AERCO ECS Retrofit - Manual (Page 48)

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4.5.1 Helitherm Steam-to-Water Units
For Helitherm Steam-to-Water units, refer to Figure 4-11 which shows a typical B-Plus Heater.
Proceed as follows:
1. Remove the Compound Pressure Gauge (8356-[ ]), Pig Tail (8-20) and 1/4” Coupling (9-3)
from the Retrofit Kit.
2. Install the Pig Tail in the tapped hole downstream of the CXT-E Control Valve.
3. Attach the 1/4” NPT Coupling and Pressure Gauge to the Pig Tail as shown in Figure 4-11.
Tighten all connections.
4.5.2 Double Wall Steam-to-Water Units
For Double-Wall Steam-to-Water units, refer to Figure 4-12. This Figure shows typical Compound
Pressure Gauge installation locations for DW-24 and DW-68 units.
1. Remove the Compound Pressure Gauge (8356-[ ]), Pig Tail (8-20), 1/4” NPT x 4” long Nipple
(91024) and two 1/4” NPT Couplings (9-3) from the Retrofit Kit.
2. For a DW-24 unit, install the 4” long NPT Nipple to the existing elbow on the Steam Inlet. For
DW-68 or DW-45 units, install the 4” long NPT Nipple to the Steam Inlet Flange.
3. Next install one of the 1/4” Couplings to the end of the 4” long Nipple.
4. Attach the Pig Tail, 1/4” Coupling and Compound Pressure Gauge as shown in Figure 4-12.
Tighten all connections