Emerson T124 Instruction Manual page 4

Types T124 and T134
Figure 4. Type T124 with Valve Condensation Chamber Tubing Bends Connection
All pressure equipment should be
installed in a non-seismic area;
should not be exposed to fire; and
should be protected from thunderbolt
(lightning) strikes.
Hot water and similar liquid systems
require a relief valve to prevent
dangerous overpressure due to
expansion. Instantaneous heaters,
when operated on intermittent demand
(as in domestic water heating), require
the following conditions for best
temperature regulation.
• Constant forced recirculation of fluid
through the heater.
• Omission of thermostat well to reduce
temperature lag.
Use of a thermostat compatible with the
heated medium is preferred over the
use of a standard thermostat installed
in a well which is compatible with the
heated medium. When the use of a well
is unavoidable, an appropriate heat
transfer medium should be installed
between the well and the thermostat.
4
NO. 8B TEE
CONTROL PIPE
CONDENSATION
CHAMBER BEND
DO NOT INSULATE
BELOW THIS LINE
NO. 5A RESTRICTION
ELBOW
Note
NO. 4A
BLEED PORT
NO. 5B OPEN ELBOW
CONDENSATION CHAMBER
RESTRICTION
BEND
△
The piping system must be
adequately designed and supported
to prevent extraordinary loads to the
pressure equipment.
Planning
1. Locate the regulator in a horizontal pipe. Provide
a trap ahead of the regulator to prevent water
hammer and erratic operation.
2. Use a strainer to avoid damaging effects of scale
and dirt in pipelines to protect the regulator.
3. Provide a three valve bypass to facilitate
inspection of the regulator without
interrupting service.
4. Position the thermostat horizontally. When
vertical or slanting, the tip end of the bulb must
point downward.
5. Locate the thermostat as close to the heater outlet
as practical. Expose the entire length of the bulb to
the active flow leaving the heater.
6. If the pressure rating of the heater or connected
equipment is less than the initial steam pressure,
provide a safety valve.
CAUTION