Contents
SECTION 1. GENERAL INFORMATION Page
1A. Introduction ......................................................3
1B. Heater Identification ......................................... 3
1C. Flow Requirements .......................................... 4
1D. Water Chemistry .............................................. 4
SECTION 2. INSTALLATION
2A. Heater Placement ............................................ 4
2B. Installation of Indoor Heaters ........................... 5
2B-1 Combustion Air Supply ......................... 5
2B-2 Venting ................................................. 6
2C. Installation of Outdoor Heaters......................... 7
2D. Gas Supply and Piping..................................... 7
2E. Electrical Wiring ............................................... 8
2F. Water Piping of System.................................... 9
2G. Water Expansion.............................................. 9
2H. Pump Performance and Installation ............... 10
2I. Water Pressure .............................................. 14
2J. Tank Installation .............................................14
2K. Two-Temperature System ............................. 17
SECTION 3. OPERATION
3A. Controls – General ......................................... 17
3B. Initial Start-up................................................. 19
3C. To Start Up System........................................ 19
3D. To Turn Off Heater......................................... 20
3E. To Shut Down System ................................... 20
SECTION 4. MAINTENANCE . ............................. 20
SECTION 5. TROUBLESHOOTING AND
ANALYSIS OF SERVICE PROBLEMS ................. 21
TABLES AND FIGURES
Table I. Boiler Configuration ................................. 4
Table II. Minimum Recommended Air Supply
To Heater ................................................ 6
Table III. Gas Piping Sizes ..................................... 8
Table IV. Pump Performance Requirements ........ 14
Table V. Modu-snap Valve
Temperature Settings ............................ 18
Figure 1 Boiler Configuration ............................... 3
Figure 2 Typical Heater Installation with Base
for Combustible Floors (Ex. A) .............. 5
Figure 3 Typical Heater Installation with Base
for Combustible Floors (Ex. B) .............. 5
Figure 4 Typical Heater Installation with Base
for Combustible Floors (Ex. C) .............. 5
Figure 5 Installation on Concrete Blocks
or Tile .................................................... 5
Figure 6 Alcove Installation ................................. 6
Figure 7 Incorrect Outdoor Installation ................ 7
Figure 8 T-Fitting Sediment Trap Installation ....... 8
Figure 9 Pressure Relief Valve Location ............. 9
Figure 10 Tempering Valve Installation ................. 9
Figure 11 Hot Water Supply System for
Models VW and PW ............................ 11
Figure 12 Hot Water Supply System using
Model PW with Dual Tanks,
Building Loop Return and
Circulating Pump ................................. 12
Figure 13 Split System Piping for Model IW ........ 12
Figure 14 Dual Installation Piping Diagram
for Model IW ........................................ 13
Figure 15 Single Installation Piping
Diagram for Model IW ......................... 13
Figure 16 Two Temperature Hot Water
Supply System (Model VW or
PW) Vertical/Horizontal Tank .............. 15
Figure 17 Two Temperature Hot Water
Supply System w/Vertical
Tank for Models VW and PW
Water Heaters ..................................... 16
Figure 18 Controls Location ................................ 16
Figure 19 Control Components ........................... 18
Figure 20 Pilot Burners (I.I.D.)............................. 18
Figure 21 Gas Manual Valves ............................. 19
Figure 22 Pilot Safety Relay ................................ 20
Figure 23 Main Burner Flame Pattern ................. 20
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