Resumen del contenido incluido en la página 1
48TC**16
SinglePackageRooftop
GasHeating/ElectricCoolingUnit
with Puronr(R---410A)Refrigerant
Size16
Installation Instructions
NOTE: Read the entire instruction manual before starting Units with Factory--Installed Disconnect ....... 15
the installation
Convenience Outlets ....................... 16
Factory--Option Thru--Base Connections
TABLE OF CONTENTS
(Electrical Connections) .................... 18
SAFETY CONSIDERATIONS .................... 2
Units without Thru--Base Connections ......... 18
Resumen del contenido incluido en la página 2
Outdoor Air Quality Sensor ................. 37 ! WARNING Space Relative Humidity Senor or Humidistat .. 37 Smoke Detector/Fire Shutdown (FSD) ......... 38 FIRE, EXPLOSION HAZARD Connecting Discrete Inputs .................. 38 Failure to follow this warning could result in personal injury or death. Communication Wiring -- Protocols ............ 39 Disconnect gas piping from unit when leak testing at General ................................. 39 pressure greater than 0.5 psig (3450 Pa). Pressures
Resumen del contenido incluido en la página 3
Vertical Connections / Economizer Horizontal Connections / Economizer C10864A Fig. 1 -- Unit Dimensional Drawing – 16 Size Unit 3 48TC**16
Resumen del contenido incluido en la página 4
C10862A Fig. 1 -- Unit Dimensional Drawing – 16 Size Unit (cont.) INSTALLATION Jobsite Survey 18” (457) * Complete the following checks before installation. 42" (1067) 1. Consult local building codes and the NEC (National Electrical Code) ANSI/NFPA 70 for special installa- tion requirements. 42" 2. Determine unit location (from project plans) or select (1067) 42" (1067) unit location. 3. Check for possible overhead obstructions which may interfere with unit lifting or rigging. * Required bottom
Resumen del contenido incluido en la página 5
Roof Mount — Step 3 — Inspect Unit Inspect unit for transportation damage. File any claim Check building codes for weight distribution with transportation agency. requirements. Unit operating weight is shown in Table 1. Confirm before installation of unit that voltage, amperage Table 1 – Operating Weights and circuit protection requirements listed on unit data plate agree with power supply provided. 48TC**16 COMPONENT UNITSLB(KG) Step 4 — Provide Unit Support BaseUnit 1380(627) Roof Curb Mount —
Resumen del contenido incluido en la página 6
C10772 Fig. 3 -- Roof Curb Details 6 48TC**16
Resumen del contenido incluido en la página 7
! CAUTION PROPERTY DAMAGE HAZARD C Failure to follow this caution may result in damage to roofing materials. Membrane roofs can be cut by sharp sheet metal MAXIMUM ALLOWABLE A DIFFERENCE IN. (MM) edges. Be careful when placing any sheet metal parts on such roof. B A-B B-C A-C 0.5” (13) 1.0” (25) 1.0” (25) C10001 Step 6 — Rig and Place Unit Fig. 4 -- Unit Leveling Tolerances When the unit is ready to be rigged and no longer will be Step 5 — Field Fabricate Ductwork lifted by a fork truck, the woo
Resumen del contenido incluido en la página 8
Positioning onCurb— Remove all shipping materials and top skid. Remove extra center post from the condenser end of the unit so that the For full perimeter curbs CRRFCURB074A00 and 075A00, condenser end of the unit matches Figs. 26 and 27. the clearance between the roof curb and the front and rear Recycle or dispose of all shipping materials. 1 base rails should be / in (6.4 mm). The clearance between 4 1 the curb and the end base rails should be / in (13 mm). For Step 7 — Convert to Horizontal a
Resumen del contenido incluido en la página 9
Two Position Damper Hood Removal and Setup -- Step 8 — Install Outside Air Hood Factory Option — Economizer Hood Removal and Setup -- 1. The hood is shipped in knock--down form and Factory Option — assembled to a metal support tray using plastic stretch 1. The hood is shipped in knock--down form and located wrap. Located in the return air compartment, the in the return air compartment. It is attached to the assembly’s metal tray is attached to the basepan and economizer using two plastic tie--wr
Resumen del contenido incluido en la página 10
Economizer Hood and Two--Position Hood — 5. Attach the post that separates the filters with the screws provided. NOTE: If the power exhaust accessory is to be installed 6. Open the filter clips which are located underneath the on the unit, the hood shipped with the unit will not be hood top. Insert the aluminum filters into the bottom used and must be discarded. Save the aluminum filter for filter rack (hood divider). Push the filter into position use in the power exhaust hood assembly. past the
Resumen del contenido incluido en la página 11
X Step 10 — Install Gas Piping 9” MINIMUM CLEARANCE Installation of the gas piping must be accordance with FOR PANEL REMOVAL GAS FROM local building codes and with applicable national codes. REGULATOR GAS * MANUAL GAS METER In U.S.A., refer to NFPA 54/ANSI Z223.1 National Fuel SHUTOFF VALVE * BASE UNIT Gas Code (NFGC). In Canada, installation must be accordance with the CAN/CSA B149.1 and CAN/CSA 48” MINIMUM B149.2 installation codes for gas burning appliances. DRIP LEG PER NFGC * This unit
