Évaluations - 2, GPA: 5
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Facilité d'utilisation
If this does not fix the leak, the connection must be reinstalled using a new ferrule and backup ring in the fitting. Contact your Carrier representative for assistance in locating these parts. After leak testing, evacuate, dehydrate, and recharge the circuit using an approved refrigerant recovery device. Correct type and amount of refrigerant are listed on unit nameplate and in base unit documentation. Fig. 2 — Installing Fittings and Valves, 30HX (Typical) 3 Fig. 3 — Installing Valves, 30GX Step 4 — Install Control Wiring Be sure all power to the unit is off before proceeding. Lock out and safety-tag all disconnects. Wires between field-installed components and unit control box must be enclosed in field-supplied conduit. Follow all local codes and NEC (National Electrical Code, U.S.A.). Wire size must be no. 16 AWG (American Wire Gage) (1.5 mm2) minimum. See Fig. 4 for field wiring. 30HX UNITS — Remove the screws holding the right-side access panel to the unit control box. Remove the right-side access panel and store in a safe area. Route wires through field-supplied conduit and attach the conduit to the unit control box, using a suitable conduit fitting and one of the available 7.8-in. knockout openings. Attach the other end of the conduit to the solenoid valve, using a suitable fitting. Repeat for the other circuit. 30GX UNITS — Install the accessory junction box included with this kit in the position shown on the 30GX chiller in Fig. 3. Route the waterproof conduit included with this kit between the accessory junction box and the factory-installed junction box. See Fig. 3 and 4. Route field-supplied conduits from the solenoid valves to the accessory junction box. ALL UNITS — Using good wiring practice, connect a white wire from the solenoid valve on circuit A to a white wire from the solenoid valve on circuit B. Connect both wires to the white wire in the factory-installed junction box (30GX), or unit wiring harness labelled ‘‘MLC-A& B’’(30HXA, HXC). Connect a pink wire from the solenoid valve on circuit A to the pink wire in the factory-installed junction box (30GX), or unit wiring harness labelled MLC-A (30HXA, HXC). Connect a gray wire from the solenoid valve on circuit B to the gray wire in the factory-installed junction box (30GX), or unit wiring harness labelled MLC-B (30HXA, HXC). Figure 4 shows the correct wiring for the minimum load control and the location of the wiring connection points on the chiller. 4 30GX080-176 30HX076-271 LEGEND MLC — Minimum Load Control TB — Terminal Block NOTE: See Fig. 3 for locations of junction boxes on unit. Fig. 4 — Minimum Load Control Wiring 5 Step 5 — Configure Unit for Minimum Load Control — Once the piping installation and wiring installation are complete, the chiller must be configured for minimum load control operation. This may be done using the unit keypad (HSIO-2). Set the LOCAL/OFF switch in the OFF position. 1. Press on the keypad. 2. Press the down arrow until the display reads: MIN. LOAD VALVE SELECT DISABLE 3. To enable the minimum load valve feature, press . 4. The display may read as follows. (If not, skip to Step 7.) PASSWORD PROTECTED FUNCTION ENTER PASSWORD 5. Press . 6. The HSIO-2 again displays the following: MIN. LOAD VALVE SELECT DISABLE 7. Press . The display changes to: MIN. LOAD VALVE SELECT ENABLE The chiller is now configured for minimum load valve control. Step6—Test Minimum Load Relay Outputs — After the accessory components are installed and the unit is recharged and reconfigured, test the operation of the relay and solenoid valve using the Quick Test software function. Test Circuit A as follows (the LOCAL/OFF switch must be in the OFF position): 1. Press on the HSIO-2 keypad. 2. Press the down arrow until the display reads: MIN. LOAD VALVE A RELAY IS OFF 3. Press . 4. The display may read as follows. (If not, skip to Step 7.) PASSWORD PROTECTED FUNCTION ENTER PASSWORD 5. Press . 6. The HSIO-2 again displays the following: MIN. LOAD VALVE A RELAY IS OFF 7. Press to energize the relay. The display reads: MIN. LOAD VALVE A RELAY IS ON An audible click will be heard. Verify that the solenoid valve for Circuit A is energized. 8. Press to turn off the minimum load valve relay for Circuit A. To check the operation of the solenoid valve on Circuit B, follow the same procedure as the preceding, but enter enter in Step 1, instead of . The display screens will be for Circuit B instead of A. After testing is complete, recheck all electrical connections for proper location and tightness. For 30HX units, replace and secure the access panels for the unit control box. For 30GX units, secure the junction box covers to the junction boxes. Step 7 — Adjust Setting of Minimum Load Ball Valve — Before the installation is complete, the minimum load ball valve must be adjusted to suit the application. Calibrate one circuit at a time as follows: 1. Adjust the ball valve so that it is approximately half open. 2. Operate the chiller in Manual Control mode...
Ce manuel est également adapté pour les modèles :Réfrigérateurs - 30GX080-176 (107.65 kb)