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516 01 3604 04

Specifications subject to change without notice.

13

Fig. 15 — Damper Assembly

ECONOMIZER AND TWO-POSITION HOOD

ASSEMBLY
NOTE: If the power exhaust accessory is to be installed on

the unit, the hood shipped with 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 screws along the sides and

bottom of the indoor coil access panel. See Fig. 16.

2. Swing  out  indoor  coil  access  panel  and  insert  the

hood sides under the panel (hood top). Be careful not

to  lift the  panel too  far  as  it  might fall out. Use  the

screws provided to attach the hood sides to the hood

top. Use screws provided to attach the hood sides to

the unit. See Fig. 17.

3. Remove  the  shipping  tape  holding  the  economizer

barometric relief damper in place (economizer only).

4. Insert the hood divider between the hood sides. See

Fig. 17 and 18. Secure hood divider with 3 screws on

each hood side. The hood divider is also used as the

bottom filter rack for the aluminum filter.

5. Attach  the  post  that  separates  the  filters  with  the

screws provided.

6. Open the filter clips which are located underneath the

hood top. Insert the aluminum filter into the bottom fil

-

ter  rack  (hood  divider).  Push  the  filter  into  position

past the open filter clips. Close the filter clips to lock

the filter into place. See Fig. 18.

7. Install the two rain deflectors on the edge of the hood

top as shown in Fig. 17.

8. Caulk the ends of the joint between the unit top panel

and the hood top.

9. Replace the filter access panel.

Fig. 16 — Indoor Coil Access Panel Relocation

Fig. 17 —  Economizer Hood Construction

Fig. 18 — Economizer Filter Installation

HOOD PARTS

PLASTIC TIE WRAP
QTY (2)

SCREWS FOR METAL TRAY
QTY (2)

TOP
PANEL

INDOOR
COIL
ACCESS
PANEL

INDOOR
COIL
ACCESS
PANEL

CAULK
HERE

TOP
PANEL

RAIN DEFLECTORS

TOP
PANEL

INDOOR COIL
ACCESS PANEL

SCREW

HOOD DIVIDER

LEFT
HOOD
SIDE

DIVIDER

BAROMETRIC
RELIEF

CLEANABLE
ALUMINUM
FILTER

FILTER

HOOD

FILTER
CLIP

OUTSIDE
AIR

Summary of Contents for RHH120

Page 1: ...RING DIAGRAMS Economi er X Factory Option 27 SYSTEM COMPONENTS SPECIFICATIONS INPUTS OUTPUTS ENVIRONMENTAL ECONOMIZER MODULE WIRING DETAILS INTERFACE OVERVIEW ENTHALPY SETTINGS TWO SPEED FAN OPERATION...

Page 2: ...t DANGER ELECTRICAL SHOCK HAZARD Failure to follow this warning will result in personal injury or death Before performing service or maintenance operations on unit turn off main power switch to unit a...

Page 3: ...Enthalpy Sensor P 2 Position Damper w Barometric Relief U Ultra Low Leak Economizer w Barometric Relief OA Temp Sensor W Ultra Low Leak Economizer w Barometric Relief Enthalpy Sensor Outdoor Air Optio...

Page 4: ...4 Specifications subject to change without notice 516 01 3604 04 Fig 2 Unit Dimensional Drawing Size 120 Units...

Page 5: ...516 01 3604 04 Specifications subject to change without notice 5 Fig 2 Unit Dimensional Drawing Size 120 Units cont...

Page 6: ...clearances LOCATION DIMENSION CONDITION A 48 in 1219 mm 18 in 457 mm 18 in 457 mm 12 in 305 mm Unit disconnect is mounted on panel No disconnect convenience outlet option Recommended service clearance...

Page 7: ...o the check valve core s bottom O ring Install the fitting body and torque to 96 10 in lbs 10 9 1 Nm Do not exceed 106 in lbs 11 9 Nm when tightening INSTALLATION Jobsite Survey Complete the following...

