Nieco 850 Installation Manual

Job:

XFyre™ - Type WH

Engineer:

Contractor:

Prepared By: Date:

Model: Indoor/Outdoor:

95% Thermal Efficiency at Full Rate, Up to 99% at Part Load

Indoor/Outdoor Construction Standard

PVC, CPVC, or Stainless Venting Certified

Soft Start, Electronic Modulation, 5:1 Turndown

LCD Status Display and Full Diagnostics and Fault Memory

Footprint: Less Than 8-1/3 ft

Zero Clearance to Combustibles

Meets NOx Requirements Thru 2012 (< 20 ppm)

Maximum Outlet Water Temperature: 175°F

Maximum System Temperature: 175°F

Limited 25 Year Thermal Shock Warranty

Limited Five-Year Heat Exchanger Warranty

Heat Exchanger

 All Stainless Steel Construction with

Copper Connections

 Gasketless Heat Exchanger Design
 ASME H Stamped

160 PSIG Working Pressure

 National Board Approved
 ASME Pressure Relief Valve

125 PSIG – Standard
PSIG – Optional

 Temperature and Pressure Gauge,

Shipped Loose

Control

 120V, 60Hz, 1Ø, Power Supply
 Digital Operating Control with LCD

display.

 0-10 VDC input for BMS
 Cascade up to 8 water heaters
 Spark Ignition (DSI)
 Remote Flame Sensor
 High Limit, Manual Reset, Fixed,

175ºF

 Auto Limit, Fixed, 200ºF
 Alarm Dry Contact Connection
 On/Off Power Switch
 Flow Switch
 Blocked Vent Pressure Switch
 Boiler, DHW & System Pump

Contacts

 Water Temperature Sensors (3)

2

Burner

 Ultra-Low NOx: Less than 20 PPM

Gas Train

 Fuel

Natural Gas
Propane

 Zero Governor Regulator
 Dual-Seat Combination Valve
 Electronic Modulating Firing Mode

(WH7)

Construction

 Indoor/Outdoor Construction
 Front Controls Enclosed
 PolyTuf Powder Coat Finish
 Rear Connections (Electrical, Gas, Vent,

Combustion Air)

 Top Connections (Water)
 Design Certified ANSI Z21.10.3/

CSA 4.3

 Combustion Air Filter
 Condensate Trap

Venting (PVC-CPVC-Stainless)

 Vent Termination

Indoor, Vertical – Option D-11
Indoor, Horizontal – Option D-15
Outdoor

 Extractor - Optional

By others
Not required

Condensing Water Heaters

Models 300-850

Proudly Made in the USA

Multi-Boiler System Controllers

B-36 TempTracker Mod+ Hybrid Digital

Controller, 2-4 water heaters

B-37 TempTracker Mod+ Hybrid Digital

Controller, 5-10 water heaters

B-38 TempTracker Mod+ Hybrid Digital

Controller, 11-16 water heaters

Options

D-21 TruSeal™ Combustion Air Inlet

(Mounted)

D-22 TruSeal™ Combustion Air Inlet

(Loose)

P- Pump: HP, 120V, 1∅,

60Hz

Bronze/SS

S-1/S-2 High/Low Gas Pressure

Switches, Manual Reset

Z-12 Condensate Neutralizer Kit

Regulatory Agency Requirements

Catalog No.: 3500.17B Effective: 11-02-10 Replaces: 12-15-09

XFyre – Type WH

Models 300-850 Model

CLEARANCES

Front 24” 24”
Rear 24” 24”
Right 0” 0”
Left 0” 0”
Top 12” 24”
Floor 0” -­Vent 1” --

Certified

Minimum

Service

Minimum

Model

(WH7-)

MBTUH Dimensions (in.)

K

Ø

T

C/A

Ø

V

Input Output

A

Length

E

F

MountingG NPT H NPT

Flue

Ship

Weight

(Lbs.)

Foot-

Print

2

(Ft

Amps*

)

300 300 285 28-1/4 16-1/2 27-9/16 3/4 1-1/2 4 4 3 410 4.3 3
400 399 379 30-3/4 16-1/2 29-3/4 1 2 4 4 3 465 4.7 4
500 500 475 37-1/4 16-1/2 36-1/4 1 2 4 4 3 505 5.7 4
700 700 665 47-3/4 28 47-1/16 1-1/4 2 6 6 19-3/8 550 7.3 5
850 850 808 54-1/4 28 53-9/16 1-1/4 2 6 6 19-3/8 580 8.3 5

Ratings shown are for elevations up to 2,000 feet. For installations at elevations
above 2,000 feet, please consult the factory for additional instructions.

Catalog No.: 3500.17B Effective: 11-02-10 Replaces: 12-15-09

* Current draw is for heater only.

(Supply breaker must have delayed trip.)