SECTION 3: C
LEARANCES
T
O
C
OMBUSTIBLES
7 of 73
NOTE:
1. All dimensions are from the surfaces of all tubes, couplings, tees, elbo
w
s and crosses.
2. Clearances B, C and D can be reduced by 50% after 7500 mm of tubing do
w
nstream
from the burner.
3. All measurements are in millimeters.
** When installed in the first 3 m.
FIGURE 7: LINEAR & DOUBLE LINEAR, 2 FOOT DECO GRILLE, PROTECTIVE GRILLE
Model
HE1
5
S
T
HE30DL
HE20S
T
HE40DL
HE25S
T
HE50DL
HE30S
T
HE60DL
HE35S
T
HE70DL
HE40S
T
HE45S
T
HE50S
T
A
150
150
150
150
150
150
200
200
B
890
970
970
1020
1170
1220
1280
1330
C
1570
1650
1650
1780
1930
1970
2010
2080
D
890
970
970
1020
1170
1220
1280
1330
A
C
D
B
FIGURE
8
: UNDERSHIELD**
Mode
l
HE
1
5
S
T
HE
30DL
HE
20S
T
HE
40DL
HE
25S
T
HE
50DL
HE
30S
T
HE
60DL
HE
35S
T
HE
70DL
HE
40S
T
HE
45S
T
HE
50S
T
A
150
150
150
150
150
150
-
-
B
990
1020
1270
1270
1370
1400
-
-
C
840
965
1120
1120
1220
1270
-
-
D
990
1020
1270
1270
1370
1400
-
-
A
C
D
B
FIGURE 9: LINEAR & DOUBLE LINEAR, VENTING
Mod
e
l
HE1
5
S
T
HE30DL
HE20S
T
HE40DL
HE25S
T
HE50DL
HE30S
T
HE60DL
HE35S
T
HE70DL
HE40S
T
HE45S
T
HE50S
T
E
1000
1000
1000
1000
1000
1000
1000
1000
F
500
500
500
500
500
500
500
500