Page 8: ...ing 8 Make electrical connections 9 Install other accessories FRAME MOUNTED INSTALLATION Frame mounted applications generally follow the sequence for a curb installation Adapt the sequence as required...

Page 9: ...516 01 3604 04 Specifications subject to change without notice 9 Fig 6 Roof Curb Details REV 50TM500827...

Page 10: ...t is ready to be rigged and no longer will be lift ed by a fork truck the wood protector under the basepan must be removed Remove 4 screws from each base rail Wood protector will drop to the ground Se...

Page 11: ...iscard the supply duct cover Install accessory CRDUCTCV001A00 to cover the vertical supply duct open ing Use the return duct cover removed from the unit end panel to cover the vertical return duct ope...

Page 12: ...own form and assembled to a metal support tray using plastic stretch wrap Located in the return air compartment the assembly s metal tray is at tached to the basepan and also attached to the damper us...

Page 13: ...e hood sides See Fig 17 and 18 Secure hood divider with 3 screws on each hood side The hood divider is also used as the bottom filter rack for the aluminum filter 5 Attach the post that separates the...

Page 14: ...must be used to route the main power from the condenser end of the unit to either the factory option disconnect the bottom of the control box or the single point box accessory One inch conduit is pro...

Page 15: ...1 4 in female spade connector from the 230 v connection and moving it to the 200 v 1 4 in male terminal on the prima ry side of the transformer Refer to unit label diagram for ad ditional information...

Page 16: ...m deviation is 4 v Determine percent of voltage imbalance This amount of phase imbalance is satisfactory as it is below the maxi mum allowable 2 Operation on improper line voltage or excessive phase i...

Page 17: ...socket re install 3 hex screws on the NFD enclosure 12 Re install the unit front panel Fig 29 Handle and Shaft Assembly for NFD CONVENIENCE OUTLETS Two types of convenience outlets are offered on RHH...

Page 18: ...the bottom of the dis connect box For the load side wiring to the factory option disconnect route the wires through the hole on the right side of the disconnect Be sure to create a drip loop at least...

Page 19: ...conduits Connect the power con duit to the internal disconnect if unit is so equipped or to the external disconnect through unit side panel Remove one of the two knockouts located on the bottom left...

Page 20: ...ng valve position Reversing valves are ener gized during the cooling stages and the defrost cycle and de energized during heating cycles Once energized at the start of a cooling stage the reversing va...

Page 21: ...DI 24 vac P2 4 CTB Y2 W1 Heat 1 DI 24 vac P2 7 CTB W1 W2 Heat 2 DI 24 vac P2 6 CTB W2 R Power 24 vac P3 1 CONTL BRD 8 C Common 24 vac P3 2 CONTL BRD 4 DFT 1 DI 24 vac DFT 1 to DFT 1 DFT 2 DI 24 vac D...

Page 22: ...he bottom left side of the control box after removing one of the two knockouts in the corner of the box Using a connector at the control box to protect the wire as it passes into the control box Pull...

Page 23: ...can be installed in the unit Use the wir ing procedure listed below for each heater as determined by the number of stages in the heater Single Stage Heaters Single stage heaters will have an orange a...

Page 24: ...ce 516 01 3604 04 Fig 41 Accessory Electric Heater Control Connections NOTE Optional Outdoor Temperature Control at One Heater Stage Move either heater wire to this terminal and connect outdoor temper...

Page 25: ...25 Specifications subject to change without notice 516 01 3604 04 Fig 42 Typical RHH Control Wiring Diagram...

Page 26: ...26 Specifications subject to change without notice 516 01 3604 04 Fig 43 Typical RHH Power Wiring Diagram 208 230 3 60 unit shown...

Page 27: ...module includes terminals for CO2 sensor Mixed Air sensor and an Outdoor Dry Bulb sensor Enthalpy and other options are available with bus sensors User Interface The interface provides status for norm...

