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Step 4 — Determine Controller Location — The
final step in the terminal selection and layout process is to
decide where the controllers will be placed.
The temperature control zones in the building will be de-
termined by the final partition layout. Before the final par-
tition layout has been determined, you must install enough
controllers to meet job requirement; the controllers can then
be relocated when the tenant layout is finished.
One of the main features of Moduline controls is that con-
troller locations can be changed quickly and easily at any
time.
Another main feature of Moduline controls is that more
than one unit can be controlled from a single thermostat. In
large interior zones the ‘‘master’’ unit (the one with the ther-
mostat) can be hooked up with control tubing to control sev-
eral ‘‘slaves’’. Table 13 shows the maximum number of units
that can be controlled by one controller.
Table 13 — Maximum Number of Units in an
Air Series on One Controller
MODEL
PLENUM
SIZE (in.)
FIRST UNIT
IN AIR
SERIES*
NUMBER OF UNITS ON ONE CONTROLLER
Single
Unit
Units in Air Series
2345
37HS1
5x7† X ————
7x7 X X X X —
9x9 X XXXX
11x11 X XXXX
37HS2
7x7 X ————
9x9 X X X X —
11x11 X X X X —
37HS4
9x9 X ————
11x11 X X X X —
13x13 X X X X —
*See Tables 6-8 for recommended combinations of units in air series.
†The 37HS1 unit with5x7size plenum is available with blank end only; mul-
tiple units of this size would not be used on one control.
NOTE: The conditions stated in Table 9 must be included in evaluations for
selecting the number of units in an air series.
GUIDELINES FOR CONTROLLER LOCATION
1. A master unit is mounted in the ceiling so that the air
intake is on the end of the unit opposite the end with the
control block and controller. (Fig. 26.)
2. A slave unit can receive air from either end of the unit.
Either end can be the inlet, assuming the inlet collar is
the same size as the connecting unit. At the same time, it
is good practice to place the ‘‘control’’end of a slave unit
downstream as shown in Fig. 26. Should the slave unit be
later converted to a master unit, the unit would be in its
correct configuration for control installation.
3. The volume controller for a single unit should be located
on the end of the unit opposite the inlet end. (Fig. 27.)
Fig. 26 — Air Intake on Master Unit
Fig. 25 — Flexible Duct Used with 90-Degree Bend
37