E-18
Enerco | Heatstar ERSP Series Heater
Operating Instructions and Owner’s Manual
SECTION 7
Wiring
Heaters are normally controlled by thermostats. Line voltage
thermostats are wired directly (see Figure 15), 24V thermostats
are wired directly by finding and removing the jumper wire on the
back of the burner box and wiring the thermostat to the terminals
(see Figure 16). Heaters must be grounded in accordance with the
National Electric Code ANSI/NFPA- 70 or current Canadian Electrical
Code, CSA C22.1. Heaters may also be controlled with a manual line
voltage switch or timer switch in place of the thermostat.
FIGURE 15: Line Voltage Thermostat Wiring
FIGURE 16: Low Voltage Thermostat Wiring
FIGURE 18: Ener-Radiant SP Burner Internal Wiring Ladder
Diagram
FIGURE 17: Ener-Radiant SP Burner Internal Wiring
•
If any of the original wire as supplied with the
appliance must be replaced, it must be replaced with
wiring material having a temperature rating of at
least 105°C and 600 volts.
•
Each burner must be electrically grounded in
accordance with the National Electric Code ANSI/
NFPA - 70 or current Canadian Electrical Code, CSA
C22.1.
GREEN
RED
RED
GREEN
YELLOW
GREEN
BLACK
BLACK
RED
BLUE
YELLOW
RED
RED/YELLOW
WHITE
GREEN
WHITE
BLACK
C1
Igniter & Flame Sense
Pressure Switch
Thermostat
Blower Motor Cavity
Load
Line
Replace Any Wiring With Same Ratings
All Quick Connects Are Fully Insulated (Except Igniter)
Chassis Wiring Is 18 AWG / 105 Degrees C / @ 600 Volts
Igniter Wire Is 16 AWG / 25 KVDC / 10 KVDC
Crimp Caps Are # CE5 / 105 Degrees C
CONTROL BOARD
Earth Ground
N
GV
M
T1
L1
LED
FC+
FC-
IGN
TH
PSW
V1
NC
IND
L1
24 VAC
GND
V2
Earth &
Chassis Ground
GND
V2
V1
PCB
PCB
GV
PRESSURE SWITCH
PCB
24 VAC
JUMPER (Optional)
T'STAT (Optional)
TH
PCB
PSW
PCB
BURNER
IGNITER/FLAME SENSOR
IGN
PCB
M
IND
L1
PCB
PCB
N
L1
T1
PRIMARY - 120V
SECONDARY - 24V
SECTION 8
Operation & Maintenance
Sequence of Operation
1. Turn the thermostat up. When the thermostat calls for heat,
blower motor will energize.
2. When the motor approaches nominal running RPM, the air
proving switch closes and activates the ignition module.
3. Once the igniter sparks, the gas valve is energized.
4. If a flame is detected, the gas valve remains open. When the call
for heat is satisfied the system control mechanism de-energizes
the burner line voltage supply and the gas valve is turned off.
5. If no flame is detected, the gas valve is closed, and a purge
period begins. After the purge, the module acts to power
the igniter for a second trial for ignition period. If flame is still
not established, a third and final purge and trial cycle begins.
After three trials, the module will lockout until reset. Reset is
accomplished by removing power from the module for at least
five (5) seconds (thermostat cycle required.)