EX 400 
EX 500
EX 700
EX 850
High Efficiency Commercial Fire Tube Boiler
The Superior heating solution, perfect for all large new and retrofit projects.
Features
Technical Data
Measurements
Documentation
Features
| Touchscreen Control |
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| Built-in Features |
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| Superior Heat Exchanger |
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| Easy to Install & Service |
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Technical Data
| SPECIFICATIONS | EX 400 | EX 500 | EX 700 | EX 850 |
| CSA Input (Natural Gas or Propane) – MBH | 40 – 399 | 50 – 500 | 70 – 700 | 85 – 850 |
| CSA Input (Natural Gas or Propane) – kW | 11.7 – 117 | 14.6 – 146.5 | 20.5 – 205 | 24.9 – 249 |
| CSA Output (Natural Gas or Propane) – MBH | 388 | 485 | 679 | 824.5 |
| CSA Output (Natural Gas or Propane) – kW | 114 | 142 | 199 | 241.6 |
| Thermal Efficiency | 97.90% | 97.50% | 97.00% | 97.00% |
| Min Gas Supply Pressure (Nat. Gas or Propane) – inch w.c. | 4 | 4 | 4 | 4 |
| Max Gas Supply Pressure (Nat. Gas or Propane) – inch w.c. | 14 | 14 | 14 | 14 |
| Ambient Temperature – Low (F/C) | 32° / 0° | 32° / 0° | 32° / 0° | 32° / 0° |
| Ambient Temperature – High (F/C) | 122° / 50° | 122° / 50° | 122° / 50° | 122° / 50° |
| Max relative humidity (non-condensing) | 90% | 90% | 90% | 90% |
| Min water Temperature (F/C) | 34° / 1° | 34° / 1° | 34° / 1° | 34° / 1° |
| Max water Temperature – (electronic high limit) (F/C) | 190° / 88° | 190° / 88° | 190° / 88° | 190° / 88° |
| Max. ∆T – supply/return (electronic fence) (F/C) | 80° / 44° | 80°/ 44° | 80°/ 44° | 80° / 44° |
| Max. Water Temperature Lockout Limit (F/C) | 201° / 94° | 201° / 94° | 201° / 94° | 201° / 94° |
| Power (120Vac/60Hz) @ full fire – watts (without pumps) | 150 | 210 | 195 | 228 |
| Weight (empty) – lbs/Kg | 414 / 188 | 441 / 200 | 486 / 202 | 510 / 231 |
| Heating Surface Area ft² / m² | 55.3 / 5.14 | 72.9 / 6.77 | 84.6 / 7.86 | 99.88 / 9.28 |
| Pressure Vessel water content – USG/Liters | 13.5 / 51 | 12.3 / 46.7 | 17.5 / 66.3 | 16.5 / 62.3 |
| Max boiler flow rate – USgpm | 100 | 100 | 100 | 100 |
| Min boiler flow rate – USgpm | 10 | 15 | 18 | 21 |
| Max Operating Water Pressure – psig * | 160 | 160 | 160 | 160 |
| Min Operating Water Pressure – psig | 8 | 8 | 8 | 8 |
| Relief valve pressure – psig | 50 | 50 | 50 | 50 |
| Approved installation altitude (Ft) | 12,000 | 12,000 | 12,000 | 12,000 |
| Max equivalent vent length (each side) | 170’ | 170’ | 120’ | 120’ |
Measurements
CONNECTIONS
| Connection | EX 400 / EX 500 | EX 700 / EX 850 |
| Flue Outlet | 4” Schedule 40 | 6” Schedule 40 |
| Combustion Air Inlet | 4” Schedule 40 | 4” Schedule 40 |
| Water Outlet | 2” NPT-M | 2 1/2” NPT-M |
| Water Inlet | 2” NPT-M | 2 1/2” NPT-M |
| Knock-outs (8) | 1/2” | 1/2” |
| Gas Inlet | 1” NPT-F | 1” NPT-F |
| Condensate Outlet | 3/4” Hose | 3/4” Hose |
CLEARANCE FROM THE CABINET
| Surface | Distance from combustible surfaces | Recommended distance for installation and service |
| Front | 2” | 30” |
| Rear flue connection | 2” | 24” |
| Left side | 1” | 2” |
| Right side | 1” | 4” |
| Top | 6” | 12” (required for filter replacement |
| Bottom | 0” | 0 |
VENTING
| VENTING | Maximum equivalent length | |
| Sched.40; Rigid PPs | EX 400 / EX 500 | EX 700 / EX 850 |
| 4” | 170’ (each side) | N/A |
| 6” | N/A | 120’ (each side) |
| 90° Vent Elbow | allow 5’ equivalent | allow 5’ equivalent |
| 45° Elbow | allow 3’ equivalent | allow 3’ equivalent |
| PPs 87-90° Elbows | use 5’ equivalent | use 5’ equivalent |
Documentation
