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AQUA PLUS indirect-fired water heaters — Product Manual
Contents
Please read before proceeding 3
When servicing water heater . . . . . . . . . . . . . . . . . . . . 3
Operating restrictions . . . . . . . . . . . . . . . . . . . . . . . . 3
Boiler water restrictions . . . . . . . . . . . . . . . . . . . . . . . 3
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pre-installation 4
Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Code restrictions. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Water heater placement . . . . . . . . . . . . . . . . . . . . . . . 4
Install levelling legs . . . . . . . . . . . . . . . . . . . . . . . . . 4
Domestic water piping requirements. . . . . . . . . . . . . . . . 5
Water heater operating restrictions. . . . . . . . . . . . . . . . . 5
Boiler water restrictions . . . . . . . . . . . . . . . . . . . . . . . 5
Hot Water Can Scald! . . . . . . . . . . . . . . . . . . . . . . . . 5
Domestic water piping 6
Piping overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Recirculation 8
Maintaining domestic water temperature in the supply piping . 8
Time delay at fixtures . . . . . . . . . . . . . . . . . . . . . . . . 8
Balancing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Components required . . . . . . . . . . . . . . . . . . . . . . . . 8
Connecting to the water heater . . . . . . . . . . . . . . . . . . . 8
Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Potential problems. . . . . . . . . . . . . . . . . . . . . . . . . 10
Boiler-side piping 11
Connecting to a low-pressure steam boiler 18
Filling the piping. . . . . . . . . . . . . . . . . . . . . . . . . . 19
Boiler-side wiring and controls 20
Wiring requirements. . . . . . . . . . . . . . . . . . . . . . . . 20
Circulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Zone Valves. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Wiring to the water heater. . . . . . . . . . . . . . . . . . . . . 20
Wiring options . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Use domestic priority . . . . . . . . . . . . . . . . . . . . . . . 20
Wiring — zoning with circulators 21
Wiring — zoning with zone valves 22
Water heater filling and start-up 23
Boiler water restrictions . . . . . . . . . . . . . . . . . . . . . . 23
Maximum boiler-side flow rate . . . . . . . . . . . . . . . . . . 23
Filling the domestic water tank . . . . . . . . . . . . . . . . . . 23
Start-up and operation . . . . . . . . . . . . . . . . . . . . . . 23
Start-up checklist . . . . . . . . . . . . . . . . . . . . . . . . . 23
Water heater temperature adjustment 24
Setting the thermostat . . . . . . . . . . . . . . . . . . . . . . . 24
Hot Water Can Scald! . . . . . . . . . . . . . . . . . . . . . . . 24
Water heater maintenance 25
ANNUAL start-up by qualified service technician . . . . . . . 25
Inspect anode and water heater interior . . . . . . . . . . . . . 26
Drain the water heater if necessary during shutdown periods . 26
Troubleshooting 27
Troubleshooting procedures . . . . . . . . . . . . . . . . . . . 27
Preparation for troubleshooting . . . . . . . . . . . . . . . . . 27
Replacement parts 39
AHRI ratings 40
Ratings with 200°F boiler supply water 41
Ratings with 190°F boiler supply water 42
Ratings with 180°F boiler supply water 43
Dimensions 44
Part number GL-E223-ADOC 0311
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