Boiler Operating Temperature Control; Electrical Requirements; Remote Temperature Control - Lochinvar Copper-Fin II CX401 Designer's Manual

NOTE:
When the unit
BOILER OPERATING
is installed in
TEMPERATURE CONTROL
Canada, it MUST
conform to the
In the absence of a remote temperature
CAE C22.1,
control, a digital operator controls the boiler
Canadian
operating temperature. The sensing element
Electrical Code,
for the operator is placed in a bulb well,
Part 1
installed in the inlet side of the heat
and/or local
exchanger front header. Due to the location
Electrical Codes.
of the temperature sensor, the operator will
generally require a lower temperature
setpoint to achieve the desired discharge
water temperature from the boiler. This
sensing element location allows a boiler
operating with a low to moderate flow rate to
sustain longer burner "ON" cycles, based on
high discharge water temperatures.
For example, a boiler operating with a 180°F
discharge and a 20°F temperature rise would
require approximately a 160°F to 165°F set
point with the temperature sensor installed on
the inlet side of the heat exchanger. The exact
temperature set point is based on system
requirements.
REMOTE TEMPERATURE
CONTROL, CONNECTION
TO TERMINAL STRIP
A remote temperature control may be
connected to the boiler. The boiler is
equipped with a terminal strip to allow
easy connection. Connection to the terminal
strip will allow the remote temperature control
to make and break the 24 VAC boiler control
24
L o c h i n v a r '
D E S I G N E R S G U I D E
circuit, turning the boiler on and off based on
building and system demands.
ELECTRICAL
REQUIREMENTS
(North America)
The appliance is wired for 120 volts.
1.
All wiring between the unit and field
installed devices shall be made of type
T wire [63°F (35°C) rise].
2.
The pump must run continuously when
the unit is firing.
3.
It is recommended that the boiler and
pump be wired on separate circuits with
properly sized circuit breakers.
(TABLE N) – AMP DRAW DATA
MODEL FAN(S)
NUMBER
CH401 3.6
CH501 3.6
CH651 5.4
CH751 5.4
CH991 3.2
CH1261 3.2
CH1441 6.7
CH1801 6.7
CH2071 6.7
-
C O P P E R F I N I I B O I L E R
CONTROLS APPRX. TOTAL AMPS
@ 120 VAC
2.7 6.3
2.7 6.3
3.4 8.8
3.4 8.8
7.2 10.4
7.2 10.4
7.2 13.9
7.2 13.9
7.2 13.9
6 1 5 - 8 8 9 - 8 9 0 0