Page 28: ...040839 001 Rev G HJW10 www energy ca gov Certified FDD Product California Title 24 Part 6 Table 8 Economizer Module Left Hand Terminal Blocks LABEL TYPE DESCRIPTION Top Left Terminal Block MAT MAT 20k...

Page 29: ...D display and a 4 button keypad on the front of the economizer controller Keypad Use the four navigation buttons see Fig 48 to scroll through the menus and menu items select menu items and to change p...

Page 30: ...ETUP ADVANCED SETUP CHECKOUT ALARMS NOTE Some parameters in the menus use the letters MA or MAT indicating a mixed air temperature sensor location before the cooling coil This unit application has the...

Page 31: ..._ F if not connected short or out of range DA TEMP _ _ _ F 0 F to 140 F 18 C to 60 C DISCHARGE AIR TEMPERATURE after Heating section Displays when Discharge Air sensor is connected and displays measu...

Page 32: ...2 8 V 2 to 10 Vdc DCV MAXIMUM DAMPER POSITION Displays only if a CO2 sensor is connected Used for Vbz ventilation max cfm setpoint Displays 2 to 10 V if 3 sensors RA OA and MA In AUTO mode dampers con...

Page 33: ...SET 45 F 35 F to 55 F 2 C to 13 C Incremented by 10 F SUPPLY AIR TEMPERATURE LOW LIMIT Temperature to achieve Freeze Protection close damper and alarm if temperature falls below setup value FREEZE POS...

Page 34: ...r has failed or become disconnected check wiring then replace sensor if the alarm continues CO2 SENS ERR N A N A CO2 SENSOR ERROR CO2 sensor has failed gone out of range or become disconnected check w...

Page 35: ...tion settings and checkout menu readings see Table 13 See Tables 14 21 for dry bulb and enthalpy sequence of operation With stage 3 delay STG3 DLY in Advanced setup menu second stage of mechanical coo...

Page 36: ...v On 0 v Off VENTMIN to VENTMAX Closed On On High 24 v On 24 v On VENTMIN to VENTMAX Closed Yes Off Off High 0 v Off 0 v Off VENTMIN to VENTMAX Closed On Off High 0 v Off 0 v Off VENTMIN to Full Open...

Page 37: ...O Y2 O OCCUPIED UNOCCUPIED None No Off Off Low 0 v Off 0 v Off MIN POS L Closed On Off Low 24 v On 0 v Off MIN POS L Closed On On High 24 v On 24 v On MIN POS H Closed Yes Off Off Low 0 v Off 0 v Off...

Page 38: ...y for differential enthalpy The high limit boundary is ES1 when there are no stages of mechanical cooling energized and HL high limit when a compressor stage is energized Table 21 Enthalpy Operation w...

Page 39: ...ly items that are configured are shown in the Checkout menu NOTE For information about menu navigation and use of the keypad see Interface Overview on page 29 To perform a Checkout test 1 Scroll to th...

Page 40: ...mpling inlet to the sampling tube on the basepan 2 SPEED INDOOR FAN MOTOR SYSTEM WITH VARI ABLE FREQUENCY DRIVE FACTORY INSTALLED OPTION For details on operating RHH 2 stage cooling units equipped wit...

Page 41: ...he belt span length by 1 64 For example if the belt span length is 32 inches 32 x 1 64 1 2 inch deflection BELT FORCE DEFLECTION METHOD Check the belt tension with a spring force belt force deflec tio...

Page 42: ...ners www hvacpartners com 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 TABLE 1 TABLE 2 BELT CROS...

Page 43: ...opeller for location in housing orifice and verify setscrew is tight Y N _____ Verify that fan sheaves are aligned and belts are properly tensioned Y N _____ Verify that scroll compressors are rotatin...

Page 44: ...L2 _____________ L3 _____________ TEMPERATURES Outdoor air Temperature _____________ F DB Dry Bulb Return air Temperature _____________ F DB _____________ F Wb Wet Bulb Cooling Supply Air Temperature...

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