AERCO ECS Retrofit - Manual (Page 46)

46
NOTE
Paragraph 4.5 applies ONLY to Steam-to-Water Heater Models which include
A-Plus, B-Plus, B-Plus II Helitherm Models and Steam-to-Water Double-Wall
Models. Disregard the procedures in paragraph 4.5 for ALL Water-to-Water
Heater Models and proceed directly to paragraph 4.6.
4.5 Compound Pressure Gauge
If the Water Heater being retrofitted is Steam-to-Water Model, a Compound Pressure Gauge is
included in the Retrofit Kit. The Compound Pressure Gauge range will be sized to match the
requirements of the Heater being retrofitted. In addition to the Gauge, all required fittings necessary
for installation will be included in the kit.
For Steam-to-Water Helitherm Models, the Compound Pressure Gauge will be mounted downstream
of the CXT-E Control Valve as shown in Figure 4-11. For Steam-to-Water Double-Wall Models, the
Gauge will be mounted on the steam inlet flange as shown in Figure 4-12.
CXT-E
ACTUATOR
LINKAGE
ASSY
CONTROL
VALVE
STEAM IN
SIDE VIEW
COMPOUND PRESSURE GAUGE
(SHOWN ROTATED FOR CLARITY)
PIG TAIL
1/4" COUPLING
SHELL
Figure 4-11. Compound Pressure Gauge Installation – Helitherm S/W Unit