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48

Fig. 66 — V-Belt Force Label

BELT TENSION METHOD
Requires belt tension gage that measures tension in belt in units of

lbs force.

Fig. 67 — Belt Drive Motor Mounting

Pre-Start and Start-Up

This completes the mechanical installation of the unit. Refer to the

unit’s Service Manual for detailed Pre-Start and Start-Up instruc-

tions. Download the latest versions from HVAC Partners

(www.hvacpartners.com).

TABLE 1

TABLE 2

BELT 

CROSS 

SECTION

SMALLEST 

SHEAVE 

DIAMETER

BELT DEFLECTION FORCE (LBS)

UNNOTCHED 

BELTS

NOTCHED BELTS

USED

NEW

USED

NEW

A, AX

3.0-3.6

3.7

5.5

4.1

  6.1

3.8-4.8

4.5

6.8

5.0

  7.4

5.0-7.0

5.4

8.0

5.7

  8.4

B, BX

3.4-4.2

—

—

4.9

  7.2

4.4-5.6

5.3

7.9

7.1

10.5

5.8-8.6

6.3

9.4

8.5

12.6

BELT CONDITION

TENSION FORCE IN BELT (LBS)

New

100

Used

80

TORQUE ALL SHEAVE SET SCREWS TO 110-130 in. lbs

SET
SCREW

SET
SCREW

STRAIGHT
EDGE

BELT SPAN

BELT DEFLECTION FORCE - SEE TABLE 1

DEFLECTION = BELT SPAN
 

 

   64

BLOWER PULLEY

V-BELT

MOTOR 
PULLEY

MOTOR

MOTOR MOUNTING

PLATE 

MOUNTING

BOLTS (4) 

Содержание 50HC Series

Страница 1: ...ontrol Factory Option 45 PremierLink Factory Option 45 RTU Open Controller Factory Installed Option 45 Smoke Detectors 45 ADDITIONAL APPLICATION DATA CONTROLLER OPTIONS Step 12 Adjust Factory Installe...

Страница 2: ...410A refrigerant systems operate at higher pressures than standard R 22 systems Do not use R 22 service equipment or components on R 410A refrigerant equipment WARNING PERSONAL INJURYAND ENVIRONMENTAL...

Страница 3: ...d Diagnostic 1 PremierLink Controller 2 RTU Open Multi Protocol Controller 6 Electro mechanical w 2 speed fan and W7220 Economizer controller Can be used with W7220 EconoMi er X with Fault Detection a...

Страница 4: ...4 Fig 2 50HC 04 06 Units Built On and After 4 15 2019...

Страница 5: ...5 Fig 3 50HC 04 06 Units Built Prior to 4 15 2019...

Страница 6: ...6 Fig 4 50HC 04 06 Corner Weights and Clearances...

Страница 7: ...7 Fig 5 50HC 04 06 Base Rail Details...

Страница 8: ...8 Fig 6 50HC 04 06 Thru the Base Charts...

Страница 9: ...3 Rig and place unit 4 Convert unit to side duct connection arrangement 5 Install field fabricated ductwork at unit duct openings 6 Install outdoor air hood 7 Install condensate line trap and piping 8...

Страница 10: ...ENGINEERING MANUFACTURING ENGINEERING REQUIREMENTS SIZE DRAWING NUMBER REV T 005 Y 002 DRAFTER CHECKER D 48TC400427 B WEIGHT MMC 06 17 11 SHEET 5 OF 5 SURFACE FINISH MFG PURCH MODEL INTERNAL USE ONLY...

Страница 11: ...onto the curb recheck gasketing on curb POSITIONING ON CURB Position unit on roof curb so that the following clearances are maintained 1 4 in 6 4 mm clearance between the roof curb and the base rail i...

Страница 12: ...atherproof all external ductwork joints and roof or build ing openings with counter flashing and mastic in accordance with applicable codes Do not cover or obscure visibility to the unit s informative...

