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503-2003 manual WIRING DIAGRAMS - Models
Models:
503-2003
1
39
56
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Troubleshooting
Install
WIRING DIAGRAMS - Models
Filter Replacement
Warranty
Maintenance
Exhaust Configuration
Field Wiring Connection
Mode 5 - Outdoor reset using primary/secondary pip- ing. The heater is operated as in Mode 2. However, the target temperature is based on outdoor reset. See Fig
UDB Diagnostic Board
Page 39
Image 39
WI
R
I
N
G DIAGRAMS -
Models
503–1503
39
Page 38
Page 40
Page 39
Image 39
Page 38
Page 40
Contents
Models 503-2003 Types H & WH
INSTALLATION & OPERATING INSTRUCTIONS
Rev. 8 reflects the following
CONTENTS
Pay Attention to These Terms
WARNINGS
Model Identification
BEFORE INSTALLATION
Installations at Elevation
Product Receipt
Fig. 2 Component Locations - Front
Component Locations
General Information
Fig. 1 Component Locations - Side
Time to Produce Serious
GENERAL SAFETY
Time/Temperature Relationships in Scalds
Water
Clearances
INSTALLATION
Installation Codes
Equipment Base
Min. Clearance
Combustion and Ventilation Air
Service
Heater
U.S. Installations1
Canadian Installations2
Table E Vent/Air Inlet Termination Clearances
Direct Vent
Conventional Combustion Air Supply
U.S. Installations
Air Filter
Water Piping
Canadian Installations
General
Cold Water Operation
Temperature & Pressure Gauge
Relief Valve Piping
Hydrostatic Test
Cold Water Starts
Hydronic Heating
Pump Selection
Feedwater Regulator
P ft
Model
Min. Flow
Max. Flow
Pool Heating
Three-WayValves
Domestic Hot Water
Potable Water and Space Heating
1.Turn on pump
Fiberglass Spas
Winterizing Your Heater
Recommended Levels
Fiberglass Pools
Automatic Chlorinators and Chemical Feeders
Gas Supply
Gas Supply Connection
Gas Supply Pressure
Natural Gas
Electrical Power Connections
Check the Power Source
Field-ConnectedControllers
Making the Electrical Connections
Appliance Categories
Field Wiring Connection
Venting
DANGER SHOCK HAZARD
Heater Venting Category
Exhaust Configuration
U.S. Installations
Combustion Air Supply
Installation
Venting Installation Tips
Venting Configurations
Canadian Installations
Termination
Model
Volume of
Common Venting
Vent
75’ of straight flue pipe
Installation
Combustion Air
Installation
Model
Certified
Termination
Outdoor Installation
Controls
Freeze Protection
Operating Modes
Mode 5 - Outdoor reset using primary/secondary pip- ing. The heater is operated as in Mode 2. However, the target temperature is based on outdoor reset. See Fig
Mode 8 - This mode is for remote firing control of the heater via an external sequencer such as the Raypak TempTracker MOD+. The Boil Max setting is the heater shutdown temperature max temperature. The heater is enabled via dry contact at the Enable/Disable connection at the low voltage terminal strip, and the fir- ing rate is controlled by a 0-10VDC signal from the external sequencer. A control signal of ≥0.5 VDC equates to minimum fire, and a signal of 10 VDC equates to 100% firing rate. See Fig
2-10VDC
Default Setting
0-10VDC
0-20mA
Definitions
Type
Fault Description
Rank
Number Field
Code
Heater Sequence of Operation
High Limit-ManualReset
Ignition Module
High & Low Gas Pressure Switches Optional
High Limit-AutoReset Optional
Modulating Temperature Control
Flow Switch
Air Pressure Switch
Blocked Vent Switch
UDB Diagnostic Board
WIRING DIAGRAMS - Models
Models
Initial Start-up
START-UP
Pre Start-up
Pre Start-upCheck
Attach Manometers to Measure Pressures
Preparation
Start-Up
Check Power Supply
Manifold Gas Pressure Setting
Setting
Setting in. WC
Setting
Follow-Up
Leak Test Procedure Dual-SeatGas Valve
Lighting Instructions
OPERATION
To Turn Off Gas To Appliance
Step Step
TROUBLESHOOTING
Step Step Step
Step
MAINTENANCE
UDB Fault History
Suggested Minimum Maintenance Schedule
Weekly
Preventive Maintenance Schedule
Periodically
Daily
Filter Maintenance
Filter Replacement
As Required
Inside Air Contamination
APPENDIX
248 CMR 5.082a1 through
PARTS REPLACEMENT
LIMITED PARTS WARRANTY MVB - TYPES H AND WH
HEAT EXCHANGER WARRANTY
ADDITIONAL WARRANTY EXCLUSIONS
Nominal Factory Recommended Settings
START-UPCHECKLIST FOR FAN-ASSISTED
RAYPAK PRODUCTS
EMISSIONS SETTINGS AND TEST INFORMATION