Laars Pennant PNCH, Installation And Operation Instructions Manual

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Low Temperature Pennant
Page 21
Single Two Circuit
Size Circuit Heater Pump
500 20 15 15
750 20 15 15
1000 (TACO) 20 / (B&G) 30 20 15
1250 30 25 15
1500 30 25 15
1750 — 25 20
2000 — 25 20
Table 10. Electrical Data (Amps).
Figure 10. Removing Jumpers.
Single pole switches, including those of safety
controls and protective devices must not be wired in a
grounded line.
All electrical connections are made in the field
wiring terminal strip, which is located to the left of the
blower.
NOTE: All internal electrical components have been
pre-wired. No attempt should be made to connect elec-
trical wires to any other location except the wiring box.
5.1 Main Power
5.1.1 Sizes 500-1500
Pennant sizes 500-1500 use a single 120-volt
fused supply. The installer can change the single
service heaters to use a separate circuit for the pump, if
desired. Instructions to make this change are found in
Section 5.1.3 .
Pennant 500-1500 main power (L1, N1 &
Ground) shall be connected to the three wires (10
AWG) supplied. Over-current protection ratings can be
found in Table 10 .
5.1.2 Sizes 1750-2000
Pennant sizes 1750-2000 require two 120-volt
fused supplies.
Heater circuit can be identified with 10AWG
wires to include black, white and green (all solid
colors). Pump circuit can be identified with three
12AWG wires to include a black wire with a white
tracer (stripe), a white and green wire.
5.1.3 Separate Pump Circuit
Conversion to separate pump circuit will neces-
sitate removing the three jumpers within the internal
wiring of the 120-volt portion of the heater (see Figure
10 ). Only do this with the power disconnected to the
unit!
To rewire the pump circuit, bring in another
120-volt fused supply (L2, N2 & Ground). Connect
incoming power (L2) to the main power switch using
spade (fork) terminal. From the other side of the main
power switch connect to the main terminal block using
a ¼" female insulated quick connect. This will be
the same position where the jumper had terminated
(see Figure 10 ). Connect N2 and Ground to the main
terminal block using ¼" female insulated quick connect
(refer to Figure 10 ).
5.1.4 All Sizes
Ladder diagrams are shown in Figures 12 and 13 .
Wiring diagrams are shown in Figures 14 through 16 .
Field wiring is shown in Figure 11 .
5.2 Field Wiring
Temperature Sensor : The Low Temperature
Pennant is controlled by a sensor that requires place-
ment in the system loop or storage tank. A sensor well
is shipped with the unit, as well. This sensor placement
allows the Pennant to be called for heat, based on the
system temperature. The sensor is wired to terminals
on the Pennant temperature control at the factory.
External Alarm : The field terminal strip has
terminals for a dry contact that is closed when the
ignition control locks out. These terminals are labeled
“ALRM” and “ALRM”.
Additional Call For Heat : Terminals labeled
“COMD” and “HTD” can be used to call the Pennant
for heat. These terminals are shipped with a jumper
between them. Remove the jumper to use these
terminals. The Pennant is controlled by the temperature
sensor, and the temperature must be calling for heat
for the Pennant to fire, regardless of any connections
between “COMD” and “HTD”, but the Pennant will
not fire if this connection is broken.
Other Field Interlocks : Other safety switches
that are intended to prevent the Pennant from firing
(such as fan proving switches, powered louver end
switches, etc.) The terminals are marked “OTHER
INTS <COM> <NO>”. These terminals are shipped
with a jumper between them. Remove jumper to
use these terminals. The Pennant will not fire if this
connection is broken.