Resumen del contenido incluido en la página 12
NOTE: If gas and/or electrical connections are not going to shutoff valve be located upstream of the sediment trap. occur at this time, tape or otherwise cover the fittings so that See Figs. 20 and 21 for typical piping arrangements for gas piping that has been routed through the sidewall of the moisture does not get into the building or conduit in the curb. See Fig. 22 for typical piping arrangement when interim. thru--base is used. Ensure that all piping does not block access to the unit’s mai
Resumen del contenido incluido en la página 13
When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFPA 54/ANSI Z223.1 NFGC latest edition (in Canada, CAN/CSA B149.1). In the absence of local building codes, adhere to the following pertinent recommendations: 1. Avoid low spots in long runs of pipe. Grade all pipe 1 /4--in. in every 15 ft (7 mm in every 5 m) to prevent traps. Grade all horizontal runs downward to risers. Use risers to connect to heating section and to meter. 2. Protect a
Resumen del contenido incluido en la página 14
The piping for the condensate drain and external trap can be completed after the unit is in place. See Fig. 25. MINIMUM PITCH 1” (25mm) PER BASE RAIL 10’ (3m) OF LINE 2˝ (51) MIN OPEN VENT TO ROOF SEE NOTE DRAIN C10884 Fig. 26 -- Conduit into Factory Option Disconnect ROOF CURB DRAIN PLUG NOTE: Trap should be deep enough to offset maximum unit static difference. A 4” (102) trap is recommended . C08022 Fig. 25 -- Condensate Drain Piping Details All units must have an external trap for condensa
Resumen del contenido incluido en la página 15
All Units — All field wiring must comply with NEC and all local requirements. Size wire based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 31 and the unit label diagram for power wiring connections to the unit power terminal blocks and equipment ground. Maximum wire size is 2/0 AWG per pole. Provide a ground--fault and short--circuit over--current protection device (fuse or breaker) per NEC Article 440 (or local codes). Refer to unit informative data plate for MOCP (Maxi
Resumen del contenido incluido en la página 16
Non--powered type: This type requires the field Units Without Disconnect Option TB1 installation of a general--purpose 125--volt 15--A circuit powered from a source elsewhere in the building. Observe 11 12 13 national and local codes when selecting wire size and conduit requirements, fuse or breaker requirements and disconnect switch size and location. Route 125--v power Disconnect supply conductors into the bottom of the utility box per NEC containing the duplex receptacle. L1 L2 L3 Unit--power
Resumen del contenido incluido en la página 17
Test the GFCI receptacle by pressing the TEST button on Installing Weatherproof Cover: A weatherproof the face of the receptacle to trip and open the receptacle. while-in-use cover for the factory-installed convenience Check for proper grounding wires and power line phasing outlets is now required by UL standards. This cover cannot if the GFCI receptacle does not trip as required. Press the be factory-mounted due its depth; it must be installed at unit RESET button to clear the tripped condition
Resumen del contenido incluido en la página 18
Factory--Option Thru--Base Connections Check tightness of connector lock nuts before connecting (Electrical Connections)— electrical conduits. 1 Field--supplied and field--installed liquid tight conduit This service connection kit consists of a / --in electrical 2 1 connectors and conduit may be attached to the connectors bulkhead connector and a 1 / --in electrical bulkhead 2 on the basepan. Pull correctly rated high voltage and low connector, connected to an “L” bracket covering the voltage th
Resumen del contenido incluido en la página 19
Unit without Thru--Base Connection Kit — Typical Central Thermostat Terminal Pass the thermostat control wires through the bushing on the Connections Board unit end panel. Route the wire through the snap- -in wire tie X and up to the web bushing near the control box.. Route the wire through the bushing and into the bottom left side of the C C control box after removing one of the two knockouts in the T corner of the box. Use a connector at the control box to H G G protect the wire as it passes i
Resumen del contenido incluido en la página 20
R Humidi--MiZer Control Connections Humidi--MiZer – Space RH Controller — NOTE: The Humidi--MiZer is a factory installed option. The Humidi--MiZer dehumidification system requires a field--supplied and --installed space relative humidity control device. This device may be a separate humidistat control (contact closes on rise in space RH above control setpoint) or a combination thermostat--humidistat control R device such as Carrier’s EDGE Pro Thermidistat with % RELATIVE HUMIDITY isolated contac