Страница 13: ...ith the unit will not be used and must be discarded Save the aluminum filter for use in the power exhaust hood assembly 1 The indoor coil access panel will be used as the top of the hood Remove the sc...

Страница 14: ...ith the limitations of minimum 63 F 33 C rise FIELD POWER SUPPLY If equipped with optional powered convenience outlet the power source leads to the convenience outlet s transformer primary are not fac...

Страница 15: ...nd shaft are shipped in the disconnect or HACR enclosure Assemble the shaft and handle to the switch at this point Discard the factory test leads see Fig 22 See Fig 21 Connect field power supply condu...

Страница 16: ...he handle socket re install 3 hex screws on the NFD enclosure 12 Re install the unit front panel Fig 23 NFD Enclosure Location Fig 24 NFD Handle and Shaft Assembly Field Install the HACR Shaft and Han...

Страница 17: ...Check all factory and field electrical connections for tightness CONVENIENCE OUTLETS Two types of convenience outlets are offered on 50HC models non powered and unit powered Both types provide a 125...

Страница 18: ...let has a duty cycle limitation The transformer is intended to provide power on an intermittent basis for service tools lamps etc it is not intended to provide 15 amps loading for continuous duty load...

Страница 19: ...side panel Remove one of the two knockouts located on the bottom left side of the unit control box Use this hole for the control conduit UNITS WITHOUT THRU BASE CONNECTIONS ELEC TRICAL CONNECTIONS 1 I...

Страница 20: ...iring Units Without Thru Base Connection Kit Pass the thermostat control wires through the hole provided in the corner post then feed the wires through the raceway built into the corner post to the co...

Страница 21: ...ig 40 Typical Single Point Installation Low Voltage Control Connections All units except size 06 575V Pull the low voltage control leads from the heater module s VIO and BRN two of each if two modules...

Страница 22: ...may be a separate humidistat control contact closes on rise in space RH above control setpoint or a combination ther mostat humidistat control device such as Carrier s Edge Pro Thermidistat with isola...

Страница 23: ...des the UL required clearance between high voltage and low voltage wiring 3 The Thermidistat has dry contacts at terminals D1 and D2 for dehumidification operation see Fig 46 The dry contacts must be...

Страница 24: ...Humidi MiZer Adaptive Dehumidification System and Edge Pro Thermidistat Device Rc Rh W1 G Y2 C O W2 B Y1 OAT RRS SRTN HUM D1 D2 V Vg X C G W2 W1 Y2 Y1 R EDGE Pro THERMIDISTAT Unit CTB THERMOSTAT Conne...

Страница 25: ...25 Fig 47 Electro Mechanical Control Wiring Diagram...

Страница 26: ...26 Fig 48 Electro Mechanical Control Wiring Diagram with Humidi MiZer System...

Страница 27: ...27 Fig 49 Electro Mechanical Control Power Wiring Diagram...

Страница 28: ...28 Fig 50 ComfortLink Control Wiring Diagram 50HC 3 5 Ton Units NOTE See Fig 51 for all NOTE references in this wiring diagram...

Страница 29: ...29 Fig 51 50HC ComfortLink Control with Humidistat Power Wiring Diagram 208 230V 460V 575V 3 Phase...

Страница 30: ...30 Fig 52 50HC ComfortLink Control with Humidi MiZer System Power Wiring Diagram 208 230V 460V 575V 3 Phase...

Страница 31: ...31 Fig 53 PremierLink Wiring Schematic...

Страница 32: ...32 Fig 54 PremierLink Wiring Schematic with Humidi MiZer System...

Страница 33: ...33 Fig 55 RTU Open System Control Wiring Diagram...

Страница 34: ...34 Fig 56 RTU Open System Control Wiring Diagram with Humidi MiZer System...

Страница 35: ...vides status for normal operation setup parameters checkout tests and alarm and error conditions with a 2 line 16 character LCD display and four button keypad Electrical Rated Voltage 20 to 30 vac RMS...

