48HC
Single Package Rooftop
Gas Heating/Electric Cooling Unit
with Puron
r
(R---410A) Refrigerant
Sizes: 17, 20, 24, 28
Installation Instructions
NOTE
: Read the entire instruction manual before starting
the installation
TABLE OF CONTENTS
SAFETY CONSIDERATIONS
2
. . . . . . . . . . . . . . . . . . . .
INSTALLATION
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jobsite Survey
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 1 -- Plan for Unit Location
9
. . . . . . . . . . . . . . . . . .
Roof Mount
9
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Step 2 -- Plan for Sequence of Unit Installation
10
. . . . .
Curb--Mount Installation
10
. . . . . . . . . . . . . . . . . . . .
Pad--Mount Installation
10
. . . . . . . . . . . . . . . . . . . . .
Frame--Mount Installation
10
. . . . . . . . . . . . . . . . . . .
Step 3 -- Inspect Unit
10
. . . . . . . . . . . . . . . . . . . . . . . . . .
Step 4 -- Provide Unit Support
10
. . . . . . . . . . . . . . . . . .
Roof Curb Mount
10
. . . . . . . . . . . . . . . . . . . . . . . . .
Slab Mount (Horizontal Units Only)
10
. . . . . . . . . .
Alternate Unit Support
(In Lieu of Curb or Slab Mount)
10
. . . . . . . . . . . . .
Step 5 -- Field Fabricate Ductwork
14
. . . . . . . . . . . . . . .
Step 6 -- Rig and Place Unit
14
. . . . . . . . . . . . . . . . . . . .
Positioning on Curb
15
. . . . . . . . . . . . . . . . . . . . . . .
Step 7 -- Horizontal Duct Connection
15
. . . . . . . . . . . .
Step 8 -- Install Outside Air Hood — Factory Option
15
. .
Step 9 -- Install Flue Hood and Combustion Air Hood
16
. .
Step 10 -- Install Gas Piping
16
. . . . . . . . . . . . . . . . . . . .
Gas Supply Line
16
. . . . . . . . . . . . . . . . . . . . . . . . . .
Factory--Option Thru--Base Connections
18
. . . . . . .
Step 11 -- Install External Condensate Trap and Line
19
. .
Step 12 -- Make Electrical Connections
19
. . . . . . . . . . .
Field Power Supply
19
. . . . . . . . . . . . . . . . . . . . . . . .
Units without Factory--Installed Disconnect
20
. . . .
Units with Factory--Installed Disconnect
20
. . . . . . .
All Units
20
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Convenience Outlets
20
. . . . . . . . . . . . . . . . . . . . . . .
Factory--Option Thru--Base Connections
22
. . . . . .
Units without Thru--Base Connections
22
. . . . . . . . .
Field Control Wiring
22
. . . . . . . . . . . . . . . . . . . . . . .
Thermostat
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit without Thru--Base Conversion Kit
22
. . . . . . .
Heat Anticipator Settings
23
. . . . . . . . . . . . . . . . . . .
Transformer Connection
for 208--v Power Supply
23
. . . . . . . . . . . . . . . . . . . . .
Humidi--MiZer
R
Control Connections
24
. . . . . . . . . .
Humidi--MiZer -- Space RH Controller
24
. . . . . . . .
PremierLink
t
(Factory Option)
26
. . . . . . . . . . . . . . .
Supply Air Temperature (SAT) Sensor
29
. . . . . . . . .
Outdoor Air Temperature (OAT) Sensor
29
. . . . . . .
EconoMi$er2
29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Field Connections
29
. . . . . . . . . . . . . . . . . . . . . . . . . .
Space Sensors
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connect Thermostat
31
. . . . . . . . . . . . . . . . . . . . . . .
Configure the Unit for Thermostat Mode
31
. . . . . .
Economizer Controls
32
. . . . . . . . . . . . . . . . . . . . . . . .
Indoor Air Quality (CO
2
) Sensor
32
. . . . . . . . . . . . .
Outdoor Air Quality Sensor
32
. . . . . . . . . . . . . . . . .
Space Relative Humidity Sensor or
Humidistat Connections
33
. . . . . . . . . . . . . . . . . . . .
Smoke Detector/Fire Shutdown (FSD)
34
. . . . . . . . .
Filter Status Switch
34
. . . . . . . . . . . . . . . . . . . . . . . .
Supply Fan Status Switch
34
. . . . . . . . . . . . . . . . . . .
Remote Occupied Switch
34
. . . . . . . . . . . . . . . . . . .
Power Exhaust (output)
34
. . . . . . . . . . . . . . . . . . . . .
CCN Communication Bus
35
. . . . . . . . . . . . . . . . . .
RTU Open Control System
36
. . . . . . . . . . . . . . . . . . .
Supply Air Temperature (SAT) Sensor
39
. . . . . . . . .
Outdoor Air Temperature (OAT) Sensor
39
. . . . . . .
EconoMi$er2
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Summary of Contents for 48TC*D
Page 3: ...3 C10896 Fig 1 Unit Dimensional Drawing 17 Size Unit 48HC...
Page 4: ...4 C10897 Fig 1 Unit Dimensional Drawing 17 Size Unit cont 48HC...
Page 5: ...5 C10892 Fig 2 Unit Dimensional Drawing 20 and 24 Size Units 48HC...
Page 6: ...6 C10893 Fig 2 Unit Dimensional Drawing 20 and 24 Size Units cont 48HC...
Page 7: ...7 C10900 Fig 3 Unit Dimensional Drawing 28 Size Unit 48HC...
Page 8: ...8 C10901 Fig 3 Unit Dimensional Drawing 28 Size Unit cont 48HC...
Page 11: ...11 C10954 Fig 6 Roof Curb Details 17 Size Unit 48HC...
Page 12: ...12 C10955 Fig 7 Roof Curb Details 20 and 24 Size Units 48HC...
Page 13: ...13 C10956 Fig 8 Roof Curb Details 28 Size Unit 48HC...
Page 27: ...27 C11140 Fig 38 PremierLink Wiring Schematic 48HC...
Page 28: ...28 C11141 Fig 39 PremierLink Wiring Schematic with Humidi MiZerR 48HC...
Page 37: ...37 C11142 Fig 58 RTU Open System Control Wiring Diagram 48HC...
Page 38: ...38 C11143 Fig 59 RTU Open System Control Wiring Diagram with Humidi MiZerR 48HC...
Page 51: ...51 48HC...
