1
MB Pool & spa heater
INSIDE COVER -
GENERAL & PERFORMANCE SPECIFICATIONS
2
PART ONE - USER'S OPERATING INSTRUCTIONS
2
Start-up procedures
2
Safety before start-up
3
Operating models 055, 105 and 155
4
Operating models 185, 265 and 405
5
Caution notice
5
Maintenance and care procedure
6
Pool & spa water chemistry
6
Cold weather operation
6
Winterizing the pool & spa heater
PART TWO - INSTALLATION/SERVICE INSTRUCTIONS
7
General
notices
INSTALLATION INSTRUCTIONS
7
Installation of the pool & spa heater
11 Outdoor
heaters
11 Indoor
heaters
14 Combustion
air
15
Gas supply connections
16
Plumbing for water connections
16
Left side water connection conversion
19 Electrical
wiring
SERVICING
INSTRUCTIONS
22
General location of controls
24 Temperature
controls
25 Pressure
switch
26 High
limit
26 Pilot
safety
26
Burner drawer removal
26
Gas valve removal
26
Main burner & orifi ce removal
26
Pilot removal & cleaning
27
Heat exchanger removal
27
Control immersion well replacement
27 Tube
cleaning
28 Desooting
procedure
28
Combustion chamber removal
28
Unitherm governor replacement
TROUBLE SHOOTING GUIDE
29
Mechanical - All models
32
Electrical models 055, 105 & 155.
34
Electrical models 185, 265 & 405.
REPLACEMENT
PARTS
36
Replacement parts list - 055
38
Replacement parts list - 105
40
Replacement parts list - 155
42
Replacement parts list - 185, 265 & 405
Contents