Carrier 48HX- User Manual
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Table of Contents:
- Page 2 – ELECTRIC HEAT POWER DIAGRAMS; PLUG LOCATION REFERENCE
- Page 4 – Gas Heat Unit Operation —
- Page 6 – INPUT/OUTPUT CHANNEL DESIGNATIONS — STAGED GAS HEAT CONTROL BOARD
- Page 7 – INPUT/OUTPUT CHANNEL DESIGNATIONS — CONTROLS EXPANSION BOARD
- Page 14 – PAGE
- Page 24 – Fig. 18 — Space Temperature Averaging Wiring
- Page 25 – Fig. 19 — Electric Heater Power Diagrams
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-56480002-01
Printed in U.S.A.
Form 48/50A-3W
Pg 1 508 4-08
Replaces: New
Wiring Diagrams
INDEX
ACCESSORIES
NOTE: Accessory wiring is shown on the unit wiring diagrams. Refer
to the appropriate drawing for accessory wiring.
TYPE
UNIT
NUMBER
FIG. NO.
Component Arrangement
48/50A2,A3,A4,A5020-035
48EJ502489
1
48/50A2,A3,A4,A5040-060
48EJ503652
2
Power Schematic
48/50A2,A3,A4,A5020-050
50EJ500470
3
48/50A2,A3,A4,A5060 RTPF
50EJ500469
4
48/50A2,A3,A4,A5060 MCHX
50EJ500420
5
Main Control Box Circuit
48/50A2,A3,A4,A5020-060
50EJ500440
6
Auxiliary Control Box Wiring
48/50A2,A3,A4,A5020-060
48EJ503076
7
Controls Expansion
Board Wiring
48/50A2,A3,A4,A5020-060
48EJ503086
8
Gas Heat Control Circuit
(2-Stage Heat)
48A2,A3,A4,A5020-050
48EJ503079
9
48A2,A3,A4,A5060
48EJ503679
10
Gas Heat Control Circuit
(Staged Gas Heat)
48A2,A3,A4,A5020-050
48EJ502488
11
48A2,A3,A4,A5060
48EJ503680
12
Electric Heat Control Circuit
50A2,A3,A4,A5020-050
48EJ503080
13
50A2,A3,A4,A5060
48EJ503655
14
ACCESSORY
UNIT
FIG. NO.
Motormaster® V Low Ambient Controller
48/50A2,A3,A4,A5020-035
15
48/50A2,A3,A4,A5040,050 AND 060 RTPF Units
16
48/50A2,A3,A4,A5060 MCHX Units
17
Space Sensor Temperature Averaging
48/50A2,A3,A4,A5020-060
18
Thermostat
48/50A2,A3,A4,A5020-060
6
Remote Economizer Position Override
Remote Economizer Minimum Position Set Point
Remote 4 to 20 mA Economizer Position
Space IAQ Sensor
Outdoor Enthalpy Changeover Sensor
48/50A2,A3,A4,A5020-060
7
Differential Enthalpy Changeover Sensor
Outdoor Air Quality Sensor
48/50A2,A3,A4,A5020-060
8
Remote Supply Air Set Point
Demand Limit Controller
Fan Status Switch
Demand Limit
Fire Pressurization
Fire Evacuation
Fire Smoke Purge
IAQ Override Switch
WEATHERMAKER
®
48/50A2,A3,A4,A5020-060
Single Package Rooftop
Gas Heating/Electric Cooling and Electric Cooling Units
with
COMFORT
LINK™ Controls
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Summary
2 ELECTRIC HEAT POWER DIAGRAMS NOTE: All power leads connect to (single) TB7 power terminal block.There are 2 or 3 conductors per terminal. LEGEND AND NOTES FOR FIG. 1-14 UNIT SIZES 50A2,A3,A4,A5 ELECTRICAL CHARACTERISTICS NOMINAL kW FIG. NO. QTY PER UNIT Lo Heat Hi Heat 020-050 208/230-3-60 36 72 1...
4 If the control is connected to a ComfortID™ system, the room terminals are equipped with microprocessor controls that give commands to the base module. If linkage is active, the control module will replace local Comfort Link™ set points and occupancy data with linkage supplied data. If Temperature...
6 INPUT/OUTPUT CHANNEL DESIGNATIONS — ECONOMIZER CONTROL BOARD (ECB1) INPUT/OUTPUT CHANNEL DESIGNATIONS — VAV CONTROL BOARD (ECB2) INPUT/OUTPUT CHANNEL DESIGNATIONS — STAGED GAS HEAT CONTROL BOARD POINT NAME POINT DESCRIPTION I/O POINT NAME PLUG AND PIN REFERENCE SIGNAL PIN(S) PORT STATE INPUTS RMTI...
