5
Installation and operation manual
–
DTHR-V9-2020
*: The pressure adjustment may vary slightly. See the unit name plate for the exact value.
**
: With optional 2’’ NPT gas train.
***: With standard 1-1/2
’’ NPT gas train.
****: At maximum capacity (while burner is operating).
DTHR
Model
Natural Gas
Dynamic supply
pressure****
Nominal Manifold
pressure*
Pilot
pressure
Low fire inlet
capacity
Minimum
In.w.c [kPa]
Maximum
In.w.c [kPa]
At maximum capacity
In.w.c [kPa]
In.w.c [kPa]
MBH
Kw
35
7”
[1.74]
10”
[2.5]
2.3
” [0.
57]
3.5
” [0.
87]
30
8.79
40
2.9
” [0.
72]
50
4.6
” [
1.15]
55
3.1
” [0.
77]
40
11.7
65
2.8
” [0.
69]
75
2.3
” [0.5
7]
85
2.9
” [0.
72]
100
3.8
” [0.
95]
125
2.6
” [0.
65]
60
17.6
150**
3.9
” [0.9
7]
150***
10”
[2.5]
14”[3.5
]
4.0” [0.
99]
DTHR
Model
Propane Gas (LP)
Dynamic supply
pressure****
Nominal Manifold
pressure*
Pilot
pressure
Low fire inlet
capacity
Minimum
In.w.c [kPa]
Maximum
In.w.c [kPa]
At max. capacity
In.w.c [kPa]
In.w.c [kPa]
MBH
Kw
35
11
”
[2.74]
14
”
[3.5]
(Consult factory
or rating plate)
2.5
” [0.
62]
30
8.79
40
50
55
40
11.7
65
75
85
100
125
60
17.6
150
Gas pressure adjustments
