Hotstart OLA, Руководство по установке и эксплуатации, Страница: 16 / 21

10
installation
&
operation manual
|
ola heating system
3.2 SYSTEM COMPONENTS
3.2.1 MOTOR PROTECTION SWITCH
The motor protection switch (MPS) protects the pump
motor from overloads. The MPS will be set at the full load
amperage of the motor when shipped from the factory.
To reset the MPS, the
local
/
off
/
remote
switch must
be switched to
off
and the operator must press the
reset
button or press the MPS reset/on button (B) . See
Fig. 7 . For additional troubleshooting, see SECOIO 4.5 .
3.2.2 CONTROL TCR (TEMPERATURE
CONTROL RELAY)
The control TCR is used to control the temperature of
the fluid. The control TCR uses a resistance temperature
device (RTD) to sense the temperature of the fluid as it
enters the heater. The standard setting for the control
temperature relay (TCR1) is 104 °F (40 °C). See Fig. 7 .
3.2.3 HIGH-LIMIT TCR (TEMPERATURE
CONTROL RELAY)
The high-limit TCR (TCR2) is a protection device to
prevent fluid overheating. The high-limit TCR uses a
resistance temperature device (RTD) located near the
tank outlet. The default setting for the high-limit TCR is
194 °F (90 °C) and should always be at least 18 °F (10 °C)
higher than the control TCR set point. The high-limit TCR
hysteresis is not used in the high-limit control. See Fig. 7 .
Figure 7. OLA motor protection switch (left), showing stop/off (A)
and reset/on
(B)
buttons. To reset the MPS, the heating system must
be switched off and either the reset button or the MPS reset/on
button must be pressed.
OLA control TCR and high-limit TCR (above). The standard setting
for TCR1 control dial
(C) is 104 °F (40 °C).
L1 L2
TB1
L3
L1 L2 L3
13
T1 T2 T3
13
MPS1
TB2
X1
2 4 6
1 3 5
7 8 9 1011121314
A1 A3
T1 T2 T3
13 14 A2-
11 12
TCR1
CONTROL
0 100
A1 A3
T1 T2 T3
13 14 A2-
11 12
TCR1
HIGH
LIMIT
0 100
L1 L2
TB1
L3
L1 L2 L3
13
T1 T2 T3
13
MPS1
TB2
X1
2 4 6
1 3 5
7 8 9 1011121314
A1 A3
T1 T2 T3
13 14 A2-
11 12
TCR1
CONTROL
0 100
A1 A3
T1 T2 T3
13 14 A2-
11 12
TCR1
HIGH
LIMIT
0 100
A
B
L1 L2
TB1
L3
L1 L2 L3
13
T1 T2 T3
13
MPS1
TB2
X1
2 4 6
1 3 5
7 8 9 1011121314
A1 A3
T1 T2 T3
13 14 A2-
11 12
TCR1
CONTROL
0 100
A1 A3
T1 T2 T3
13 14 A2-
11 12
TCR2
HIGH
LIMIT
0 100
A
B
C