LAARS Pennant PNCV (Sizes 500-2000) - Install and Operating Manual - Manual (Page 26)

LAARS Heating Systems Page 26
5.3 External Staging Control Wiring
WARNING
Improper field wiring may result in fire or explosion
which can cause property damage, severe injury,
or death. Make only wiring connections which are
in accordance with the Installation and Operation
manual.
AVERTISSEMENT
Un câblage incorrect lors de l’installation peut
causer un incendie ou une explosion pouvant
entraîner des dommages matériels, de graves
blessures ou la mort. Ne faire seulement que les
connexions conformes au Manuel d’installation et
d’exploitation.
The wiring methods in this section must be
used to connect an external staging control, such as a
multiple boiler control, building automation system,
energy management system, etc.) Other wiring
methods may be unsafe.
Figure 15 shows how to wire the external
controller to the Pennant’s field wiring panel, which is
located on the right side of the Pennant.
Most of the time, the number of stages from the
external control will match the number of stages on the
Pennant. However, in some instances, the controller
will not have enough staging capability to work with
all of the stages on a Pennant unit (for instance, using
an 8-stage external control with four 4-stage Pennant
units.) In these instances, it is very important to follow
the instructions in this section Figure 15 shows how
to combine stages on the Pennant for those instances
when the external controller cannot control all the
stages available.
NOTE: The only time Pennant stages should be
jumpered is when the Pennant has an external control,
and the Pennant is used in Mode 6. In all other
modes, when the Pennant controls its stages, the
terminals shown in Figure 15 must NOT be jumpered.