Operating instructions

4 Main Dimensions
GT 300 A/II
A Water flow tapping 2 1/2" NPSC
B Water return 2 1/2" NPSC
C Drain 1 1/2" FPT
D Rp 2 1/2 diameter sludge removal hole
Notes:
- Dimension are for gas burner only
- Oil and combination oil/gas, refer to burner manufacturer
specifications
A
C
B
D
A
Type of boiler GT 304 A/II GT 305 A/II GT 306 A/II GT 307 A/II GT 308 A/II GT 309 A/II
L
38
5/8"
44
59/64"
51
7/32
57
33/64"
63
13/16"
70
7/64"
P
19
9/32
25
19/32"
31
7/8
38
3/16"
44
31/64"
50
25/32"
Ø R
7" 7" 7" 8" 8" 8"
G50_0001
X
Dimension "X" Max. Burner Length (inches)
Boiler Model Riello Weishaupt Power Flame Fuel Master Gordon Piatt
GT304 A/II
10
19
22
1/4
19
1/4
26
GT305 A/II
GT306 A/II
26
15/32
GT307 A/II
GT308 A/II
23
25
1/8
GT309 A/II
6
GT 300 A/II 06/10/06 - 94863873 - 85534150E