Страница 36: ...Sensor Input e g CO2 sensor IAQ COM COM Air Quality Sensor Common IAQ 24V 24 vac Air Quality Sensor 24 vac Source ACT 2 10 2 10 vdc Damper Actuator Output 2 10 vdc ACT COM COM Damper Actuator Output C...

Страница 37: ...20 Controller Navigation Buttons To use the keypad when working with Setpoints System and Ad vanced Settings Checkout tests and Alarms 1 Navigate to the desired menu 2 Press the Enter button to displa...

Страница 38: ...OUT terminal COOL Y2 IN OFF ON OFF SECOND STAGE COOLING DEMAND Y2 IN Y2 I signal from space thermostat or unitary controller for second stage cooling ON 24 vac on terminal Y2 I OFF 0 vac on terminal Y...

Страница 39: ...o as the Compressor lockout At or below the set point the Y1 O and Y2 O will not be energized on the controller DRYBLB SET 63 F 17 C 48 F to 80 F 9 C to 27 C increment by 1 degree OA DRY BULB TEMPERAT...

Страница 40: ...he capacity of the RTU The value is found on the nameplate label for the specific unit AUX1 OUT NONE NONE ERV EXH2 SYS Select OUTPUT for AUX1 O relay NONE not configured output is not used ERV Energy...

Страница 41: ...n damper to the full open position Exhaust fan contacts enable during the DAMPER OPEN test Make sure to pause in the mode to allow exhaust contacts to energize due to the delay in the system DAMPER CL...

Страница 42: ...N A N A ACTUATOR ERROR Actuator has failed or become disconnected check for stall over voltage under voltage and actuator count Replace actuator if damper is movable and supply voltage is between 21 6...

Страница 43: ...NTILATION DCV OUTSIDE AIR GOOD TO ECONOMIZE Y1 I Y2 I FAN SPEED Y1 O Y2 O OCCUPIED UNOCCUPIED Below CO2 set No Off Off High 0 v Off 0 v Off VENTMIN Closed On Off High 24 v On 0 v Off VENTMIN Closed On...

Страница 44: ...gh 0 v Off 0 v Off VENTMIN to Full Open Closed to Full Open On On High 24 v On 0 v Off VENTMIN to Full Open Closed to Full Open Above CO2 set No Off Off High 0 v Off 0 v Off VENTMIN to VENTMAX Closed...

Страница 45: ...ess the Menu Up button to end the test The Checkout tests can all be performed at the time of installation or at any time during the operation of the system as a test that the system is operable TROUB...

Страница 46: ...let to the sam pling tube on the basepan ADDITIONAL APPLICATION DATA Refer to the application data document Factory Installed Smoke Detectors for Small and Medium Rooftop Units 2 to 25 Tons for discus...

Страница 47: ...terface PremierLink Louvered hail guard Motormaster head pressure controls Phase monitor control EnergyX Recovery Ventilation ERV Refer to separate installation instructions for information on in stal...

Страница 48: ...cpartners com TABLE 1 TABLE 2 BELT CROSS SECTION SMALLEST SHEAVE DIAMETER BELT DEFLECTION FORCE LBS UNNOTCHED BELTS NOTCHED BELTS USED NEW USED NEW A AX 3 0 3 6 3 7 5 5 4 1 6 1 3 8 4 8 4 5 6 8 5 0 7 4...

Страница 49: ......

Страница 50: ...o discontinue or change at any time specifications or designs without notice and without incurring obligations Catalog No 04 53500238 01 Printed in U S A Form 50HC 4 6 03SI Pg 50 12 19 Replaces 50HC 4...

Страница 51: ...ns and terminals are tight Y N _____ Check that indoor air filters are clean and in place Y N _____ Check that outdoor air inlet screens are in place Y N _____ Verify that unit is level Y N _____ Chec...

Страница 52: ...outlet or reheat coil _______________ F E Confirm correct rotation for compressor Y N _____ F Check for correct ramp up of outdoor fan motor as condenser coil warms Y N _____ 4 Check unit charge per c...

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