Install Instructions

9
ampacity and temperature. Use copper wire only
with insulation rated for 75 °C. Check state and
local requirements.
NOTE: Read the data name plate before
connecting unit so that you will become
familiar with the specications. All electrical
connections to the unit are provided and
located for ease of proper installation.
IMPORTANT: Use only copper wire of proper
size and make sure all terminations are very
tight. Do not use aluminum wire!!
3. CIRCULATOR POWER SUPPLY: Terminals
identied as C1(L) and C2(N) at the bottom
of the control panel (Figure 5) may be used to
supply one circulator pump power. The circulator
motor shall not be larger than 1/6 horsepower
with a maximum 5.0 amp rating. Wiring from the
control panel to the pump should have insulation
rated at 75°C. Circuit protection is provided by a
15 amp breaker or fuse (depending on option)
on the control board.
NOTE: If the circulator pump is larger
than the maximum size listed above, then
a separate circulator pump relay must be
provided with separate overload protection.
Where more than one circulator is used for
zoning, it must be installed and protected
according to approved electrical codes.
CONTROL INFORMATION
CONTROL BOARD SPECIFICATIONS:
Dimensions: 5-7/8"(W) x 9-3/8" (L) x 1-5/8" (H)
Operating Control Outlet Water Tempera-
ture:
90°F - 180°F (adjustable)
High Limit Control Outlet Water Tempera-
ture:
200°F (xed)
Control Input Voltage: 120V ac
Control Output Voltage: 120V ac, 5A max. (cir-
culator terminal)
POWER OUTPUT: One 120V ac pump output is
switched by an onboard circulator relay. The load
current is limited and must not exceed 5A.
CONTROL BOARD POWER CONSUMPTION:
0.8A max.
LED DISPLAY LIGHTS (Figure 6): A total of 8 LED
indicator lights display the following information:
(1) T-T (Green): LED is lit when thermostat is
calling for heat.
(2) Fault (Red): LED is lit/ashes when there is
an operating error/safety fault.
(3) Safety Switch (Green): LED is lit when there
are no safety faults.
(4) Circ (Green): LED is lit when circulator termi-
nals are energized.
(5) Heating Element#1 (Green): LED is lit when
element#1 is energized.
(6) Heating Element#2 (Green): LED is lit when
element#2 is energized.
(7) Heating Element#3 (Green): LED is lit when
element #3 is energized.
(8) Heating Element#4 (Green): LED is lit when
element#4 is energized.
FIGURE 6
SIGNAL/CONTROL INPUTS:
TT: Thermostat or zone valve end switch, switch-
ing input, closed is activation.
HL: High limit temperature sensors (factory in-
stalled), normally closed.
LWC: Low water cutoff (optional) end switch,
normally closed (factory installed jumper).
FLOW: Flow switch (optional) end switch, normally
closed (factory installed jumper).