Specifications
IM 685-2 27
Table 7. Capacities and dimensions
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15)
Burner
Model
No.
Input MBH or CFH
Note 3
Furnace
Air Pressure (In. W.C.) Gas Pressure (in. W.C.)
Burner
Running
Current
Amps
Gas Connection Size (IP)
In Box
Measured: At Port 4
In Valve
At Port 5
Manifold
Measure at Tap (1)
Supply
Line
Measure @
Tap (2)
Note 1, 2
Inlet Pressure (PSI)
@ Max.
Rate
@ Min.
Rate
Note 4
Min.
CFM
Max.
TR
Deg F
During
Prepurge
@ Max. Rate
Burner
Operating
@ Max. Rate
During
Prepurge
@ Max. Rate
@ Max.
Rate
@ Min.
Rate
Note 5
To 0.5
2 — 3
Note 2
5 — 10
Note 2
HT 020 250 12.5 2,300 80 1.59 1.48 3.80 3.01 3.12 4.5 3.4 0.75 0.75 0.75
HT 025 312 15.6 3,800 61 1.95 1.95 3.71 3.46 3.55 5.5 3.5 0.75 0.75 0.75
HT 032 400 20.0 2,950 100 2.30 2.34 3.50 2.94 3.21 6.0 3.5 0.75 0.75 0.75
HT 040 500 25.0 6,000 61 2.69 2.74 3.29 4.14 4.39 5.0 3.6 1.00 1.00 1.00
HT 050 625 31.3 4,600 100 2.43 2.49 3.42 2.98 3.25 5.5 3.6 1.00 1.00 1.00
HT 064 800 40.0 9,600 61 2.04 2.15 3.50 2.86 3.22 7.0 3.8 1.25 1.25 1.25
HT 065 812 40.6 5,970 100 1.62 1.55 3.44 2.89 3.33 7.0 3.8 1.25 1.25 1.25
HT 079 1000 50.0 12,000 61 1.62 1.64 3.66 3.45 3.84 6.5 4.0 1.25 1.25 1.25
HT 080 1000 50.0 7,340 100 1.45 1.40 3.48 3.14 3.45 6.5 4.0 1.25 1.25 1.25
HT 100 1250 62.5 15,000 61 1.63 2.09 4.60 3.20 3.72 6.5 7.5 1.25 1.25 1.25
HT 110 1375 68.8 10,100 100 2.50 2.60 4.45 2.90 3.50 5.0 7.8 1.50 1.25 1.25
HT 140 1750 87.5 21,000 61 2.25 2.45 4.45 2.80 3.30 5.0 7.8 1.50 1.25 1.25
HT 150 1875 93.8 13,700 100 2.32 2.50 4.50 3.10 3.60 5.0 8.4 1.50 1.25 1.25
HT 200 2500 125.0 30,000 61 2.60 3.65 4.90 3.70 4.10 6.0 11.2 2.00 1.50 1.25
Notes:
1. Pressure to obtain 100% input with standard UL
gas train. For IRI, add 1.00 in. W.C.
2. Gas inlet pressures over 0.50 PSI (13.9 in. W.C.,8
oz./sq. in.) require an additional high pressure
regulator.
3. CFH of natural gas @ 1000 BTU/cu. ft.
4. At minimum firing rate the MBH should be 90 to
100% of this value.
5. This is approximate. A higher reading indicates
multiple valves are not in balance. See section on
“Gas Valve Pressure Regulator Adjustment.”
Key:
(1) Gas Manifold Pressure Tap (1/8 inch l.P.)
(2) Gas Line Pressure Tap (1/8 inch l.P.)
(3) Gas Pressure Regulator Adjustment
(4) Burner Box Air Pressure Port
(5) Air Valve Pressure Port (On Box Bottom)
(6) Firing Rate Indicator Scale
(7) Optional Additional Gas Valve(s)
(8) Optional High Pressure Regulator
(9) Optional Low Gas Pressure Switch
(10) Optional High Gas Pressure Switch
(11) Combination Gas Control
(12) Shoulder Screw Attaching Bushing To Crankarm
5
FSG
SUPER MOD
8
9
7
3
2
11
10
1
12
6
4
Figure 16b.
Figure16a.
Capacities and Adjustments