STEP 4: HYDRONIC COMPONENTS
The diagrams in Figures 3.4 through 3.7 show typical
locations of various hydronic components required for
Multi-Temp heating plants. In all cases, installation
should be in accordance with component manufactur-
er’s recommendations (literature, if applicable, is pack-
aged with component). In addition, the following guide-
lines should be followed.
PRESSURE RELIEF VALVES:
One supplied for each
module. Install relief valves with spindle in the vertical
position (i.e., valve discharge in horizontal) with cou-
pling and nipple in 3/4" tapping at top of modules. In-
stall field-supplied valve discharge piping (Figure 3.3).
CAUTION: Piping must be installed from the relief
valve discharge so there will be no danger of
scalding personnel.
TEMPERATURE/PRESSURE INDICATORS:
One
temperature/pressure indicator supplied for each mod-
ule. INSTALL AFTER ASSEMBLING JACKET.
DRAIN VALVES:
One supplied for each module. In-
stall below return connection.
PRESSURE REDUCING (FILL) VALVE:
Follow manu-
facturer’s installation instructions.
AIR SEPARATOR
(1)
:
Locate in the supply line between
boiler and system pump (where it will protect all mod-
ules under all operating conditions). Follow manufac-
turer’s installation instructions.
AIR ELIMINATOR
(1)
:
Install on air separator (where it
will protect all modules under all operating conditions).
(1)
For heating plants providing volume water heating only (instantaneous recovery or with storage tank), see Figures 3.6
and 3.7 on page 10 for installation guidelines.
RELIEF VALVE
DISCHARGE
PIPING
MUST
TERMINATE
6" ABOVE
FLOOR
SAME SIZE
OR LARGER
THAN OUTLET
NIPPLE
COUPLING
PRESSURE
RELIEF VALVE
(VERTICAL)
FIGURE 3.3
7
STEP 3: SUPPLY & RETURN HEADERS (CONTINUED)
EXAMPLES
OF TYPICAL
SUPPLY & RE-
TURN WATER
PIPING FOR
HEADERS.
NO MORE
THAN SIX
MODULES
MAY BE
DIRECTLY
CONNECTED!
IN-LINE - 6 MODULES OR LESS
BACK TO BACK
MORE THAN 6 MODULES
IN-LINE - MORE THAN 6 MODULES
SUPPLY
RETURN
SUPPLY
RETURN
SUPPLY
RETURN
WARNING: Never install any type of valve between
the pressure relief valve and the heating plant mod-
ules! Failure to comply with this warning can result
in a heating plant explosion causing extensive
property damage, severe personal injury or death!