Raypak Raytherm - Type WH 926-1758 - 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
ƒ ASME Inspected and Stamped
160 PSIG
ƒ National Board Approved
ƒ Headers
Glass-lined Cast Iron – Standard
Bronze – Option A-1
ƒ Finned Tubing
Copper – Standard
Cupro Nickel – Option A-3
ƒ ASME Steel Tube Sheet
ƒ Silicone
O-Rings
ƒ 60 PSIG ASME Pressure Relief Valve
ƒ Temperature and Pressure Gauge
(Boiler)
ƒ Water Connections
Left Hand – Standard
Right Hand – Option A-6
ƒ Flow Configuration
Two-pass – Standard
Single-pass (Cast Iron Only)
ƒ Pump, Rear-mounted (Optional)
4.25” Impeller
4.7” Impeller
Controls
ƒ 120V, 60Hz, 1 Ph Power Supply
ƒ 120/24V
Transformer
ƒ 100% Pilot Shut-off/Lockout
ƒ Electronic, Intermittent Ignition (IID)
Pilot
ƒ High Limit Control, Manual Reset
Controls (cont.)
ƒ On/Off
Switch
ƒ Flow Switch
ƒ Economaster II Pump Time Delay
Gas Control Train
ƒ Manual Main Gas Shut-off Cock
ƒ Main Gas Pressure Regulator
ƒ Redundant Safety Shut-off Valve
ƒ Control Valve
ƒ 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)
ƒ Fuel
Natural Gas
Propane Gas
ƒ Design Certified ANSI Z21.13/CSA 4.9
Construction
ƒ Front
Controls
ƒ Stainless Steel Burners
ƒ Polytuf Powder Coat Finish
ƒ Stackless
Top
ƒ 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