Reznor UEAS Unit Installation Manual - Manual (Page 43)

Operating Principle showing
Combustion Airflow and
Supply Airflow
This unit heater is a high efficiency appliance designed to extract part of the latent heat from the products of combustion. This
process forms condensation which is collected and directed to a drainage point inside the unit. The heater is equipped with a 1/2”
(12.7mm) PVC pipe for connecting to a condensate drain. The water condensed from the products of combustion will be acidic.
The level of concentration is dependent upon the environment where the appliance is installed and may be as high as 6PH. DO
NOT USE COPPER OR COPPER BASED ALLOYS FOR CONDENSATE DRAINS.
Room Supply
Air Intake
Warm
Air
Discharge
Flue Gas Outlet
Cooler flue gas tem-
perature requires a
condensate drain in
the vent.
Condensate
drain connection from
the secondary heat exchanger
Outside
Combustion Air
to the Burner
INDEX
A
Abnormal Heat Cycle Functions
31
B
Burner Maintenance 35, 36
Burner Orifice 37
Burner Removal Instructions
35, 36
C
California Warning Label 4
Check Installation After Startup
34
Check the Installation Prior to
Startup 33
Clearance 16
Clearances 7
Combustion Air Inlet 12
Combustion Air Inlet Pipe 12
Combustion Air Pipe Support
16
Combustion Air Pressure
Switch 39
Combustion Air Proving
(Pressure Switch) 29
Concentric Adapter Box
Connections 17
Concentric Adapter Box
Dimensions 16, 17
Condensate Drain 25, 26
Condensate Drain System 40
Condensate Drain Traps 25
Continuous Fan Operation 32
Location of Controls 37
Control Wiring 27
Conversion Instructions 11
Converting to Propane 11, 12
D
Derate by Valve Outlet
Pressure 10
Dimensions 6
Disconnect Switch 40
Door Switch 30, 39
Downturn Nozzle 6
DSI Integrated Control Module
30, 37, 41
E
Electrical Supply 26
F
Fan/Blower OFF Delay Settings
30
Fan Blades 38
Fan Motor 38
Fault Modes 32
Flame Sensor 38
G
Gas Connections 8
Gas Supply 8
Gas Valve 29, 34, 39
H
Hanging the Heater 7
HAZARD INTENSITY LEVELS
2
Hazards of Chlorine 5
Normal Heat Cycle Operating
Sequence 31
Heat Exchanger Maintenance
35
High Altitude 7
High Altitude Capacity 11
High Altitude Derate 10
Horizontal Vent/Combustion Air
Kit Option CC6 18
Horizontal Vent/Combustion Air
Terminal (Option CC6) 20
I
Ignition System 30, 37, 38
Ignitor 38
Installation Codes 3, 4
J
Joints 14
L
LED Codes 40
Length 14
Limit Control 30, 39
Heater Location 4
Lockout 32
M
Maintenance Schedule 35
Massachusetts Requirement 4
Motor Overload Protection 30
O
Operating Instructions 34
Operating Principle 43
Operating Sequence 34
Option CL31 29
Option CL32 29
P
Type of Pipe 12
Pipe Diameter 14
Pressure Sensing Tap 38
Pressure Setting 9
Pressure Switch Identification
29
S
Special Installations 3
Startup 33
Swivel Connectors 7
T
Terminal Strip 27
Thermostat 29
Heater Throw 4
Transformer 39
Troubleshooting 40
U
Uncrating 5, 6
V
Valve Outlet Pressure 9
Valve Outlet Pressure Settings
by Elevation 10
Vent/Combustion Air System
40
Venter Motor 38
Venter Outlet 12
Vent Pipe 12
Vent Pipe Support 15
Vent Temperature Limiting
Switch 30
Vent Temperature Limit Switch
40
Vertical Vent/Combustion Air Kit
Option CC2 22
Vertical Vent/Combustion Air
Terminal (Option CC2) 24
W
Warranty 3
Wiring Diagram 28
Form I-UEAS, P/N 221232 R13, Page 43