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FIGURE 5.6: BASIC DOMESTIC WATER PIPING
WARNING
If IWH is replacing a tankless coil, drain tankless coil and leave open to atmosphere. Do not plug coil.
Model
Max Boiler Water Limit Setting
220°F or Less 221° - 250°F
MS2-030 100,000 112,300
MS2-040 100,000 133,700
MS2-050 100,000 156,300
MS2-075 115,000 195,600
MS2-119 199,900 Note 1
1. Not permitted unless the combined output of all boilers
connected to this indirect water heater is less than 200,000
BTU/hr. If this condition is met, install a T&P valve having a
capacity of 200,000 BTU/hr.
2. Maximum T&P Valve Pressure Setting - 150 psi
3. Maximum T&P Valve Pressure Setting - 210°F
TABLE 5.7: MINIMUM T&P VALVE CAPACITY REQUIREMENTS (BTU/hr)
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