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CONTENTS
3
4 PART ONE
OWNER'S OPERATING INSTRUCTIONS
4 SECTION 1
START-UP PROCEDURES
4 Before Start-Up
5 Lighting Instructions & Shut-Off Procedures-
Manually Lighted Pilots MV
6 Operating Instruction & Shut-Off Procedures-
Automatically Lighted Pilots IID
7 After Start-Up
7 SECTION 2
CAUTION
7 SECTION 3
MAINTENANCE & CARE PROCEDURES
8 Pool & Spa Water Chemistry
8 Cold Weather Operation
9 Winterizing the Pool & Spa Heater
10 PART TWO
INSTALLATION & SERVICE INSTRUCTIONS
10 SECTION 1
RECEIVING EQUIPMENT
10 SECTION 2
GENERAL SPECIFICATIONS
11 SECTION 3
INSTALLATION INSTRUCTIONS
11 Code Requirements
11 Clearances
12 Outdoor Heater Installation
12 Indoor Heater Installation
16 Specifications and Dimensions
16 Combustion Air
17 Vent Piping
17 Gas Supply Connections
19 Plumbing For Water Connections
23 Heat Exchanger Reversal Procedure
24 Electrical Wiring
25 Transformer Wiring
26 Wiring Diagram-Millivolt (Mechanical Therm.)
27 Wiring Diagram-IID (Atmospheric)
28 Wiring Diagram-IID (Low NOx)
29 SECTION 4
SERVICING INSTRUCTIONS
29 General Location of Controls
29 Millivolt Controls
30 Digital Thermostat Controls
31 Digital Diagnostics and Codes
32 Remote Control and Operation Installation
34 Pressure Switch
34 Flame Roll-Out Safety Switch
34 High Limit
34 Pilot Safety
35 Burner Drawer Removal
35 Gas Valve Removal
35 Main Burner and Orifice Removal
35 Pilot Removal and Cleaning
35 Heat Exchanger Removal
36 Tube Cleaning Procedure
36 Desooting Procedure
36 Combustion Chamber Removal
36 Immersion Well Replacement
36 Unitherm Governor (U.G.) Replacement
37 Low NOx Pool Heaters
39 SECTION 5
TROUBLE SHOOTING GUIDE
39 Mechanical
40 Electrical MV Units
41 Electrical IID Units
42 Digital Control Logic
43 SECTION 6
REPLACEMENT PARTS
44 Illustrated Parts List
46 Part Numbers