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1. Lightweight Refractory Panels
Multi-piece ceramic fiber panels enhance combus-
tion while minimizing heat retention.
2. Fully-enclosed Headers
Temperature sensors and lead wires/capillaries are
protected from weather, vandalism, and accidental
damage during installation and service.
3. Flue Connection
Top or back outlet flue connections offer greater
installation flexibility.
4. Air Filter
An easily-cleaned combustion air filter protects the
burners from airborne particles including flying
insects.
5. On-Board Diagnostic Center
Factory mounted standard equipment (302-2342).
Gives relevant service feedback as well as possible
solutions to clear the fault. All in plain English, no
cryptic codes to decipher. The control stores up to
16 fault codes in its history file for the service tech-
nician to review.
6. Status Display Lights
Up to 12 high-intensity LED lights, visible up-front,
indicate the operating status of the boiler.
7. Construction
The cabinet and all internal parts are made from
galvanized, aluminized or stainless steel. The exte-
rior is protected by textured powder-coat paint,
ideally designed for indoor or outdoor installations.
8. Central Point Wiring
Factory-made wire harnesses connect all electrical
components to an easy-to-troubleshoot circuit
board with multi-pin connectors.
9. Heat Exchanger Tubes
Time-proven copper finned tubes and optional
cupro-nickel tubes stand up to even the harshest
water conditions.
10. Burners
Special stainless steel alloy pre-mix burners pro-
vide clean, robust combustion and meet all low
NOx regulations.
11. HSI Access Panel
A small panel provides access to both the hot sur-
face igniter and the flame sensor to aid inspection
and service.
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On-Board Diagnostic Center
Raypak’s Hi Delta (302 thru 2342) comes equipped with a microprocessor-controlled diagnostic control center that displays its
information on a 2x20 character LCD display in plain English. This control monitors system safeties, ignition faults and system
status, while storing up to 16 reported faults. Raypaks diagnostic center also monitors the fault outputs of the Fenwal ignition
control. The Fenwal’s flash codes are converted into real English fault codes that anyone can understand. The control is also
equipped with a SPDT dry contact relay output that is switched anytime a safety fault occurs. This can be used for a heater alarm
or a BMS safety interface.
Diagnostic Information
Safety Faults Ignition Control Faults
• Condensate Drain • Low Air
• Manual High Limit • Flame- No CFH
• Auto High Limit • Ignition Lockout
• Low Water Cut-off • Low HSI Current
• Vent Pressure • Low 24VAC
• High Gas Pressure • Internal Control Fault
• Low Gas Pressure
• Controller Alarm
• Flow Switch
• Blower Switch
• Factory Option
• External Interlock
• Cold Water Run
Water Flow Sw Fault
Check Boiler Pump, Purge Air, Replace Flow Switch
Example Diagnostic Fault Report
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