Carrier AquaSnap 30MPA050 Installation Instructions Manual

Contents

43Fig. 39 — Typical Low Voltage Control WiringLEGENDALMR — Alarm Relay (24 V) 5 VA MaxAWG — American Wire GageCFR — Condenser Fan RelayCNFS — Condenser Flow SwitchCNP — Condenser PumpCNPI — Condenser Pump InterlockCWP — Chilled Water PumpCWPI — Chilled Water Pump InterlockDUAL — Dual Lead/Lag TemperatureLVT — Low Voltage Terminal StripNEC — National Electrical CodeOAT — Outside Air TemperatureSPT — Space Temperature. . . . . . — Field Power Wiring. . . . . . — Field Control Wiring——— — Factory-installed WiringNOTES:1. Factory wiring is in accordance with UL 1995 standards. Field modificationsor additions must be in compliance with all applicable codes.2. All units or modules have single point primary power connection. Main powermust be supplied from a field or factory supplied disconnect.3. Wiring for main field supply must be rated 75°C. Use copper conductors only.For unit sizes 016-045:a. Incoming wire size range for terminal block with MCA (minimum circuitamps) up to 120 amps is 14 AWG (American Wire Gage) to 2/0.b. Incoming wire size range for terminal block with MCA from 120.1 amps to310 amps is 6 AWG to 350 kcmil.c. Incoming wire size range for non-fused disconnect with MCA up to 50amps is 10 AWG to 2 AWG.d. Incoming wire size range for non-fused disconnect with MCA from 50.1amps to 90 amps is 6 AWG to 3/0.e. Incoming wire size range for non-fused disconnect with MCA from 90.1amps to 250 amps is 4 AWG to 350 kcmil.f. Incoming wire size range for fused disconnect is 6 AWG to 10 AWG.For unit sizes 050-071:a. Incoming wire size range for terminal block 4 AWG to 500 kcmil.b. Incoming wire size range for non-fused disconnect with MCA up to 170amps is 6 AWG to 3/0.c. Incoming wire size range for non-fused disconnect with MCA above 170.1amps is 4 AWG to 350 kcmil.4. Refer to certified dimensional drawings for exact locations of the main powerand control power entrance locations.5. Terminal 24 of the LVT is for control of chilled water pump (CWP) starter. Ter-minal 20 of the LVT is for control of condenser pump (CNP) starter or con-denser fan relay (CFR). The maximum load allowed for the relays is 5 VAsealed. 10 VA inrush at 24 VAC. Field power supply is not required.6. Terminal 25 of LVT is for an alarm relay. The maximum load allowed foralarm relay is 5 VA sealed, 10 VA inrush at 24 VAC. Field power supply isnot required.7. Make appropriate connections to LVT as shown for energy managementboard options. The contacts for demand limit and ice done options must berated for dry circuit application capable of handling 24 VAC load up to 50 mA.Installation of optional energy management board required.8. Remove jumper between terminals 16 and 17 when field chilled water pumpinterlock (CWPI) is installed.9. All discrete inputs are 24 VAC.

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