:GB>C6A.::L>G>C<9>6<G6B1>HHJEEA>:9ID
I=>H 8DCC:8I>DC I=GDJ<= I=: =:6I:G IG6CH;DGB:G DO
NOT attach any voltage to the stage selector termi-
nals. :;DG: HI6GI>C< I=: =:6I:G 8=:8@ ID :CHJG:
EGDE:GKDAI6<:IDI=:=:6I:G6C9EJBE
$CHI6AA 6 H:E6G6I: 9>H8DCC:8I B:6CH ;DG :68= AD69
0H:6EEGDEG>6I:ANH>O:9L>G:6H9:;>C:97N) .
6C9DGAD86A8D9:AAEG>B6GNL>G>C<H=DJA97:6IA:6HI
D;B>C>BJBG6I>C<
$;6CND;I=:DG><>C6AL>G:6HHJEEA>:9L>I=I=:=:6I:G
BJHI7:G:EA68:9>IBJHI7:G:EA68:9L>I=PL>G:
DG>IH:FJ>K6A:CI
Field-Connected Controllers
$I >H HIGDC<AN G:8DBB:C9:9 I=6I 6AA >C9>K>9J6AANEDL
:G:9 8DCIGDA BD9JA:H 6C9 I=: =:6I:G H=DJA9 7:
HJEEA>:9;GDBI=:H6B:EDL:GHDJG8:
NOTE: !>:A9HJEEA>:9 >HDA6I>DC G:A6NH H=DJA9 7:
>CHI6AA:9 L=:C ;>:A98DCC:8I:9 8DCIGDAA:GH 6G:
BDJCI:9BDG:I=6C:FJ>K6A:CI;::I"6;GDB
=:6I:G
CAUTION: !DGEGDE:G DE:G6I>DCCD BDG: I=6C 6
9GDE>C<6HHJEEANEG:HHJG:;GDBCDAD69ID;JAA
AD69 8DC9>I>DCH >H 688:EI67A: 0C9:G CD
8>G8JBHI6C8:H H=DJA9 I=: EG:HHJG: 7: DJIH>9: I=:
A>HI:9DE:G6I>DC6AG6C<: