Carrier NDK33BN0KB, Руководство по эксплуатации и обслуживанию

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62-61753-21 2-19
2.13 COMPONENT RESISTANCE & CURRENT DRAW DATA
Component Ohms Amps
Unloader/Economizer/Liquid Injection Solenoid
Valves 6.8 Ohms 1.65 Amps
Speed solenoid (SCS) 1.5 to 2.5 Ohms 3.0 - 8.0 Amps
12VDC Relay 10-00328-00 (CDCON, EVCON,
GPR, HTCON2, SSR, 52 Ohms ±10% 0.22 - 0.25 Amps
12VDC Relay 10-00433-01 & -06 (CCON,
GENCON, HTCON1, PSCON, PSCON2) 51 Ohms ±10% 0.29 Amps
12VDC Relay 10-00385-00 (CCONR, GENCONR,
HTCON1R, PSCONR) 80 Ohms ±15% 0.12 - 0.17 Amps
Fuel Solenoid
Red-Black Wires
11.1 to 13.4 Ohms 0.25 - 2.0 Amps
White-Black wires: Can not be accurately measured with Coil Commander in circuit. 30.0 to 40.0 Amps
Unit non-running amps (Refer to Note 2 in Section 7.2) 6-9 Amps
Glow Plug Amps Each Plug 4 Amps
Glow Plug Total Circuit 16 Amps
Starter Motor Less than 1 ohm but more than 0 270 - 380 amps
2.14 SAFETY DEVICES
System components are protected from damage caused by unsafe operating conditions by automatic shut-down of
the unit when such conditions occur. This is accomplished by the safety devices listed in the following table.
Unsafe Conditions Safety Device Device Setting
Excessive current draw by microprocessor Fuse (F1) Opens at 7.5 amps
Excessive current draw by speed relay Fuse (F2) Opens at 10 amps
Excessive current draw by run relay Fuse (F3) Opens at 7.5 amps
Excessive current draw by battery output Fuse (F5) Opens at 80 amps
Excessive current draw by control circuit Fuse (F6) Opens at 15 amps
Excessive current draw by battery charger input Fuse (F7/8) Opens at 3 amps (6 amps with
second battery charger)
Excessive current draw by generator/power supply
contactors Fuse (F9) Opens at 10 amps
Excessive current draw by heaters Fuse (F10/F11/12) Opens at 12 amps
Excessive condenser fan motor winding temperature Internal protector Auto reset
Excessive compressor motor winding temperature Internal protector Auto reset
Excessive evaporator motor winding temperature Internal protector Auto reset
2.15 REFRIGERANT CIRCUIT DURING COOLING
When cooling, the unit operates as a vapor compres-
sion refrigeration system. The main components of the
system are: the (1) scroll compressor, (2) air-cooled
condenser, (3) evaporator expansion valve, (4) direct
expansion evaporator and (5) economizer circuit.
The refrigeration system will operate in one of four
modes; Standard, Bypass, Economized or Null.
At start, and during periods of high refrigeration sys-
tem load, the system will operate in the bypass mode.
This allows the microprocessor to place the system in
operation at reduced capacity and measure the actual
load. If additional capacity is required and power is
available, the system will transition to the Standard
Mode. If the microprocessor calculates addition capac-
ity is required and power is available (such as periods
of high load or during pull-down), the system will tran-
sition to Economized Mode.
a. Bypass Mode
In bypass mode, (see Figure 2-9), the compressor
raises the pressure and the temperature of the refrig-
erant and forces it into the condenser tubes. The con-
denser fan circulates surrounding air over the outside
of the condenser tubes. The tubes have fins designed
to improve the transfer of heat from the refrigerant gas
to the air. This removal of heat causes the refrigerant
to liquify. Liquid refrigerant leaves the condenser and
flows to the receiver.