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
| 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
