Catalog No.: 2000.303A
Effective: 11-15-07
Replaces: 8-15-07
Job:
Engineer:
Contractor:
Preparer:
Date:
Model:
Indoor/Outdoor:
MBTUH Input:
Fast, Economical Natural-to-Propane Gas Switchover
100% Factory Fire Tested
84% Efficiency
Maximum Outlet Temperature: 230°F
Minimum Non-Condensing Inlet Temperature: 105°F
Thermal Shock Proof Heat Exchanger
Limited Twenty-Year Thermal Shock Warranty
Diagnostic Center with Fault History
PolyTuf Powder Coated Cabinet
No Combustible Floor Shield Required
Fan-Assisted Low NOx Burners
Patented Burner Security Blanket
Heat Exchanger
H
Stamp
Headers
Glass-Lined Cast Iron – Standard
Bronze – Option A-1
ASME Inspected and Stamped
160 PSIG Working Pressure
National Board Approved
Fin
Tubing
Copper – Standard
Cupro Nickel – Option A-3
ASME Steel Tube Sheet
Silicone High Temp. O-Rings
ASME Pressure Relief Valve
45 PSIG – Standard on Models
302BD and 402BD
60 PSIG – Standard on Models
502BD-902BD
PSIG – Optional
Temperature and Pressure Gauge
Water
Connections
Left – Standard
Right – Option A-6
Controls
120V, 60Hz, 1
∅
Power Supply
120/24V 60Hz Transformer
100%
Shut-Off/Lockout
Hot Surface Ignition
Remote Flame Sensor
High Limit Control, Manual Reset
On/Off Power Switch
Manual
Shut-Off,
Front-Mounted
Flow
Switch
Blocked Vent Pressure Switch
Combustion Air Proving Switch
Economaster Pump Time Delay
Enable/Disable
Gas Train
Manual Gas Shut-Off Valve(s)
Gas
Pressure
Regulator
Safety Shut-Off Valve
Firing
Control
Valve
Firing
Mode
On/Off (H8): Models 302BD,
402BD
2-Stage (H9): Models
302BD-902BD
Natural/Propane
Gas
Design Certified ANSI Z21.13/
CSA 4.9
Gas
Connection
Left – Standard
Right – Option Z-1
Construction
Indoor/Outdoor
Construction
Enclosed Front Controls
Venting
Vent
Location
Top – Standard
Rear – Option D-14
Vent Termination Cap
Outdoor D-11
Indoor, Horizontal D-15
Indoor, Vertical (by others)
Combustion
Air
In-Line Filter Kit (TruSeal
only) D-17
Air Intake Elbow D-16
Extractor – Optional
By others
Not required
Burner
Ultra-Low NOx: Less than 30 PPM
Temperature Controls
B-2
Tankstat, Single-Stage
(100-200°F)
B-3
Tankstat, 2-Stage (100-200°F)
B-6
Aquastat, 2-Stage (100-200°F)
B- TempTracker
Digital
Controller,
2-Stage
B- TempTracker
Digital
Controller,
4-Stage
Y-241 Electronic Sequencer, 4-Stage
Y-281 Electronic Sequencer, 8-Stage
Options
C-6
Ignition Module, Manual Reset
D-21 TruSeal
®
Direct Vent
F-10 Low Water Cut-Off, Remote Probe
I-1
High Limit Control, Auto Reset
P- Pump: HP, 120V, 1
∅
, 60Hz
Water Hardness: GPG
Cast Iron
Bronze
Mounted
Loose
Front
Rear
P-26 Cold Water Start (See 2000.48)
S-1
Low Gas Pressure Switch, Manual
S-2
High Gas Pressure Switch, Manual
X-1
SureRack™ Kit
X-2
SureRack Add-on
Regulatory Agency Requirements
Hi Delta
®
FlexGas
®
-
Type H
Dual-Fuel Hot Water Boilers
Models 302BD-902BD
Patent Nos. 6,904,873 & 7,044,124;
other patents pending
