Hotstart DLV, Руководство по установке и эксплуатации

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12
installation
&
operation manual
|
dlv heating system
3.3 PRESSURE/TEMPERATURE GAUGES
The DLV model features a temperature/pressure gauge mounted at the inlet of each heating tank. The
gauges will indicate a pressure increase when the pump motor is engaged by holding the
on
/
off
/
prime
switch to
prime
or during normal operation. The gauges will also indicate the current temperature of the
respective fluid.
OOE: Your system’s operating pressure may vary depending on the configuration of the engine.
3.4 PRESSURE RELIEF VALVE
CAUTION
!
Pressurized steam hazard: Coolant pressure relief valve outlet must be plumbed to a safe area in case an
over-pressure release of heated coolant occurs.
The coolant pressure relief valve is mounted at the coolant heating tank outlet and is set to relieve at
100 psi (690 kPa). During normal operation, pressure release events are rare. To safeguard personnel and
equipment, attach an appropriately sized pipe to the pressure relief valve outlet and direct flow to a safe
area, bucket or other catch-basin.
The oil pump pressure relief valve is internal to the pump and releases pressure from the discharge side of
the pump to the suction side of the pump at 75 psi (525 kPa). No plumbing for this component is required.
3.5 HIGH-LIMIT TCR (TEMPERATURE CONTROL RELAY)
The high-limit TCR for each fluid system
(TCR2 and TCR4) 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 both high-limit TCRs 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. 6 .
3.6 CONTROL TCR
(TEMPERATURE CONTROL RELAY)
The control TCRs are used to control the
temperature of the fluid in each system. 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 coolant control temperature
relay (TCR1) is 122 °F (50 °C). The standard
setting for the oil control temperature relay
(TCR3) is 104 °F (40 °C). See Fig. 6 .
100 100 0 0
11 12 11 12
13 14 A2- 13 14 A2-
A3 A1 A3 A1
T1 T2 T3 T1 T2 T3
Figure 6. DLV system control TCRs and
high-limit TCRs. The standard setting for
coolant control TCR1 is 122 °F (50 °C); the
standard setting for oil control TCR3 is
104 °F (40 °C).
100 100 0 0
11 12 11 12
13 14 A2- 13 14 A2-
A3 A1 A3 A1
T1 T2 T3 T1 T2 T3
HIGH LIMIT
COOLANT
HIGH LIMIT
OIL
2 4