Raypak Raytherm - Type WH 926-1758 User Manual

Catalog No.: 2000.22N Effective: 12-1-07 Replaces: 10-15-03
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EFFICIENT
 82% thermal 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 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
Glass-lined Cast Iron – Standard
Bronze – Option A-1
 Finned Tubing
Copper – Standard
Cupro Nickel – Option A-3
 ASME Steel Tube Sheet
 Silicone O-Rings
 60 PSIG ASME Pressure Relief Valve
 Temperature and Pressure Gauge
(Boiler)
 Water Connections
Left Hand – Standard
Right Hand – Option A-6
 Flow Configuration
Two-pass – Standard
Single-pass (Cast Iron Only)
 Pump, Rear-mounted (Optional)
4.25” Impeller
4.7” Impeller
Controls
 120V, 60Hz, 1 Ph Power Supply
 120/24V Transformer
 100% Pilot Shut-off/Lockout
 Electronic, Intermittent Ignition (IID)
Pilot
 High Limit Control, Manual Reset
Controls (cont.)
 On/Off Switch
 Flow Switch
 Economaster II Pump Time Delay
Gas Control Train
 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)
Four-stage Firing (H9)
Mechanical Modulation,
110-170°F (H5)
Mechanical Modulation,
150-210°F (H1)
Motorized Modulation (H2)
B-6000 (H6)
 Fuel
Natural Gas
Propane Gas
 Design Certified ANSI Z21.13/CSA 4.9
Construction
 Front Controls
 Stainless Steel Burners
 Polytuf Powder Coat Finish
 Stackless Top
 Base (Optional)
Combustible Floor Shield – Option J-1
Temperature Controllers
Note: H1 and H5 do not require a controller
B-7 Modulating
B-5 Modulating, Outdoor Reset
B-6 Two-stage
B- Four-stage Digital
Y-241 Electronic Sequencer,
1-4 Stages
Y-281 Electronic Sequencer,
1-8 Stages
Additional Safety Controls
F-9 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
Commercial
Models 926-1758 (Outdoor)
Fig. #8953

Raypak Raytherm - Type WH 926-1758 Specifications

General

Category	Water Heater
Model Number	WH 926-1758
Brand	Raypak
Series	Raytherm
Fuel Type	Natural Gas
Thermal Efficiency	82%
First Hour Rating	Not available
Minimum Water Pressure	30 PSI
Maximum Water Pressure	160 PSI
Model	Raytherm
Type	WH

Summary

Product Features

Efficient Operation

Features 82% thermal efficiency, the highest for atmospheric boilers.

Thermal Shock Proof

Twenty-year warranty against thermal shock damage up to 150°F differential.

Lightweight Design

Offers a floor load of 70 lbs./sq. ft. or less.

High Recovery

Cuts fuel costs by eliminating standby and radiation losses.

Low Water Operation

Operates with water as low as 105°F without condensing.

Component Specifications

Heat Exchanger Details

Details ASME construction, materials like cast iron or bronze, and fittings.

Control System Components

Includes power supply, transformer, pilot shut-off, and ignition system.

Gas Control Train

Specifies manual shut-off, pressure regulator, control valve, and firing modes.

Temperature Controllers

Lists available controllers like modulating and digital options.

Additional Safety Controls

Includes low water cut-off, high limit controls, and pressure switches.

Regulatory Agency Requirements

Lists design certifications and compliance standards.

Model Dimensions and Performance

Model Specifications

Details model numbers, MBTU input/output, dimensions, and connections.

Boiler Flow and Pressure Drop

Provides GPM and pressure drop data for two-pass and single-pass systems.