LAARS Mighty Therm2 MT2P (Sizes 500–2000 MBTU/h) - Install and Operating Manual - Manual (Page 2)

LAARS Heating Systems Page 2
SECTION 1.
General Information
1.1 Introduction ...................................................... 3
1.2 Model Identification .......................................... 3
1.3 Warranty .......................................................... 4
1.4 Dimensions ...................................................... 4
1.5 Locating the Appliance..................................... 4
1.6 Locating Heater with Respect to Pool
System Loop .................................................... 4
1.7 Locating Appliance for Correct Horizontal
Vent/Ducted Air Distance from Outside Wall ... 4
SECTION 2.
Venting and Combustion Air
2.1 Combustion Air ................................................ 6
2.1.1 Combustion Air From Room ............................ 6
2.1.2 Intake Combustion Air...................................... 6
2.2
Venting ............................................................. 7
2.2.1 Vent Categories ............................................... 7
2.2.2 Category I Vent ................................................ 7
2.2.3 Common Venting Systems .............................. 7
2.2.4 Category III Vent .............................................. 9
2.3
Locating Vent & Combustion Air Terminals ...... 9
2.3.1 Side Wall Vent Terminal ................................... 9
2.3.2 Side Wall Combustion Air Terminal ................ 10
2.3.3 Vertical Vent Terminal .................................... 10
2.3.4 Vertical Combustion Air Terminal ................... 10
2.4
Vent Terminals for Outdoor Units ................... 10
SECTION 3.
Gas Supply and Piping
3.1 Gas Supply and Piping ...................................11
SECTION 4A.
Water Connections
4.1 Water Connections ........................................ 12
4.2 Automatic Chlorinators .................................. 12
4.3 Sensor Locations ........................................... 12
SECTION 5.
Electrical Connections
5.1 Main Power .................................................... 12
5.1.1 Changing Single Circuit to Two Circuits ......... 14
5.1.2 Field Wiring .................................................... 14
5.2
Temperature (Operating) Control .................. 14
5.3 Limit Controls ................................................. 14
SECTION 6.
Operating Instructions
6.1 Sequence of Operation .................................. 18
6.2 Filling the Heater System............................... 18
6.3 Operating the Burner and Set Up .................. 19
6.3.1 Set Up for 0 to 2500 Feet Altitude.................. 19
6.3.2 High Altitude Adjustment and Set Up ............. 19
6.4
Shutting Down the MT2P ............................... 20
6.5 Spring and Fall Operation
Stand-by Service ........................................... 20
6.6 Winter Operation............................................ 20
6.7 To Restart the MT2P ...................................... 20
6.8 Therapeutic Pools (Spas) .............................. 20
SECTION 7.
Maintenance
7.1 System Maintenance ..................................... 21
7.2 Appliance Maintenance and
Component Description ................................. 21
7.2.1 Burners .......................................................... 21
7.2.2 Filter ............................................................... 21
7.2.3 Gas Valves ..................................................... 21
7.2.4 Pool Loop High Limit Control ......................... 22
7.2.5 Automatic Reset High Limit Control ............... 22
7.2.6 Temperature Control ...................................... 22
7.2.7 Ignition Controls ............................................. 22
7.2.8 Ignitors ........................................................... 22
7.2.9 Ignition Sensors ............................................. 22
7.2.10 Transformer ................................................... 23
7.2.11 Blowers .......................................................... 23
7.2.12 Flow Switch .................................................... 23
7.2.13 Heat Exchanger Coil ...................................... 23
SECTION 8.
Trouble Shooting
8.1 Resolving Lockouts........................................ 24
8.2 Delayed Ignition – Possible Causes .............. 24
8.3 Short Cycling ................................................. 24
8.4 High Gas Consumption.................................. 24
8.5 Troubleshooting the Pool Heater
Temperature Control ...................................... 24
8.6 Troubleshooting MT2P Controls .................... 24
SECTION 9.
Replacement Parts
9.1 General Information ....................................... 25
9.2 Parts List ........................................................ 25
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