4
Installation and operation manual
–
DTHC-V4-2020
Electrical supply: 120VAC / 1ph/60Hz
–
(from 4 to 15 Amp. Refer to name plate for specific value)
Notes:
1
.Intended for a temperature rise of 50°F to 120°F (28°C to 67°C)
-
1 MBTU: 1000 BTU/ Hr
-
CFM: Cubic foot per minute
-
Ratings are based on 1000 Btu/ft
3
for natural gas (2500 Btu/ft
3
for propane) at sea level. Reduce burner
capacity for altitude over 2000ft by 4% for each 1000ft above sea level.
Important
All gas piping must be performed by a qualified personel following the local codes and CSA B149.1
installation code for Canada or ANSI Z223.1/NFPA 54 for the United States.
*: With 10’’w.c. minimum inlet pressure.
**: With optional 2’’ NPT gas train for 7’’w.c. inlet pressure. The vent
must be piped to outdoor.
***: To be used in ventilated space only. In other case the regulator vent must be piped to outdoor.
Use ½’’ NPT tubing
.
Note:
•
This table should not be used to size the gas supply line.
•
If supply gas pressure exceeds 14 inches w.c., a high pressure regulator must be installed at gas piping
inlet. The regulator must be suitable for modulation ratio of 40:1 to properly regulate gas pressure at
low fire.
•
The regulator vent must be piped separately towards the outside of the building as stated by CSA B149.1
for Canada and ANSI Z223 for USA and local codes.
DTHC
Model
Input capacity
Output capacity
Turndown
ratio
Air flow
1
MBTU
kW
MBTU
kW
CFM
I/s
Min.
Max.
Min.
Max.
39
438
128
394
115
15:1
3038
7292
1434
3441
45
500
143
450
132
17:1
3472
8333
1639
3933
56
625
183
562
165
21:1
4340
10417
2048
4916
62
688
201
619
181
17:1
4774
11458
2253
5408
73
813
238
731
214
20:1
5642
13542
2663
6391
84
938
275
844
247
23:1
6510
15625
3072
7374
95
1063
311
956
280
27:1
7375
17700
3481
8353
112
1250
366
1125
329
31:1
8681
20833
4097
9832
140
1563
458
1406
412
26:1
10851
26042
5121
12290
169
1875
549
1687
494
31:1
13021
31250
6145
14748
Dim
Gas train connections (NPT)
Model
39
45
56
62
73
84
95
112
140
169*
169 **
Ø Gas
1
1
1
1
1
1
1-1/2 1-1/2
1-1/2
1-1/2
2
Ø Regulator Vent***
N/A: Vent limiter factory installed
***
1/2
Ø Vent valve
N/A: Valve proving system included with IRI gas train option.
Specifications
Gas supply