10
installation
&
operation
manual
|
oxm
/
ogm
heating
system
4
HEATING SYSTEM
START-UP
WARNING
!
Hazardous voltage:
Before wiring, servicing or cleaning
the heating system, turn off the power and follow your
organization’s lockout and tagout procedure. Failure
to do so could allow others to turn on the power
unexpectedly, resulting in harmful or fatal electrical
shock.
NOTICE
Pump damage:
Do not run the motor/pump assembly
dry for more than a few seconds. Running a pump that
is not completely filled with fluid will cause damage to
the pump seal.
Proper heating operation:
The high-limit temperature
control relay (TCR2) must be set at least 18
°
F (10
°
C)
higher than the control temperature control relay (TCR1)
for proper heating operation. This will prevent nuisance
tripping of the high-limit circuit.
1.
Check and tighten all electrical and plumbing
connections.
2.
Ensure isolation valves are
open
before energizing
the system.
3.
Check the pump for proper rotation.
OOICE!
Do not run the motor/pump assembly dry for
more than a few seconds.
h
For three-phase heating systems, press and hold
the
prime
button while observing the rotation
of the pump motor fan at the rear of the motor.
If the pump motor is not rotating in the correct
direction, switch any two electrical leads at the
main power terminal block.
See
SECOIO 2.5
.
h
Single-phase systems are prewired to ensure the
pump motor rotates in the correct direction.
4.
Bleed all trapped air from the heating system by
opening a plug or pipe fitting at or near the pump.
Press and hold the
prime
button to evacuate any
remaining air in the lines.
OOE:
When priming the pump, the pressure
gauge should indicate an increase in
pressure. Your system’s operating pressure
may vary depending on the configuration
of the engine.
5.
Turn the
local
/
off
/
remote
switch to
local
or
remote
to energize the heating system.
6.
Once operation is satisfactory, turn the control
dial on the temperature control relay TCR1 to
the desired temperature setting for engine oil.
HOTSTART recommends a control temperature on
TCR1 of 104 °F (40 °C). The high-limit temperature
setting on TCR2 should be set at 194 °F (90 °C).
See
SECOIO 3.7
and
SECOIO 3.8
.
5
MAINTENANCE,
REPAIR AND
TROUBLESHOOTING
5.1
FAULTS
The fault light will display if:
•
The oil pump motor protection switch is
tripped (MPS1).
•
The oil high-limit temperature is exceeded
(TCR2).
A failure in the oil pump motor that
causes the motor protection switch
(MPS1) to trip will shut down the
heating system. A fault signal will be
transmitted and the fault light will
illuminate.
See Fig. 8
. If this failure
occurs, the
local
/
off
/
remote
switch must be switched to
off
and
the operator must press the MPS
reset/on button to reset the fault. (
See
SECOIO 3.6.
)
If there is a failure that causes a high temperature to
occur, the high-limit temperature controller (TCR2) will
shut down the heating system, including the pump
motor. A fault signal will be transmitted and the fault
light will illuminate. To restart the system, the
local
/
off
/
remote
switch must be switched to
off
and then
back to
local
or
remote
to resume operation once the
oil temperature drops below the high-limit preset (
See
SECOIO 3.7
.
)
OOE:
A high-limit fault can only occur when the
heating element is energized.
For additional troubleshooting,
see
SECOIO 5.5
.
PRIME
FAULT
LOCAL REMOTE
OFF
Figure 8. Fault
light as shown
on OXM/OGM
control box.