Hydronic Heating Boilers Owner's Manual

Catalog No.: 2000.203E Effective: 12-1-07 Replaces: 4-1-05
Job:
Engineer:
Contractor:
Prepared By: Date:
Model: Indoor
LOW NOx
 Less than 40 nanograms per joule
EFFICIENT
 82% efficiency – highest of any atmospheric boiler
available today
THERMAL SHOCK PROOF
 Twenty-year warranty against thermal shock damage
up to 150°F differential
 Maximum operating temperature: 230°F
LIGHTWEIGHT
 A floor load of 70 lbs./sq. ft. or less
HIGH RECOVERY
 Cuts fuel costs substantially because the standby and
radiation losses normal to other boilers and
tank-type water heaters are eliminated
LOW WATER OPERATING TEMPERATURE
 Operates with water temperature as low as
105°F without condensing
Heat Exchanger
 ASME Inspected and Stamped
160 PSIG
 National Board Approved
 Headers
Cast Iron Glass-lined – Standard
Bronze – Option A-1
 Finned Tubing
Copper – Standard
Cupro Nickel – Option A-3
 ASME Steel Tube Sheet
 Silicone O-Rings
 ASME Pressure Relief Valve
45 PSIG – Standard
PSIG ASME – Optional
 Temperature and Pressure Gauge,
Shipped Loose
 Water Connections
Left Hand – Standard
Right Hand – Option A-6
 Flow Configuration – Two-pass
 Pump – Optional
Mounted, 1/8 HP, 120 V, 1∅, 60 Hz
Controls
 120V, 60Hz, 1 Ph Power Supply
 120/24V Transformer
 100% Pilot Shut-off/Lockout
 Electronic, Intermittent Ignition (IID) Pilot
Controls (cont'd)
 High Limit Control, Manual Reset
 On/Off Switch
 Flow Switch
 Economaster II Pump Time Delay
Gas Train
 Natural Gas
 Manual Main Gas Shut-off Cock
 Main Gas Pressure Regulator
 Redundant Safety Shut-off Valve
 Control Valve
 Firing Mode
On/off (H4)
Two-stage firing (H3)
 Design Certified
ANSI Z21.13 H Stamp
Construction
 Front Controls
 Stainless Steel, Fan-Assisted
Burners
 Polytuf Powder Coat Finish
 Draft Diverter
 Base – Optional
Combustible Floor Shield –
Option J-1
Temperature Controls
B-6 2-stage Aquastat –
100-200ºF
B-26 2-stage Digital Controller
B-27 2-stage Digital Controller,
Outdoor Reset
Y-241 Electronic Sequencer,
1-4 Stages
Y-281 Electronic Sequencer,
1-8 Stages
Additional Safety Controls
F-10 Low Water Cut-off Probe
I-1 High Limit Control, Auto
Reset
S-1 Low Gas Pressure Switch
S-2 High Gas Pressure Switch
Regulatory Agency Requirements
Raytherm
®
- Type H
Hydronic Heating Boilers
Models 181-401 - Indoor
Low NOx