Submittal

Sizing Data
Input Output Thermal Gas Conn. Water Shipping
 Model   Efciency Size Conn.Size Weight
BTU/h kW BTU/h kW % inches inches lbs
kg
NTV 150 150,000 44.0 142,500 41.7 95 ½ NPT 1¼ NPT 228 103
NTV 199 199,000 58.3 193,030 56.5 97 ½ NPT 1¼ NPT 270 123
NTV 285 285,000 83.5 270,750 79.3 95 ¾ NPT 2 NPT 299 136
NTV 399 399,000 116.9 383,040 112.2 96 ¾ NPT 2 NPT 364 165
NTV 500 500,000 146.5 480,000 140.6 96 1 NPT 2 NPT 419 190
NTV 600 600,000 175.8 582,000 170.4 97 1 NPT 2 NPT 426 193
NTV 750 750,000 219.8 705,000 206.4 94 1½ NPT 2 NPT 481 218
NTV 850 850,000 249.1 816,000 238.9 96 1½ NPT 2 NPT 503 228
Clearances
Suggested Service
Appliance Access Clearance
Surface inches cm
Left Side 1 2.5
Right Side 12 31
To p 24 61
Back 6 15
Closet, Front 6 15
Alcove, Front 24 61
Vent – –
 CertiedbyCSAforzeroclearancetocombustiblematerialsonallsides.
Accessories
for Field
Mounting
Vent System
Intake (Air) Exhaust (Vent) Maximum Allowable
Size Pipe Pipe Equivalent Length*
150 3" 3" 100 ft 30 m
199 3" 3" 100 ft 30 m
285
3" 3" 20 ft 6.1 m
4" 4" 100 ft 30 m
399
4" 4" 100 ft 30 m
500
4" 4" 100 ft 30 m
600
4" 4" 40 ft 12 m
**6"** **6"** 100 ft 30 m
750
4" 4" 40 ft 12 m
6" 6" 100 ft 30 m
850
4" 4" 40 ft 12 m
6" 6" 100 ft 30 m
Installations in the U.S. require exhaust vent pipe that is a combination of PVC & CPVC complying with ANSI/ASTM D1785
F441, polypropylene pipe that complies with ULC S636, or stainless steel complying with UL1738. Installations in Canada
requireexhaustventpipethatiscertiedtoULCS636.
Intake (air) pipe may be ABS, PVC, CPVC or galvanized material.
Installer must comply fully with manufacturer's installation instructions, including use of minimum exhaust length CPVC, to
maintainANSIZ21.13safetycertication.
Closet and alcove installations do not allow the use of PVC under any circumstances
* To calculate max equivalent length, measure the linear feet of the pipe, and add 5 feet (1.5m) for each elbow used.
**
Allowed only if the vent pipe is no more than 20 equivalent feet longer than the air pipe.
** **
Waterowswitch(285only)
Low water cutoff
0 - 10V convertor for
modulation control
High & Low gas pressure
switches
Boiler pump (285-500)
Concentric vent terminal, 2"
Concentric vent terminal, 3"
Flush-mount terminal, 3"
Flush-mount terminal, 4"
Propane conversion kit
Condensate neutralizer kit
BACnet gateway
LON gateway
BNTV
BNTV
BNTV
BNTV
BNTV
BNTV
BNTV
BNTV