INSTALLATION Step 1 Ð Provide Unit Support
CONTENTS
IMPORTANT Ð READ BEFORE INSTALLING
SAFETY CONSIDERATIONS
Degrees and Inches
Fig. 1 Ð Roof Curb Sizes
UNIT LEVELING TOLERANCES DIMENSIONS
Degrees and Inches
Fig. 2 Ð Roof Curb Sizes
UNIT LEVELING TOLERANCES DIMENSIONS
Fig. 3 Ð Base Unit Dimensions, 50EJ/EK024-034
UNIT SIZE
Fig. 5 Ð Base Unit Dimensions, 50EW/EY024-034
UNIT SIZE
Fig. 7 Ð Rigging Label
WHEN RIGGING
NOTICE TO RIGGERS ALL PANELS MUST BE IN PLACE
Factory Speed Setting rpm
Table 1 Ð Physical Data
OPERATING WEIGHT lb
HIGH-PRESSURESWITCH psig
Factory Speed Setting rpm
Table 1 Ð Physical Data cont
OPERATING WEIGHT lb
HIGH-PRESSURESWITCH psig
Fig. 8 Ð Air Distribution Ð Thru-the-Bottom
Step 4 Ð Make Unit Duct Connections
Table 2 Ð Evaporator Fan Motor Data
Fig. 9 Ð Air Distribution Ð Thru-the-Side
Features with Thermostat Control of Unit
Fig. 11 Ð Field Control Remote Start/Stop
Fig. 12 Ð Control Board Diagram
Fig. 13 Ð Field Power Wiring Connections
Step 7 Ð Make Electrical Connections
1.Remove cap from red 208-vwire
Table 4 Ð Electrical Data Ð 50EJ,EK,EW,EY024-048
150/150
200/200
225/200
225/225
23.6
23.6
PEC − Power Exhaust Controller
Fig. 14 Ð Control Box Diagram Sizes
Fig. 15 Ð Control Box Diagram Sizes
PEC Ð Power Exhaust Controller
Fig. 17 Ð Field Control Temperature Sensor Wiring
Step 8 Ð Make Outdoor-AirInlet Adjustments
Fig. 16 Ð Field Control Thermostat Wiring
Table 5 Ð CCN Connection Approved Shielded Cables
Mounting Flange of Hood Sides
Fig. 18 Ð Adding Seal Strip to Top of Hood Sides
Fig. 20 Ð Adding Seal Strip to
Hood Top Mounting Flange
Attached to Filter Track Assembly
Fig. 21 Ð Adding Seal Strip to
Fig. 22 Ð Adding Foam Strip to Cross Member
Fig. 27 Ð Attaching Seal Strip to Filter Cover
Fig. 29 Ð Wire Connections for Solid State
Fig. 30 Ð Psychrometric Chart for
Fig. 28 Ð Differential Enthalpy Control
Fig. 31 Ð Barometric Relief Damper and Power
Exhaust Mounting Details
Fig. 32 Ð Pressure Transducer Locations
Fig. 33A Ð Motormaster III Sensor Location Sizes
Fig. 33C Ð Motormaster III Sensor Location
START-UP
Table 9 Ð Power Exhaust Default Set Points
Direct Digital Controls DIP Switch Congura
Table 8 Ð Potentiometer Signal Levels
SETTING
Sequence of Operation
AIRFLOW
AVAILABLE EXTERNAL STATIC PRESSURE in. wg
Table 15 Ð Air Quantity Limits
Table 16 Ð Motor Limitations
Table 17 Ð User Dened Set Points
The control module will operate economizer, run diag- nostics to monitor alarms/alerts at all times, and respond to CCN communications to perform any congured network POC product outboard control functions such as time/ outdoor-airtemperature broadcast and global occupancy broad- cast. When the optional expansion I/O board is employed, it will perform a periodic scan and maintain a database of ex- panded I/O points perform Fire/Smoke control power ex- haust required if in Occupied mode, perform IAQ control and monitor the fan, lter, demand limit, and eld-appliedstatus with accessories
Fig. 35 Ð Heat Interlock Relay Wiring
Fig. 36 Ð Space Temperature Sensor Wiring
CV Units with 2 Compressors
SERVICE
Table 18 Ð Cooling Capacity Staging Table
Table 19 Ð Cooling Capacity Staging Table
Lubrication
Evaporator Fan Service and Replacement
and Adjustment
Fig. 38 Ð Evaporator-FanPulley Alignment
Evaporator-FanMotor Replacement
Belt Tension Adjustment Ð To adjust belt tension
Condenser-FanAdjustment
Fig. 39 Ð Belt Tension Adjustment
Fig. 41 Ð Cooling Charging Chart Sizes
Fig. 42 Ð Cooling Charging Chart Sizes
50EJ,EK,EW,EY024-034
TROUBLESHOOTING
Fig. 43 Ð Typical Refrigerant Circuiting
LEGEND FPS Ð Freeze Protection Switch
Fig. 44 Ð Typical Refrigerant Circuiting
50EJ,EK,EW,EY038,044
HPS Ð High-PressureSwitch
LEGEND FPS Ð Freeze Protection Switch
Fig. 45 Ð Typical Refrigerant Circuiting
50EJ,EW048
HPS Ð High-PressureSwitch
Table 20 Ð Control Board LED Alarms
Table 22 Ð I/O Channel Designations
Table 21 Ð I/O Channel Designations
Base Module Ð CV
Base Module Ð VAV
Table 23 Ð I/O Channel Designations Expansion
Module Ð CV and VAV
Page
Page
PACKAGED SERVICE TRAINING
PRE-START-UP
START-UPCHECKLIST
TEMPERATURES
ELECTRICAL
START-UPCHECKLIST cont
GENERAL
