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

Express setup – program your boiler in seconds with remote monitoring & diagnostics

Precise burner modulation control

Easy USB programmability

Intuitive alert system with detailed error message

Vast array of performance data for troubleshooting

Load combining and zoning

Multi-boiler communication for network applications up to 24 boilers without additional controls

With 24 networked boilers turndown ratio is 240:1

End switch, 0-10 VCD or 4-20mA control compatible

Full BACnet capability included

Primary pump and zone pump controller – up to 4 zones

Built-in Features

Unparalleled build quality

Turndown ratio of 10:1 means you have the power to heat the building in the coldest weather, yet reduce short cycling when the weather is mild

MFZ Moisture management protocol

Reverse flow detection

Outdoor reset control of water temperature

CSA/UL approved low water cut-off and manual reset high limit

CSD-1 Compliant

Unmatched safety features

Superior Heat Exchanger

The most advanced stainless steel fire tube boiler on the market today

High grade 439 stainless steel construction

Innovative saddle-bolt lit hardware

Better thermal efficiency – up to 97%

Condensed flue gasses clean vertical flue tubes while draining

Custom water flow baffling to ensure even heat transfer and long life

Easy to Install & Service

PVC/CPVC/PP/SS venting materials approved

Direct vent lengths – up to 170’ each side

Available in either NG or LP factory set or field convertible

Open access to heat exchanger and all internal components

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